src/styles.css

:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #f2f5f7;
  --muted: rgba(227, 235, 240, 0.58);
  --line: rgba(232, 240, 245, 0.16);
  --glass: rgba(12, 18, 26, 0.54);
  --accent: #a9d4ff;
}

* {
  box-sizing: border-box;
}

html,
body,
#app,
#scene {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
}

body {
  background: #0b1018;
  color: var(--ink);
  overscroll-behavior: none;
}

button,
a {
  color: inherit;
  font: inherit;
}

button {
  border: 0;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid #c4e5ff;
  outline-offset: 4px;
}

#scene,
#scene canvas {
  display: block;
  touch-action: none;
}

#scene canvas {
  width: 100%;
  height: 100%;
  cursor: grab;
}

#scene canvas:active {
  cursor: grabbing;
}

.interface {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1.1s ease;
}

.interface.is-ready {
  opacity: 1;
}

.topbar {
  position: absolute;
  top: max(24px, env(safe-area-inset-top));
  left: max(30px, env(safe-area-inset-left));
  right: max(30px, env(safe-area-inset-right));
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  gap: 13px;
  align-items: center;
  color: var(--ink);
  text-decoration: none;
  pointer-events: auto;
}

.brand__glyph {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 50%;
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand b,
.brand small {
  display: block;
}

.brand b {
  font-size: 12px;
  font-weight: 650;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.brand small {
  margin-top: 3px;
  color: var(--muted);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.conditions {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(9, 14, 21, 0.3);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(16px);
  color: rgba(239, 244, 247, 0.78);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.conditions i {
  width: 1px;
  height: 10px;
  background: var(--line);
}

.conditions__pulse {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #a5dcff;
  box-shadow: 0 0 12px #88ceff;
}

.intro {
  position: absolute;
  bottom: max(115px, calc(env(safe-area-inset-bottom) + 105px));
  left: max(42px, env(safe-area-inset-left));
  width: min(390px, calc(100vw - 84px));
  isolation: isolate;
  transition: opacity 0.6s ease, transform 0.8s cubic-bezier(0.2, 0.75, 0.2, 1);
}

.intro::before {
  position: absolute;
  inset: -38px -70px -34px -46px;
  z-index: -1;
  background: radial-gradient(ellipse at 28% 55%, rgba(5, 10, 16, 0.64) 0%, rgba(5, 10, 16, 0.33) 45%, transparent 74%);
  content: "";
  filter: blur(10px);
  pointer-events: none;
}

.intro.is-hidden {
  opacity: 0;
  transform: translateY(12px);
}

.eyebrow {
  display: block;
  color: rgba(221, 233, 240, 0.56);
  font-size: 9px;
  font-weight: 650;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}

.intro h2 {
  margin: 13px 0 14px;
  font-size: clamp(42px, 5.5vw, 78px);
  font-weight: 420;
  letter-spacing: -0.065em;
  line-height: 0.88;
  text-shadow: 0 2px 26px rgba(0, 0, 0, 0.22);
}

.intro h2 em {
  color: #b9dfff;
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 400;
  letter-spacing: -0.035em;
}

.intro p {
  width: min(360px, 100%);
  margin: 0 0 22px;
  color: rgba(235, 240, 244, 0.68);
  font-size: 12px;
  line-height: 1.65;
}

.text-button {
  display: inline-flex;
  align-items: center;
  gap: 16px;
  padding: 0 0 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
  background: transparent;
  cursor: pointer;
  pointer-events: auto;
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.text-button i {
  font-size: 13px;
  font-style: normal;
  transition: transform 0.25s ease;
}

.text-button:hover i {
  transform: translate(3px, -3px);
}

.metrics {
  position: absolute;
  right: max(32px, env(safe-area-inset-right));
  bottom: max(114px, calc(env(safe-area-inset-bottom) + 104px));
  display: flex;
  gap: 30px;
  padding-left: 22px;
  border-left: 1px solid var(--line);
}

.metrics div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.metrics b {
  font-size: 15px;
  font-weight: 450;
  letter-spacing: -0.02em;
}

.metrics span {
  color: var(--muted);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.dock {
  position: absolute;
  bottom: max(24px, env(safe-area-inset-bottom));
  left: 50%;
  display: flex;
  height: 64px;
  align-items: center;
  gap: 18px;
  padding: 0 12px 0 19px;
  transform: translateX(-50%);
  border: 1px solid rgba(235, 243, 248, 0.17);
  border-radius: 17px;
  background: rgba(10, 16, 23, 0.62);
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.28), inset 0 1px rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px) saturate(120%);
  pointer-events: auto;
}

.dock__group {
  display: flex;
  align-items: center;
}

.dock__group > span {
  margin-right: 12px;
  color: rgba(229, 237, 242, 0.38);
  font-size: 8px;
  font-weight: 650;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.dock__views {
  gap: 3px;
}

.dock__views button {
  padding: 8px 10px;
  border-radius: 8px;
  background: transparent;
  color: rgba(235, 241, 244, 0.52);
  cursor: pointer;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.035em;
  transition: color 0.2s, background 0.2s;
}

.dock__views button:hover,
.dock__views button.is-active {
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.dock__divider {
  width: 1px;
  height: 25px;
  background: var(--line);
}

.dock__time {
  min-width: 153px;
}

.dock__time > b {
  width: 34px;
  margin-left: 9px;
  color: rgba(238, 244, 247, 0.72);
  font-size: 9px;
  font-weight: 550;
}

.time-dots {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0;
}

.time-dots::before {
  position: absolute;
  top: 50%;
  right: 15px;
  left: 15px;
  z-index: -1;
  height: 1px;
  background: rgba(255, 255, 255, 0.14);
  content: "";
}

.time-dots button {
  position: relative;
  width: 30px;
  height: 44px;
  padding: 0;
  background: transparent;
  cursor: pointer;
}

.time-dots button::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  transform: translate(-50%, -50%);
  border: 2px solid rgba(7, 12, 18, 0.8);
  border-radius: 50%;
  background: #778797;
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.22);
  content: "";
  transition: transform 0.2s, box-shadow 0.2s;
}

.time-dots button:nth-child(1)::after { background: #f6b184; }
.time-dots button:nth-child(2)::after { background: #cfe8f2; }
.time-dots button:nth-child(3)::after { background: #829fc2; }
.time-dots button:nth-child(4)::after { background: #33425f; }

.time-dots button:hover::after,
.time-dots button.is-active::after {
  transform: translate(-50%, -50%) scale(1.45);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.55), 0 0 10px rgba(178, 216, 255, 0.6);
}

.icon-button {
  display: grid;
  width: 38px;
  height: 38px;
  flex: 0 0 38px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.045);
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.icon-button:hover,
.icon-button.is-active {
  border-color: rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.11);
}

.icon-button svg {
  width: 16px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.4;
}

.icon-button span {
  font-family: Georgia, serif;
  font-size: 15px;
}

.hint {
  position: absolute;
  bottom: max(38px, calc(env(safe-area-inset-bottom) + 14px));
  left: max(30px, env(safe-area-inset-left));
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(230, 237, 241, 0.48);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: opacity 0.5s ease;
}

.hint.is-hidden {
  opacity: 0;
}

.mouse {
  position: relative;
  width: 13px;
  height: 19px;
  border: 1px solid rgba(255, 255, 255, 0.38);
  border-radius: 7px;
}

.mouse i {
  position: absolute;
  top: 4px;
  left: 5px;
  width: 1px;
  height: 4px;
  background: rgba(255, 255, 255, 0.58);
  animation: scroll-hint 1.8s ease-in-out infinite;
}

.quality {
  position: absolute;
  right: max(30px, env(safe-area-inset-right));
  bottom: max(39px, calc(env(safe-area-inset-bottom) + 15px));
  display: flex;
  align-items: center;
  gap: 7px;
  color: rgba(231, 238, 242, 0.42);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.quality span {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #83cfad;
  box-shadow: 0 0 8px rgba(107, 227, 166, 0.55);
}

.quality b {
  font-weight: inherit;
}

.building-card {
  position: absolute;
  top: 50%;
  right: max(32px, env(safe-area-inset-right));
  width: 260px;
  padding: 22px;
  transform: translate(18px, -50%);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: rgba(10, 16, 24, 0.65);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.24), inset 0 1px rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(20px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.45s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.building-card.is-visible {
  transform: translate(0, -50%);
  opacity: 1;
  pointer-events: auto;
}

.building-card > button,
.help-panel__head button {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: transparent;
  color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  font-size: 17px;
}

.building-card h3 {
  margin: 9px 0 19px;
  font-family: Georgia, "Times New Roman", serif;
  font-size: 25px;
  font-weight: 400;
  letter-spacing: -0.025em;
}

.building-card__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.building-card__grid b,
.building-card__grid span {
  display: block;
}

.building-card__grid b {
  font-size: 11px;
  font-weight: 550;
}

.building-card__grid span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 7px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.help-panel {
  position: absolute;
  top: max(80px, calc(env(safe-area-inset-top) + 64px));
  right: max(30px, env(safe-area-inset-right));
  width: 290px;
  padding: 24px;
  transform: translateY(-10px);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 15px;
  background: rgba(10, 16, 24, 0.72);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.3), inset 0 1px rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(22px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s, transform 0.35s ease;
}

.help-panel.is-visible {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.help-panel__head {
  position: relative;
}

.help-panel__head button {
  top: -12px;
  right: -12px;
}

.help-panel h3 {
  margin: 9px 0 17px;
  font-family: Georgia, serif;
  font-size: 23px;
  font-weight: 400;
}

.help-panel dl {
  margin: 0;
  border-top: 1px solid var(--line);
}

.help-panel dl div {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 10px;
}

.help-panel dt {
  color: rgba(255, 255, 255, 0.84);
  font-weight: 600;
}

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

.help-panel > p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.6;
}

.loading {
  position: fixed;
  inset: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 34px;
  background:
    radial-gradient(circle at 65% 35%, rgba(47, 72, 97, 0.28), transparent 40%),
    #0b1119;
  transition: opacity 0.9s ease, visibility 0.9s;
}

.loading.is-complete {
  visibility: hidden;
  opacity: 0;
}

.loading__mark {
  display: grid;
  width: 50px;
  height: 50px;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
  transform: rotate(45deg);
}

.loading__mark span {
  border: 1px solid rgba(190, 222, 245, 0.55);
  animation: city-mark 1.6s ease-in-out infinite alternate;
}

.loading__mark span:nth-child(2) { animation-delay: -0.35s; }
.loading__mark span:nth-child(3) { animation-delay: -0.7s; }
.loading__mark span:nth-child(4) { animation-delay: -1.05s; }

.loading__copy {
  width: min(280px, 52vw);
}

.loading__copy h1 {
  margin: 8px 0 14px;
  font-family: Georgia, serif;
  font-size: 30px;
  font-weight: 400;
  letter-spacing: -0.03em;
}

.loading__track {
  width: 100%;
  height: 1px;
  background: rgba(255, 255, 255, 0.12);
}

.loading__track i {
  display: block;
  width: 6%;
  height: 100%;
  background: #c7e8ff;
  box-shadow: 0 0 10px rgba(164, 217, 255, 0.65);
  transition: width 0.45s ease;
}

.loading__copy p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.grain,
.vignette {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.grain {
  opacity: 0.15;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.26'/%3E%3C/svg%3E");
  mix-blend-mode: soft-light;
}

.vignette {
  background: radial-gradient(circle at 50% 46%, transparent 42%, rgba(2, 5, 9, 0.33) 120%);
}

.webgl-error {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  align-content: center;
  justify-items: center;
  padding: 30px;
  background: #0c121b;
  text-align: center;
}

.webgl-error[hidden] {
  display: none;
}

.webgl-error h1 {
  margin: 12px 0;
  font-family: Georgia, serif;
  font-size: clamp(36px, 7vw, 72px);
  font-weight: 400;
}

.webgl-error p {
  color: var(--muted);
}

@keyframes scroll-hint {
  0%, 100% { transform: translateY(0); opacity: 0.4; }
  50% { transform: translateY(4px); opacity: 1; }
}

@keyframes city-mark {
  from { background: rgba(177, 220, 252, 0.04); transform: scale(0.88); }
  to { background: rgba(177, 220, 252, 0.42); transform: scale(1); }
}

@media (max-width: 900px) {
  .metrics,
  .hint,
  .quality {
    display: none;
  }

  .intro {
    bottom: max(112px, calc(env(safe-area-inset-bottom) + 100px));
  }

  .dock {
    max-width: calc(100vw - 24px);
    gap: 9px;
    padding-right: 9px;
    padding-left: 12px;
  }

  .dock__group > span,
  .dock__divider:first-of-type,
  #help-toggle {
    display: none;
  }

  .dock__views button {
    min-height: 44px;
    padding-right: 8px;
    padding-left: 8px;
  }

  .dock__time {
    min-width: 106px;
  }

  .building-card {
    top: auto;
    right: 12px;
    bottom: max(101px, calc(env(safe-area-inset-bottom) + 89px));
    left: 12px;
    width: auto;
    transform: translateY(12px);
  }

  .building-card.is-visible {
    transform: translateY(0);
  }
}

@media (max-width: 560px) {
  .topbar {
    top: max(16px, env(safe-area-inset-top));
    right: max(16px, env(safe-area-inset-right));
    left: max(16px, env(safe-area-inset-left));
  }

  .brand small,
  .conditions i,
  #condition-weather {
    display: none;
  }

  .intro {
    left: max(22px, env(safe-area-inset-left));
    width: calc(100vw - 44px);
  }

  .intro h2 {
    font-size: clamp(45px, 15vw, 64px);
  }

  .intro p {
    max-width: 310px;
    font-size: 11px;
  }

  .dock {
    width: calc(100vw - 20px);
    height: 60px;
    justify-content: center;
    border-radius: 15px;
  }

  .dock__views button {
    font-size: 8px;
  }

  .dock__time > b,
  .dock__divider:last-of-type {
    display: none;
  }

  .dock__time {
    min-width: auto;
  }

  .icon-button {
    width: 44px;
    height: 44px;
    flex-basis: 44px;
  }

  .help-panel {
    right: 12px;
    left: 12px;
    width: auto;
  }

  .loading {
    flex-direction: column;
    gap: 26px;
  }

  .loading__copy {
    width: min(280px, calc(100vw - 54px));
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}