/* ==========================================================================
   心光 · 正念日出
   层级：画布在底，暗场/暖洗/暗角在其上，文字最上。
   暗场（curtain）承载"越暗越看不清"的氛围，随太阳升起逐帧淡出。
   ========================================================================== */

:root {
  --ink: #f6efe4;
  --ink-dim: rgba(246, 239, 228, 0.62);
  --ink-faint: rgba(246, 239, 228, 0.34);
  --night: #04060c;
  --gold: #ffcb8a;
  --stroke: rgba(255, 236, 210, 0.16);
  --font-serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC", "SimSun", ui-serif, serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", sans-serif;
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #04060c;
  color: var(--ink);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overscroll-behavior: none;
}

body {
  position: fixed;
  inset: 0;
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  z-index: 0;
  outline: none;
}

/* ---------- 氛围层 ---------- */

.curtain {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    radial-gradient(120% 90% at 50% 108%, rgba(8, 14, 28, 0.92) 0%, rgba(4, 6, 12, 0.96) 55%, #04060c 100%),
    #04060c;
  opacity: 0.97;
  transition: opacity 120ms linear;
  will-change: opacity;
  mix-blend-mode: normal;
}

.sunwash {
  position: fixed;
  inset: 0;
  z-index: 3;
  pointer-events: none;
  opacity: 0;
  background:
    radial-gradient(46% 34% at 50% 74%, rgba(255, 196, 128, 0.30) 0%, rgba(255, 168, 96, 0.12) 42%, rgba(255, 150, 90, 0) 72%);
  mix-blend-mode: screen;
  transition: opacity 400ms linear;
  will-change: opacity;
}

.vignette {
  position: fixed;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background:
    radial-gradient(130% 100% at 50% 46%, rgba(0, 0, 0, 0) 42%, rgba(0, 0, 0, 0.28) 78%, rgba(0, 0, 0, 0.52) 100%);
  opacity: 0.9;
}

/* ---------- 顶栏 ---------- */

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: max(18px, env(safe-area-inset-top)) clamp(16px, 3.2vw, 40px) 0;
  pointer-events: none;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--ink);
  text-shadow: 0 1px 22px rgba(0, 0, 0, 0.55);
  opacity: 0.9;
}

.brand-mark {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 14px rgba(255, 203, 138, 0.85), 0 0 34px rgba(255, 170, 90, 0.45);
  align-self: center;
  animation: breathe 5.6s var(--ease) infinite;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); opacity: 0.75; }
  50% { transform: scale(1.35); opacity: 1; }
}

.brand-name {
  font-family: var(--font-serif);
  font-size: clamp(15px, 1.5vw, 18px);
  letter-spacing: 0.34em;
  padding-left: 0.34em;
}

.brand-sub {
  font-size: clamp(10px, 1vw, 12px);
  letter-spacing: 0.22em;
  color: var(--ink-faint);
}

.actions {
  display: flex;
  gap: 6px;
  pointer-events: auto;
}

.ghost {
  appearance: none;
  border: 1px solid transparent;
  background: rgba(255, 240, 220, 0.04);
  color: var(--ink-dim);
  font-family: inherit;
  font-size: 12px;
  letter-spacing: 0.12em;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 220ms var(--ease), background 220ms var(--ease), border-color 220ms var(--ease), transform 220ms var(--ease);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.ghost .ico { font-size: 12px; opacity: 0.9; }
.ghost:hover { color: var(--ink); background: rgba(255, 240, 220, 0.09); border-color: var(--stroke); }
.ghost:active { transform: scale(0.96); }
.ghost[aria-pressed="true"] {
  color: #2a1c0c;
  background: rgba(255, 214, 160, 0.88);
  border-color: rgba(255, 230, 200, 0.5);
  box-shadow: 0 0 22px rgba(255, 190, 120, 0.28);
}
.ghost:focus-visible { outline: 2px solid rgba(255, 214, 160, 0.8); outline-offset: 2px; }

/* ---------- 舞台：语录 ---------- */

.stage {
  position: fixed;
  inset: 0;
  z-index: 6;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: clamp(18px, 3vh, 34px);
  padding: 12vh clamp(22px, 8vw, 140px) 16vh;
  cursor: pointer;
  outline: none;
}

.stage:focus-visible { outline: none; }

.quote {
  position: relative;
  margin: 0;
  max-width: min(22em, 92vw);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 18px;
  transition: opacity 520ms var(--ease), transform 620ms var(--ease), filter 520ms var(--ease);
  will-change: opacity, transform;
}

/* 天色亮起来之后语录会压在很亮的天空上，加一层极淡的椭圆压暗，
 * 只托住文字本身，不破坏画面的通透感。 */
.quote::before {
  content: "";
  position: absolute;
  inset: -14% -18%;
  z-index: -1;
  background: radial-gradient(ellipse at 50% 46%,
    rgba(8, 12, 22, 0.80) 0%,
    rgba(8, 12, 22, 0.44) 34%,
    rgba(8, 12, 22, 0.14) 60%,
    rgba(8, 12, 22, 0) 84%);
  opacity: var(--quote-scrim, 0.10);
  pointer-events: none;
}

.quote-text {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(23px, 3.7vw, 44px);
  font-weight: 400;
  line-height: 1.72;
  letter-spacing: 0.1em;
  color: rgba(250, 244, 234, 0.94);
  text-shadow:
    0 0 2px rgba(0, 0, 0, 0.34),
    0 1px 6px rgba(0, 0, 0, 0.30),
    0 2px 18px rgba(0, 0, 0, 0.40),
    0 4px 46px rgba(0, 0, 0, 0.42),
    0 0 70px rgba(255, 216, 166, 0.10);
  white-space: pre-line;
}

.quote-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--ink-dim);
  font-size: clamp(11px, 1.05vw, 13px);
  letter-spacing: 0.3em;
}

.quote-meta::before,
.quote-meta::after {
  content: "";
  width: clamp(18px, 3vw, 36px);
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 232, 200, 0.42), transparent);
}

.quote-author {
  padding-left: 0.3em;
  white-space: nowrap;
}

.quote.is-out {
  opacity: 0;
  transform: translateY(12px) scale(0.985);
  filter: blur(5px);
}

.hint {
  position: absolute;
  bottom: clamp(64px, 12vh, 132px);
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  font-size: clamp(11px, 1.05vw, 13px);
  letter-spacing: 0.36em;
  color: var(--ink-faint);
  text-align: center;
  white-space: nowrap;
  animation: hintPulse 4.4s var(--ease) infinite;
  transition: opacity 700ms var(--ease);
}

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

@keyframes hintPulse {
  0%, 100% { opacity: 0.42; }
  50% { opacity: 0.86; }
}

/* ---------- 页脚进度 ---------- */

.foot {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10;
  padding: 0 clamp(16px, 3.2vw, 40px) max(16px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}

.progress {
  height: 1px;
  width: 100%;
  background: rgba(255, 240, 220, 0.1);
  overflow: hidden;
}

.progress i {
  display: block;
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, rgba(255, 203, 138, 0.35), rgba(255, 226, 180, 0.95));
  box-shadow: 0 0 12px rgba(255, 196, 128, 0.6);
  transition: width 620ms var(--ease);
}

.foot-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-size: 10.5px;
  letter-spacing: 0.28em;
  color: var(--ink-faint);
}

.phase { flex: 1; text-align: center; }
.fps { opacity: 0.55; font-variant-numeric: tabular-nums; }
/* 调试用的帧率数字不进成品界面（真机 60fps，无信息量） */
html:not([data-debug="1"]) .fps { display: none; }

/* ---------- 无障碍 ---------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ---------- 致命错误 ---------- */

.fatal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  background: #04060c;
  padding: 24px;
}

.fatal[hidden] { display: none; }

.fatal-card {
  max-width: 34em;
  text-align: center;
  color: var(--ink-dim);
  line-height: 1.9;
}

.fatal-card h1 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: 0.24em;
  color: var(--ink);
  margin: 0 0 12px;
}

.fatal-card code {
  font-family: ui-monospace, Menlo, Consolas, monospace;
  font-size: 0.92em;
  color: var(--gold);
}

/* ---------- 窄屏 ---------- */

@media (max-width: 640px) {
  .brand-sub { display: none; }
  .ghost .txt { display: none; }
  .ghost { padding: 8px 10px; }
  .stage { padding-bottom: 20vh; }
  .quote-text { letter-spacing: 0.08em; line-height: 1.78; }
}

@media (prefers-reduced-motion: reduce) {
  .brand-mark { animation: none; }
  .hint { animation: none; opacity: 0.6; }
  .quote { transition: opacity 200ms linear; }
}