/* =====================================================================
   《币安起点 — CZ 的选择》 · Cinematic Realism UI
   Design tokens: deep black, warm paper, binance-gold accent, serif captions
   ===================================================================== */

:root {
  --bg-black: #050505;
  --bg-deep: #0b0b0c;
  --bg-panel: rgba(10, 10, 12, 0.82);
  --fg-main: #e8e5df;
  --fg-dim: #9a978f;
  --fg-muted: #5c5a55;
  --accent-gold: #f0b90b;
  --accent-gold-dim: rgba(240, 185, 11, 0.45);
  --choice-border: rgba(240, 185, 11, 0.25);
  --letterbox: #000;
  --serif: "Songti SC", "Source Han Serif SC", "Noto Serif SC", "Noto Serif",
    Georgia, "Times New Roman", serif;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC",
    "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg-black);
  color: var(--fg-main);
  font-family: var(--serif);
  -webkit-font-smoothing: antialiased;
  user-select: none;
}

/* ------ Overlays (stack) ------ */
.overlay {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 10;
  background: var(--bg-black);
  transition: opacity 0.6s ease;
}
.overlay.active { display: flex; }
.overlay.fading { opacity: 0; }

/* ------ Loader ------ */
#loader { z-index: 100; }
.loader-inner { text-align: center; }
.loader-title {
  font-family: var(--sans);
  font-size: 14px;
  letter-spacing: 0.4em;
  color: var(--fg-dim);
  margin-bottom: 20px;
}
.loader-bar {
  width: 240px;
  height: 1px;
  background: #222;
  margin: 0 auto;
  overflow: hidden;
}
.loader-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent-gold);
  transition: width 0.3s ease;
}

/* ------ Language splash ------ */
#lang-splash { z-index: 80; }
.lang-inner {
  text-align: center;
  padding: 40px;
}
.lang-title {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.6em;
  color: var(--fg-muted);
  margin-bottom: 60px;
  text-transform: uppercase;
}
.lang-buttons {
  display: flex;
  gap: 80px;
  justify-content: center;
}
.lang-btn {
  background: transparent;
  border: 1px solid #2a2a2a;
  color: var(--fg-main);
  padding: 40px 60px;
  font-family: var(--serif);
  cursor: pointer;
  transition: border-color 0.4s ease, background 0.4s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.lang-btn:hover {
  border-color: var(--accent-gold);
  background: rgba(240, 185, 11, 0.04);
}
.lang-btn .label {
  font-size: 28px;
  letter-spacing: 0.1em;
  font-weight: 500;
}
.lang-btn .sub {
  font-size: 13px;
  letter-spacing: 0.15em;
  color: var(--accent-gold-dim);
  margin-top: 4px;
  text-transform: uppercase;
}

/* ------ Content warning ------ */
#content-warning { z-index: 70; }
.warning-inner {
  max-width: 520px;
  padding: 40px;
  text-align: center;
  border: 1px solid #2a2a2a;
  background: var(--bg-deep);
}
.warning-title {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.4em;
  color: var(--accent-gold);
  margin-bottom: 24px;
  text-transform: uppercase;
}
.warning-body {
  font-size: 16px;
  line-height: 2;
  color: var(--fg-main);
  margin-bottom: 36px;
  white-space: pre-line;
}

/* ------ Buttons ------ */
.btn-primary {
  background: transparent;
  border: 1px solid var(--accent-gold);
  color: var(--accent-gold);
  padding: 12px 36px;
  font-family: var(--serif);
  font-size: 15px;
  letter-spacing: 0.2em;
  cursor: pointer;
  transition: background 0.3s ease, color 0.3s ease;
}
.btn-primary:hover {
  background: var(--accent-gold);
  color: #111;
}
.btn-ghost {
  background: transparent;
  border: 1px solid #2a2a2a;
  color: var(--fg-dim);
  padding: 10px 24px;
  font-family: var(--serif);
  font-size: 13px;
  letter-spacing: 0.15em;
  cursor: pointer;
  margin-top: 12px;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.btn-ghost:hover {
  color: var(--fg-main);
  border-color: var(--fg-dim);
}

/* ------ Title screen ------ */
#title-screen { z-index: 60; }
.title-inner {
  text-align: center;
  padding: 40px;
}
.title-main {
  font-size: 32px;
  letter-spacing: 0.24em;
  color: var(--fg-main);
  margin-bottom: 12px;
}
.title-sub {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-bottom: 80px;
}
.title-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.title-endings-counter {
  margin-top: 60px;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.3em;
  color: var(--fg-muted);
}

/* ------ Stage ------ */
#stage { z-index: 30; background: var(--bg-black); padding: 0; }
.bg-layer {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.72) contrast(1.05) saturate(0.92);
  transition: background-image 0.8s ease, opacity 0.8s ease;
}
.bg-layer::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at center, transparent 55%, rgba(0, 0, 0, 0.55) 100%);
  pointer-events: none;
}
.bg-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: brightness(0.72) contrast(1.05) saturate(0.92);
  pointer-events: none;
  z-index: 0;
}
/* Galgame sprite slots: left + right character立绘 over scene bg */
.sprite-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.sprite-layer .slot {
  position: absolute;
  bottom: 18vh;
  width: 36vw;
  max-width: 520px;
  height: 78vh;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  transition: filter 0.45s ease, opacity 0.45s ease, transform 0.45s ease;
}
.sprite-layer .slot.left  { left: 4vw; }
.sprite-layer .slot.right { right: 4vw; }

.sprite-layer .slot.dim {
  filter: brightness(0.55) saturate(0.72) blur(0.3px);
  opacity: 0.78;
  transform: translateY(6px);
}
.sprite-layer .slot.active {
  filter: brightness(1.05) saturate(1.05) drop-shadow(0 18px 32px rgba(0,0,0,0.55));
  opacity: 1;
  transform: translateY(0);
  z-index: 2;
}

.sprite-layer .sprite-img {
  max-width: 100%;
  max-height: 100%;
  height: auto;
  object-fit: contain;
  object-position: bottom center;
  opacity: 0;
  transition: opacity 0.55s ease;
}
.sprite-layer .sprite-img.show { opacity: 1; }

/* Film grain overlay */
.bg-layer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)' opacity='0.35'/></svg>");
  mix-blend-mode: overlay;
  opacity: 0.12;
  pointer-events: none;
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
  0%   { transform: translate(0, 0); }
  20%  { transform: translate(-2%, 1%); }
  40%  { transform: translate(1%, -2%); }
  60%  { transform: translate(-1%, 2%); }
  80%  { transform: translate(2%, 0); }
  100% { transform: translate(0, -1%); }
}

/* Letterbox bars */
.letterbox {
  position: absolute;
  left: 0;
  right: 0;
  height: 8vh;
  background: var(--letterbox);
  z-index: 5;
  pointer-events: none;
}
.letterbox.top { top: 0; }
.letterbox.bottom { bottom: 0; }

/* Textbox */
.textbox {
  position: absolute;
  left: 8vw;
  right: 8vw;
  bottom: 12vh;
  min-height: 22vh;
  padding: 28px 36px;
  background: var(--bg-panel);
  border-left: 2px solid var(--accent-gold);
  color: var(--fg-main);
  z-index: 8;
  cursor: pointer;
  backdrop-filter: blur(6px);
}
.speaker {
  font-family: var(--sans);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--accent-gold);
  margin-bottom: 14px;
  text-transform: uppercase;
  min-height: 17px;
}
.text {
  font-family: var(--serif);
  font-size: 20px;
  line-height: 1.9;
  white-space: pre-line;
  letter-spacing: 0.04em;
}
.text.narration {
  font-style: italic;
  color: var(--fg-dim);
}
.text.ambient {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--fg-muted);
  text-align: center;
  letter-spacing: 0.3em;
}
.continue-hint {
  position: absolute;
  right: 24px;
  bottom: 18px;
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-top: 8px solid var(--accent-gold-dim);
  animation: blink 1.4s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 0.3; }
  50%      { opacity: 1; }
}
.continue-hint.hidden { display: none; }

/* Choices */
.choices {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 9;
  display: none;
  flex-direction: column;
  gap: 16px;
  min-width: 520px;
  max-width: 72vw;
}
.choices.active { display: flex; }
.choice {
  background: rgba(5, 5, 5, 0.85);
  border: 1px solid var(--choice-border);
  color: var(--fg-main);
  padding: 20px 28px;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  cursor: pointer;
  text-align: left;
  letter-spacing: 0.04em;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.15s ease;
  white-space: pre-line;
}
.choice:hover {
  border-color: var(--accent-gold);
  background: rgba(240, 185, 11, 0.06);
  transform: translateX(4px);
}
.choice .choice-key {
  display: inline-block;
  width: 24px;
  color: var(--accent-gold);
  font-family: var(--sans);
  letter-spacing: 0;
}

/* Silence indicator (the 3 beats of silence before key choices) */
.silence {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  z-index: 7;
  color: var(--fg-muted);
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.5em;
  display: none;
}
.silence.active { display: block; animation: fadein 1.2s ease; }
@keyframes fadein { from { opacity: 0; } to { opacity: 1; } }

/* Top controls */
.top-controls {
  position: absolute;
  top: 12px;
  right: 16px;
  z-index: 12;
}
.icon-btn {
  background: transparent;
  border: 1px solid #2a2a2a;
  color: var(--fg-dim);
  width: 36px;
  height: 36px;
  font-size: 18px;
  cursor: pointer;
  transition: color 0.3s ease, border-color 0.3s ease;
}
.icon-btn:hover {
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

/* Pause menu */
#pause-menu { z-index: 40; background: rgba(0, 0, 0, 0.92); }
.pause-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 40px;
  min-width: 300px;
}
.pause-title {
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.5em;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-bottom: 30px;
}

/* Ending screen */
#ending-screen { z-index: 50; background: #000; padding: 0; }
.ending-inner {
  width: 100%;
  height: 100%;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.ending-cg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.6) saturate(0.85);
  overflow: hidden;
}
.ending-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  z-index: 0;
  pointer-events: none;
}
.ending-cg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.55) 0%,
    rgba(0, 0, 0, 0.15) 50%,
    rgba(0, 0, 0, 0.85) 100%
  );
}
.ending-badge {
  position: relative;
  z-index: 2;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.6em;
  color: var(--accent-gold);
  text-transform: uppercase;
  margin-bottom: 40px;
  padding: 8px 20px;
  border: 1px solid var(--accent-gold-dim);
}
.ending-epilogue {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-size: 19px;
  line-height: 2.2;
  color: var(--fg-main);
  text-align: center;
  max-width: 640px;
  padding: 0 40px;
  white-space: pre-line;
  margin-bottom: 60px;
  animation: fadein 2s ease;
}
.ending-line {
  position: relative;
  z-index: 2;
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--accent-gold);
  text-align: center;
  max-width: 640px;
  padding: 0 40px;
  margin-bottom: 60px;
  animation: fadein 3s ease;
}
.ending-actions {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
}

/* BAD_OMEGA — pure black with slow text */
#omega-screen { z-index: 55; background: #000; }
#omega-screen .omega-text {
  color: #cfcbc3;
  font-family: var(--serif);
  font-size: 21px;
  line-height: 2.4;
  text-align: center;
  max-width: 720px;
  padding: 0 40px;
  white-space: pre-line;
  min-height: 120px;
  opacity: 0;
  transition: opacity 3s ease;
}
#omega-screen .omega-text.show { opacity: 1; }
#omega-screen #btn-omega-rewind {
  position: absolute;
  bottom: 40px;
  opacity: 0;
  transition: opacity 2s ease;
}
#omega-screen #btn-omega-rewind.show { opacity: 0.7; }
#omega-screen #btn-omega-rewind.show:hover { opacity: 1; }

/* Flash memory callback (TRUE END first act) */
.flashback {
  position: absolute;
  inset: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #000;
  pointer-events: none;
}
.flashback .image {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  filter: brightness(0.7) contrast(1.1) blur(0.5px);
  opacity: 0;
  animation: flashin 2s ease forwards;
}
@keyframes flashin {
  0%   { opacity: 0; transform: scale(1.08); }
  30%  { opacity: 1; }
  100% { opacity: 0; transform: scale(1.0); }
}

/* Responsive clamp */
@media (max-width: 900px) {
  .text { font-size: 17px; }
  .choices { min-width: 86vw; }
  .textbox { left: 4vw; right: 4vw; bottom: 10vh; }
}