:root {
  color-scheme: dark;
  --bg: #080e1b;
  --bg-soft: #0c1425;
  --surface: #101a2c;
  --surface-2: #131f32;
  --text: #f4f5f8;
  --muted: #9aa6b9;
  --subtle: #6b7890;
  --line: rgba(206,218,240,.12);
  --gold: #d6b87a;
  --gold-bright: #ead4a2;
  --blue: #79a8ff;
  --shadow: 0 20px 55px rgba(0,0,0,.24);
  --max: 1160px;
  --radius: 12px;
  --font: 'DM Sans',sans-serif;
  --display: 'Manrope',sans-serif;
  scroll-behavior: smooth;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f7f8fc;
  --bg-soft: #eff2f8;
  --surface: #fff;
  --surface-2: #f2f4f9;
  --text: #111b2d;
  --muted: #516078;
  --subtle: #728098;
  --line: rgba(34,49,76,.13);
  --gold: #9b762e;
  --gold-bright: #7c5d20;
  --blue: #345fa6;
  --shadow: 0 20px 55px rgba(37,51,77,.09);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 var(--font);
  transition: background .25s,color .25s;
}

body:before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image: radial-gradient(1px 1px at 15% 21%,rgba(234,212,162,.4) 50%,transparent 100%),radial-gradient(1px 1px at 82% 42%,rgba(121,168,255,.35) 50%,transparent 100%),radial-gradient(1px 1px at 64% 78%,rgba(255,255,255,.2) 50%,transparent 100%);
  background-size: 370px 370px,510px 510px,440px 440px;
  opacity: .38;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 20;
  padding: 10px 16px;
  transform: translateY(-160%);
  background: var(--gold);
  color: #111;
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
}

:focus-visible {
  outline: 3px solid var(--gold-bright);
  outline-offset: 4px;
}

.section-wrap {
  width: min(var(--max),calc(100% - 64px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  padding: 0 max(32px,calc((100vw - var(--max))/2));
  height: 78px;
  background: color-mix(in srgb,var(--bg) 88%,transparent);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font: 800 17px var(--display);
  letter-spacing: -.8px;
  white-space: nowrap;
}

.brand b {
  color: var(--gold);
  margin-left: 3px;
}

.brand-light {
  font-weight: 500;
  color: var(--muted);
  margin-left: 3px;
}

.brand-mark {
  font-size: 22px;
  color: var(--gold);
  line-height: 1;
}

.nav {
  display: flex;
  align-items: center;
  gap: 34px;
  margin-left: auto;
}

.nav a {
  font-size: 13px;
  color: var(--muted);
  transition: color .2s;
}

.nav a:hover,.nav a[aria-current=page] {
  color: var(--text);
}

.nav a span {
  color: var(--gold);
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 12px;
  cursor: pointer;
  min-height: 40px;
}

.theme-toggle:hover {
  color: var(--text);
  border-color: var(--gold);
}

.theme-icon {
  font-size: 16px;
  color: var(--gold);
}

.menu-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: 630px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 40px;
  padding-top: 66px;
  padding-bottom: 92px;
}

.hero-copy {
  max-width: 570px;
  position: relative;
  z-index: 1;
}

.eyebrow,.section-kicker,.lesson-tag {
  font-size: 10px;
  letter-spacing: 2px;
  font-weight: 700;
  color: var(--gold);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 23px;
}

.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 12px var(--gold);
}

h1,h2,h3,p {
  margin-top: 0;
}

h1,h2,h3 {
  font-family: var(--display);
}

.hero h1,.learn-hero h1 {
  font-size: clamp(42px,5.4vw,68px);
  letter-spacing: -3.4px;
  line-height: 1.08;
  margin-bottom: 23px;
  font-weight: 600;
}

.hero h1 span,.learn-hero h1 span {
  color: var(--gold);
  font-weight: 400;
}

.hero-lede {
  max-width: 475px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 25px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
  min-height: 48px;
  padding: 0 19px;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 700;
  transition: transform .2s,background .2s,border-color .2s;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  background: var(--gold);
  color: #101521;
}

.button-primary:hover {
  background: var(--gold-bright);
}

.button-primary span,.text-link span {
  font-size: 16px;
}

.text-link {
  font-size: 12px;
  color: var(--muted);
}

.text-link:hover {
  color: var(--text);
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 11px;
  margin-top: 44px;
  max-width: 410px;
  color: var(--subtle);
  font-size: 11px;
}

.note-icon {
  color: var(--gold);
  font-size: 17px;
}

.orbit-scene {
  height: 440px;
  max-width: 510px;
  width: 100%;
  justify-self: end;
  position: relative;
  display: grid;
  place-items: center;
}

.orbit-scene:before {
  content: "";
  position: absolute;
  width: 270px;
  height: 270px;
  border-radius: 50%;
  background: radial-gradient(circle,rgba(56,95,157,.19),transparent 70%);
  filter: blur(8px);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(214,184,122,.33);
  border-radius: 50%;
  transform: rotate(-27deg);
}

.orbit-one {
  width: 370px;
  height: 155px;
}

.orbit-two {
  width: 460px;
  height: 196px;
  transform: rotate(28deg);
}

.orbit-three {
  width: 312px;
  height: 312px;
  border-color: rgba(121,168,255,.18);
}

.planet {
  position: absolute;
  border-radius: 50%;
}

.planet-main {
  width: 158px;
  height: 158px;
  background: radial-gradient(circle at 32% 25%,#839fc2 0,#3a567e 25%,#152d4e 58%,#09172a 80%);
  box-shadow: inset -14px -12px 25px rgba(0,0,0,.38),inset 5px 5px 20px rgba(187,213,246,.2),0 0 60px rgba(65,110,182,.22);
}

.planet-main:after {
  content: "";
  position: absolute;
  inset: 22% 0 0;
  border-radius: 50%;
  background: linear-gradient(145deg,transparent 25%,rgba(112,156,207,.13) 26% 33%,transparent 34% 48%,rgba(112,156,207,.1) 49% 54%,transparent 55%);
}

.planet-small {
  width: 24px;
  height: 24px;
  background: radial-gradient(circle at 35% 30%,#efdcae,#aa8745 72%);
  top: 22%;
  right: 18%;
  box-shadow: 0 0 20px rgba(214,184,122,.2);
}

.planet-gold {
  width: 13px;
  height: 13px;
  background: #a8c4ec;
  bottom: 27%;
  left: 20%;
  box-shadow: 0 0 18px #7599ce;
}

.scene-star {
  position: absolute;
  color: var(--gold);
  font-size: 18px;
}

.star-one {
  top: 18%;
  left: 27%;
}

.star-two {
  bottom: 25%;
  right: 19%;
  font-size: 25px;
  color: var(--blue);
}

.star-three {
  top: 38%;
  right: 10%;
  font-size: 30px;
}

.scene-caption {
  position: absolute;
  bottom: 8px;
  left: 10%;
  right: 0;
  display: flex;
  justify-content: space-between;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  font-size: 8px;
  letter-spacing: 1.5px;
  color: var(--subtle);
}

.scroll-hint {
  position: absolute;
  bottom: 30px;
  left: 0;
  color: var(--subtle);
  font-size: 10px;
  letter-spacing: .6px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.scroll-hint span {
  height: 28px;
  width: 1px;
  background: var(--gold);
  opacity: .65;
}

.intro {
  padding-top: 87px;
  padding-bottom: 102px;
  border-top: 1px solid var(--line);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1fr .76fr;
  gap: 70px;
  margin-top: 20px;
}

.intro h2,.section-heading h2,.learn-intro h2,.adapt-section h2 {
  font-size: clamp(30px,3.4vw,43px);
  letter-spacing: -1.8px;
  line-height: 1.2;
  font-weight: 500;
  margin: 0;
}

.intro h2 span,.learn-intro h2 span,.adapt-section h2 span {
  color: var(--muted);
}

.intro-copy {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.85;
}

.intro-copy p {
  margin-bottom: 12px;
}

.intro-copy strong {
  color: var(--text);
}

.principles {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 28px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.principles article {
  padding-right: 24px;
  border-right: 1px solid var(--line);
}

.principles article:last-child {
  border: 0;
}

.principle-number {
  font-size: 10px;
  color: var(--gold);
  letter-spacing: 1px;
}

.principles h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 14px 0 6px;
}

.principles p {
  color: var(--muted);
  font-size: 12px;
  margin: 0;
  max-width: 245px;
}

.animations-section,.lesson-section {
  padding: 86px 0 92px;
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 36px;
}

.section-heading h2 {
  margin-top: 13px;
}

.section-heading h2 span {
  color: var(--muted);
  font-weight: 400;
}

.section-heading>p {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.75;
}

.animation-grid {
  display: grid;
  grid-template-columns: repeat(3,1fr);
  gap: 20px;
}

.animation-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform .25s,border-color .25s,box-shadow .25s;
}

.animation-card:hover {
  transform: translateY(-5px);
  border-color: rgba(214,184,122,.45);
  box-shadow: var(--shadow);
}

.card-art {
  height: 190px;
  position: relative;
  overflow: hidden;
  background: #101c32;
}

.art-label {
  position: absolute;
  z-index: 2;
  top: 17px;
  left: 17px;
  color: rgba(255,255,255,.76);
  font-size: 8px;
  letter-spacing: 1.7px;
}

.art-number {
  position: absolute;
  right: 17px;
  bottom: 10px;
  font: 300 50px var(--display);
  color: rgba(255,255,255,.15);
}

.art-orbit {
  background: radial-gradient(circle at 50% 55%,#233d60,#111d33 65%,#0c1425);
}

.art-orbit-ring {
  position: absolute;
  top: 55px;
  left: 50%;
  width: 230px;
  height: 90px;
  border: 1px solid rgba(226,198,137,.63);
  border-radius: 50%;
  transform: translateX(-50%) rotate(-29deg);
}

.art-orbit-ring:after {
  content: "";
  position: absolute;
  inset: 12px -22px;
  border: 1px solid rgba(113,154,209,.3);
  border-radius: 50%;
  transform: rotate(55deg);
}

.art-orbit-ball {
  position: absolute;
  left: calc(50% - 39px);
  top: 58px;
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 25%,#a7c2e8,#496a96 48%,#152944 80%);
  box-shadow: inset -6px -8px 12px #111d30,0 0 35px rgba(80,122,183,.22);
}

.art-wave {
  background: radial-gradient(ellipse at 50% 50%,#1b3659,#101b30 70%);
}

.wave-lines {
  position: absolute;
  inset: 40px 0;
  background: repeating-radial-gradient(ellipse at 10% 50%,transparent 0 13px,rgba(137,176,224,.53) 14px 15px,transparent 16px 26px);
  transform: scaleX(1.4);
  mask-image: linear-gradient(90deg,transparent,#000 15% 84%,transparent);
}

.art-gravity {
  background: radial-gradient(ellipse at 50% 50%,#1d304a,#111b2b 75%);
}

.gravity-grid {
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg,transparent 0 24px,rgba(133,168,211,.2) 25px),repeating-linear-gradient(90deg,transparent 0 24px,rgba(133,168,211,.2) 25px);
  transform: perspective(150px) rotateX(47deg) scale(1.5);
  transform-origin: center 75%;
  mask-image: radial-gradient(ellipse at 50% 57%,#000 5%,transparent 67%);
}

.gravity-star {
  position: absolute;
  left: calc(50% - 27px);
  top: 67px;
  width: 54px;
  height: 54px;
  background: radial-gradient(circle at 45% 45%,#f1ddae,#bd9651 30%,rgba(177,132,61,.1) 72%,transparent 73%);
  border-radius: 50%;
  filter: drop-shadow(0 0 15px rgba(222,186,119,.5));
}

.card-content {
  padding: 19px 20px 21px;
}

.card-meta {
  display: flex;
  justify-content: space-between;
  color: var(--gold);
  font-size: 9px;
  letter-spacing: .6px;
}

.card-meta span:last-child {
  color: var(--subtle);
}

.card-content h3 {
  font-size: 17px;
  margin: 10px 0 7px;
  font-weight: 600;
}

.card-content p {
  color: var(--muted);
  font-size: 11px;
  min-height: 42px;
  margin-bottom: 17px;
  line-height: 1.7;
}

.card-link {
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--line);
  padding-top: 13px;
}

.card-link span {
  color: var(--gold);
  font-size: 16px;
}

.placeholder-note {
  margin: 19px 0 0;
  color: var(--subtle);
  font-size: 10px;
}

.placeholder-note span {
  color: var(--gold);
  margin-right: 5px;
}

.placeholder-note code {
  color: var(--muted);
  font-size: 10px;
}

.downloads-section {
  padding-top: 91px;
  padding-bottom: 94px;
}

.download-list {
  border-top: 1px solid var(--line);
}

.download-item {
  display: grid;
  grid-template-columns: 54px 1fr auto 96px;
  align-items: center;
  gap: 19px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.download-symbol {
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--gold);
  font-size: 21px;
}

.download-info h3 {
  font-size: 14px;
  margin: 0 0 4px;
  font-weight: 600;
}

.download-info p {
  margin: 0;
  color: var(--muted);
  font-size: 10px;
}

.file-size {
  font-size: 8px;
  letter-spacing: 1px;
  color: var(--subtle);
}

.download-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid var(--line);
  padding: 9px 12px;
  border-radius: 4px;
  font-size: 10px;
  color: var(--text);
}

.download-button:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.download-button span {
  color: var(--gold);
  font-size: 16px;
}

.closing {
  border-block: 1px solid var(--line);
  padding-block: 56px;
  display: grid;
  grid-template-columns: 55px 1fr auto;
  align-items: center;
  gap: 24px;
  margin-bottom: 56px;
}

.closing-star {
  color: var(--gold);
  font-size: 33px;
  align-self: start;
}

.closing h2 {
  font-size: 26px;
  letter-spacing: -1px;
  line-height: 1.3;
  font-weight: 500;
  margin: 13px 0 8px;
}

.closing p {
  margin: 0;
  color: var(--muted);
  font-size: 11px;
}

.closing-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.button-outline {
  border: 1px solid var(--line);
  color: var(--text);
}

.button-outline:hover {
  border-color: var(--gold);
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 29px max(32px,calc((100vw - var(--max))/2)) 20px;
  background: var(--bg-soft);
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding-bottom: 23px;
  border-bottom: 1px solid var(--line);
}

.footer-top p {
  margin: 0;
  color: var(--subtle);
  font-size: 10px;
}

.back-top,.footer-bottom a {
  color: var(--muted);
  font-size: 10px;
}

.back-top:hover,.footer-bottom a:hover {
  color: var(--gold);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 16px;
  color: var(--subtle);
  font-size: 9px;
}

.learn-hero {
  position: relative;
  min-height: 425px;
  padding-top: 86px;
  padding-bottom: 75px;
  overflow: hidden;
}

.learn-hero>div:first-child,.learn-hero h1,.learn-hero>p,.learn-hero>.button {
  position: relative;
  z-index: 1;
}

.learn-hero h1 {
  font-size: clamp(42px,5.3vw,64px);
  margin-top: 20px;
  max-width: 720px;
}

.learn-hero>p {
  max-width: 545px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 24px;
}

.learn-hero-art {
  position: absolute!important;
  right: 10%;
  top: 76px;
  width: 290px;
  height: 290px;
  border: 1px solid rgba(214,184,122,.18);
  border-radius: 50%;
  display: grid;
  place-items: center;
  z-index: 0!important;
}

.learn-hero-art:before,.learn-ring {
  content: "";
  position: absolute;
  width: 370px;
  height: 130px;
  border: 1px solid rgba(214,184,122,.33);
  border-radius: 50%;
  transform: rotate(-34deg);
}

.learn-ring {
  width: 260px;
  height: 260px;
  border-color: rgba(121,168,255,.2);
  transform: none;
}

.learn-sphere {
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle at 33% 27%,#d2dced,#526e97 48%,#12233b 80%);
  box-shadow: inset -10px -10px 18px #101c2f,0 0 45px rgba(89,132,197,.22);
}

.learn-hero-art>span {
  position: absolute;
  color: var(--gold);
  font: 600 12px var(--display);
  letter-spacing: 3px;
  right: 1px;
  top: 42%;
}

.learn-intro {
  display: grid;
  grid-template-columns: 1fr .9fr;
  gap: 80px;
  padding-block: 70px;
  border-top: 1px solid var(--line);
}

.learn-intro h2 {
  font-size: 34px;
  margin-top: 15px;
}

.learn-intro p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.85;
}

.lesson-section .section-wrap {
  padding-bottom: 0;
}

.lesson-layout {
  display: grid;
  grid-template-columns: 225px 1fr;
  gap: 40px;
  align-items: start;
}

.lesson-nav {
  position: sticky;
  top: 102px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lesson-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  color: var(--muted);
  font-size: 10px;
  border-left: 1px solid var(--line);
}

.lesson-nav a:hover {
  color: var(--text);
  border-color: var(--gold);
}

.lesson-nav span {
  font-size: 9px;
  color: var(--gold);
}

.lesson-content {
  min-width: 0;
}

.lesson-card {
  display: grid;
  grid-template-columns: 45px 1fr;
  gap: 18px;
  padding: 27px 25px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  scroll-margin-top: 100px;
}

.lesson-num {
  font: 400 23px var(--display);
  color: var(--gold);
}

.lesson-tag {
  font-size: 8px;
}

.lesson-card h3 {
  font-size: 21px;
  margin: 8px 0 11px;
}

.lesson-card p,.lesson-card li {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.85;
}

.lesson-card p {
  margin-bottom: 11px;
}

.lesson-card strong {
  color: var(--text);
}

.lesson-card ul {
  margin: 0 0 11px;
  padding-left: 17px;
}

.lesson-card li {
  padding-left: 3px;
  margin: 3px 0;
}

.tip-box {
  background: var(--surface-2);
  border-left: 2px solid var(--gold);
  padding: 10px 13px;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.7;
}

.tip-box strong {
  color: var(--gold);
}

.video-placeholder {
  min-height: 110px;
  display: grid;
  grid-template-columns: 44px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 18px 23px;
  margin: 12px 0 22px;
  border: 1px dashed rgba(214,184,122,.4);
  border-radius: 8px;
  background: linear-gradient(110deg,rgba(17,31,52,.7),rgba(12,20,34,.48));
  scroll-margin-top: 100px;
}

.video-play {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(214,184,122,.55);
  color: var(--gold);
  font-size: 12px;
  padding-left: 2px;
}

.video-placeholder strong {
  font-size: 11px;
}

.video-placeholder p {
  color: var(--subtle);
  font-size: 10px;
  margin: 4px 0 0;
}

.video-placeholder>a {
  font-size: 10px;
  color: var(--gold);
  white-space: nowrap;
}

.adapt-section {
  padding-block: 83px;
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 24px;
  max-width: 850px;
}

.adapt-icon {
  font-size: 33px;
  color: var(--gold);
}

.adapt-section h2 {
  font-size: 33px;
  margin: 13px 0;
}

.adapt-section p {
  max-width: 690px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.85;
}

@media(min-width:1400px) {
  .hero {
    min-height: 680px;
  }

  .orbit-scene {
    transform: scale(1.07);
  }
}

@media(max-width:850px) {
  .section-wrap {
    width: min(var(--max),calc(100% - 44px));
  }

  .site-header {
    padding-inline: 22px;
  }

  .nav {
    gap: 19px;
  }

  .hero {
    min-height: 560px;
    gap: 5px;
  }

  .orbit-scene {
    transform: scale(.86);
    transform-origin: center right;
    margin-left: -30px;
  }

  .hero h1,.learn-hero h1 {
    font-size: 52px;
  }

  .intro-grid,.learn-intro {
    gap: 36px;
  }

  .lesson-layout {
    grid-template-columns: 175px 1fr;
    gap: 20px;
  }

  .lesson-card {
    padding: 22px 18px;
  }

  .file-size {
    display: none;
  }

  .download-item {
    grid-template-columns: 48px 1fr 95px;
  }

  .learn-hero-art {
    right: 3%;
    opacity: .65;
  }
}

@media(max-width:620px) {
  html {
    scroll-padding-top: 74px;
  }

  .section-wrap {
    width: calc(100% - 38px);
  }

  .site-header {
    height: 68px;
    padding-inline: 19px;
    gap: 12px;
  }

  .brand {
    font-size: 15px;
  }

  .brand-mark {
    font-size: 20px;
  }

  .menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    margin-left: auto;
    border: 1px solid var(--line);
    border-radius: 5px;
    background: transparent;
  }

  .menu-toggle span:not(.sr-only) {
    display: block;
    height: 1px;
    width: 17px;
    margin-inline: auto;
    background: var(--text);
  }

  .nav {
    display: none;
    position: absolute;
    top: 67px;
    left: 0;
    right: 0;
    padding: 14px 20px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav.is-open {
    display: flex;
  }

  .nav a {
    padding: 12px 3px;
    border-bottom: 1px solid var(--line);
  }

  .nav a:last-child {
    border: 0;
  }

  .theme-toggle {
    padding: 0;
    width: 41px;
    height: 40px;
    justify-content: center;
  }

  .theme-label {
    display: none;
  }

  .theme-icon {
    font-size: 18px;
  }

  .hero {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    min-height: auto;
    padding-top: 66px;
    padding-bottom: 77px;
    gap: 0;
  }

  .hero-copy {
    width: 100%;
  }

  .hero h1,.learn-hero h1 {
    font-size: 44px;
    letter-spacing: -2.4px;
  }

  .hero-lede {
    font-size: 14px;
  }

  .hero-actions {
    flex-wrap: wrap;
    gap: 18px;
    margin-top: 23px;
  }

  .hero-note {
    margin-top: 30px;
  }

  .orbit-scene {
    align-self: center;
    justify-self: auto;
    height: 310px;
    width: 100%;
    margin: 17px 0 -15px;
    transform: scale(.78);
    transform-origin: center center;
  }

  .scroll-hint {
    bottom: 17px;
  }

  .intro {
    padding-top: 60px;
    padding-bottom: 65px;
  }

  .intro-grid,.learn-intro {
    grid-template-columns: 1fr;
    gap: 20px;
    margin-top: 18px;
  }

  .intro h2,.section-heading h2 {
    font-size: 33px;
  }

  .intro-copy {
    font-size: 12px;
  }

  .principles {
    gap: 14px;
    margin-top: 35px;
    padding-top: 22px;
  }

  .principles article {
    padding-right: 10px;
  }

  .principles h3 {
    font-size: 14px;
  }

  .principles p {
    font-size: 10px;
    line-height: 1.6;
  }

  .animations-section,.lesson-section {
    padding: 62px 0;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    gap: 13px;
    margin-bottom: 24px;
  }

  .section-heading>p br {
    display: none;
  }

  .animation-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .card-art {
    height: 175px;
  }

  .card-content p {
    min-height: auto;
  }

  .downloads-section {
    padding-block: 63px;
  }

  .download-item {
    grid-template-columns: 38px 1fr 78px;
    gap: 11px;
    padding: 15px 0;
  }

  .download-symbol {
    width: 34px;
    height: 34px;
    font-size: 17px;
  }

  .download-info h3 {
    font-size: 12px;
  }

  .download-info p {
    font-size: 9px;
  }

  .download-button {
    padding: 9px;
    font-size: 9px;
  }

  .closing {
    grid-template-columns: 36px 1fr;
    margin-bottom: 38px;
    padding-block: 39px;
    gap: 15px;
  }

  .closing-star {
    font-size: 26px;
  }

  .closing h2 {
    font-size: 22px;
  }

  .closing-actions {
    grid-column: 2;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .button {
    min-height: 43px;
    padding-inline: 13px;
    font-size: 10px;
  }

  .site-footer {
    padding: 24px 19px 16px;
  }

  .footer-top {
    flex-wrap: wrap;
  }

  .footer-top p {
    order: 3;
    width: 100%;
  }

  .footer-bottom {
    flex-wrap: wrap;
    row-gap: 8px;
  }

  .footer-bottom span:nth-child(2) {
    display: none;
  }

  .learn-hero {
    min-height: 420px;
    padding-top: 67px;
    padding-bottom: 50px;
  }

  .learn-hero>p {
    font-size: 13px;
    max-width: 400px;
  }

  .learn-hero-art {
    width: 180px;
    height: 180px;
    top: auto;
    right: -16px;
    bottom: 23px;
    opacity: .38;
  }

  .learn-hero-art:before {
    width: 230px;
    height: 90px;
  }

  .learn-ring {
    width: 160px;
    height: 160px;
  }

  .learn-sphere {
    width: 68px;
    height: 68px;
  }

  .learn-intro {
    padding-block: 53px;
  }

  .learn-intro h2 {
    font-size: 30px;
  }

  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .lesson-nav {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-bottom: 9px;
  }

  .lesson-nav a {
    font-size: 9px;
    padding: 8px;
  }

  .lesson-card {
    grid-template-columns: 30px 1fr;
    gap: 11px;
    padding: 19px 15px;
  }

  .lesson-num {
    font-size: 18px;
  }

  .lesson-card h3 {
    font-size: 18px;
  }

  .lesson-card p,.lesson-card li {
    font-size: 10px;
  }

  .video-placeholder {
    grid-template-columns: 35px 1fr;
    gap: 11px;
    padding: 15px;
    margin-bottom: 16px;
  }

  .video-play {
    width: 33px;
    height: 33px;
  }

  .video-placeholder strong {
    font-size: 10px;
  }

  .video-placeholder>a {
    grid-column: 2;
  }

  .adapt-section {
    grid-template-columns: 40px 1fr;
    gap: 13px;
    padding-block: 57px;
  }

  .adapt-icon {
    font-size: 25px;
  }

  .adapt-section h2 {
    font-size: 27px;
  }
}

/* Brand and subject index */
body:before {
  display: none;
}
.brand {
  gap: 11px;
  font-size: 16px;
  letter-spacing: -.35px;
}
.brand-logo {
  display: block;
  width: 42px;
  height: 42px;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #050a1c;
}
.brand b {
  margin-left: 1px;
}
.hero-brand-visual {
  width: min(100%, 370px);
  justify-self: end;
  padding: 22px 28px 18px;
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  align-items: center;
}
.hero-brand-visual > img {
  display: block;
  width: min(100%, 190px);
  aspect-ratio: 1;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #050a1c;
}
.hero-brand-caption {
  display: grid;
  gap: 4px;
  text-align: center;
  margin-top: 14px;
}
.hero-brand-caption strong {
  font: 600 18px var(--display);
  letter-spacing: -.4px;
}
.hero-brand-caption span {
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 1.3px;
}
.hero-brand-stats {
  width: 100%;
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 17px;
  padding-top: 13px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}
.hero-brand-stats b {
  color: var(--gold);
  font: 600 15px var(--display);
  margin-right: 3px;
}
.topic-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 52px;
  row-gap: 35px;
}
.topic-group-heading {
  min-height: 35px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--line);
}
.topic-group-heading h3 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -.25px;
}
.topic-group-heading > span {
  color: var(--subtle);
  font-size: 10px;
}
.topic-links {
  display: grid;
  grid-template-columns: 1fr;
}
.topic-link {
  min-height: 49px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  border-bottom: 1px solid var(--line);
  transition: color .18s, padding .18s;
}
.topic-link:hover {
  padding-inline: 6px;
  color: var(--gold-bright);
}
.topic-link-name {
  font-size: 13px;
  line-height: 1.4;
}
.topic-link-count {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
  color: var(--subtle);
  font-size: 10px;
}
.topic-link-count b {
  color: var(--gold);
  font-size: 14px;
  font-weight: 500;
}
.section-kicker,.lesson-tag {
  letter-spacing: 1.25px;
}
.animations-section,.lesson-section {
  background: var(--bg-soft);
}
@media(max-width:850px) {
  .hero-brand-visual {
    width: min(100%, 320px);
    padding-inline: 20px;
  }
  .hero-brand-visual > img {
    width: 190px;
  }
  .topic-groups {
    column-gap: 28px;
  }
}
@media(max-width:620px) {
  .brand-logo {
    width: 38px;
    height: 38px;
  }
  .brand {
    font-size: 15px;
  }
  .hero-brand-visual {
    align-self: center;
    width: min(100%, 330px);
    margin: 22px auto 0;
    padding: 0;
    border-left: 0;
  }
  .hero-brand-visual > img {
    width: 180px;
  }
  .topic-groups {
    grid-template-columns: 1fr;
    row-gap: 27px;
  }
  .topic-link {
    min-height: 48px;
  }
}

@media(prefers-reduced-motion:reduce) {
  *,*::before,*::after {
    scroll-behavior: auto!important;
    transition: none!important;
    animation: none!important;
  }
}

.video-placeholder {
  min-height: 210px;
  padding: 25px 28px;
  background: radial-gradient(ellipse at 50% 50%,rgba(36,62,98,.46),transparent 70%),linear-gradient(110deg,rgba(17,31,52,.7),rgba(12,20,34,.48));
}

@media(max-width:620px) {
  .video-placeholder {
    min-height: 160px;
    padding: 16px;
  }
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4,minmax(0,1fr));
  gap: 12px;
}

.topic-card {
  min-height: 176px;
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
  transition: border-color .2s,transform .2s,background .2s;
}

.topic-card:hover {
  border-color: var(--gold);
  transform: translateY(-3px);
  background: var(--surface-2);
}

.topic-card-top {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 13px;
}

.topic-symbol {
  height: 37px;
  min-width: 37px;
  padding: 0 8px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 16px;
  color: var(--gold);
}

.topic-index {
  font-size: 10px;
  color: var(--subtle);
  letter-spacing: 1px;
}

.topic-area {
  font-size: 10px;
  color: var(--muted);
  margin-bottom: 3px;
}

.topic-card strong {
  font: 600 15px/1.35 var(--display);
  letter-spacing: -.25px;
}

.topic-card-bottom {
  width: 100%;
  margin-top: auto;
  padding-top: 16px;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 11px;
}

.topic-card-bottom span {
  color: var(--gold);
  font-size: 15px;
}

.topic-hero {
  padding-top: 36px;
  padding-bottom: 62px;
}

.breadcrumbs {
  display: flex;
  gap: 10px;
  align-items: center;
  color: var(--subtle);
  font-size: 11px;
  margin-bottom: 53px;
}

.breadcrumbs a:hover {
  color: var(--gold);
}

.breadcrumbs span[aria-hidden] {
  color: var(--gold);
}

.topic-hero-grid {
  display: grid;
  grid-template-columns: 1fr 190px;
  gap: 35px;
  align-items: center;
}

.topic-hero .eyebrow {
  margin-bottom: 12px;
}

.topic-hero h1 {
  font-size: clamp(36px,5vw,58px);
  letter-spacing: -2.3px;
  line-height: 1.15;
  margin: 0 0 14px;
}

.topic-hero-grid p {
  max-width: 750px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}

.topic-hero-mark {
  width: 144px;
  height: 144px;
  border: 1px solid rgba(214,184,122,.38);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font: 400 46px var(--display);
  color: var(--gold);
  justify-self: center;
  background: radial-gradient(circle,rgba(53,80,122,.25),transparent 70%);
}

.topic-key-ideas {
  margin-top: 37px;
  padding: 22px 25px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface);
}

.topic-key-ideas h2 {
  font: 600 14px var(--display);
  margin: 0 0 13px;
}

.topic-key-ideas ul {
  display: flex;
  flex-wrap: wrap;
  gap: 9px 28px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.topic-key-ideas li {
  position: relative;
  padding-left: 15px;
  color: var(--muted);
  font-size: 12px;
}

.topic-key-ideas li:before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--gold);
}

.topic-animations {
  padding: 69px 0 82px;
  background: var(--bg-soft);
  border-block: 1px solid var(--line);
}

.topic-animation-list {
  border-top: 1px solid var(--line);
}

.topic-animation-card {
  display: grid;
  grid-template-columns: 47px 1fr 164px;
  align-items: center;
  gap: 18px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.topic-animation-index {
  align-self: start;
  padding-top: 3px;
  color: var(--gold);
  font: 400 18px var(--display);
}

.topic-animation-copy .lesson-tag {
  font-size: 8px;
}

.topic-animation-copy h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 6px 0 5px;
}

.topic-animation-copy p {
  max-width: 720px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin: 0 0 9px;
}

.blend-filename {
  color: var(--subtle);
  font: 11px/1.5 Consolas,monospace;
  overflow-wrap: anywhere;
}

.blend-download {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--text);
  font-size: 12px;
}

.blend-download:hover {
  border-color: var(--gold);
  color: var(--gold);
}

.blend-download span {
  color: var(--muted);
  font-size: 10px;
}

.blend-download b {
  color: var(--gold);
  font-size: 17px;
}

.blender-open-note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 23px;
  padding: 16px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.blender-open-note .note-icon {
  flex: none;
}

.blender-open-note p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.8;
}

.blender-open-note strong,.blender-open-note b {
  color: var(--text);
}

.blender-open-note code {
  color: var(--gold);
  font-size: 11px;
}

.blender-open-note kbd,.control-table kbd,.lesson-card kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid var(--line);
  border-radius: 3px;
  background: var(--surface-2);
  color: var(--text);
  font: 600 .9em var(--font);
  white-space: nowrap;
}

.topic-not-found {
  min-height: 55vh;
  padding-block: 90px;
}

.topic-not-found h1 {
  font-size: clamp(35px,5vw,54px);
  margin: 14px 0;
}

.topic-not-found p {
  color: var(--muted);
  max-width: 600px;
}

.control-card {
  margin-top: 12px;
}

.control-table-wrap {
  width: 100%;
  overflow-x: auto;
  margin: 16px 0;
  border: 1px solid var(--line);
  border-radius: 5px;
}

.control-table {
  width: 100%;
  min-width: 550px;
  border-collapse: collapse;
  text-align: left;
}

.control-table th,.control-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  font-size: 12px;
  line-height: 1.55;
}

.control-table th {
  background: var(--surface-2);
  color: var(--text);
  font-weight: 600;
}

.control-table td {
  color: var(--muted);
}

.control-table tr:last-child td {
  border-bottom: 0;
}

.control-table td:first-child {
  color: var(--text);
}

.lesson-card ol.steps-list {
  padding-left: 21px;
  margin: 8px 0 13px;
}

.lesson-card ol.steps-list li {
  padding-left: 3px;
  margin: 7px 0;
  font-size: 13px;
}

.lesson-card p,.lesson-card li {
  font-size: 13px;
}

.lesson-card h3 {
  font-size: 22px;
}

.lesson-tag {
  font-size: 9px;
}

.video-placeholder {
  aspect-ratio: 16/7;
  min-height: 200px;
}

.video-placeholder>a {
  padding: 9px 12px;
  border: 1px solid var(--line);
  border-radius: 4px;
}

.video-placeholder>a:hover {
  border-color: var(--gold);
}

@media(max-width:960px) {
  .topic-grid {
    grid-template-columns: repeat(3,minmax(0,1fr));
  }

  .topic-animation-card {
    grid-template-columns: 38px 1fr 148px;
    gap: 13px;
  }
}

@media(max-width:700px) {
  .topic-grid {
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 9px;
  }

  .topic-card {
    min-height: 158px;
    padding: 14px;
  }

  .topic-card strong {
    font-size: 14px;
  }

  .topic-hero {
    padding-top: 25px;
    padding-bottom: 45px;
  }

  .breadcrumbs {
    margin-bottom: 32px;
    flex-wrap: wrap;
  }

  .topic-hero-grid {
    grid-template-columns: 1fr 85px;
    gap: 12px;
  }

  .topic-hero-mark {
    width: 80px;
    height: 80px;
    font-size: 28px;
  }

  .topic-hero-grid p {
    font-size: 14px;
  }

  .topic-key-ideas {
    padding: 17px;
    margin-top: 24px;
  }

  .topic-key-ideas ul {
    display: grid;
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .topic-animations {
    padding: 51px 0 58px;
  }

  .topic-animation-card {
    grid-template-columns: 29px 1fr;
    gap: 10px;
    padding: 17px 0;
  }

  .topic-animation-index {
    font-size: 15px;
  }

  .topic-animation-copy h3 {
    font-size: 16px;
  }

  .topic-animation-copy p {
    font-size: 12px;
  }

  .blend-download {
    grid-column: 2;
    justify-content: flex-start;
    width: max-content;
    max-width: 100%;
    padding: 9px 11px;
    margin-top: 3px;
  }

  .blend-download b {
    margin-left: 8px;
  }

  .video-placeholder {
    aspect-ratio: auto;
    min-height: 155px;
  }

  .control-table {
    min-width: 540px;
  }

  .control-table th,.control-table td {
    padding: 8px;
  }

  .lesson-card p,.lesson-card li {
    font-size: 12px;
  }

  .lesson-card ol.steps-list li {
    font-size: 12px;
  }
}

.video-guide-note {
  margin: -20px 0 24px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}

.video-slot-label {
  justify-self: end;
  color: var(--gold);
  font-size: 10px;
  white-space: nowrap;
}

.youtube-embed {
  display: block;
  width: 100%;
  aspect-ratio: 16/9;
  margin: 12px 0 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #050a13;
}

@media(max-width:620px) {
  .video-slot-label {
    grid-column: 2;
    justify-self: start;
  }
}

/* Páginas de área, downloads, laboratório e materiais docentes */
.hero-actions { flex-wrap: wrap; gap: 14px 20px; }
.nav-account { color: var(--gold) !important; }
.path-section { padding-block: 76px; border-bottom: 1px solid var(--line); }
.learning-path { display: grid; grid-template-columns: repeat(5,1fr); gap: 0; padding: 0; margin: 34px 0 20px; list-style: none; }
.learning-path li { display: grid; gap: 5px; padding: 18px 14px; border-top: 1px solid var(--gold); border-bottom: 1px solid var(--line); }
.learning-path li+li { border-left: 1px solid var(--line); }
.learning-path li>span { color: var(--gold); font-size: 11px; }
.learning-path b { font: 600 16px var(--display); }
.learning-path small { color: var(--muted); line-height: 1.5; }
.feature-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 1px; margin-block: 24px 80px; background: var(--line); border: 1px solid var(--line); }
.feature-strip a { display: grid; gap: 7px; padding: 22px; background: var(--bg); transition: background .2s; }
.feature-strip a:hover { background: var(--surface); }
.feature-strip span,.lesson-tag { color: var(--gold); letter-spacing: .07em; }
.feature-strip span { font-size: 10px; }
.feature-strip b { font: 600 18px var(--display); }
.feature-strip small { color: var(--muted); line-height: 1.55; }
.portal-main,.tool-page,.resource-page,.research-page,.download-center { padding-top: 30px; padding-bottom: 82px; }
.portal-main .breadcrumbs,.tool-page .breadcrumbs,.resource-page .breadcrumbs,.research-page .breadcrumbs,.download-center .breadcrumbs { margin-bottom: 34px; }
.portal-heading { display: flex; justify-content: space-between; align-items: center; gap: 30px; padding: 12px 0 32px; }
.portal-heading h1,.tool-heading h1 { max-width: 850px; margin: 8px 0 13px; font: 600 clamp(36px,5vw,58px)/1.12 var(--display); letter-spacing: -.04em; }
.portal-heading h1 span,.tool-heading h1 span { color: var(--gold); }
.portal-heading p,.tool-heading>p { max-width: 700px; margin: 0; color: var(--muted); }
.demo-stamp { flex: none; padding: 15px 18px; border: 1px solid var(--gold); color: var(--gold); font-size: 10px; letter-spacing: .12em; line-height: 1.7; text-align: center; transform: rotate(3deg); }
.notice-card { margin-block: 23px; padding: 19px 22px; border-left: 3px solid var(--gold); background: var(--surface); color: var(--muted); }
.notice-card b { display: block; margin-bottom: 5px; color: var(--text); font: 600 15px var(--display); }
.notice-card p { max-width: 900px; margin: 0 0 8px; font-size: 13px; line-height: 1.75; }
.notice-card a { color: var(--gold); text-decoration: underline; text-underline-offset: 3px; }
.demo-entry,.account-roadmap { max-width: 760px; padding: 30px; margin-top: 36px; border: 1px solid var(--line); background: var(--surface); }
.demo-entry h2,.account-roadmap h2 { margin: 7px 0 19px; font: 600 22px var(--display); }
.demo-form { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; align-items: end; }
.demo-form label,.portal-form label,.downloads-tools label { display: grid; gap: 6px; color: var(--muted); font-size: 12px; }
.demo-form input,.demo-form select,.portal-form input,.portal-form select,.downloads-tools input,.downloads-tools select { width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; background: var(--bg); color: var(--text); font: inherit; }
.demo-form button { grid-column: 1/-1; justify-self: start; margin-top: 5px; }
.form-feedback { min-height: 1.5em; color: var(--gold); font-size: 12px; }
.account-roadmap { margin-top: 65px; background: transparent; }
.account-roadmap>p { color: var(--muted); font-size: 13px; }
.account-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.portal-dashboard { margin-top: 44px; scroll-margin-top: 100px; }
.dashboard-heading { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.dashboard-heading h2 { margin: 5px 0; font: 600 28px var(--display); }
.dashboard-heading p { margin: 0; color: var(--muted); font-size: 13px; }
.portal-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin: 22px 0; }
.portal-metrics article { display: grid; gap: 3px; padding: 18px; border: 1px solid var(--line); background: var(--surface); }
.portal-metrics b { color: var(--gold); font: 600 26px var(--display); }
.portal-metrics span { color: var(--muted); font-size: 12px; }
.portal-columns,.portal-admin-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 14px; margin-top: 16px; }
.portal-card,.portal-admin-grid article,.resource-card { padding: 22px; border: 1px solid var(--line); background: var(--surface); }
.portal-card h3,.portal-admin-grid h3,.resource-card h2 { margin: 5px 0 10px; font: 600 18px var(--display); }
.portal-card p,.portal-admin-grid p,.resource-card p,.resource-card li { color: var(--muted); font-size: 13px; line-height: 1.7; }
.portal-card .text-link,.portal-admin-grid .text-link { display: block; width: fit-content; margin-top: 13px; color: var(--gold); font-size: 12px; }
.portal-list { padding: 0; margin: 13px 0 4px; list-style: none; }
.portal-list li { display: flex; justify-content: space-between; align-items: baseline; gap: 10px; padding: 10px 0; border-top: 1px solid var(--line); font-size: 13px; }
.portal-list a { color: var(--text); text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; }
.portal-list span,.empty-inline { color: var(--muted); font-size: 11px; }
.portal-list .empty-inline { display: block; }
.course-checklist { display: grid; gap: 8px; padding-block: 5px; }
.progress-check { display: flex; gap: 10px; align-items: center; color: var(--muted); font-size: 12px; }
.progress-check input,.portal-card input[type=radio] { width: 18px; height: 18px; accent-color: var(--gold); }
#quick-activity { display: grid; gap: 9px; }
#quick-activity label { display: flex; gap: 9px; align-items: center; color: var(--muted); font-size: 13px; }
#quick-activity button { justify-self: start; margin-top: 7px; }
.portal-form { display: grid; gap: 12px; }
.portal-form button { justify-self: start; }
.portal-link-row,.resource-topic-links { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 17px; }
.achievement-list { display: grid; gap: 8px; margin-block: 13px; }
.achievement-list span { width: fit-content; padding: 6px 9px; border: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.achievement-list span.is-earned { border-color: var(--gold); color: var(--gold); }
.portal-link-row a,.resource-topic-links a { flex: 1; min-width: 230px; padding: 16px; border: 1px solid var(--line); color: var(--gold); font-size: 13px; }
.portal-link-row a span { float: right; }
.portal-admin-grid article { min-height: 185px; }
.portal-admin-grid .format-status { display: inline-block; }
.tool-heading { padding: 12px 0 30px; }
.tool-heading .button { margin-top: 20px; }
.experiment-panel,.model-panel { padding: 24px; margin-top: 20px; border: 1px solid var(--line); background: var(--surface); }
.experiment-title-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; }
.experiment-title-row h2,.model-panel h2 { margin: 5px 0; font: 600 22px var(--display); }
.live-readout { display: grid; text-align: right; color: var(--muted); font-size: 12px; }
.live-readout b { color: var(--gold); font-size: 15px; }
.simulation-stage { height: 255px; margin: 18px 0; padding: 10px; border: 1px solid var(--line); background: var(--bg); }
#motion-canvas { display: block; width: 100%; height: 100%; }
.experiment-controls { display: grid; grid-template-columns: 1fr 1fr auto; gap: 20px; align-items: end; }
.experiment-controls>label { display: grid; grid-template-columns: 1fr auto; gap: 8px; color: var(--muted); font-size: 12px; }
.experiment-controls output { color: var(--gold); }
.experiment-controls input[type=range] { grid-column: 1/-1; width: 100%; accent-color: var(--gold); }
.experiment-buttons { display: flex; flex-wrap: wrap; gap: 8px; }
.equation-note { padding: 15px 0 0; margin-top: 17px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.equation-note strong,.equation-note span { color: var(--text); }
.equation-note span { padding-inline: 6px; color: var(--gold); font-family: var(--display); }
.equation-note p { margin: 7px 0 0; }
.model-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; margin-top: 42px; }
.model-panel p { color: var(--muted); font-size: 13px; }
.view-controls { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.view-controls button { min-height: 42px; padding: 8px 14px; border: 1px solid var(--line); border-radius: 4px; background: transparent; color: var(--text); cursor: pointer; }
.view-controls button[aria-pressed=true] { border-color: var(--gold); color: var(--gold); }
.cube-stage { display: grid; place-items: center; min-height: 275px; overflow: hidden; border: 1px solid var(--line); background: radial-gradient(circle,var(--surface-2),var(--bg)); perspective: 750px; }
.cube { position: relative; width: 130px; height: 130px; transform-style: preserve-3d; transform: rotateX(0) rotateY(0); transition: transform .55s ease; }
.cube-face { position: absolute; display: grid; place-items: center; width: 130px; height: 130px; border: 1px solid var(--gold); background: color-mix(in srgb,var(--gold) 24%,transparent); color: var(--text); font-size: 11px; letter-spacing: .1em; backface-visibility: visible; }
.cube-front { transform: translateZ(65px); }.cube-back { transform: rotateY(180deg) translateZ(65px); }.cube-right { transform: rotateY(90deg) translateZ(65px); }.cube-left { transform: rotateY(-90deg) translateZ(65px); }.cube-top { transform: rotateX(90deg) translateZ(65px); }.cube-bottom { transform: rotateX(-90deg) translateZ(65px); }
.download-summary { margin: 5px 0 20px; color: var(--gold); font-size: 15px; }.download-summary strong { font: 600 25px var(--display); }.download-summary span { color: var(--muted); font-size: 12px; }
.topic-search { display: grid; grid-template-columns: minmax(220px,440px) 1fr; gap: 16px; align-items: end; margin: 22px 0; }
.topic-search label { display: grid; gap: 6px; color: var(--muted); font-size: 12px; }
.topic-search input { width: 100%; min-height: 46px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; background: var(--surface); color: var(--text); font: inherit; }
.topic-search span { min-height: 22px; color: var(--gold); font-size: 12px; }
[hidden] { display: none !important; }
.downloads-tools { display: grid; grid-template-columns: 1.2fr 1fr auto; gap: 13px; align-items: end; padding: 18px; border: 1px solid var(--line); background: var(--surface); }
.downloads-tools .button { min-height: 46px; }
.download-results { margin-top: 20px; border-top: 1px solid var(--line); }
.download-result { display: grid; grid-template-columns: 160px 1fr auto; gap: 18px; align-items: center; padding: 16px 4px; border-bottom: 1px solid var(--line); }
.download-result-topic { color: var(--gold); font-size: 11px; }
.download-result h2 { margin: 0 0 3px; font: 600 15px var(--display); }
.download-result p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.5; }
.download-button { display: inline-flex; align-items: center; gap: 7px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; font-size: 12px; white-space: nowrap; }
.download-button:hover { border-color: var(--gold); color: var(--gold); }
.download-button b { color: var(--gold); }
.empty-state { padding: 22px; color: var(--muted); text-align: center; }
.format-roadmap { padding: 42px 0; margin-top: 40px; border-top: 1px solid var(--line); }
.format-roadmap h2 { margin: 5px 0 20px; font: 600 23px var(--display); }
.format-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
.format-grid article { min-height: 155px; padding: 18px; border: 1px solid var(--line); background: var(--surface); }
.format-grid h3 { margin: 12px 0 5px; font: 600 16px var(--display); }
.format-grid p { margin: 0; color: var(--muted); font-size: 12px; }
.format-status { color: var(--gold); font-size: 9px; letter-spacing: .1em; }.format-status.planned { color: var(--muted); }
.resource-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; margin-top: 27px; }
.resource-card h2 { margin-top: 10px; }.resource-card ol,.resource-card ul { padding-left: 20px; }
.teacher-prompt { padding: 13px; border-left: 2px solid var(--gold); background: var(--bg); }
.resource-library-heading { margin-top: 55px; padding-top: 28px; border-top: 1px solid var(--line); }
.research-sections { margin-top: 35px; border-top: 1px solid var(--line); }
.research-sections article { display: grid; grid-template-columns: 58px 1fr; gap: 15px; padding: 23px 0; border-bottom: 1px solid var(--line); }
.research-sections article>span { color: var(--gold); font: 400 19px var(--display); }
.research-sections h2 { margin: 0 0 8px; font: 600 19px var(--display); }
.research-sections p,.research-sections li { color: var(--muted); font-size: 13px; line-height: 1.75; }
.research-placeholder { display: inline-block; padding: 7px 10px; border: 1px dashed var(--line); font-size: 11px !important; }
.animation-detail-page { padding-top: 30px; padding-bottom: 80px; }
.animation-detail-page .breadcrumbs { margin-bottom: 35px; flex-wrap: wrap; }
.animation-detail-hero { padding: 12px 0 32px; }
.animation-detail-hero h1 { max-width: 900px; margin: 8px 0 12px; font: 600 clamp(34px,5vw,56px)/1.15 var(--display); letter-spacing: -.04em; }
.animation-detail-hero>p { max-width: 780px; color: var(--muted); }
.animation-meta { display: flex; flex-wrap: wrap; gap: 9px; margin: 20px 0; }
.animation-meta span { padding: 6px 9px; border: 1px solid var(--line); color: var(--muted); font-size: 11px; }
.animation-watch,.animation-science,.animation-files { padding: 30px 0; margin-top: 15px; border-top: 1px solid var(--line); }
.animation-watch h2,.animation-science h2,.animation-files h2 { margin: 6px 0 17px; font: 600 23px var(--display); }
.watch-placeholder { display: grid; grid-template-columns: 75px 1fr; gap: 18px; align-items: center; min-height: 210px; padding: 28px; border: 1px dashed var(--line); background: var(--surface); }
.watch-symbol { display: grid; place-items: center; width: 58px; height: 58px; border: 1px solid var(--gold); border-radius: 50%; color: var(--gold); font-size: 19px; }
.watch-placeholder b { font: 600 16px var(--display); }
.watch-placeholder p { max-width: 750px; color: var(--muted); font-size: 13px; }
.watch-placeholder .button { margin-top: 5px; }
.animation-science { display: grid; grid-template-columns: 1.2fr 1fr; gap: 36px; }
.animation-science article>p,.animation-science li { color: var(--muted); font-size: 13px; line-height: 1.75; }
.animation-science ul { padding-left: 20px; }
.animation-backlinks { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 14px; margin-top: 24px; padding-top: 17px; border-top: 1px solid var(--line); }
.animation-backlinks a { color: var(--gold); font-size: 13px; }
.concept-details { margin: 7px 0 10px; color: var(--muted); font-size: 12px; }
.concept-details summary { width: fit-content; color: var(--gold); cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.concept-details ul { padding-left: 20px; }
.animation-actions { display: grid; gap: 8px; }
.favorite-toggle { min-height: 40px; padding: 8px 10px; border: 1px solid var(--line); border-radius: 4px; background: transparent; color: var(--text); font-size: 11px; cursor: pointer; }
.favorite-toggle[aria-pressed=true] { border-color: var(--gold); color: var(--gold); }
.topic-animation-card { scroll-margin-top: 95px; }
@media(max-width:850px) {
  .learning-path { grid-template-columns: repeat(3,1fr); }
  .learning-path li:nth-child(4) { border-left: 0; }
  .downloads-tools { grid-template-columns: 1fr 1fr; }
  .downloads-tools .button { grid-column: 1/-1; justify-self: start; }
  .download-result { grid-template-columns: 120px 1fr auto; }
  .experiment-controls { grid-template-columns: 1fr 1fr; }
  .experiment-buttons { grid-column: 1/-1; }
}
@media(max-width:620px) {
  .section-wrap.portal-main,.section-wrap.tool-page,.section-wrap.resource-page,.section-wrap.research-page,.section-wrap.download-center { width: calc(100% - 38px); }
  .portal-heading { align-items: flex-start; }
  .demo-stamp { padding: 8px; font-size: 8px; }
  .demo-entry,.account-roadmap { padding: 20px; }
  .demo-form,.portal-columns,.portal-admin-grid,.resource-grid,.model-panel { grid-template-columns: 1fr; }
  .demo-form button { grid-column: auto; }
  .dashboard-heading { align-items: flex-start; flex-direction: column; }
  .portal-metrics { gap: 7px; }
  .portal-metrics article { padding: 12px; }
  .portal-metrics b { font-size: 21px; }
  .portal-list li { align-items: flex-start; flex-direction: column; gap: 2px; }
  .learning-path { grid-template-columns: repeat(2,1fr); }
  .learning-path li:nth-child(odd) { border-left: 0; }
  .learning-path li:nth-child(even) { border-left: 1px solid var(--line); }
  .feature-strip { grid-template-columns: 1fr; }
  .downloads-tools { grid-template-columns: 1fr; }
  .topic-search { grid-template-columns: 1fr; gap: 6px; }
  .downloads-tools .button { grid-column: auto; }
  .download-result { grid-template-columns: 1fr auto; gap: 6px 10px; }
  .download-result-topic { grid-column: 1/-1; }
  .download-result .download-button { grid-column: 1/-1; justify-self: start; margin-top: 5px; }
  .format-grid { grid-template-columns: 1fr 1fr; }
  .experiment-panel,.model-panel { padding: 17px; }
  .experiment-title-row { align-items: flex-start; flex-direction: column; }
  .live-readout { display: flex; width: 100%; justify-content: space-between; text-align: left; }
  .simulation-stage { height: 205px; }
  .experiment-controls { grid-template-columns: 1fr; }
  .experiment-buttons { grid-column: auto; }
  .cube-stage { min-height: 230px; }
  .research-sections article { grid-template-columns: 34px 1fr; gap: 10px; }
  .animation-science { grid-template-columns: 1fr; gap: 15px; }
  .watch-placeholder { grid-template-columns: 1fr; padding: 19px; }
  .animation-actions { grid-column: 2; grid-template-columns: 1fr 1fr; }
  .favorite-toggle { font-size: 10px; }
}
@media(prefers-reduced-motion:reduce) {
  .cube { transition: none; }
}
@media print {
  .site-header,.site-footer,.skip-link,.button,.theme-toggle,.menu-toggle { display: none !important; }
  body { background: #fff; color: #111; font-size: 11pt; }
  .resource-page { width: 100%; padding: 0; }
  .resource-card,.notice-card { break-inside: avoid; color: #111; background: #fff; }
  .resource-card p,.resource-card li,.notice-card p { color: #333; }
}

/* Conta autenticada, roteamento protegido e políticas de conteúdo */
.auth-page { min-height: 65vh; padding-top: 42px; padding-bottom: 80px; }
.auth-card { width: min(100%,760px); padding: 27px; margin: 14px auto 24px; border: 1px solid var(--line); background: var(--surface); }
.auth-card h1,.auth-page h1 { margin: 8px 0 12px; font: 600 clamp(28px,4vw,42px)/1.2 var(--display); letter-spacing: -.03em; }
.auth-card h2,.account-section h2,.staff-workspace h2 { margin: 7px 0 18px; font: 600 22px var(--display); }
.auth-card>p,.auth-lede { color: var(--muted); font-size: 14px; }
.auth-back { display: inline-block; margin-bottom: 20px; color: var(--gold); font-size: 12px; }
.auth-form { display: grid; gap: 10px; margin-top: 20px; }
.auth-form>label:not(.consent-check),.inline-form>label,.submission-form>label,.admin-form>label { color: var(--muted); font-size: 12px; }
.auth-form input:not([type=checkbox]),.auth-form textarea,.auth-form select,.inline-form input,.submission-form textarea,.submission-form input,.admin-form input,.admin-form textarea,.admin-form select { display: block; width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 4px; background: var(--bg); color: var(--text); font: inherit; }
.auth-form textarea,.submission-form textarea,.admin-form textarea { resize: vertical; }
.auth-form small { margin-top: -7px; color: var(--muted); font-size: 11px; }
.auth-form button,.auth-form .button { justify-self: start; margin-top: 9px; }
.auth-form [readonly] { opacity: .75; }
.consent-check { display: flex; align-items: flex-start; gap: 10px; margin: 10px 0; color: var(--muted); font-size: 12px; }
.consent-check input { flex: none; width: 18px; height: 18px; margin: 1px 0 0; accent-color: var(--gold); }
.consent-check a,.auth-links a,.auth-notice a { color: var(--gold); text-decoration: underline; text-underline-offset: 3px; }
.auth-links { display: flex; flex-wrap: wrap; gap: 18px; margin: 17px 0; font-size: 12px; }
.auth-links a { color: var(--gold); }
.auth-message { min-height: 1.5em; color: var(--gold); font-size: 12px; }
.auth-message[data-state=error] { color: #ef8a8a; }
.auth-notice,.auth-note { margin: 18px 0; padding: 16px 18px; border-left: 3px solid var(--gold); background: var(--bg-soft); color: var(--muted); font-size: 13px; }
.auth-notice strong,.auth-note strong { color: var(--text); }
.auth-notice p,.auth-note p { margin: 6px 0; }
.auth-notice code { overflow-wrap: anywhere; }
.dashboard-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 18px; padding: 12px 0 23px; border-bottom: 1px solid var(--line); }
.dashboard-heading p { max-width: 750px; color: var(--muted); font-size: 13px; }
.dashboard-heading h1 { margin: 5px 0; }
.account-shortcuts { display: flex; flex-wrap: wrap; gap: 9px; margin: 18px 0 24px; }
.account-shortcuts a { padding: 10px 13px; border: 1px solid var(--line); color: var(--gold); font-size: 12px; }
.dashboard-cards { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; margin: 20px 0 35px; }
.dashboard-cards article { display: grid; gap: 5px; padding: 17px; border: 1px solid var(--line); background: var(--surface); }
.dashboard-cards b { color: var(--gold); font: 600 24px var(--display); }
.dashboard-cards span { color: var(--muted); font-size: 11px; }
.account-section { padding: 28px 0; border-top: 1px solid var(--line); }
.account-section>p { color: var(--muted); font-size: 13px; }
.db-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.db-card { padding: 17px; border: 1px solid var(--line); background: var(--surface); }
.db-card h3 { margin: 5px 0 7px; font: 600 17px var(--display); }
.db-card p { color: var(--muted); font-size: 12px; line-height: 1.6; }
.db-card-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.db-card-actions a,.db-card-actions button { min-height: 39px; padding: 8px 11px; border: 1px solid var(--line); background: transparent; color: var(--text); font: inherit; font-size: 11px; cursor: pointer; }
.db-card-actions button[aria-pressed=true] { border-color: var(--gold); color: var(--gold); }
.private-list { display: grid; gap: 0; padding: 0; margin: 14px 0; list-style: none; }
.private-list>li { display: flex; align-items: center; justify-content: space-between; gap: 13px; padding: 12px 0; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.private-list a { color: var(--text); text-decoration: underline; text-decoration-color: var(--gold); text-underline-offset: 3px; }
.private-list small { color: var(--subtle); }
.inline-form { display: grid; grid-template-columns: 1fr auto; gap: 9px; align-items: end; }
.inline-form label { grid-column: 1/-1; }
.inline-form input { grid-column: 1; }
.inline-form button { grid-column: 2; grid-row: 2; }
.submission-form { display: grid; gap: 8px; margin-top: 13px; }
.submission-form button { justify-self: start; }
.staff-workspace { margin-top: 18px; }
.staff-grid { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; }
.staff-grid .auth-card { width: 100%; margin: 0; }
.staff-grid .auth-form { margin-top: 12px; }
.submission-list { display: grid; gap: 10px; }
.submission-row { padding: 17px; border: 1px solid var(--line); background: var(--surface); }
.submission-row>b,.submission-row>span { display: block; }
.submission-row>span { margin: 5px 0; color: var(--muted); font-size: 11px; }
.submission-row>p { overflow-wrap: anywhere; font-size: 13px; }
.submission-row form { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: end; }
.submission-row form label { color: var(--muted); font-size: 11px; }
.privacy-note { color: var(--muted); font-size: 11px !important; }
.admin-form { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 12px; align-items: end; padding: 17px; margin-bottom: 17px; border: 1px solid var(--line); background: var(--surface); }
.admin-form .wide-field { grid-column: 1/-1; }
.admin-form button { justify-self: start; }
.table-scroll { width: 100%; overflow-x: auto; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 12px; }
.admin-table th,.admin-table td { padding: 11px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.admin-table th { color: var(--gold); font-weight: 600; }
.admin-table td { color: var(--muted); }
.admin-table button { padding: 6px 8px; border: 1px solid var(--line); background: transparent; color: var(--text); cursor: pointer; }
.admin-table button:hover { border-color: var(--gold); color: var(--gold); }
.legal-page { padding-top: 30px; padding-bottom: 80px; }
.legal-copy { max-width: 850px; padding: 28px; margin: auto; border: 1px solid var(--line); background: var(--surface); }
.legal-copy h1 { margin: 8px 0 22px; font: 600 clamp(32px,5vw,48px) var(--display); }
.legal-copy h2 { margin: 26px 0 6px; font: 600 18px var(--display); }
.legal-copy p,.legal-copy li { color: var(--muted); font-size: 13px; line-height: 1.8; }
.legal-copy strong { color: var(--text); }
button:disabled { opacity: .6; cursor: wait; }
@media(max-width:700px) {
  .auth-card { padding: 20px; }
  .dashboard-heading { flex-direction: column; }
  .dashboard-cards { grid-template-columns: repeat(2,minmax(0,1fr)); }
  .db-grid,.staff-grid { grid-template-columns: 1fr; }
  .admin-form { grid-template-columns: 1fr; }
  .admin-form .wide-field { grid-column: auto; }
  .submission-row form { grid-template-columns: 1fr; }
  .inline-form { grid-template-columns: 1fr; }
  .inline-form button,.inline-form input { grid-column: 1; grid-row: auto; }
  .private-list>li { align-items: flex-start; flex-direction: column; }
}
.learn-shortcuts {
  position: absolute;
  top: 102px;
  right: 5%;
  width: min(300px, 35%);
  padding: 19px 21px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}
.learn-shortcuts h2 {
  margin: 0 0 9px;
  font: 600 13px var(--display);
}
.learn-shortcuts > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 9px 0;
  border-top: 1px solid var(--line);
}
.learn-shortcuts kbd {
  padding: 3px 6px;
  border: 1px solid var(--line);
  border-radius: 3px;
  color: var(--text);
  font-size: 10px;
  white-space: nowrap;
}
.learn-shortcuts span {
  color: var(--muted);
  font-size: 10px;
  text-align: right;
}
@media(max-width:850px) {
  .learn-shortcuts {
    position: static;
    width: min(100%, 380px);
    margin-top: 30px;
  }
}

.animation-video { display:block; width:min(100%, 70rem); aspect-ratio:16/9; background:#02050c; border:1px solid var(--line, rgba(255,255,255,.16)); border-radius:1rem; }
.animation-detail-hero { padding-block:2rem; }
.animation-video-panel { display:grid; gap:1rem; padding-block:2rem; }
.profile-avatar-editor { display:flex; align-items:center; gap:1.2rem; padding:1rem 0 1.5rem; border-bottom:1px solid var(--line); }
.profile-avatar-editor>div { display:grid; gap:.55rem; }
.profile-avatar { width:112px; height:112px; flex:none; border-radius:50%; object-fit:cover; background:var(--surface); border:2px solid var(--accent); }
.profile-avatar-editor small,.form-help { color:var(--muted); font-size:.88rem; line-height:1.5; }
.profile-avatar-editor .button { justify-self:start; }
.nav-signout { color:inherit; font:inherit; cursor:pointer; border:1px solid var(--line); border-radius:999px; padding:.6rem .9rem; background:transparent; }
.nav-signout:hover { border-color:var(--accent); }
@media(max-width:520px) { .profile-avatar-editor { align-items:flex-start; flex-direction:column; } }