:root {
  --ink: #eef5ff;
  --muted: #9bb3d1;
  --faint: #6d89ab;
  --accent: #2fa3ff;
  --accent-2: #7cc8ff;
  --line: rgba(160, 205, 255, 0.14);
  --card: linear-gradient(160deg, rgba(255, 255, 255, 0.075), rgba(255, 255, 255, 0.022));
  --depth: 0;
  --font: "Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --wrap: 72rem;
  --r: 22px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  background: #031330;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--ink);
  background: transparent;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img,
svg,
canvas {
  display: block;
}

img {
  max-width: 100%;
  height: auto;
}

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

button {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
  border-radius: 6px;
}

.skip {
  position: fixed;
  left: -9999px;
  top: 0.5rem;
  z-index: 100;
  padding: 0.6rem 1rem;
  background: #fff;
  color: #06204a;
  border-radius: 8px;
}

.skip:focus {
  left: 0.5rem;
}

.wrap {
  width: min(100% - 2.5rem, var(--wrap));
  margin-inline: auto;
}

/* ---------- Ocean backdrop ---------- */

.sea {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: linear-gradient(180deg, #0c5399 0%, #08407f 28%, #062c5d 62%, #041c3f 100%);
}

.sea-deep {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, #03142e 0%, #020d20 100%);
  opacity: var(--depth);
  will-change: opacity;
}

.sea-glow {
  position: absolute;
  inset: -20% -10% auto;
  height: 90%;
  background: radial-gradient(ellipse 60% 55% at 50% 0%, rgba(120, 200, 255, 0.5), transparent 70%);
  opacity: calc(1 - var(--depth) * 1.35);
}

.rays {
  position: absolute;
  inset: -10% -20% 20% -20%;
  background: repeating-linear-gradient(
    100deg,
    transparent 0 90px,
    rgba(160, 220, 255, 0.07) 130px,
    transparent 190px 260px
  );
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 75%);
  mask-image: linear-gradient(180deg, #000, transparent 75%);
  opacity: calc(1 - var(--depth) * 1.6);
  transform-origin: 50% 0;
  animation: sway 14s ease-in-out infinite alternate;
}

@keyframes sway {
  from {
    transform: rotate(-2.5deg) translateX(-2%);
  }
  to {
    transform: rotate(2.5deg) translateX(2%);
  }
}

.snow i {
  position: absolute;
  top: -10px;
  border-radius: 50%;
  background: rgba(190, 228, 255, 0.55);
  animation: drift linear infinite;
  will-change: transform;
}

@keyframes drift {
  to {
    transform: translate3d(var(--x, 20px), 110vh, 0);
  }
}

/* ---------- Header ---------- */

.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1rem clamp(1.25rem, 4vw, 3rem);
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease), padding 0.4s var(--ease);
}

.top.is-stuck {
  padding-block: 0.65rem;
  background: rgba(4, 22, 52, 0.62);
  -webkit-backdrop-filter: blur(16px) saturate(1.3);
  backdrop-filter: blur(16px) saturate(1.3);
  box-shadow: 0 1px 0 var(--line);
}

.brand {
  display: block;
  line-height: 0;
}

.brand img {
  height: 2.1rem;
  width: auto;
}

.nav {
  display: flex;
  gap: 0.25rem;
  margin-left: auto;
}

.nav a {
  position: relative;
  padding: 0.5rem 0.9rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
  border-radius: 999px;
  transition: color 0.25s, background 0.25s;
}

.nav a:hover,
.nav a.is-active {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.07);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.5rem;
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  border-radius: 999px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), background 0.3s, border-color 0.3s;
}

.btn-small {
  padding: 0.65rem 1.1rem;
  font-size: 0.85rem;
}

.btn-primary {
  color: #03142e;
  background: linear-gradient(135deg, #8fd2ff, #2fa3ff);
  box-shadow: 0 6px 24px -6px rgba(47, 163, 255, 0.65);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 32px -6px rgba(47, 163, 255, 0.85);
}

.btn-primary svg {
  transition: transform 0.3s var(--ease);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line);
  color: var(--ink);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(160, 205, 255, 0.35);
  transform: translateY(-2px);
}

/* ---------- Depth gauge ---------- */

.gauge {
  position: fixed;
  right: clamp(0.9rem, 2vw, 1.75rem);
  top: 50%;
  z-index: 40;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
  height: min(46vh, 22rem);
  pointer-events: none;
}

.gauge-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

.gauge-rail {
  position: relative;
  flex: 1;
  width: 2px;
  margin-right: 0.35rem;
  border-radius: 2px;
  background: rgba(160, 205, 255, 0.18);
}

.gauge-ticks {
  position: absolute;
  inset: 0 auto 0 -7px;
  width: 16px;
  background: repeating-linear-gradient(180deg, rgba(160, 205, 255, 0.35) 0 1px, transparent 1px 10%);
  -webkit-mask-image: linear-gradient(90deg, transparent 0 6px, #000 6px);
  mask-image: linear-gradient(90deg, transparent 0 6px, #000 6px);
}

.gauge-marker {
  position: absolute;
  top: 0;
  right: -0.35rem;
  transform: translateY(calc(var(--p, 0) * 1px));
  will-change: transform;
}

.gauge-marker::before {
  content: "";
  position: absolute;
  right: 0;
  top: -5px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 0 4px rgba(124, 200, 255, 0.2), 0 0 18px rgba(124, 200, 255, 0.8);
}

.gauge-marker span {
  position: absolute;
  right: 1.2rem;
  top: -0.7rem;
  font-size: 0.8rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
  color: var(--ink);
}

@media (max-width: 1100px) {
  .gauge {
    display: none;
  }
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 7rem 0 9rem;
  overflow: hidden;
}

.hero-emblem {
  position: absolute;
  right: clamp(-6rem, 3vw, 4rem);
  top: 50%;
  width: clamp(18rem, 44vw, 38rem);
  height: auto;
  opacity: 0.2;
  transform: translate3d(0, calc(-50% + var(--py, 0px)), 0);
  filter: drop-shadow(0 0 60px rgba(47, 163, 255, 0.45));
  -webkit-mask-image: radial-gradient(circle, #000 55%, transparent 72%);
  mask-image: radial-gradient(circle, #000 55%, transparent 72%);
  animation: bob 9s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes bob {
  from {
    margin-top: -0.8rem;
  }
  to {
    margin-top: 0.8rem;
  }
}

.hero-inner {
  position: relative;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.5rem;
  padding: 0.4rem 0.9rem 0.4rem 0.7rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: rgba(47, 163, 255, 0.1);
  border: 1px solid rgba(124, 200, 255, 0.22);
  border-radius: 999px;
}

.eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-2);
  box-shadow: 0 0 10px var(--accent-2);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    opacity: 0.35;
    transform: scale(0.7);
  }
}

.hero-title {
  text-wrap: balance;
  margin: 0;
  max-width: 22ch;
  font-size: clamp(2.3rem, 5.6vw, 4.8rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.035em;
}

.grad {
  display: block;
  padding-bottom: 0.14em;
  margin-bottom: -0.14em;
  background: linear-gradient(95deg, #ffffff 0%, #9ad8ff 55%, #3aa8ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lead {
  max-width: 38rem;
  margin: 1.75rem 0 0;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.65;
  color: var(--muted);
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2.25rem;
}

.hero-in {
  opacity: 1;
}

.js .hero-in {
  opacity: 0;
  transform: translateY(26px);
  animation: rise 1s var(--ease) forwards;
  animation-delay: calc(0.15s + var(--i, 0) * 0.12s);
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

.waves {
  position: absolute;
  inset: auto 0 0;
  height: clamp(5rem, 14vw, 9rem);
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 35%, transparent 98%);
  mask-image: linear-gradient(180deg, #000 0%, #000 35%, transparent 98%);
}

.wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 100%;
  animation: flow linear infinite;
  will-change: transform;
}

.wave path {
  fill: #fff;
}

.w1 {
  opacity: 0.05;
  animation-duration: 38s;
}

.w2 {
  opacity: 0.07;
  animation-duration: 26s;
  animation-direction: reverse;
}

.w3 {
  opacity: 0.1;
  animation-duration: 18s;
  height: 80%;
}

@keyframes flow {
  to {
    transform: translate3d(-50%, 0, 0);
  }
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 1.6rem;
  width: 26px;
  height: 42px;
  margin-left: -13px;
  border: 1.5px solid rgba(190, 225, 255, 0.5);
  border-radius: 14px;
  opacity: 0.8;
}

.scroll-cue span {
  position: absolute;
  left: 50%;
  top: 8px;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  border-radius: 2px;
  background: var(--accent-2);
  animation: cue 1.8s var(--ease) infinite;
}

@keyframes cue {
  0% {
    opacity: 0;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    transform: translateY(14px);
  }
}

/* ---------- Sections ---------- */

.section {
  position: relative;
  padding: clamp(5rem, 11vw, 9rem) 0;
}

.section-last {
  padding-bottom: clamp(5rem, 10vw, 8rem);
}

.kicker {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-2);
}

.h2 {
  text-wrap: balance;
  margin: 0;
  max-width: 20ch;
  font-size: clamp(2rem, 4.6vw, 3.6rem);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.h3 {
  margin: 0 0 0.6rem;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.015em;
}

.sub {
  max-width: 44rem;
  margin: 1.25rem 0 0;
  font-size: clamp(1.02rem, 1.4vw, 1.18rem);
  color: var(--muted);
}

.muted {
  margin: 0;
  color: var(--muted);
}

/* Reveal on scroll */
.js .reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
  transition-delay: calc(var(--d, 0) * 0.09s);
}

.js .reveal.in {
  opacity: 1;
  transform: none;
}

/* ---------- Cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 1.1rem;
  margin-top: clamp(2.5rem, 5vw, 4rem);
}

.card {
  position: relative;
  padding: 1.9rem 1.7rem 2rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color 0.4s, transform 0.5s var(--ease);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(22rem circle at var(--mx, 50%) var(--my, 0%), rgba(100, 190, 255, 0.16), transparent 60%);
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}

.card:hover {
  border-color: rgba(160, 205, 255, 0.34);
}

.card:hover::before {
  opacity: 1;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  margin-bottom: 1.4rem;
  color: var(--accent-2);
  background: rgba(47, 163, 255, 0.12);
  border: 1px solid rgba(124, 200, 255, 0.22);
  border-radius: 14px;
}

.card h3 {
  margin: 0 0 0.6rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
}

.disciplines {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.disciplines li {
  padding: 0.55rem 1.1rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line);
  border-radius: 999px;
}

/* ---------- Viewer stage ---------- */

.stage {
  position: relative;
  margin-top: clamp(2rem, 4vw, 3rem);
  aspect-ratio: 16 / 9;
  min-height: 22rem;
  max-height: 44rem;
  border: 1px solid var(--line);
  border-radius: 28px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 55% 50% at 50% 42%, rgba(47, 163, 255, 0.26), transparent 70%),
    linear-gradient(180deg, #0a3263 0%, #051a38 100%);
  box-shadow: 0 40px 80px -40px rgba(0, 0, 0, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.07);
  touch-action: pan-y;
  user-select: none;
  -webkit-user-select: none;
}

.stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  cursor: grab;
  outline: none;
  opacity: 0;
  transition: opacity 0.9s var(--ease);
}

.stage.is-ready canvas {
  opacity: 1;
}

.stage canvas:active {
  cursor: grabbing;
}

.stage-poster {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 3rem;
  opacity: 0.35;
  transition: opacity 0.6s;
}

.stage-poster img {
  max-height: 100%;
  object-fit: contain;
  mix-blend-mode: multiply;
}

.stage.is-ready .stage-poster {
  opacity: 0;
}

.stage.is-failed .stage-poster {
  opacity: 1;
}

.loader {
  position: absolute;
  inset: 0;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.9rem;
  pointer-events: none;
  transition: opacity 0.6s, visibility 0.6s;
}

.stage.is-ready .loader,
.stage.is-failed .loader {
  opacity: 0;
  visibility: hidden;
}

.loader-ring {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid rgba(124, 200, 255, 0.2);
  border-top-color: var(--accent-2);
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.loader-text {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.loader-track {
  width: min(14rem, 60%);
  height: 3px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.12);
  overflow: hidden;
}

.loader-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  transition: width 0.2s;
}

.loader-track span.is-indeterminate {
  width: 35%;
  animation: slide 1.1s ease-in-out infinite;
}

@keyframes slide {
  from {
    transform: translateX(-120%);
  }
  to {
    transform: translateX(320%);
  }
}

.stage-hint {
  position: absolute;
  z-index: 3;
  top: 1.1rem;
  left: 0;
  right: 0;
  margin: 0;
  text-align: center;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--muted);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s 0.3s;
}

.stage.is-ready .stage-hint {
  opacity: 0.85;
}

.stage-bar {
  position: absolute;
  z-index: 4;
  inset: auto 0 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1rem;
  padding: 1rem 1.1rem;
  background: linear-gradient(0deg, rgba(3, 16, 38, 0.82), transparent);
  pointer-events: none;
}

.chips,
.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  pointer-events: auto;
}

.chip,
.tool {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.9rem;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1;
  color: var(--ink);
  background: rgba(8, 28, 60, 0.7);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: background 0.25s, border-color 0.25s, opacity 0.25s;
}

.chip i {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--c);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.18);
  transition: opacity 0.25s;
}

.chip:hover,
.tool:hover {
  background: rgba(30, 80, 140, 0.7);
  border-color: rgba(160, 205, 255, 0.4);
}

.chip[aria-pressed="false"] {
  opacity: 0.5;
}

.chip[aria-pressed="false"] i {
  opacity: 0.35;
}

.tool[aria-pressed="true"] {
  background: rgba(47, 163, 255, 0.28);
  border-color: rgba(124, 200, 255, 0.5);
}

/* ---------- Stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.1rem;
  margin: 1.5rem 0 0;
}

.stat {
  padding: 1.5rem 1.4rem 1.6rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--r);
}

.stat dt {
  order: 2;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  line-height: 1.4;
  color: var(--muted);
}

.stat dd {
  order: 1;
  margin: 0;
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat b {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(180deg, #fff, #8fd0ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat small {
  margin-left: 0.3rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-2);
}

@media (max-width: 860px) {
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ---------- TRL ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.4fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  margin-top: clamp(3.5rem, 7vw, 6rem);
  align-items: start;
}

@media (max-width: 860px) {
  .split {
    grid-template-columns: 1fr;
  }
}

.trl {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.trl li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 0.5rem 1.25rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.trl-name {
  font-weight: 600;
}

.trl-bar {
  display: flex;
  gap: 4px;
}

.trl-bar i {
  width: clamp(0.9rem, 2.2vw, 1.5rem);
  height: 0.5rem;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.1);
  transition: background 0.5s var(--ease), box-shadow 0.5s var(--ease);
  transition-delay: calc(var(--k, 0) * 0.07s + 0.25s);
}

.trl li.in .trl-bar i.on {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 12px rgba(47, 163, 255, 0.55);
}

.trl-val {
  min-width: 3.6rem;
  text-align: right;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-2);
  font-variant-numeric: tabular-nums;
}

@media (max-width: 560px) {
  .trl li {
    grid-template-columns: 1fr auto;
  }
  .trl-bar {
    grid-column: 1 / -1;
    grid-row: 2;
  }
  .trl-bar i {
    flex: 1;
    width: auto;
  }
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
}

/* ---------- Contact ---------- */

.contact .h2 {
  max-width: 18ch;
}

.mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem 1.25rem;
  margin: clamp(2rem, 4vw, 3rem) 0 1.25rem;
}

.mail-link {
  font-size: clamp(1.9rem, 6vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.1;
  background: linear-gradient(95deg, #fff 10%, #7cc8ff 60%, #2fa3ff);
  background-size: 200% 100%;
  background-position: 0 0;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  transition: background-position 0.6s var(--ease);
}

.mail-link:hover {
  background-position: 100% 0;
}

.copy {
  padding: 0.65rem 1.1rem;
  font-size: 0.85rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.25s, border-color 0.25s;
}

.copy:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(160, 205, 255, 0.4);
}

.copy.is-done {
  color: #03142e;
  background: var(--accent-2);
  border-color: transparent;
}

/* ---------- Footer ---------- */

.foot {
  border-top: 1px solid var(--line);
  background: rgba(2, 10, 24, 0.55);
}

.foot-in {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  padding: 1.5rem 0;
  font-size: 0.88rem;
  color: var(--muted);
}

.foot-in a {
  margin-left: auto;
  font-weight: 600;
  transition: color 0.25s;
}

.foot-in a:hover {
  color: var(--ink);
}

/* ---------- Responsive ---------- */

@media (max-width: 720px) {
  .top {
    gap: 1rem;
  }
  .top-cta {
    display: none;
  }
  .nav a {
    padding: 0.45rem 0.65rem;
  }
  .brand img {
    height: 1.7rem;
  }
  .hero {
    padding-top: 6rem;
  }
  .hero-emblem {
    opacity: 0.1;
    right: -30%;
  }
  .stage {
    aspect-ratio: 4 / 5;
    min-height: 0;
    border-radius: 22px;
  }
  .stage-poster img {
    width: 100%;
  }
  .chip,
  .tool {
    padding: 0.5rem 0.75rem;
    font-size: 0.78rem;
    flex: none;
  }
  .stage-bar {
    padding: 0.8rem 0.8rem 0.9rem;
  }
  .chips {
    flex-wrap: nowrap;
    width: 100%;
    overflow-x: auto;
    scrollbar-width: none;
    padding-bottom: 2px;
  }
  .chips::-webkit-scrollbar {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
  .snow {
    display: none;
  }
}