/* ============================================================
   毛毛专属恋爱博物馆 — v1.0 3D 版样式
   保留：邀请函 / 身份验证 / 弹窗 / 灯箱 / Toast
   替换：2.5D CSS 房间 → Three.js 3D 容器
   ============================================================ */

:root {
  --bg-deep: #060612; --text-primary: #e6dff0; --text-secondary: #b0a8c8; --text-muted: #6e6688;
  --accent: #c4a8f0; --accent-glow: rgba(170,140,210,.35); --gold: #cfb878; --gold-glow: rgba(200,175,110,.3);
  --error: #e08890;
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  font-size: 16px; -webkit-font-smoothing: antialiased;
  background: var(--bg-deep); overflow: hidden; height: 100%;
}
body {
  font-family: var(--font-cn); background: var(--bg-deep); color: var(--text-primary);
  height: 100dvh; overflow: hidden;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  user-select: none; -webkit-user-select: none; touch-action: manipulation;
}

#starfield { position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 0; pointer-events: none; }
#app { position: fixed; top: 0; left: 0; width: 100%; height: 100dvh; z-index: 1; }
.hidden { display: none !important; }

.loading-screen {
  position: fixed; inset: 0; z-index: 300;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 13px;
  background:
    radial-gradient(circle at 50% 44%, rgba(91,67,141,.24), transparent 30%),
    rgba(6,6,18,.98);
  color: var(--text-secondary); font-size: .78rem; letter-spacing: .08em;
  opacity: 1; transition: opacity .65s ease;
}
.loading-screen.is-ready { opacity: 0; pointer-events: none; }

/* 手机端横屏入口：竖屏时暂停进入体验，旋转后自动消失 */
.orientation-gate { display: none; }

@media (orientation: portrait) and (max-width: 900px) {
  .orientation-gate {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: max(24px, env(safe-area-inset-top)) max(24px, env(safe-area-inset-right))
      max(24px, env(safe-area-inset-bottom)) max(24px, env(safe-area-inset-left));
    overflow: hidden;
    background:
      radial-gradient(circle at 50% 38%, rgba(174, 132, 220, .2), transparent 34%),
      radial-gradient(circle at 20% 20%, rgba(229, 199, 121, .08), transparent 24%),
      rgba(4, 4, 16, .985);
  }
  .orientation-card {
    width: min(360px, 88vw);
    text-align: center;
    color: var(--text-secondary);
  }
  .phone-rotate {
    position: relative;
    width: 54px;
    height: 92px;
    margin: 0 auto 24px;
    border: 2px solid rgba(229, 199, 121, .78);
    border-radius: 10px;
    box-shadow: 0 0 28px rgba(229, 199, 121, .16), inset 0 0 18px rgba(174, 132, 220, .1);
    animation: turn-landscape 2.2s ease-in-out infinite;
  }
  .phone-rotate::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 6px;
    width: 5px;
    height: 5px;
    border: 1px solid rgba(229, 199, 121, .7);
    border-radius: 50%;
    transform: translateX(-50%);
  }
  .phone-rotate span {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: var(--gold);
    font-size: 1rem;
    text-shadow: 0 0 14px var(--gold-glow);
  }
  .orientation-title {
    margin: 0 0 10px;
    color: #f1d89a;
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: .08em;
  }
  .orientation-copy {
    margin: 0;
    color: var(--text-secondary);
    font-size: .78rem;
    line-height: 1.8;
    letter-spacing: .04em;
  }
  .orientation-stars {
    margin-top: 18px;
    color: rgba(229, 199, 121, .66);
    font-size: .75rem;
    letter-spacing: .22em;
  }
}

@keyframes turn-landscape {
  0%, 24% { transform: rotate(0deg); }
  52%, 78% { transform: rotate(90deg); }
  100% { transform: rotate(0deg); }
}
.loading-stars {
  color: var(--gold); font-size: 1.15rem; letter-spacing: .18em;
  text-shadow: 0 0 16px var(--gold-glow);
  animation: loadingTwinkle 1.35s ease-in-out infinite;
}
@keyframes loadingTwinkle {
  0%, 100% { opacity: .42; transform: scale(.94); }
  50% { opacity: 1; transform: scale(1.06); }
}

/* ---------- 3D 场景容器 ---------- */
#three-container {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 5;
}
#three-container canvas {
  display: block;
}

/* ---------- 动画 ---------- */
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes pulseGlow { 0%,100% { opacity: .45; } 50% { opacity: .8; } }
@keyframes tapPulse { 0%,100% { opacity: .5; transform: translateY(0); } 50% { opacity: 1; transform: translateY(-3px); } }

/* ================================================================
   全屏浮层（intro / auth / authSuccess）
   ================================================================ */
.fullscreen-overlay {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6,6,18,.85); z-index: 50;
  opacity: 0; pointer-events: none; transition: opacity .5s;
}
.fullscreen-overlay.active { opacity: 1; pointer-events: auto; }

/* intro */
.intro-card {
  position: relative; max-width: 310px; width: 88%; padding: 32px 20px 24px;
  text-align: center; background: rgba(14,12,30,.88); border-radius: 20px;
  border: 1px solid rgba(180,150,220,.2);
  animation: float 4s ease-in-out infinite;
}
.intro-glow {
  position: absolute; top: -25px; left: -25px; right: -25px; bottom: -25px;
  border-radius: 26px;
  background: radial-gradient(ellipse at 50% 40%, rgba(170,140,210,.2) 0%, transparent 60%);
  pointer-events: none; z-index: -1;
  animation: pulseGlow 3s ease-in-out infinite;
}
.intro-text p { font-size: .85rem; line-height: 2.2; color: var(--text-secondary); letter-spacing: .04em; }
.intro-emphasis { font-size: 1rem !important; color: var(--gold) !important; font-weight: 600; text-shadow: 0 0 12px var(--gold-glow); }
.intro-cta { margin-top: 4px; }
.intro-go { font-size: 1.05rem !important; color: var(--accent) !important; font-weight: 700; text-shadow: 0 0 10px var(--accent-glow); }
.tap-hint {
  margin-top: 18px; font-size: .68rem; color: var(--text-muted);
  letter-spacing: .07em; animation: tapPulse 2s ease-in-out infinite;
}

/* auth */
.auth-card {
  max-width: 290px; width: 88%; padding: 28px 20px 22px; text-align: center;
  background: rgba(14,12,30,.88); border-radius: 18px; border: 1px solid rgba(180,150,220,.2);
}
.auth-question { font-size: .9rem; color: var(--text-primary); margin-bottom: 12px; }
.auth-input-row { display: flex; gap: 8px; margin-bottom: 8px; }
.auth-input {
  flex: 1; background: rgba(22,18,44,.85); border: 1px solid rgba(180,150,220,.25);
  border-radius: 12px; padding: 12px 14px; font-size: .88rem;
  color: var(--text-primary); font-family: var(--font-cn); outline: none; min-width: 0;
}
.auth-input:focus { border-color: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }
.auth-input::placeholder { color: var(--text-muted); }
.auth-btn {
  flex-shrink: 0; background: rgba(140,110,180,.3); border: 1px solid rgba(180,150,220,.3);
  border-radius: 12px; padding: 12px 16px; color: var(--text-primary);
  font-size: .82rem; font-family: var(--font-cn); cursor: pointer;
}
.auth-btn:active { transform: scale(.95); }
.auth-msg { min-height: 16px; font-size: .78rem; line-height: 1.6; text-align: center; }
.auth-msg.error { color: var(--error); }

/* authSuccess */
.success-card {
  max-width: 290px; width: 88%; padding: 28px 20px 24px; text-align: center;
  background: rgba(14,12,30,.88); border-radius: 18px;
  border: 1px solid rgba(200,175,110,.25); position: relative;
}
.success-glow {
  position: absolute; top: -22px; left: -22px; right: -22px; bottom: -22px;
  border-radius: 20px;
  background: radial-gradient(ellipse at 50% 40%, var(--gold-glow) 0%, transparent 60%);
  pointer-events: none; z-index: -1; animation: pulseGlow 2.5s ease-in-out infinite;
}
.success-text p { font-size: .85rem; line-height: 2.2; color: var(--text-secondary); letter-spacing: .04em; }
.success-emphasis { font-size: 1rem !important; color: var(--gold) !important; font-weight: 600; text-shadow: 0 0 10px var(--gold-glow); }
.btn-enter-hall {
  display: inline-flex; gap: 6px; margin-top: 16px;
  background: linear-gradient(135deg, rgba(200,160,100,.45), rgba(170,120,60,.35));
  border: 1px solid rgba(210,180,110,.45); border-radius: 14px;
  padding: 12px 28px; color: var(--gold); font-size: .9rem;
  font-family: var(--font-cn); cursor: pointer; box-shadow: 0 0 18px var(--gold-glow);
}
.btn-enter-hall:active { transform: scale(.95); }

/* ================================================================
   门提示浮层
   ================================================================ */
.door-toast {
  position: absolute; top: 22%; left: 50%; transform: translateX(-50%); z-index: 30;
  background: rgba(22,18,40,.94); border: 1px solid rgba(180,150,220,.25);
  border-radius: 12px; padding: 10px 20px; font-size: .7rem;
  color: var(--text-secondary); white-space: nowrap; pointer-events: none;
  opacity: 0; transition: opacity .3s;
}
.door-toast.show { opacity: 1; }

.progress-hud {
  position: absolute;
  top: max(14px, env(safe-area-inset-top));
  right: max(14px, env(safe-area-inset-right));
  z-index: 32;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.progress-pill {
  min-width: 112px;
  padding: 8px 12px;
  border-radius: 999px;
  border: 1px solid rgba(207,184,120,.34);
  background: rgba(12,10,28,.68);
  color: var(--gold);
  font-size: .72rem;
  line-height: 1;
  text-align: center;
  box-shadow: 0 0 18px rgba(207,184,120,.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.progress-pill.secret {
  border-color: rgba(196,168,240,.34);
  color: var(--accent);
  box-shadow: 0 0 18px rgba(196,168,240,.12);
}
.progress-pill span { font-weight: 700; }

.audio-toggle {
  position: absolute;
  top: max(14px, env(safe-area-inset-top));
  left: max(14px, env(safe-area-inset-left));
  z-index: 32;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(196,168,240,.3);
  border-radius: 50%;
  background: rgba(12,10,28,.68);
  color: var(--accent);
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 0 18px rgba(196,168,240,.12);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: color .25s, border-color .25s, opacity .25s, transform .2s;
}
.audio-toggle:active { transform: scale(.92); }
.audio-toggle.is-muted {
  color: var(--text-muted);
  border-color: rgba(110,102,136,.28);
  opacity: .76;
}

/* ================================================================
   弹窗 / 灯箱 / Toast
   ================================================================ */
.modal-overlay {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 60;
  background: rgba(4,4,16,.88); display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .4s;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-card {
  width: 85%; max-width: 280px; padding: 24px 16px 20px;
  background: rgba(16,14,34,.95); border-radius: 18px;
  border: 1px solid rgba(180,150,220,.25); text-align: center;
}
.modal-question {
  font-size: .85rem; color: var(--text-primary); letter-spacing: .03em;
  margin-bottom: 12px; line-height: 1.7;
}
.modal-input {
  width: 100%; background: rgba(22,18,42,.85); border: 1px solid rgba(180,150,220,.2);
  border-radius: 12px; padding: 11px 14px; font-size: .82rem;
  color: var(--text-primary); font-family: var(--font-cn); outline: none; margin-bottom: 10px;
}
.modal-input:focus { border-color: var(--accent); box-shadow: 0 0 12px var(--accent-glow); }
.modal-input::placeholder { color: var(--text-muted); }
.modal-submit-btn {
  background: rgba(140,110,180,.3); border: 1px solid rgba(180,150,220,.3);
  border-radius: 12px; padding: 10px 28px; color: var(--text-primary);
  font-size: .8rem; font-family: var(--font-cn); cursor: pointer;
}
.modal-submit-btn:active { transform: scale(.95); }
.modal-msg { margin-top: 6px; font-size: .68rem; color: var(--text-muted); min-height: 14px; }
.room-question-card { max-width: 320px; }
.room-choice-list {
  display: grid; grid-template-columns: 1fr 1fr; gap: 9px; margin: 12px 0 8px;
}
.room-choice-btn {
  background: rgba(120,84,42,.35); border: 1px solid rgba(220,180,115,.36);
  border-radius: 12px; padding: 10px 8px; color: #f4ddb8;
  font-size: .78rem; font-family: var(--font-cn); cursor: pointer;
}
.room-choice-btn:active { transform: scale(.96); }
.room-free-answer { margin-top: 10px; }

.secret-card {
  max-width: 330px;
  border-color: rgba(207,184,120,.34);
  box-shadow: 0 0 42px rgba(207,184,120,.12);
}
.secret-title {
  color: var(--gold);
  font-size: .95rem;
  font-weight: 700;
  letter-spacing: .03em;
  margin-bottom: 12px;
  text-shadow: 0 0 12px var(--gold-glow);
}
.secret-body {
  color: var(--text-secondary);
  font-size: .82rem;
  line-height: 1.9;
  margin-bottom: 16px;
}

.final-letter-overlay {
  padding: max(16px, env(safe-area-inset-top)) 16px max(16px, env(safe-area-inset-bottom));
  background:
    radial-gradient(circle at 50% 32%, rgba(130,96,190,.24), transparent 48%),
    rgba(4,4,16,.9);
}
.final-letter-card {
  position: relative;
  width: min(520px, 92vw);
  max-width: 520px;
  max-height: min(82vh, 720px);
  padding: 27px 26px 24px;
  overflow-y: auto;
  text-align: left;
  border-color: rgba(229,199,121,.42);
  border-radius: 22px;
  background:
    radial-gradient(circle at 85% 8%, rgba(229,199,121,.13), transparent 28%),
    radial-gradient(circle at 10% 90%, rgba(176,139,225,.16), transparent 34%),
    linear-gradient(155deg, rgba(28,21,53,.98), rgba(10,9,25,.98));
  box-shadow: 0 24px 80px rgba(0,0,0,.52), 0 0 40px rgba(184,147,232,.12);
}
.final-letter-card::before {
  content: '';
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(229,199,121,.16);
  border-radius: 16px;
  pointer-events: none;
}
.final-letter-stars {
  position: relative;
  text-align: center;
  color: var(--gold);
  font-size: .78rem;
  letter-spacing: .22em;
  text-shadow: 0 0 14px var(--gold-glow);
}
.final-letter-title {
  position: relative;
  margin: 8px 0 18px;
  color: #f1d89a;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-align: center;
  text-shadow: 0 0 16px rgba(229,199,121,.28);
}
.final-letter-body {
  position: relative;
  color: rgba(241,235,250,.9);
  font-size: .88rem;
  line-height: 1.95;
  letter-spacing: .025em;
  white-space: pre-line;
  user-select: text;
  -webkit-user-select: text;
}
.final-song-toggle {
  position: relative;
  display: block;
  margin: 18px auto 0;
  padding: 7px 16px;
  border: 0;
  border-radius: 999px;
  background: rgba(229,199,121,.08);
  color: rgba(241,216,154,.82);
  font-family: var(--font-cn);
  font-size: .7rem;
  letter-spacing: .05em;
  cursor: pointer;
}
.final-song-toggle:active { transform: scale(.96); }
.final-song-toggle:disabled {
  color: var(--text-muted);
  cursor: default;
}
.final-letter-close-btn {
  position: relative;
  display: block;
  margin: 12px auto 0;
  border-color: rgba(229,199,121,.36);
  color: #f2dda7;
  background: linear-gradient(135deg, rgba(172,126,204,.28), rgba(195,153,84,.22));
  box-shadow: 0 0 20px rgba(207,184,120,.08);
}

/* 灯箱 */
.lightbox {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity .35s;
}
.lightbox.active { opacity: 1; pointer-events: auto; }
.lightbox-veil {
  position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: rgba(3,3,14,.94);
}
.lightbox-close {
  position: absolute; top: 18px; right: 18px; width: 40px; height: 40px;
  border-radius: 50%; background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.18); color: #fff; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center; cursor: pointer; z-index: 102;
}
.lightbox-close:active { background: rgba(255,255,255,.18); }
.lightbox-content {
  position: relative; z-index: 101;
  display: flex; align-items: center; justify-content: center; gap: 18px;
  max-width: min(1120px, 92vw); max-height: 84vh;
}
.lightbox-content.with-note { align-items: stretch; }
.lightbox-image,
.lightbox-video {
  max-width: 90vw; max-height: 82vh; object-fit: contain;
  border-radius: 6px; box-shadow: 0 0 60px rgba(0,0,0,.6); position: relative;
  background: rgba(0,0,0,.25);
}
.lightbox-content.with-note .lightbox-image {
  width: min(46vw, 520px); height: min(72vh, 620px); object-fit: contain;
}
.lightbox-note {
  width: min(46vw, 520px); height: min(72vh, 620px);
  overflow: auto; padding: 28px 26px;
  border-radius: 6px; color: #5b351c; font-size: .9rem; line-height: 1.9;
  background:
    linear-gradient(rgba(130,85,35,.08) 1px, transparent 1px) 0 26px / 100% 30px,
    #f5dfb9;
  border: 1px solid rgba(118,77,35,.35);
  box-shadow: 0 0 60px rgba(0,0,0,.48);
  white-space: pre-wrap; user-select: text; -webkit-user-select: text;
}
.lightbox-video {
  width: min(86vw, 900px); height: auto;
}

@media (max-width: 720px) {
  .audio-toggle {
    top: max(10px, env(safe-area-inset-top));
    left: max(10px, env(safe-area-inset-left));
    width: 38px;
    height: 38px;
  }
  .progress-hud {
    top: max(10px, env(safe-area-inset-top));
    right: max(10px, env(safe-area-inset-right));
    gap: 6px;
  }
  .progress-pill {
    min-width: 94px;
    padding: 7px 9px;
    font-size: .64rem;
  }
  .lightbox-content { flex-direction: column; gap: 12px; max-height: 88vh; overflow: auto; }
  .lightbox-content.with-note .lightbox-image,
  .lightbox-note {
    width: 88vw; height: auto; max-height: 42vh;
  }
  .final-letter-card {
    width: 92vw;
    max-height: 84vh;
    padding: 24px 20px 21px;
  }
  .final-letter-title { font-size: .98rem; margin-bottom: 15px; }
  .final-letter-body { font-size: .82rem; line-height: 1.88; }
}

/* Toast */
.toast {
  position: fixed; bottom: 50px; left: 50%; transform: translateX(-50%); z-index: 200;
  background: rgba(22,18,40,.94); border: 1px solid rgba(180,150,220,.25);
  border-radius: 12px; padding: 12px 22px; font-size: .72rem;
  color: var(--text-secondary); text-align: center; opacity: 0; pointer-events: none;
  transition: opacity .3s; max-width: 260px;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.toast.show { opacity: 1; }