src/styles.css

:root {
  color-scheme: dark;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ink: #f4f7fb;
  --muted: rgba(244, 247, 251, 0.72);
  --quiet: rgba(244, 247, 251, 0.48);
  --panel: rgba(8, 14, 18, 0.68);
  --panel-strong: rgba(8, 14, 18, 0.86);
  --line: rgba(255, 255, 255, 0.16);
  --line-strong: rgba(255, 255, 255, 0.28);
  --accent: #35e6c9;
  --accent-2: #ffcf5a;
  --danger: #ff6978;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  height: 100%;
  margin: 0;
  overflow: hidden;
  background: #030607;
  color: var(--ink);
}

button {
  border: 0;
  font: inherit;
  color: inherit;
}

#viewport {
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 30% 18%, rgba(53, 230, 201, 0.12), transparent 28rem),
    linear-gradient(180deg, #061114, #010202);
}

#viewport canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
  cursor: crosshair;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.16;
  mix-blend-mode: soft-light;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 6px 6px;
  mask-image: linear-gradient(180deg, transparent, #000 16%, #000 84%, transparent);
}

.topbar {
  position: fixed;
  top: clamp(14px, 3vw, 28px);
  left: clamp(14px, 3vw, 32px);
  right: clamp(14px, 3vw, 32px);
  z-index: 3;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 18px;
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
  color: var(--accent);
}

h1 {
  margin: 0;
  max-width: min(760px, 70vw);
  font-size: clamp(2.1rem, 5vw, 5.3rem);
  line-height: 0.94;
  letter-spacing: 0;
  text-shadow: 0 10px 48px rgba(0, 0, 0, 0.7);
}

.status-strip {
  position: fixed;
  top: clamp(78px, 9vh, 92px);
  right: clamp(14px, 3vw, 32px);
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  color: var(--muted);
  font-size: 0.78rem;
  white-space: nowrap;
}

.status-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 20px;
}

.status-strip span:first-child {
  color: var(--ink);
  font-weight: 700;
}

.status-strip span + span::before {
  content: "";
  width: 5px;
  height: 5px;
  margin-right: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 16px var(--accent);
}

.hero-panel {
  position: fixed;
  left: clamp(14px, 3vw, 32px);
  bottom: clamp(138px, 19vh, 210px);
  z-index: 3;
  display: grid;
  gap: 18px;
  width: min(450px, calc(100vw - 28px));
  pointer-events: none;
}

.hero-copy {
  display: grid;
  gap: 12px;
}

.pill {
  width: fit-content;
  padding: 7px 10px;
  border: 1px solid rgba(53, 230, 201, 0.42);
  border-radius: 999px;
  background: rgba(3, 8, 9, 0.52);
  color: #a5fff1;
  font-size: 0.78rem;
  font-weight: 800;
  box-shadow: 0 0 34px rgba(53, 230, 201, 0.18);
  backdrop-filter: blur(14px);
}

.hero-copy p {
  margin: 0;
  max-width: 42ch;
  color: rgba(244, 247, 251, 0.82);
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  line-height: 1.45;
  text-shadow: 0 6px 28px rgba(0, 0, 0, 0.72);
}

.primary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  pointer-events: auto;
}

.primary-button,
.ghost-button,
.icon-button,
.scene-option,
.segment {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.primary-button,
.ghost-button {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 18px;
  font-weight: 800;
  cursor: pointer;
}

.primary-button {
  background: linear-gradient(135deg, rgba(53, 230, 201, 0.96), rgba(95, 172, 255, 0.88));
  color: #03100e;
  border-color: rgba(255, 255, 255, 0.36);
}

.ghost-button {
  color: var(--ink);
}

.button-icon {
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
  font-size: 0.82rem;
  line-height: 1;
}

.primary-button:hover,
.ghost-button:hover,
.icon-button:hover,
.scene-option:hover,
.segment:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
}

.controls {
  position: fixed;
  left: clamp(14px, 3vw, 32px);
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(14px, 3vw, 28px);
  z-index: 4;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
  pointer-events: none;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(118px, 1fr));
  gap: 10px;
  max-width: 760px;
  pointer-events: auto;
}

.scene-option {
  position: relative;
  display: grid;
  min-height: 82px;
  padding: 10px;
  overflow: hidden;
  isolation: isolate;
  text-align: left;
  cursor: pointer;
}

.scene-option::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background-image: var(--thumb);
  background-position: center;
  background-size: cover;
  filter: saturate(1.06) contrast(1.05);
  transform: scale(1.04);
}

.scene-option::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.08), rgba(0, 0, 0, 0.74)),
    linear-gradient(90deg, rgba(0, 0, 0, 0.42), transparent 70%);
}

.scene-option.active {
  border-color: rgba(53, 230, 201, 0.72);
  box-shadow:
    0 0 0 1px rgba(53, 230, 201, 0.18) inset,
    0 18px 44px rgba(0, 0, 0, 0.3);
}

.scene-name {
  align-self: end;
  display: grid;
  gap: 2px;
  font-weight: 850;
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.72);
}

.scene-name small {
  color: rgba(244, 247, 251, 0.72);
  font-size: 0.72rem;
  font-weight: 650;
}

.control-row {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  pointer-events: auto;
}

.segmented {
  display: flex;
  min-height: 42px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.24);
  backdrop-filter: blur(18px);
}

.segment {
  min-width: 92px;
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  color: var(--muted);
  cursor: pointer;
}

.segment.active {
  background: rgba(255, 255, 255, 0.14);
  color: var(--ink);
  font-weight: 800;
}

.icon-button {
  display: grid;
  place-items: center;
  width: 44px;
  padding: 0;
  cursor: pointer;
  font-size: 1.15rem;
}

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

.reticle {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 18px;
  height: 18px;
  opacity: 0;
  transform: translate(-50%, -50%);
  transition: opacity 160ms ease;
}

.reticle::before,
.reticle::after {
  content: "";
  position: absolute;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 0 14px rgba(53, 230, 201, 0.45);
}

.reticle::before {
  top: 8px;
  left: 0;
  width: 18px;
  height: 2px;
}

.reticle::after {
  top: 0;
  left: 8px;
  width: 2px;
  height: 18px;
}

.is-walking .reticle {
  opacity: 1;
}

.metrics {
  position: absolute;
  right: clamp(14px, 3vw, 32px);
  bottom: clamp(78px, 12vh, 120px);
  display: flex;
  gap: 8px;
}

.metrics span {
  min-width: 70px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(8, 14, 18, 0.58);
  color: rgba(244, 247, 251, 0.76);
  text-align: center;
  font-size: 0.76rem;
  font-weight: 800;
  backdrop-filter: blur(16px);
}

.loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 8;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle at 50% 35%, rgba(53, 230, 201, 0.22), transparent 30rem),
    rgba(1, 3, 4, 0.72);
  backdrop-filter: blur(10px);
  transition:
    opacity 280ms ease,
    visibility 280ms ease;
}

.loading-overlay.hidden {
  visibility: hidden;
  opacity: 0;
}

.loader-card {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: min(420px, calc(100vw - 32px));
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
}

.loader-ring {
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  border: 3px solid rgba(255, 255, 255, 0.12);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 900ms linear infinite;
}

.loader-title {
  margin: 0 0 4px;
  font-weight: 850;
}

#loaderText {
  margin: 0;
  color: var(--muted);
  line-height: 1.4;
}

.toast {
  position: fixed;
  right: clamp(14px, 3vw, 32px);
  top: clamp(70px, 12vh, 118px);
  z-index: 9;
  max-width: min(360px, calc(100vw - 28px));
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-strong);
  box-shadow: var(--shadow);
  color: rgba(244, 247, 251, 0.84);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.toast.visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 820px) {
  .topbar {
    align-items: flex-start;
  }

  h1 {
    max-width: 100%;
    font-size: clamp(2rem, 11vw, 3.6rem);
  }

  .status-strip {
    display: none;
  }

  .hero-panel {
    bottom: 206px;
  }

  .controls {
    grid-template-columns: 1fr;
  }

  .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    max-width: none;
  }

  .control-row {
    justify-content: stretch;
  }

  .segmented {
    flex: 1;
  }

  .segment {
    flex: 1;
    min-width: 0;
  }

  .metrics {
    right: 14px;
    bottom: 164px;
  }
}

@media (max-width: 520px) {
  .topbar {
    top: 12px;
    left: 14px;
    right: 14px;
  }

  .hero-panel {
    bottom: 244px;
  }

  .hero-copy p {
    display: none;
  }

  .scene-option {
    min-height: 70px;
  }

  .primary-actions {
    width: 100%;
  }

  .primary-button,
  .ghost-button {
    flex: 1;
    justify-content: center;
    min-width: 0;
  }

  .metrics {
    display: none;
  }
}