/* =====================================================================
   Khung giao dien chung cua trang tro choi (bo cuc co san).
   Mau sac lay tu bien --bg1/--bg2/--gold/--gold-2 do admin cau hinh.
   ===================================================================== */

:root {
    /* Font tieu de: Baloo 2 tron tria, co day du dau tieng Viet */
    --font-display: 'Coiny', 'Baloo 2', 'Be Vietnam Pro', 'Segoe UI', system-ui, sans-serif;
    --bg1: #7a0d18;
    --bg2: #2b0308;
    --gold: #ffd45e;
    --gold-2: #ff4d4d;
    --gold-soft: #fff3cd;
    --ink: #fff7e6;
    --panel: rgba(12, 2, 6, .46);
    --radius: 22px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
    margin: 0;
    font-family: 'Be Vietnam Pro', 'Segoe UI', Roboto, system-ui, sans-serif;
    color: var(--ink);
    background: var(--bg2);
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

/* ---------- Cac lop nen ---------- */
.bg-layer { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

/* 1. Nen chuyen sac co chuyen dong nhe */
.bg-grad {
    background:
        radial-gradient(70% 45% at 50% -8%, color-mix(in srgb, var(--gold) 38%, transparent), transparent 68%),
        radial-gradient(60% 45% at 12% 12%, color-mix(in srgb, var(--gold-2) 40%, transparent), transparent 62%),
        radial-gradient(65% 50% at 88% 18%, color-mix(in srgb, var(--gold) 26%, transparent), transparent 64%),
        radial-gradient(120% 95% at 50% 0%, var(--bg1) 0%, var(--bg2) 58%, #0a0104 100%);
}

/* 2. Anh nen do nguoi dung tai len */
.bg-photo {
    background-image: var(--bg-image);
    background-size: cover;
    background-position: center;
    opacity: var(--bg-strength, .38);
}

@media (max-aspect-ratio: 1/1) {
    .bg-photo { background-image: var(--bg-image-m, var(--bg-image)); }
}

/* 3. Quang sang toa tron sau san khau */
.bg-rays {
    background: conic-gradient(from 0deg,
        transparent 0 4%, rgba(255, 231, 165, .2) 5% 8%, transparent 9% 16%,
        rgba(255, 231, 165, .15) 17% 20%, transparent 21% 33%,
        rgba(255, 231, 165, .2) 34% 37%, transparent 38% 50%,
        rgba(255, 231, 165, .15) 51% 54%, transparent 55% 66%,
        rgba(255, 231, 165, .2) 67% 70%, transparent 71% 83%,
        rgba(255, 231, 165, .15) 84% 87%, transparent 88% 100%);
    -webkit-mask-image: radial-gradient(60% 55% at 50% 38%, #000 0%, transparent 72%);
    mask-image: radial-gradient(60% 55% at 50% 38%, #000 0%, transparent 72%);
    animation: rays-spin 60s linear infinite;
}

@keyframes rays-spin { to { transform: rotate(1turn); } }

/* 4. Vet sang nhap nho */
.bg-glow {
    background:
        radial-gradient(38% 30% at 18% 22%, color-mix(in srgb, var(--gold-2) 28%, transparent), transparent 70%),
        radial-gradient(42% 34% at 82% 30%, color-mix(in srgb, var(--gold) 26%, transparent), transparent 72%);
    filter: blur(30px);
    animation: breathe 8s ease-in-out infinite;
}

@keyframes breathe { 0%, 100% { opacity: .5; } 50% { opacity: 1; } }

/* 5. Hat sang / dong xu bay len */
.sparks { position: fixed; inset: 0; overflow: hidden; pointer-events: none; z-index: 1; }

.sparks i {
    position: absolute;
    display: block;
    border-radius: 50%;
    background: radial-gradient(circle at 34% 30%, #fffbe8, var(--gold) 55%, rgba(255, 180, 40, 0) 78%);
    animation: rise linear infinite;
    opacity: .85;
}

.sparks i.coin {
    background: radial-gradient(circle at 34% 28%, #fff6cf, #ffd45e 42%, #d99a12 76%, #a86c06);
    box-shadow: 0 0 10px rgba(255, 200, 80, .55);
    animation-name: rise-spin;
}

@keyframes rise {
    from { transform: translateY(112vh) scale(.55); opacity: 0; }
    18%  { opacity: .9; }
    to   { transform: translateY(-14vh) scale(1.1); opacity: 0; }
}

@keyframes rise-spin {
    from { transform: translateY(112vh) rotateY(0deg) scale(.7); opacity: 0; }
    18%  { opacity: 1; }
    to   { transform: translateY(-14vh) rotateY(900deg) scale(1); opacity: 0; }
}

/* ---------- Khung trang ---------- */
.wrap {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 1180px;
    margin: 0 auto;
    padding: 16px 16px 60px;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    min-height: 44px;
}

.topbar .brand { display: flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .05em; }
.topbar .brand img { height: 42px; width: auto; filter: drop-shadow(0 3px 6px rgba(0, 0, 0, .5)); }

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 15px;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255, 255, 255, .18), rgba(255, 255, 255, .07));
    border: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
    font-size: 13px;
    font-weight: 700;
    color: var(--ink);
    text-decoration: none;
    backdrop-filter: blur(6px);
    transition: transform .15s, box-shadow .15s;
}

.pill:hover { transform: translateY(-2px); box-shadow: 0 6px 16px rgba(0, 0, 0, .35); }

.banner img { width: 100%; border-radius: var(--radius); display: block; margin-bottom: 14px; box-shadow: 0 16px 40px rgba(0, 0, 0, .45); }

/* ---------- Tieu de ----------
   line-height rong + padding tren duoi de dau tieng Viet chong tang
   (A^~, E^?, O^') khong bi cat cut. KHONG dat overflow:hidden o day. */
.headline {
    position: relative;
    text-align: center;
    margin: 6px 0 2px;
    padding: .1em 0 .06em;
    font-family: var(--font-display);
    font-size: clamp(30px, 6.6vw, 66px);
    font-weight: 400;
    line-height: 1.26;
    letter-spacing: .005em;
    overflow: visible;
    /* Lop 1: vet sang chay ngang. Lop 2: mau vang kim */
    background-image:
        linear-gradient(100deg, transparent 42%, rgba(255, 255, 255, .9) 50%, transparent 58%),
        linear-gradient(180deg, #fffdf5 4%, var(--gold-soft) 26%, var(--gold) 56%, #e08a12 88%, #b05e05 100%);
    background-size: 260% 100%, 100% 100%;
    background-position: -160% 0, 0 0;
    background-repeat: no-repeat;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    filter: drop-shadow(0 3px 0 rgba(120, 30, 0, .5)) drop-shadow(0 9px 18px rgba(0, 0, 0, .6));
    animation: shine 5s ease-in-out infinite;
}

@keyframes shine {
    0%, 55% { background-position: -160% 0, 0 0; }
    90%, 100% { background-position: 160% 0, 0 0; }
}

.subline {
    text-align: center;
    margin: 4px 0 16px;
    font-family: var(--font-display);
    font-size: clamp(14px, 2.7vw, 20px);
    font-weight: 400;
    letter-spacing: .08em;
    color: color-mix(in srgb, var(--gold-soft) 85%, #fff);
    text-shadow: 0 2px 10px rgba(0, 0, 0, .5);
}

.countdown { display: flex; justify-content: center; gap: 10px; margin: 0 0 18px; flex-wrap: wrap; }

.countdown b {
    min-width: 68px;
    padding: 9px 10px;
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255, 255, 255, .16), rgba(0, 0, 0, .34));
    border: 1px solid color-mix(in srgb, var(--gold) 50%, transparent);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .25), 0 8px 18px rgba(0, 0, 0, .35);
    font-size: 22px;
    text-align: center;
    display: block;
    color: var(--gold-soft);
    font-variant-numeric: tabular-nums;
}

.countdown b span { display: block; font-size: 10px; font-weight: 600; opacity: .7; letter-spacing: .14em; color: var(--ink); }

/* ---------- Panel kinh mo vien vang ---------- */
.panel {
    position: relative;
    background: linear-gradient(180deg, rgba(255, 255, 255, .1), rgba(0, 0, 0, .3)), var(--panel);
    border-radius: var(--radius);
    padding: 18px;
    backdrop-filter: blur(10px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, .45), inset 0 1px 0 rgba(255, 255, 255, .16);
}

.panel::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1.5px;
    background: linear-gradient(160deg, color-mix(in srgb, var(--gold) 90%, #fff), rgba(255, 212, 94, .12) 40%, color-mix(in srgb, var(--gold-2) 70%, transparent));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.stage { display: grid; grid-template-columns: 1fr; gap: 16px; }

@media (min-width: 940px) {
    .stage.with-side { grid-template-columns: minmax(0, 1fr) 330px; align-items: start; }
}

/* ---------- Bo cuc chia 2 cot: tieu de + qua ben trai, vong quay ben phai ---------- */
.stage.split { gap: 18px; }

@media (min-width: 1000px) {
    .stage.split { grid-template-columns: minmax(0, 1fr) minmax(0, 1.06fr); align-items: center; }
}

.hero-left { display: flex; flex-direction: column; gap: 14px; }

.hero-left .headline {
    text-align: left;
    margin: 0;
    font-size: clamp(30px, 5vw, 62px);
}

.hero-left .subline { text-align: left; margin: 0; }
.hero-left .countdown { justify-content: flex-start; margin: 0; }

@media (max-width: 999px) {
    .hero-left .headline,
    .hero-left .subline { text-align: center; }
    .hero-left .countdown { justify-content: center; }
}

/* Bang gioi thieu qua tang ben trai */
.gift-showcase { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 10px; }

.gift-chip {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 9px 12px;
    border-radius: 999px;
    background: linear-gradient(100deg, rgba(255, 255, 255, .16), rgba(255, 255, 255, .05));
    border: 1px solid color-mix(in srgb, var(--gold) 45%, transparent);
    font-size: 13.5px;
    font-weight: 700;
    box-shadow: 0 6px 16px rgba(0, 0, 0, .3);
}

.gift-chip img { width: 30px; height: 30px; object-fit: contain; }
.gift-chip .dot { width: 12px; height: 12px; border-radius: 50%; box-shadow: 0 0 8px currentColor; flex: 0 0 auto; }

/* ---------- Nut chinh ---------- */
.btn-main {
    position: relative;
    display: block;
    width: 100%;
    max-width: 360px;
    margin: 20px auto 0;
    padding: 15px 22px;
    border: 0;
    border-radius: 999px;
    font-family: var(--font-display);
    font-size: 23px;
    font-weight: 400;
    line-height: 1.35;
    letter-spacing: .04em;
    color: #4a1207;
    cursor: pointer;
    overflow: hidden;
    background: linear-gradient(180deg, #fff6d8, var(--gold) 42%, #ef9f18 100%);
    box-shadow: 0 9px 0 #a8620f, 0 18px 34px rgba(0, 0, 0, .5), inset 0 2px 0 rgba(255, 255, 255, .7);
    transition: transform .12s, box-shadow .12s, filter .2s;
    text-transform: uppercase;
}

.btn-main::after {
    content: '';
    position: absolute;
    top: 0; left: -60%;
    width: 40%; height: 100%;
    background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .85), transparent);
    transform: skewX(-18deg);
    animation: btn-shine 3.2s ease-in-out infinite;
}

@keyframes btn-shine {
    0%, 55% { left: -60%; }
    85%, 100% { left: 120%; }
}

.btn-main:hover:not(:disabled) { filter: brightness(1.07); }
.btn-main:active:not(:disabled) { transform: translateY(7px); box-shadow: 0 2px 0 #a8620f, 0 8px 18px rgba(0, 0, 0, .45); }
.btn-main:disabled { opacity: .55; cursor: not-allowed; box-shadow: 0 6px 0 #7a4a12; }
.btn-main:disabled::after { display: none; }

.btn-ghost {
    display: inline-block;
    padding: 11px 20px;
    border-radius: 999px;
    border: 1.5px solid color-mix(in srgb, var(--gold) 60%, transparent);
    background: rgba(255, 255, 255, .07);
    color: var(--ink);
    font: inherit;
    font-weight: 700;
    cursor: pointer;
    transition: background .2s, transform .15s;
}

.btn-ghost:hover { background: rgba(255, 255, 255, .16); transform: translateY(-2px); }

/* ---------- Form tham gia ---------- */
.joinbox { max-width: 480px; margin: 0 auto; text-align: center; }

.joinbox label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .1em;
    text-transform: uppercase;
    margin: 12px 0 7px;
    color: var(--gold);
    text-align: left;
}

.joinbox input {
    width: 100%;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1.5px solid color-mix(in srgb, var(--gold) 55%, transparent);
    background: rgba(0, 0, 0, .38);
    color: #fff;
    font-size: 17px;
    outline: none;
    transition: border-color .2s, box-shadow .2s;
}

.joinbox input::placeholder { color: rgba(255, 247, 230, .38); }
.joinbox input:focus { border-color: var(--gold); box-shadow: 0 0 0 4px color-mix(in srgb, var(--gold) 20%, transparent); }
.joinbox input.code-input { text-align: center; letter-spacing: .3em; font-weight: 800; text-transform: uppercase; }

.hint { font-size: 14px; opacity: .85; margin-top: 12px; min-height: 20px; font-weight: 600; }
.hint.err { color: #ffb0b0; opacity: 1; }
.hint.ok { color: #b7f5c1; opacity: 1; }

.turns {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    padding: 9px 20px;
    border-radius: 999px;
    background: linear-gradient(180deg, rgba(255, 255, 255, .14), rgba(0, 0, 0, .36));
    border: 1px solid color-mix(in srgb, var(--gold) 55%, transparent);
    font-weight: 700;
    margin: 6px auto 0;
    box-shadow: 0 6px 16px rgba(0, 0, 0, .3);
}

.turns b { color: var(--gold); font-size: 22px; }

/* ---------- Tieu de trong panel ---------- */
.panel h3 {
    position: relative;
    margin: 0 0 14px;
    padding-bottom: 10px;
    font-family: var(--font-display);
    font-size: 19px;
    font-weight: 400;
    line-height: 1.4;
    letter-spacing: .04em;
    color: var(--gold);
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 0, 0, .45);
}

.panel h3::after {
    content: '';
    position: absolute;
    left: 50%; bottom: 0;
    transform: translateX(-50%);
    width: 66%; height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold), transparent);
}

/* ---------- Danh sach giai ---------- */
.prize-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; counter-reset: pz; }

.prize-list li {
    display: flex;
    align-items: center;
    gap: 11px;
    padding: 10px 12px;
    border-radius: 14px;
    background: linear-gradient(100deg, rgba(255, 255, 255, .13), rgba(255, 255, 255, .05));
    border: 1px solid rgba(255, 255, 255, .1);
    font-size: 14.5px;
    font-weight: 600;
    counter-increment: pz;
    transition: transform .15s, border-color .15s;
}

.prize-list li:hover { transform: translateX(3px); border-color: color-mix(in srgb, var(--gold) 55%, transparent); }

.prize-list li::before {
    content: counter(pz);
    flex: 0 0 auto;
    width: 24px; height: 24px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 12px;
    font-weight: 800;
    color: #4a1207;
    background: linear-gradient(180deg, #fff3cd, var(--gold));
}

.prize-list li:nth-child(1)::before { background: linear-gradient(180deg, #fff6d8, #ffbe0b); box-shadow: 0 0 12px rgba(255, 190, 11, .6); }
.prize-list li:nth-child(2)::before { background: linear-gradient(180deg, #f4f7fb, #b9c6d4); }
.prize-list li:nth-child(3)::before { background: linear-gradient(180deg, #ffd8a8, #d98a3d); }

.prize-list li img { width: 36px; height: 36px; object-fit: contain; border-radius: 9px; }
.prize-list li .dot { width: 13px; height: 13px; border-radius: 50%; flex: 0 0 auto; box-shadow: 0 0 8px currentColor; }

/* ---------- Bang nguoi trung ---------- */
.winner-feed { list-style: none; margin: 0; padding: 0; max-height: 290px; overflow: auto; display: grid; gap: 7px; }

.winner-feed li {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    font-size: 13.5px;
    padding: 9px 12px;
    border-radius: 12px;
    background: linear-gradient(100deg, rgba(255, 255, 255, .12), rgba(255, 255, 255, .04));
    animation: fadein .4s ease;
}

@keyframes fadein { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }

.winner-feed li em { font-style: normal; opacity: .9; }
.winner-feed li span { color: var(--gold); font-weight: 800; text-align: right; }

.rules { font-size: 14.5px; line-height: 1.75; white-space: pre-line; opacity: .94; }

/* ---------- Marquee ---------- */
.marquee {
    position: relative;
    overflow: hidden;
    margin: 16px 0 0;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(0, 0, 0, .45), rgba(0, 0, 0, .28), rgba(0, 0, 0, .45));
    border: 1px solid color-mix(in srgb, var(--gold) 35%, transparent);
    padding: 10px 0;
    font-size: 13.5px;
    font-weight: 600;
}

.marquee div { display: inline-block; white-space: nowrap; padding-left: 100%; animation: slide 28s linear infinite; }
.marquee b { color: var(--gold); }
@keyframes slide { to { transform: translateX(-100%); } }

/* ---------- Modal ket qua ---------- */
.modal {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: rgba(6, 0, 2, .8);
    backdrop-filter: blur(5px);
}

.modal.show { display: flex; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }

.modal-card {
    position: relative;
    width: 100%;
    max-width: 420px;
    text-align: center;
    padding: 34px 26px 28px;
    border-radius: 26px;
    background: linear-gradient(180deg, #c31d33, #6d0813 60%, #47060d);
    border: 2px solid var(--gold);
    box-shadow: 0 0 0 7px rgba(255, 212, 94, .13), 0 30px 70px rgba(0, 0, 0, .65);
    animation: pop .45s cubic-bezier(.2, 1.4, .5, 1);
    overflow: hidden;
}

@keyframes pop { from { transform: scale(.55) translateY(30px); opacity: 0; } to { transform: none; opacity: 1; } }

.modal-card::before {
    content: '';
    position: absolute;
    inset: -60%;
    background: conic-gradient(from 0deg, transparent 0 6%, rgba(255, 233, 168, .22) 8%, transparent 11% 25%,
        rgba(255, 233, 168, .22) 27%, transparent 30% 50%, rgba(255, 233, 168, .22) 52%,
        transparent 55% 75%, rgba(255, 233, 168, .22) 77%, transparent 80%);
    animation: spin-slow 12s linear infinite;
    z-index: 0;
}

@keyframes spin-slow { to { transform: rotate(1turn); } }

.modal-card > * { position: relative; z-index: 1; }

.modal-card h2 {
    margin: 0 0 4px;
    font-family: var(--font-display);
    font-size: 30px;
    font-weight: 400;
    line-height: 1.35;
    color: var(--gold);
    letter-spacing: .02em;
    text-shadow: 0 3px 12px rgba(0, 0, 0, .5);
}

.modal-card .prize-name {
    font-family: var(--font-display);
    font-size: 29px;
    font-weight: 400;
    margin: 12px 0 6px;
    line-height: 1.4;
    background: linear-gradient(180deg, #fffdf5, var(--gold) 60%, #e08a12);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.modal-card .prize-sub { font-size: 14px; opacity: .88; }
.modal-card img.prize-img { width: 140px; height: 140px; object-fit: contain; margin: 6px auto; display: block; filter: drop-shadow(0 12px 20px rgba(0, 0, 0, .55)); animation: bob 2.6s ease-in-out infinite; }

@keyframes bob { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

.modal-card p.msg { font-size: 14.5px; line-height: 1.65; opacity: .94; margin: 14px 0 0; white-space: pre-line; }
.modal-card .btn-main { margin-top: 22px; }

#confetti { position: fixed; inset: 0; pointer-events: none; z-index: 70; }

.foot { text-align: center; font-size: 12.5px; opacity: .62; margin-top: 30px; }
.foot a { color: inherit; }

.closed-note {
    text-align: center;
    padding: 15px;
    border-radius: 16px;
    background: rgba(0, 0, 0, .45);
    border: 1px dashed color-mix(in srgb, var(--gold) 60%, transparent);
    font-weight: 700;
    margin-bottom: 16px;
}

.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- Anh trang tri hai ben (linh vat) ---------- */
.mascot {
    position: fixed;
    bottom: 0;
    z-index: 1;
    width: clamp(120px, 17vw, 280px);
    pointer-events: none;
    filter: drop-shadow(0 10px 24px rgba(0, 0, 0, .5));
    animation: bob 4.5s ease-in-out infinite;
}

.mascot.left { left: 6px; }
.mascot.right { right: 6px; animation-delay: -2.2s; }

@media (max-width: 1100px) { .mascot { display: none; } }