@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-ink);
  background: var(--color-paper);
  background-image:
    radial-gradient(70% 50% at 12% -10%, oklch(32% 0.08 155 / 0.38), transparent 58%),
    radial-gradient(55% 40% at 92% 8%, oklch(28% 0.06 210 / 0.22), transparent 52%),
    linear-gradient(180deg, oklch(16% 0.03 151), var(--color-paper) 42%, oklch(12% 0.026 151));
  padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom, 0px));
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: var(--z-grain);
  opacity: 0.055;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.85'/%3E%3C/svg%3E");
}

img,
svg {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent);
}

:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: var(--space-md);
  top: -4rem;
  z-index: 80;
  padding: var(--space-xs) var(--space-md);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-radius: var(--radius-pill);
}

.skip:focus {
  top: var(--space-md);
}

.wrap {
  width: min(1180px, 100%);
  margin-inline: auto;
  padding-inline: max(var(--page-gutter), env(safe-area-inset-left, 0px)) max(var(--page-gutter), env(safe-area-inset-right, 0px));
}

/* N5 floating pill */
.nav-pill {
  position: fixed;
  inset: var(--space-md) auto auto 50%;
  transform: translateX(-50%);
  z-index: var(--z-nav);
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4rem 0.9rem 0.4rem 1rem;
  background: color-mix(in oklch, var(--color-paper) 72%, transparent);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 14%, transparent);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-nav);
}

.wordmark {
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  color: var(--color-ink);
  text-decoration: none;
  white-space: nowrap;
}

.nav-pill__links {
  display: flex;
  gap: 0.15rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-pill__links a {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 0.7rem;
  border-radius: var(--radius-pill);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-ink-2);
  white-space: nowrap;
}

.nav-pill__links a:hover,
.nav-pill__links a[aria-current="page"] {
  color: var(--color-ink);
  background: color-mix(in oklch, var(--color-ink) 8%, transparent);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  padding: 0 0.95rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font: inherit;
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  white-space: nowrap;
}

.nav-cta:hover {
  filter: brightness(1.06);
}

.nav-cta:active {
  transform: translateY(1px);
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 0;
  border-radius: 50%;
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
}

/* Hero */
.hero {
  position: relative;
  z-index: var(--z-content);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--space-xl);
  align-items: end;
  padding-top: 6.5rem;
  padding-bottom: var(--space-2xl);
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 700;
  font-size: var(--text-display);
  line-height: 1.08;
  letter-spacing: 0.02em;
  overflow-wrap: anywhere;
  min-width: 0;
}

.hero__en {
  margin: var(--space-sm) 0 0;
  max-width: 28ch;
  color: var(--color-ink-2);
  font-size: var(--text-md);
  font-weight: 500;
  letter-spacing: 0.04em;
  line-height: 1.35;
}

.hero__lede {
  margin: var(--space-lg) 0 0;
  max-width: 36ch;
  color: var(--color-muted);
}

.radio {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  background: color-mix(in oklch, var(--color-paper-2) 58%, transparent);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 12%, transparent);
  box-shadow: inset 0 1px 0 oklch(96% 0.02 145 / 0.12);
}

.radio__vine {
  display: block;
  width: calc(100% + 0.4rem);
  height: 2.85rem;
  margin: 0.15rem -0.2rem 0.85rem;
  pointer-events: none;
}

.radio__kicker {
  margin: 0 0 var(--space-xs);
  font-size: var(--text-sm);
  color: var(--color-accent);
  font-weight: 500;
  letter-spacing: 0.14em;
}

.radio h2 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: 1.15;
}

.radio h2 a {
  color: inherit;
  text-decoration: none;
}

.radio h2 a:hover {
  color: var(--color-accent);
}

.radio p {
  margin: var(--space-sm) 0 var(--space-lg);
  color: var(--color-ink-2);
  max-width: 22em;
  line-height: 1.75;
}

.wave-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  min-height: 3rem;
  padding: 0 1.15rem 0 0.7rem;
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-ink);
  color: var(--color-paper);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}

.wave-btn:hover {
  color: var(--color-paper);
  background: var(--color-accent);
}

.wave-btn:active {
  transform: translateY(1px);
}

.wave {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  height: 1.15rem;
}

.wave span {
  display: block;
  width: 3px;
  height: 100%;
  border-radius: 2px;
  background: currentColor;
  transform-origin: center;
  animation: wave 1.05s var(--ease-in-out) infinite;
}

.wave span:nth-child(2) { animation-delay: -0.18s; }
.wave span:nth-child(3) { animation-delay: -0.36s; }
.wave span:nth-child(4) { animation-delay: -0.08s; }
.wave span:nth-child(5) { animation-delay: -0.48s; }

@keyframes wave {
  0%, 100% { transform: scaleY(0.35); }
  50% { transform: scaleY(1); }
}

/* Atlas / map */
.atlas {
  position: relative;
  z-index: var(--z-content);
  padding-bottom: var(--space-3xl);
}

.atlas__head {
  display: grid;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
  max-width: 40ch;
}

.atlas__head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  font-size: var(--text-display-s);
  font-weight: 700;
  line-height: 1.15;
}

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

.atlas-layout {
  display: grid;
  grid-template-columns: 7.5rem minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: start;
}

.trail {
  position: sticky;
  top: 5.5rem;
  padding-top: var(--space-sm);
}

.trail svg {
  width: 100%;
  height: auto;
}

.legend {
  list-style: none;
  margin: var(--space-sm) 0 0;
  padding: 0;
  display: grid;
  gap: 0.35rem;
}

.legend a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  text-decoration: none;
  font-size: var(--text-xs);
  color: var(--color-ink-2);
  white-space: nowrap;
}

.legend a:hover {
  color: var(--color-accent);
}

.dot {
  width: 0.55rem;
  height: 0.55rem;
  border-radius: 50%;
  background: var(--color-rule);
  box-shadow: 0 0 0 3px oklch(72% 0.16 162 / 0.12);
  flex: 0 0 auto;
}

.dot--forest { background: var(--color-accent); }
.dot--grass { background: oklch(78% 0.12 120); }
.dot--desert { background: var(--color-signal); }
.dot--polar { background: var(--color-audio); }
.dot--pre { background: oklch(62% 0.1 55); }
.dot--ocean { background: oklch(64% 0.1 230); }

.map {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  grid-auto-rows: minmax(13.5rem, auto);
  gap: var(--space-md);
}

.zone {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 12%, transparent);
  background: var(--color-paper-2);
  color: var(--color-ink);
}

.zone--forest { grid-column: 1 / 8; grid-row: 1 / 3; min-height: 28rem; }
.zone--grass { grid-column: 8 / 13; grid-row: 1 / 3; }
.zone--polar { grid-column: 1 / 7; grid-row: 3; min-height: 16.5rem; }
.zone--pre { grid-column: 7 / 13; grid-row: 3; min-height: 16.5rem; }
.zone--desert { grid-column: 1 / 6; grid-row: 4; min-height: 15rem; }
.zone--ocean { grid-column: 6 / 13; grid-row: 4; min-height: 15rem; }

.zone__sky {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
}

.zone__glass {
  position: relative;
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: color-mix(in oklch, var(--color-paper) 55%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 10%, transparent);
}

.zone h3 {
  margin: 0;
  font-family: var(--font-display);
  font-style: normal;
  font-size: 1.55rem;
  font-weight: 700;
  line-height: 1.2;
}

.zone-guide {
  display: inline-flex;
  margin: var(--space-xs) 0 var(--space-sm);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  max-width: 100%;
}

.zone-guide:hover {
  color: var(--color-signal);
}

.ocean-note {
  margin: 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
  max-width: 28ch;
}

.animals {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.animal {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.25rem;
  padding: 0 0.35rem 0 0.7rem;
  border-radius: var(--radius-pill);
  background: color-mix(in oklch, var(--color-paper) 45%, transparent);
  border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 10%, transparent);
  color: inherit;
  text-decoration: none;
}

.animal .name {
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
}

.animal:hover {
  color: var(--color-ink);
  border-color: color-mix(in oklch, var(--color-accent) 45%, transparent);
}

.audio-mini {
  width: 2.35rem;
  height: 2.35rem;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 50%;
  background: color-mix(in oklch, var(--color-audio) 18%, transparent);
  color: var(--color-audio);
  flex: 0 0 auto;
}

.animal:hover .audio-mini {
  background: var(--color-audio);
  color: var(--color-paper);
}

.audio-mini svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Footer */
.foot-stmt {
  position: relative;
  z-index: var(--z-content);
  padding: var(--space-2xl) var(--page-gutter) var(--space-xl);
  width: min(1180px, 100%);
  margin-inline: auto;
}

.foot-stmt__line {
  margin: 0;
  max-width: 10em;
  font-family: var(--font-display);
  font-style: normal;
  font-size: var(--text-foot);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: 0.02em;
}

.foot-stmt__meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

/* Biome skies */
.sky-forest {
  background:
    radial-gradient(80% 60% at 18% 10%, oklch(48% 0.14 155 / 0.45), transparent 55%),
    radial-gradient(70% 50% at 88% 90%, oklch(30% 0.08 180 / 0.4), transparent 50%),
    linear-gradient(165deg, oklch(22% 0.05 150), oklch(12% 0.03 151));
}

.sky-grass {
  background:
    radial-gradient(circle at 80% 12%, oklch(86% 0.08 90 / 0.35), transparent 28%),
    linear-gradient(180deg, oklch(22% 0.04 145), oklch(28% 0.08 120) 55%, oklch(18% 0.05 80));
}

.sky-desert {
  background:
    radial-gradient(circle at 70% 18%, oklch(88% 0.06 85 / 0.28), transparent 32%),
    linear-gradient(180deg, oklch(18% 0.03 250), oklch(32% 0.08 70) 62%, oklch(22% 0.06 55));
}

.sky-polar {
  background:
    linear-gradient(180deg, oklch(28% 0.08 160 / 0.45), transparent 40%),
    linear-gradient(180deg, oklch(16% 0.04 240), oklch(28% 0.05 220) 70%, oklch(72% 0.02 220));
}

.sky-pre {
  background:
    radial-gradient(60% 40% at 50% 100%, oklch(48% 0.12 55 / 0.45), transparent 60%),
    linear-gradient(180deg, oklch(16% 0.03 140), oklch(20% 0.05 90));
}

.sky-ocean {
  background:
    radial-gradient(50% 40% at 40% 0%, oklch(55% 0.1 210 / 0.35), transparent 50%),
    linear-gradient(180deg, oklch(18% 0.05 220), oklch(12% 0.04 230));
}

.leaf,
.dune,
.kelp,
.ice {
  position: absolute;
  opacity: 0.55;
}

@media (prefers-reduced-transparency: reduce) {
  .nav-pill,
  .radio,
  .zone__glass {
    background: var(--color-paper-2);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .wave span { animation: none; transform: scaleY(0.7); }
  .nav-cta:active,
  .wave-btn:active { transform: none; }
}

@media (min-width: 60rem) {
  .zone {
    justify-content: flex-end;
  }
}

@media (pointer: coarse) {
  .nav-pill__links a,
  .wave-btn,
  .zone-guide,
  .animal,
  .legend a {
    min-height: 2.75rem;
  }
  .audio-mini {
    width: 3.35rem;
    height: 3.35rem;
  }
  .audio-mini svg {
    width: 1.6rem;
    height: 1.6rem;
  }
  input[type="range"] {
    height: 8px;
  }
  input[type="range"]::-webkit-slider-thumb {
    width: 22px;
    height: 22px;
  }
  button,
  a,
  input {
    touch-action: manipulation;
  }
}

@media (max-width: 59.99rem) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: var(--space-lg);
    padding-top: 5.25rem;
    padding-bottom: var(--space-xl);
  }

  .atlas-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-md);
  }

  .trail {
    position: static;
  }

  .trail svg {
    display: none;
  }

  .legend {
    display: flex;
    flex-wrap: nowrap;
    gap: 0.5rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scroll-snap-type: x mandatory;
    margin-inline: calc(-1 * var(--page-gutter));
    padding: 0.15rem var(--page-gutter) 0.55rem;
    -webkit-overflow-scrolling: touch;
  }

  .legend li {
    flex: 0 0 auto;
    scroll-snap-align: start;
  }

  .legend a {
    min-height: 2.5rem;
    padding: 0 0.9rem;
    border-radius: var(--radius-pill);
    background: color-mix(in oklch, var(--color-paper-2) 80%, transparent);
    border: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 10%, transparent);
    font-size: var(--text-sm);
  }

  .map {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-auto-rows: auto;
    gap: var(--space-md);
  }

  .zone--forest,
  .zone--grass,
  .zone--polar,
  .zone--desert,
  .zone--ocean,
  .zone--pre {
    grid-column: 1 / -1;
    grid-row: auto;
    min-height: 0;
  }

  .zone {
    padding: 0;
    overflow: hidden;
  }

  .zone__sky {
    position: relative;
    inset: auto;
    height: 4.25rem;
    z-index: 0;
  }

  .zone__sky svg {
    display: none;
  }

  .zone--forest .sky-forest {
    background: url("media/forest-sky.jpg?v=2") center center / cover no-repeat;
  }

  .zone--grass .sky-grass {
    background: url("media/grass-sky.jpg?v=7") center center / cover no-repeat;
  }

  .zone--polar .sky-polar {
    background: url("media/polar-sky.jpg?v=1") center center / cover no-repeat;
  }

  .zone--desert .sky-desert {
    background: url("media/desert-sky.jpg?v=4") center center / cover no-repeat;
  }

  .zone--ocean .sky-ocean {
    background: url("media/ocean-sky.jpg?v=2") center center / cover no-repeat;
  }

  .zone--pre .sky-pre {
    background: url("media/pre-sky.jpg?v=1") center center / cover no-repeat;
  }

  .zone__glass {
    padding: 1rem 1rem 1.1rem;
    border-radius: 0;
    background: color-mix(in oklch, var(--color-paper) 72%, transparent);
    border: 0;
    border-top: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 8%, transparent);
    backdrop-filter: blur(10px) saturate(130%);
    -webkit-backdrop-filter: blur(10px) saturate(130%);
  }

  .zone h3 {
    font-size: 1.45rem;
    line-height: 1.25;
  }

  .zone-guide {
    display: flex;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
    min-height: 2.75rem;
    margin: 0.55rem 0 0.75rem;
    padding: 0 0.85rem;
    border-radius: var(--radius-md);
    background: color-mix(in oklch, var(--color-accent) 16%, transparent);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .animals {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 0.45rem;
  }

  .animal {
    width: 100%;
    min-height: 3.5rem;
    padding: 0 0.25rem 0 0.9rem;
    justify-content: space-between;
  }

  .audio-mini {
    width: 3.35rem;
    height: 3.35rem;
  }

  .audio-mini svg {
    width: 1.6rem;
    height: 1.6rem;
  }

  .animal .name {
    flex: 1;
    min-width: 0;
    padding-block: 0.55rem;
  }

  .foot-stmt__meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.35rem;
  }
}

@media (max-width: 40rem) {
  .nav-pill {
    inset: 0 auto auto 0;
    transform: none;
    width: 100%;
    max-width: none;
    justify-content: space-between;
    gap: 0.35rem;
    padding: max(0.4rem, env(safe-area-inset-top, 0px)) max(0.85rem, env(safe-area-inset-right, 0px)) 0.4rem max(0.85rem, env(safe-area-inset-left, 0px));
    border-radius: 0;
    border: 0;
    border-bottom: var(--rule-hair) solid color-mix(in oklch, var(--color-ink) 12%, transparent);
    box-shadow: none;
  }

  .nav-pill__links a {
    min-height: 2.5rem;
    padding: 0 0.55rem;
  }

  .hero {
    padding-top: calc(4.1rem + env(safe-area-inset-top, 0px));
    padding-bottom: var(--space-lg);
  }

  .hero h1 {
    font-size: clamp(1.85rem, 8.2vw, 2.35rem);
    line-height: 1.22;
    overflow-wrap: break-word;
  }

  .hero__en {
    max-width: none;
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    line-height: 1.45;
  }

  .hero__lede,
  .radio p,
  .atlas__head p {
    max-width: none;
  }

  .radio {
    padding: 1.05rem 1rem 1.15rem;
  }

  .radio h2 {
    font-size: 1.65rem;
  }

  .wave-btn {
    width: 100%;
    justify-content: center;
    min-height: 3rem;
  }

  .atlas {
    padding-bottom: var(--space-xl);
  }

  .atlas__head {
    max-width: none;
    margin-bottom: var(--space-md);
  }

  .foot-stmt {
    padding-top: var(--space-xl);
    padding-bottom: var(--space-lg);
  }

  .foot-stmt__line {
    max-width: 8em;
    font-size: clamp(1.55rem, 7vw, 2.1rem);
    line-height: 1.22;
  }
}

@media (max-width: 23.5rem) {
  .hero h1 {
    font-size: 1.7rem;
  }

  .zone-guide,
  .nav-pill__links a,
  .wave-btn {
    font-size: 0.875rem;
  }
}

/* Login gate */
.ak-gate {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  align-items: center;
  justify-content: flex-end;
  flex-direction: column;
  padding: 1.25rem 1.25rem calc(5.4rem + env(safe-area-inset-bottom, 0px));
  overflow: hidden;
  background: #07120a;
}

.ak-gate__film {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  pointer-events: none;
}

.ak-gate::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(
      180deg,
      oklch(10% 0.04 155 / 0.10) 0%,
      oklch(8% 0.03 155 / 0.22) 48%,
      oklch(6% 0.03 155 / 0.38) 100%
    );
}

html.ak-locked .ak-gate {
  display: flex;
}

html.ak-locked {
  overflow: hidden;
}

html.ak-locked body > :not(.ak-gate) {
  visibility: hidden;
}

.ak-card {
  display: none;
  position: relative;
  z-index: 2;
  width: min(22rem, 100%);
  padding: 1.6rem 1.35rem 1.4rem;
  border-radius: 1.15rem;
  background: color-mix(in oklch, var(--color-paper-2) 40%, transparent);
  border: 1px solid color-mix(in oklch, var(--color-ink) 10%, transparent);
  backdrop-filter: blur(10px);
}

.ak-card h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  line-height: 1.2;
}

.ak-card p {
  margin: 0.55rem 0 1.1rem;
  color: var(--color-muted);
  font-size: 0.95rem;
}

.ak-card label {
  display: block;
  margin-bottom: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-ink-2);
}

.ak-card input[type="password"] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0 0.85rem;
  border-radius: 0.7rem;
  border: 1px solid var(--color-rule);
  background: color-mix(in oklch, var(--color-paper) 72%, transparent);
  color: var(--color-ink);
  font: inherit;
}

.ak-card button {
  width: 100%;
  min-height: 2.85rem;
  margin-top: 0.85rem;
  border: 0;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.ak-err {
  margin: 0.7rem 0 0;
  color: var(--color-danger);
  font-size: 0.88rem;
}

.ak-gate.is-open .ak-card {
  display: block;
}

.ak-gate.is-open .ak-gate__enter {
  display: none;
}

.ak-gate__enter {
  position: relative;
  z-index: 2;
  margin: 0 0 16vh;
  padding: 0.55rem 0.9rem;
  border: 0;
  background: transparent;
  color: rgb(255 255 255 / 0.82);
  font-family: Huninn, "jf open 粉圓", "Noto Sans TC", sans-serif;
  font-size: 1.78rem;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.06em;
  -webkit-text-stroke: 0.55px rgb(255 255 255 / 0.55);
  paint-order: stroke fill;
  text-shadow: 0 0 22px rgb(255 255 255 / 0.42);
  cursor: pointer;
  animation: ak-enter-pulse 2.6s ease-in-out infinite;
}

.ak-gate__enter:focus-visible {
  outline: 2px solid rgb(255 255 255 / 0.7);
  outline-offset: 6px;
  border-radius: 999px;
}

@keyframes ak-enter-pulse {
  0%, 100% { opacity: 0.18; }
  50% { opacity: 0.95; }
}

@media (prefers-reduced-motion: reduce) {
  .ak-gate__enter {
    animation: none;
    opacity: 0.7;
  }
}

.ak-gate__spk {
  position: absolute;
  z-index: 3;
  right: max(1rem, env(safe-area-inset-right, 0px));
  bottom: max(1rem, env(safe-area-inset-bottom, 0px));
  display: grid;
  place-items: center;
  width: 3.35rem;
  height: 3.35rem;
  padding: 0;
  border: 1px solid color-mix(in oklch, var(--color-ink) 12%, transparent);
  border-radius: 999px;
  background: color-mix(in oklch, var(--color-paper-2) 42%, transparent);
  color: var(--color-accent);
  backdrop-filter: blur(10px);
  cursor: pointer;
}

.ak-gate__spk:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.ak-gate__spk-icon {
  display: none;
  width: 1.6rem;
  height: 1.6rem;
  margin: 0 auto;
}

.ak-gate__spk-icon--off {
  display: block;
}

.ak-gate__spk.is-on .ak-gate__spk-icon--off {
  display: none;
}

.ak-gate__spk.is-on .ak-gate__spk-icon--on {
  display: block;
}