* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); color: var(--ink); overflow: hidden;
  transition: background-color .9s ease, color .9s ease;
  font-family: 'Inter', system-ui, sans-serif; font-feature-settings: 'cv11', 'ss01'; font-optical-sizing: auto; -webkit-tap-highlight-color: transparent; }

#viewport { position: fixed; inset: 0; display: grid; place-items: center; }

/* Điện thoại cầm dọc: phụ đề của cảnh hiện ở dưới khung slide bằng chữ cỡ thật */
.phonecap { display: none; }
body.portrait.cap-mode .phonecap { display: block; position: fixed; left: 0; right: 0; bottom: 0; top: var(--pc-top, 50vh); z-index: 5;
  padding: 22px 22px 28px; overflow-y: auto; border-top: 1px solid var(--line); }
.pc-t { font-size: 13px; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.pc-t:empty { display: none; }
.pc-c { margin-top: 0; font-size: 19px; font-weight: 400; line-height: 1.55; color: var(--ink); }
.pc-c b { font-weight: 600; color: var(--accent); }
.pc-c:empty { display: none; }
.pc-h { margin-top: 22px; font-size: 13px; color: var(--muted); }
#stage { position: absolute; width: 1920px; height: 1080px; left: 50%; top: 50%;
  transform-origin: 0 0; overflow: hidden; background: var(--bg); transition: background-color .9s ease; }

.layer { position: absolute; inset: 0; opacity: 0; pointer-events: none; transition: opacity .9s ease; }
.layer.on { opacity: 1; pointer-events: auto; }

#layer-scene iframe, #layer-video video { position: absolute; inset: 0; width: 100%; height: 100%;
  border: 0; opacity: 0; transition: opacity .9s ease; background: transparent; }
#layer-scene iframe.on, #layer-video video.on { opacity: 1; }
#layer-video video { object-fit: contain; background: #000; }
/* Video YouTube nhúng: lớp phủ trong suốt chặn mọi cú bấm vào player */
#layer-video .yt { position: absolute; inset: 0; background: #000; opacity: 0; transition: opacity .9s ease; }
#layer-video .yt.on { opacity: 1; }
.yt iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.yt-block { position: absolute; inset: 0; z-index: 2; background: transparent; }
.yt-note { display: none; position: absolute; inset: 0; z-index: 3; place-items: center; text-align: center; padding: 0 80px; font-size: 34px; color: var(--muted, #aaa); }
.yt.failed .yt-note, .yt.preview .yt-note { display: grid; }
.yt.failed iframe, .yt.ended iframe { visibility: hidden; }
.missing { position: absolute; inset: 0; display: grid; place-items: center; text-align: center;
  font-size: 44px; color: var(--muted); background: repeating-linear-gradient(45deg, #101018 0 40px, #0c0c13 40px 80px); }
.missing b { display: block; color: var(--ink); font-size: 64px; margin-bottom: 16px; }

/* ---- Bình chọn ---- */
#layer-poll { display: grid; place-items: center;
  background: radial-gradient(1200px 700px at 15% 10%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 60%),
              radial-gradient(900px 600px at 90% 90%, color-mix(in srgb, var(--accent-2) 20%, transparent), transparent 60%), var(--bg); }
.layer.page { position: fixed; z-index: 2; }
#layer-page iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; opacity: 0; transition: opacity .9s ease; }
#layer-page iframe.on { opacity: 1; }
.poll { width: min(1400px, 92vw); max-height: 100%; overflow-y: auto; padding: 16px 0; }
.poll-q { font-size: clamp(24px, 5.6vmin, 64px); font-weight: 800; line-height: 1.2; margin-bottom: clamp(20px, 5vmin, 56px); text-wrap: balance; }
.poll-opts { display: grid; gap: clamp(10px, 2vmin, 22px); }
.opt { position: relative; display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; width: 100%;
  padding: clamp(14px, 2.4vmin, 26px) clamp(16px, 3vmin, 34px);
  border: 2px solid var(--line); border-radius: 22px; background: var(--card); color: var(--ink);
  font: 600 clamp(17px, 3.6vmin, 40px) 'Inter', sans-serif; text-align: left; cursor: pointer; overflow: hidden; }
.opt .bar { position: absolute; inset: 0 auto 0 0; width: 0;
  background: linear-gradient(90deg, color-mix(in srgb, var(--accent) 45%, transparent), color-mix(in srgb, var(--accent-2) 30%, transparent));
  transition: width .8s cubic-bezier(.2, .8, .2, 1); z-index: 0; }
.opt span, .opt em { position: relative; z-index: 1; }
.opt em { margin-left: auto; font-style: normal; font-weight: 800; font-variant-numeric: tabular-nums; }
.opt.mine { border-color: var(--accent-2); }
/* Công bố kết quả: lựa chọn nhiều nhất nổi lên */
.opt.win { border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 22%, transparent); }
.opt.win span::before { content: '★ '; color: var(--accent); }
.reveal .poll-q::before { content: 'Kết quả: '; color: var(--accent); }
.reveal .opt { transition: border-color .5s, box-shadow .5s; }
.opt.mine::after { content: '✓ bạn chọn'; position: relative; z-index: 1; font-size: .6em; color: var(--accent-2); }
.opt:disabled { cursor: default; }
.poll-total { margin-top: clamp(14px, 2.6vmin, 28px); font-size: clamp(15px, 2.4vmin, 28px); color: var(--muted); }

/* ---- HUD: kho thẻ ---- */
.hud { position: absolute; right: 36px; top: 32px; z-index: 5; opacity: 0; transition: opacity .6s; pointer-events: none; }
.hud.on { opacity: 1; }
.vault-badge { display: flex; align-items: center; gap: 10px; padding: 12px 22px; border-radius: 999px;
  background: rgba(10, 10, 18, .72); border: 1px solid rgba(255, 255, 255, .15); color: #fff; font-size: 26px; backdrop-filter: blur(8px); }
.vault-badge b { min-width: 1.4em; text-align: center; color: var(--accent-2); font-size: 30px; }
.vault-badge.bump { animation: bump .6s ease; }
@keyframes bump { 30% { transform: scale(1.18); } }
.flycard { position: absolute; z-index: 6; left: 50%; top: 58%; transform: translate(-50%, -50%);
  padding: 22px 30px; border-radius: 18px; background: #fff; color: #14121f; font-size: 30px; font-weight: 800;
  box-shadow: 0 30px 80px rgba(0, 0, 0, .5); white-space: nowrap; pointer-events: none;
  animation: fly 1.8s cubic-bezier(.6, 0, .3, 1) forwards; }
.flycard small { display: block; font-size: 18px; font-weight: 600; color: var(--accent); letter-spacing: .08em; text-transform: uppercase; }
@keyframes fly {
  0% { opacity: 0; transform: translate(-50%, -30%) scale(.8) rotate(-4deg); }
  20%, 55% { opacity: 1; transform: translate(-50%, -50%) scale(1) rotate(0); }
  100% { opacity: 0; left: 1800px; top: 50px; transform: translate(-50%, -50%) scale(.15) rotate(8deg); }
}

.paused { position: absolute; left: 36px; top: 28px; font-size: 40px; opacity: 0; transition: opacity .3s; z-index: 5; }
.paused.on { opacity: .7; }

/* ---- Màn tham gia ---- */
.join { position: fixed; inset: 0; z-index: 20; display: grid; place-items: center; padding: 16px;
  color: #fff; background: rgba(20, 14, 40, .82); backdrop-filter: blur(10px); }
.join[hidden] { display: none; }
.join-card { max-width: 440px; text-align: center; }
.join-card h1 { margin: 18px 0 10px; font-size: 34px; }
.join-card p { color: #cfc8ea; line-height: 1.6; margin: 0 0 26px; }
.join-card button, .unmute { font: 700 20px 'Inter', sans-serif; color: #fff; border: 0; cursor: pointer;
  padding: 16px 34px; border-radius: 999px; background: linear-gradient(135deg, var(--accent), #b04bff); }
.join-dot { width: 16px; height: 16px; margin: 0 auto; border-radius: 50%; background: var(--accent-2);
  box-shadow: 0 0 0 0 rgba(45, 226, 196, .6); animation: ping 1.6s infinite; }
@keyframes ping { 70% { box-shadow: 0 0 0 22px rgba(45, 226, 196, 0); } 100% { box-shadow: 0 0 0 0 rgba(45, 226, 196, 0); } }
.unmute { position: fixed; z-index: 15; left: 50%; bottom: 20px; transform: translateX(-50%); font-size: 16px; padding: 12px 22px; }

/* Nút âm lượng nhạc nền của riêng máy này, góc dưới phải: kính mờ, nét mảnh, rê chuột hoặc chạm vào loa thì hiện thanh kéo */
.vol { position: fixed; z-index: 20; right: max(16px, env(safe-area-inset-right)); bottom: max(16px, env(safe-area-inset-bottom));
  display: flex; align-items: center; gap: 6px; padding: 5px; border-radius: 999px;
  background: color-mix(in srgb, var(--bg) 72%, transparent); border: 1px solid var(--line);
  backdrop-filter: blur(14px) saturate(1.2); -webkit-backdrop-filter: blur(14px) saturate(1.2);
  box-shadow: 0 10px 28px -16px rgba(0, 0, 0, .45); transition: opacity .5s, background-color .9s; }
.vol[hidden] { display: none; }
.vol button { width: 36px; height: 36px; padding: 0; border: 0; border-radius: 50%; background: transparent; color: var(--ink);
  display: grid; place-items: center; cursor: pointer; }
.vol button:hover { background: color-mix(in srgb, var(--ink) 8%, transparent); }
.vol svg { width: 20px; height: 20px; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.vol .i-off, .vol.muted .i-on { display: none; }
.vol.muted .i-off { display: block; }
.vol.muted button { color: var(--muted); }
.vol input { width: 0; opacity: 0; margin: 0; accent-color: var(--accent); cursor: pointer; transition: width .35s cubic-bezier(.2, .9, .3, 1), opacity .3s, margin .35s; }
.vol:hover input, .vol.open input, .vol:focus-within input { width: 110px; opacity: 1; margin-left: 10px; }
body.hide-cursor .vol:not(.open) { opacity: .35; }

.conn { position: fixed; z-index: 30; left: 10px; bottom: 10px; width: 12px; height: 12px; border-radius: 50%;
  background: #ff5470; opacity: 0; transition: opacity .3s; }
.conn.on { opacity: 1; }

body.preview .join, body.preview .unmute, body.preview .vol { display: none !important; }
body.hide-cursor, body.hide-cursor * { cursor: none !important; }

/* Hiệu ứng di chuột trên trang khách (máy có chuột) */
@media (hover: hover) and (pointer: fine) {
  .opt { transition: border-color .25s, box-shadow .25s, translate .25s cubic-bezier(.2, .9, .3, 1); }
  .opt:not(:disabled):hover { translate: 0 -3px; border-color: var(--accent); box-shadow: 0 16px 34px -20px var(--accent), 0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent); }
  .join-card button { transition: translate .25s cubic-bezier(.2, .9, .3, 1), box-shadow .25s; }
  .join-card button:hover { translate: 0 -2px; box-shadow: 0 14px 34px -10px var(--accent); }
  .vol { transition: opacity .5s, background-color .9s, box-shadow .25s; }
  .vol:hover { box-shadow: 0 12px 30px -14px var(--accent), 0 0 0 4px color-mix(in srgb, var(--accent) 10%, transparent); }
}


/* ---- Ô nhập tên ---- */
.join-card input { display: block; width: 100%; margin-bottom: 8px; padding: 15px 18px; border-radius: 14px; border: 1px solid rgba(255, 255, 255, .25); background: rgba(255, 255, 255, .1); color: #fff; font: 500 18px 'Inter', sans-serif; text-align: center; outline: none; }
.join-card input::placeholder { color: #bdb6dc; }
.join-card input:focus { border-color: #a99cff; box-shadow: 0 0 0 4px rgba(169, 156, 255, .25); }
.join-err { min-height: 22px; margin-bottom: 10px; font-size: 14px; color: #ffb3c4; }

/* ---- Đố vui ---- */
.layer.page { bottom: 5.8vh; }
#layer-quiz { display: grid; place-items: center; padding: 16px; overflow-y: auto; }
.quiz { width: min(1100px, 100%); }
.q-card, .q-res, .q-sum, .q-board { padding: clamp(20px, 4vmin, 44px); border-radius: 26px; background: var(--card); border: 1px solid var(--line); box-shadow: 0 18px 40px -22px rgba(40, 30, 90, .35); }
.q-k { font-size: clamp(12px, 1.8vmin, 16px); font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--accent); }
.q-prog { display: flex; align-items: center; gap: 14px; font-size: clamp(13px, 2vmin, 18px); font-weight: 600; color: var(--muted); white-space: nowrap; }
.q-prog b { flex: 1; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; display: block; }
.q-prog i { display: block; height: 100%; background: var(--accent); transition: width .4s; }
.q-card h2, .q-sum h2 { margin: clamp(14px, 3vmin, 28px) 0; font-size: clamp(22px, 4.6vmin, 46px); font-weight: 300; line-height: 1.25; letter-spacing: -.01em; }
.q-opts { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 340px), 1fr)); gap: clamp(8px, 1.6vmin, 14px); }
.q-opt { display: flex; align-items: center; gap: 14px; padding: clamp(12px, 2.2vmin, 20px) clamp(14px, 2.4vmin, 22px); border-radius: 16px; border: 1px solid var(--line); background: transparent; color: var(--ink); font: 400 clamp(16px, 2.8vmin, 24px) 'Inter', sans-serif; text-align: left; cursor: pointer; transition: border-color .2s, background .2s, translate .2s; }
.q-opt em { flex: none; width: 1.7em; height: 1.7em; display: grid; place-items: center; border-radius: 50%; font-style: normal; font-weight: 600; font-size: .85em; color: var(--accent); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); }
.q-opt.pick { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.q-opt.pick em { background: var(--accent); color: #fff; }
.q-res { text-align: center; }
.q-res.compact { margin-top: 18px; padding: 16px 20px; }
.q-lv { margin: clamp(8px, 2vmin, 16px) 0 4px; font-size: clamp(42px, 10vmin, 104px); font-weight: 600; letter-spacing: -.03em; line-height: 1.05; color: var(--accent); }
.q-res.compact .q-lv { font-size: clamp(28px, 5vmin, 44px); }
.q-top-badge { display: inline-block; margin: 6px auto 14px; padding: 10px 22px; border-radius: 999px; background: color-mix(in srgb, var(--accent) 16%, transparent); border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent); color: var(--accent); font-size: clamp(15px, 2.5vmin, 23px); font-weight: 600; line-height: 1.35; }
.q-res.compact .q-top-badge { padding: 6px 14px; font-size: clamp(13px, 1.9vmin, 17px); margin: 4px auto 10px; }
.q-res h3 { margin: 0 0 16px; font-size: clamp(18px, 3.2vmin, 30px); font-weight: 400; }
.q-res p { margin: 16px auto 0; max-width: 640px; font-size: clamp(15px, 2.4vmin, 22px); line-height: 1.5; color: var(--muted); }
.q-ladder { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px; }
.q-ladder span { padding: 7px 14px; border-radius: 999px; font-size: clamp(12px, 1.9vmin, 16px); font-weight: 500; color: var(--muted); border: 1px solid var(--line); }
.q-ladder .past { color: var(--accent); }
.q-ladder .on { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }
.q-meta { margin-top: 14px; font-size: clamp(12px, 1.9vmin, 16px); color: var(--muted); font-variant-numeric: tabular-nums; }
.q-retry { margin-top: 16px; padding: 9px 20px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--muted); font: 500 clamp(13px, 1.9vmin, 16px) 'Inter', sans-serif; cursor: pointer; transition: border-color .2s, color .2s; }
.q-retry:hover { border-color: var(--accent); color: var(--accent); }
.q-timer { font-variant-numeric: tabular-nums; font-weight: 700; color: var(--accent); }
.q-timer.low { color: #d6453d; }
.q-prog .q-timer { font-size: clamp(15px, 2.4vmin, 22px); }
.q-note { margin: 0 0 12px; text-align: center; color: var(--muted); font-size: clamp(13px, 2vmin, 17px); }
.q-board { text-align: center; }
.q-board .q-timer.big { display: block; margin: .08em 0; font-size: clamp(90px, 30vmin, 300px); line-height: 1; font-weight: 600; letter-spacing: -.03em; }
.q-board .q-count { font-size: clamp(20px, 4vmin, 40px); }
.q-count { font-size: clamp(14px, 2.2vmin, 20px); color: var(--muted); margin-bottom: 8px; }
.chart { display: block; width: 100%; max-height: 42vh; }
.chart .ax { stroke: var(--line); stroke-width: 1.5; }
.chart .ln { fill: none; stroke: var(--accent); stroke-width: 4; stroke-linejoin: round; stroke-linecap: round; }
.chart .area { fill: color-mix(in srgb, var(--accent) 12%, transparent); }
.chart .dot { fill: var(--card); stroke: var(--accent); stroke-width: 3.5; }
.chart .dot.top { fill: var(--accent); }
.chart text { text-anchor: middle; fill: var(--muted); font-family: 'Inter', sans-serif; }
.chart .v { font-size: 22px; font-weight: 500; fill: var(--ink); }
.chart .v.top { font-size: 28px; font-weight: 700; fill: var(--accent); }
.chart .n { font-size: 18px; font-weight: 500; }

/* Công bố kết quả trên màn hình ngang: đồ thị bên trái, kết quả của mình bên phải */
@media (min-width: 900px) {
  .q-sum:has(.q-res) { display: grid; grid-template-columns: 1.45fr 1fr; column-gap: 30px; align-items: start; }
  .q-sum:has(.q-res) > :not(.q-res) { grid-column: 1; }
  .q-sum .q-res.compact { grid-column: 2; grid-row: 1 / span 4; align-self: center; margin: 0; padding: 26px 20px; }
}

/* Phòng chờ rạp chiếu: phủ kín màn hình, nền tối cho khớp cảnh */
body.rap { background: #0a0814; }
body.rap .layer.page { bottom: 0; }

/* Cảm xúc của khán giả */
.reaction-control { position: fixed; z-index: 21; right: calc(max(16px, env(safe-area-inset-right)) + 54px); bottom: max(16px, env(safe-area-inset-bottom)); transition: right .35s; }
.vol:hover ~ .reaction-control, .vol.open ~ .reaction-control, .vol:focus-within ~ .reaction-control { right: calc(max(16px, env(safe-area-inset-right)) + 174px); }
.reaction-control[hidden], .reaction-picker[hidden] { display: none; }
.reaction-toggle { width: 48px; height: 48px; display: grid; place-items: center; padding: 0; border-radius: 50%; border: 1px solid rgba(255,255,255,.12); color: #fff; background: rgba(30,30,38,.72); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); box-shadow: 0 10px 28px -16px #000; opacity: .35; transition: opacity .2s; cursor: pointer; }
.reaction-control:hover .reaction-toggle, .reaction-control:focus-within .reaction-toggle, .reaction-control.open .reaction-toggle { opacity: 1; }
.reaction-toggle svg { width: 23px; height: 23px; fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.reaction-picker { position: absolute; right: 0; bottom: 56px; display: grid; grid-template-columns: repeat(5,48px); padding: 8px; border-radius: 20px; border: 1px solid rgba(255,255,255,.12); background: rgba(30,30,38,.82); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); box-shadow: 0 12px 36px rgba(0,0,0,.3); animation: picker-in .2s ease-out; }
@keyframes picker-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.reaction-picker button { width: 48px; height: 48px; display: grid; place-items: center; padding: 0; border: 0; border-radius: 12px; background: transparent; cursor: pointer; transition: transform .15s, background .15s; }
.reaction-picker button:hover, .reaction-picker button:focus-visible { transform: scale(1.15); background: rgba(255,255,255,.12); }
.reaction-picker button:active { transform: scale(.88); }
.reaction-picker img { width: 36px; height: 36px; }
.reaction-fly, .reaction-canvas { position: fixed; inset: 0; z-index: 19; pointer-events: none; }
.reaction-fly { overflow: hidden; }
.reaction-item { position: absolute; bottom: 0; width: 60px; height: 60px; animation: reaction-rise 3s ease-out forwards; will-change: transform, opacity; }
.reaction-item img { width: 100%; height: 100%; }
@keyframes reaction-rise { 0% { transform: translate(0,0); opacity: 1; } 25% { transform: translate(-12px,-15vh); } 50% { transform: translate(12px,-30vh); opacity: 1; } 75% { transform: translate(-8px,-45vh); } 100% { transform: translate(8px,var(--rise)); opacity: 0; } }
.reaction-item.dog { width: 78px; height: 78px; animation: dog-dance 3.5s ease-out forwards; }
.reaction-item.dog img { animation: dog-beat .6s steps(2,end) infinite; }
@keyframes dog-dance { 0% { transform: translate(0,0); opacity: 1; } 30% { transform: translate(-25px,-12px); } 60% { transform: translate(20px,-22px); opacity: 1; } 100% { transform: translate(-12px,-45px); opacity: 0; } }
@keyframes dog-beat { 0% { transform: translateY(0) rotate(-12deg) scaleX(1); } 50% { transform: translateY(-18px) rotate(12deg) scaleX(-1); } 100% { transform: translateY(0) rotate(-12deg) scaleX(1); } }
.reaction-note { position: absolute; top: 0; color: white; font-size: 20px; text-shadow: 0 2px 5px #000; animation: note-rise 1.4s ease-out infinite; }
@keyframes note-rise { from { transform: translateY(0); opacity: 1; } to { transform: translateY(-85px); opacity: 0; } }
@media (max-width: 600px) { .reaction-picker { grid-template-columns: repeat(5,44px); } .reaction-picker button { width: 44px; height: 44px; } .reaction-item { width: 44px; height: 44px; } .reaction-item.dog { width: 57px; height: 57px; } }
@media (prefers-reduced-motion: reduce) { .reaction-item, .reaction-item.dog { animation: reaction-fade 3s linear forwards; } .reaction-item.dog img, .reaction-note { animation: none; } @keyframes reaction-fade { from { opacity: 1; } to { opacity: 0; } } }

.vol:hover ~ .reaction-control .reaction-picker, .vol.open ~ .reaction-control .reaction-picker, .vol:focus-within ~ .reaction-control .reaction-picker { right: -120px; }