TimeTravel/src/styles/base.css

@tailwind base;
@tailwind components;
@tailwind utilities;

:root {
  color-scheme: dark;
  font-family:
    'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.5;
  font-weight: 400;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;

  --bg-primary: #000000;
  --bg-secondary: rgba(7, 15, 30, 0.72);
  --border-soft: rgba(148, 163, 184, 0.24);
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --accent: #38bdf8;
  --accent-strong: #22d3ee;
  --shadow-soft: 0 24px 80px rgba(2, 6, 23, 0.52);
}

* {
  box-sizing: border-box;
}

html,
body,
#app {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  min-height: 100vh;
  background: #000000;
  color: var(--text-primary);
}

button,
input,
select,
textarea {
  font: inherit;
}

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

canvas {
  display: block;
}

.travel-page {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  background: #000000;
}

.scene-layer {
  position: absolute;
  inset: 0;
}

.scene-layer canvas {
  width: 100%;
  height: 100%;
}

.scene-vignette {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at center, transparent 30%, rgba(0, 0, 0, 0.4) 70%, rgba(0, 0, 0, 0.9) 100%);
  pointer-events: none;
  z-index: 1;
}

.start-overlay {
  position: relative;
  z-index: 2;
  position: relative;
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.hero-card {
  width: min(640px, 100%);
  border: 1px solid var(--border-soft);
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(9, 16, 34, 0.8), rgba(8, 15, 29, 0.62)),
    rgba(7, 15, 30, 0.6);
  backdrop-filter: blur(22px);
  box-shadow: var(--shadow-soft);
  padding: 40px;
  text-align: center;
}

.hero-kicker {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

.hero-title {
  margin: 0;
  font-size: clamp(42px, 8vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.hero-description {
  margin: 18px auto 0;
  max-width: 34rem;
  color: var(--text-secondary);
  font-size: 16px;
}

.start-button {
  min-width: 220px;
  margin-top: 28px;
  border: 1px solid rgba(125, 211, 252, 0.45);
  border-radius: 999px;
  background:
    linear-gradient(135deg, rgba(34, 211, 238, 0.92), rgba(59, 130, 246, 0.88));
  box-shadow: 0 18px 48px rgba(14, 165, 233, 0.24);
  color: #e0f2fe;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  padding: 15px 26px;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    opacity 160ms ease;
}

.start-button:hover:not(:disabled) {
  box-shadow: 0 22px 52px rgba(14, 165, 233, 0.32);
  transform: translateY(-1px);
}

.start-button:disabled {
  cursor: progress;
  opacity: 0.72;
}

.error-text {
  margin: 14px 0 0;
  font-size: 13px;
}

.error-text {
  color: #fda4af;
}

.hud-layer {
  position: absolute;
  inset: 0;
  z-index: 3;
  pointer-events: none;
}

.hud-layer--active {
  pointer-events: none;
}

.hud-bottom-container {
  position: absolute;
  left: 50%;
  bottom: 28px;
  width: min(860px, calc(100% - 24px));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.glass-toolbar {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 18px;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(15, 23, 42, 0.25), rgba(15, 23, 42, 0.15));
  backdrop-filter: blur(16px) saturate(300%) brightness(1.6);
  -webkit-backdrop-filter: blur(16px) saturate(300%) brightness(1.6);
  box-shadow: 0 18px 56px rgba(2, 6, 23, 0.48);
  pointer-events: auto;
}

.footer-credit {
  font-size: 12px;
  color: rgba(226, 232, 240, 0.5);
  pointer-events: auto;
}

.footer-credit a {
  color: rgba(226, 232, 240, 0.8);
  text-decoration: none;
  font-weight: 500;
  transition: text-decoration 160ms ease;
}

.footer-credit a:hover {
  text-decoration: underline;
}

.toolbar-group {
  display: flex;
  min-width: 0;
  flex-direction: column;
  gap: 10px;
}

.toolbar-group--stretch {
  flex: 1;
}

.toolbar-group--compact {
  flex: 0 0 190px;
}

.toolbar-label {
  color: rgba(226, 232, 240, 0.82);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.segment-control {
  display: inline-flex;
  align-items: center;
  height: 46px;
  padding: 4px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.34);
  transition:
    border-color 160ms ease,
    background 160ms ease;
}

.segment-control:hover {
  border-color: rgba(125, 211, 252, 0.32);
  background: rgba(15, 23, 42, 0.56);
}

.segment-button {
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(226, 232, 240, 0.78);
  cursor: pointer;
  height: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  transition:
    background 160ms ease,
    color 160ms ease;
}

.segment-button--active {
  background: rgba(255, 255, 255, 0.1);
  color: #f8fafc;
}

.toolbar-action {
  height: 46px;
  min-height: 46px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.36);
  color: var(--text-primary);
  cursor: pointer;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease,
    opacity 160ms ease;
}

.toolbar-action:hover:not(:disabled) {
  border-color: rgba(125, 211, 252, 0.32);
  background: rgba(15, 23, 42, 0.56);
}

.toolbar-action--active {
  border-color: rgba(56, 189, 248, 0.28);
  background: rgba(56, 189, 248, 0.14);
  color: #f8fafc;
}

.toolbar-action:disabled {
  cursor: not-allowed;
  opacity: 0.52;
}

.glass-select,
.glass-range,
.toolbar-action {
  width: 100%;
}

.glass-select {
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background-color: rgba(2, 6, 23, 0.36);
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='rgba(226, 232, 240, 0.82)' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 16px;
  -webkit-appearance: none;
  appearance: none;
  color: var(--text-primary);
  height: 46px;
  min-height: 46px;
  outline: none;
  padding: 0 36px 0 16px;
  transition:
    border-color 160ms ease,
    background-color 160ms ease;
}

.glass-select:hover {
  border-color: rgba(125, 211, 252, 0.32);
  background-color: rgba(15, 23, 42, 0.56);
}

.range-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 46px;
  border: 1px solid rgba(148, 163, 184, 0.18);
  border-radius: 999px;
  background: linear-gradient(to right, rgba(255, 255, 255, 0.1) var(--volume-percent, 0%), rgba(2, 6, 23, 0.36) var(--volume-percent, 0%));
  background-clip: padding-box;
  transition: border-color 160ms ease;
  overflow: hidden;
}

.range-wrapper:hover {
  border-color: rgba(125, 211, 252, 0.32);
}

.range-value {
  position: absolute;
  pointer-events: none;
  font-size: 14px;
  color: rgba(226, 232, 240, 0.9);
  font-weight: 500;
  z-index: 1;
}

.glass-range {
  -webkit-appearance: none;
  appearance: none;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  background: transparent;
  outline: none;
  cursor: pointer;
  margin: 0;
  padding: 0;
}

.glass-range::-webkit-slider-runnable-track {
  width: 100%;
  height: 100%;
  background: transparent;
  border: none;
}

.glass-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 0;
  height: 0;
  opacity: 0;
  border: none;
  background: transparent;
}

.glass-range::-moz-range-track {
  width: 100%;
  height: 100%;
  background: transparent;
  border: none;
}

.glass-range::-moz-range-thumb {
  width: 0;
  height: 0;
  opacity: 0;
  border: none;
  background: transparent;
}

.overlay-fade-enter-active,
.overlay-fade-leave-active,
.controls-fade-enter-active,
.controls-fade-leave-active {
  transition:
    opacity 320ms ease,
    transform 320ms ease;
}

.overlay-fade-enter-from,
.overlay-fade-leave-to {
  opacity: 0;
  transform: scale(0.98);
}

.controls-fade-enter-from,
.controls-fade-leave-to {
  opacity: 0;
  transform: translate(-50%, 12px);
}

@media (max-width: 768px) {
  .start-overlay {
    padding: 16px;
  }

  .hero-card {
    border-radius: 28px;
    padding: 32px 20px 24px;
  }

  .hero-title {
    font-size: clamp(36px, 12vw, 54px);
  }

  .hero-description {
    font-size: 15px;
  }

  .hud-bottom-container {
    bottom: 16px;
    width: min(520px, calc(100% - 16px));
    gap: 12px;
  }

  .glass-toolbar {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
    border-radius: 24px;
    padding: 20px;
  }

  .segment-control {
    width: 100%;
  }

  .segment-button {
    flex: 1;
  }

  .toolbar-group--stretch {
    flex: none;
  }

  .toolbar-group--compact {
    flex: none;
  }
}