:root {
    --overlay-base: rgba(15, 23, 42, 0.55);
    --card-bg: rgba(15, 23, 42, 0.82);
    --highlight: #38bdf8;
    --text-primary: #f8fafc;
    --text-secondary: rgba(226, 232, 240, 0.82);
    --divider: rgba(255, 255, 255, 0.08);
    --card-max-width: 640px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: 'Noto Sans KR', Arial, sans-serif;
    line-height: 1.55;
    color: var(--text-primary);
    background-color: #000;
}

#background-container {
    position: fixed;
    inset: 0;
    z-index: -2;
    overflow: hidden;
    background-color: #020617;
}

#background-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, rgba(8, 47, 73, 0.6), rgba(15, 23, 42, 0.32));
    z-index: 1;
}

.background-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.overlay {
    position: relative;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: clamp(2.25rem, 7vh, 3.5rem) 1.5rem;
    background: linear-gradient(165deg, rgba(2, 6, 23, 0.45), rgba(15, 23, 42, 0.08));
}

.overlay-card {
    width: 100%;
    max-width: var(--card-max-width);
    padding: clamp(2.4rem, 6vw, 2.95rem) clamp(2rem, 5vw, 2.6rem);
    background: var(--card-bg);
    border-radius: 26px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    box-shadow: 0 32px 120px rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(16px);
    display: grid;
    gap: clamp(1.6rem, 4vw, 2.2rem);
    text-align: left;
}

.intro {
    display: grid;
    gap: 0.75rem;
    justify-items: center;
    text-align: center;
}

.brand-logo {
    display: block;
    margin: 0 auto 0.75rem;
}

.brand-tagline {
    margin: 0;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.headline {
    margin: 0;
    font-size: clamp(1.7rem, 2.6vw, 2.4rem);
    font-weight: 900;
    line-height: 1.2;
    text-shadow: 0 10px 24px rgba(2, 6, 23, 0.55);
    max-width: 24ch;
}

.subtitle {
    margin: 0 auto;
    max-width: 34ch;
    font-size: 1rem;
    color: rgba(226, 232, 240, 0.88);
    line-height: 1.7;
    text-align: center;
}

.countdown-container {
    padding: 1.75rem 1.4rem;
    text-align: center;
    border-radius: 20px;
    background: linear-gradient(140deg, rgba(13, 148, 196, 0.42), rgba(14, 165, 233, 0.16));
    border: 1px solid rgba(125, 211, 252, 0.22);
    backdrop-filter: blur(10px);
}

.countdown-title {
    margin: 0 0 1rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(224, 242, 254, 0.9);
}

.countdown {
    display: flex;
    justify-content: flex-start;
    gap: 1rem;
    flex-wrap: wrap;
}

.countdown-item {
    width: min(108px, 100%);
    padding: 0.85rem 0.5rem;
    border-radius: 18px;
    background: rgba(15, 23, 42, 0.62);
    border: 1px solid rgba(100, 116, 139, 0.3);
    box-shadow: inset 0 8px 24px rgba(15, 23, 42, 0.5);
}

.countdown-number {
    display: block;
    font-size: clamp(2.15rem, 6vw, 2.45rem);
    font-weight: 700;
    letter-spacing: 0.06em;
    color: var(--text-primary);
}

.countdown-label {
    display: block;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: rgba(203, 213, 225, 0.85);
}

.cta {
    display: grid;
    gap: 0.6rem;
    place-items: center;
    margin-top: 0.5rem;
    padding-top: 1.6rem;
    border-top: 1px solid var(--divider);
}


.cta-text {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    text-align: center;
}

.cta-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0.75rem auto 0;
    padding: 0.85rem 2.4rem;
    border-radius: 999px;
    font-weight: 700;
    letter-spacing: 0.06em;
    background: linear-gradient(90deg, #0ea5e9, #38bdf8);
    color: #0b1120;
    text-decoration: none;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}


.cta-link:hover,
.cta-link:focus {
    transform: translateY(-2px);
    box-shadow: 0 18px 40px rgba(14, 165, 233, 0.45);
    color: #0b1120;
}

@media (max-width: 720px) {
    .overlay-card {
        text-align: center;
    }

    .intro {
        justify-items: center;
    }

    .brand-logo {
        margin: 0 auto 1rem;
    }

    .subtitle {
        margin: 0 auto;
    }

    .countdown {
        justify-content: center;
    }

    .cta {
        text-align: center;
    }
}

@media (max-width: 600px) {
    .overlay-card {
        padding: 2.4rem 1.6rem;
        border-radius: 22px;
    }

    .countdown-item {
        width: calc(50% - 0.6rem);
    }

    .countdown-number {
        font-size: 2rem;
    }

    .cta {
        margin-top: 2rem;
        padding-top: 1.5rem;
    }
}

@media (max-width: 360px) {
    .countdown {
        gap: 0.75rem;
    }

    .countdown-item {
        width: 100%;
    }
}

/* ===== Coming Soon 카드·카운트다운 오버라이드 ===== */
:root {
    --bg-top: #0a0f1e;
    --bg-bottom: #0a1326;
    --ink: #e5e7eb;
    --muted: #a9b7ce;
    --brand: #93c5fd;
    --accent: #7dd3fc;
    --warn: #fbbf24;
    --panel-a: rgba(17, 24, 39, .85);
    --panel-b: rgba(2, 6, 23, .78);
    --stroke: rgba(255, 255, 255, .08);
    --tile-stroke: rgba(255, 255, 255, .06);
}

body {
    color: var(--ink);
    background: linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.overlay {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(120% 120% at 10% -10%, rgba(59, 130, 246, .14), transparent 60%),
        radial-gradient(120% 120% at 120% 10%, rgba(56, 189, 248, .12), transparent 60%);
}

.overlay-card {
    width: 100%;
    max-width: 960px;
    padding: clamp(20px, 3vw, 40px);
    background: linear-gradient(180deg, var(--panel-a), var(--panel-b));
    border: 1px solid var(--stroke);
    border-radius: 22px;
    box-shadow: 0 24px 60px rgba(0, 0, 0, .5), inset 0 1px 0 rgba(255, 255, 255, .06);
    backdrop-filter: blur(10px);
}

.brand-tagline {
    color: var(--brand);
    font-weight: 800;
    letter-spacing: .3px;
}

.headline {
    color: #f1f5f9;
    font-weight: 900;
    font-size: clamp(1.25rem, 2.4vw, 1.7rem);
    margin: 8px 0 6px;
}

.subtitle {
    color: #9fb3c8;
}

/* 카드 안의 카운트다운 판 */
.countdown-container {
    margin-top: 18px;
    padding: 24px;
    border-radius: 18px;
    background:
        radial-gradient(120% 120% at 0% 0%, rgba(59, 130, 246, .22), rgba(14, 23, 42, .36) 70%),
        linear-gradient(180deg, rgba(30, 41, 59, .78), rgba(2, 6, 23, .78));
    border: 1px solid var(--stroke);
    box-shadow: 0 14px 30px rgba(2, 6, 23, .6), inset 0 1px 0 rgba(255, 255, 255, .06);
}

.countdown-title {
    text-align: center;
    margin: 0 0 6px;
    color: #cbd5e1;
    letter-spacing: .18em;
}

.notice-text {
    color: #e2e8f0;
    font-weight: 800;
    letter-spacing: .02em;
    margin-bottom: 14px;
}

.countdown {
    display: flex;
    gap: 14px;
    justify-content: space-between;
}

.countdown-item {
    flex: 1 1 0;
    min-width: 96px;
    text-align: center;
    padding: 18px 14px;
    background: linear-gradient(180deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .02));
    border: 1px solid var(--tile-stroke);
    border-radius: 16px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06), 0 12px 18px rgba(2, 6, 23, .5);
}

.countdown-number {
    display: block;
    font-variant-numeric: tabular-nums;
    font-weight: 900;
    font-size: clamp(28px, 7vw, 44px);
    line-height: 1;
    letter-spacing: .02em;
    color: #f8fafc;
    text-shadow: 0 8px 22px rgba(0, 0, 0, .35);
    margin-bottom: 8px;
}

.countdown-label {
    display: block;
    text-transform: uppercase;
    letter-spacing: .2em;
    font-size: .72rem;
    color: var(--muted);
}

/* 공지/CTA */
.notice .notice-text {
    color: var(--warn);
    background: rgba(251, 191, 36, .1);
    border: 1px solid rgba(251, 191, 36, .25);
    padding: 10px 14px;
    border-radius: 12px;
}

.cta {
    margin-top: 14px;
    text-align: center;
}

.cta-link {
    display: inline-block;
    text-decoration: none;
    color: var(--accent);
    font-weight: 800;
    letter-spacing: .02em;
    padding: 10px 14px;
    border-radius: 12px;
    border: 1px solid rgba(125, 211, 252, .35);
    backdrop-filter: blur(4px);
    transition: transform .2s, background .2s, box-shadow .2s;
}

.cta-link:hover {
    transform: translateY(-1px);
    background: rgba(125, 211, 252, .08);
    box-shadow: 0 6px 18px rgba(2, 6, 23, .5);
}

/* 모바일: 2x2 그리드 */
@media (max-width:640px) {
    .overlay-card {
        padding: 18px;
    }

    .countdown {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .countdown-item {
        min-width: 0;
    }
}