:root {
    --bg: #080b10;
    --surface: rgba(17, 24, 39, 0.86);
    --surface-strong: rgba(24, 32, 45, 0.94);
    --line: rgba(246, 247, 242, 0.12);
    --line-strong: rgba(77, 208, 225, 0.32);
    --text: #f6f7f2;
    --muted: #9ba7b4;
    --cyan: #4dd0e1;
    --green: #35d07f;
    --red: #ff5f6d;
    --amber: #ffb84d;
    --violet: #a78bfa;
    --shadow: 0 24px 80px rgba(0, 0, 0, 0.42);
    --radius: 8px;
}

* { box-sizing: border-box; }

html { color-scheme: dark; }

body {
    margin: 0;
    min-height: 100vh;
    background: var(--bg);
    color: var(--text);
    font-family: "Noto Sans SC", sans-serif;
    letter-spacing: 0;
}

a { color: inherit; }

button, input, select {
    font: inherit;
}

.wallpaper-layer {
    position: fixed;
    inset: 0;
    z-index: -3;
    background-image: linear-gradient(90deg, rgba(8, 11, 16, 0.88), rgba(8, 11, 16, 0.72)), var(--wallpaper-url);
    background-size: cover;
    background-position: center;
    filter: saturate(0.7) contrast(1.05);
}

.signal-grid {
    position: fixed;
    inset: 0;
    z-index: -2;
    pointer-events: none;
    background:
        linear-gradient(rgba(77, 208, 225, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(77, 208, 225, 0.05) 1px, transparent 1px),
        radial-gradient(circle at 80% 12%, rgba(77, 208, 225, 0.15), transparent 28%),
        radial-gradient(circle at 16% 86%, rgba(167, 139, 250, 0.14), transparent 24%);
    background-size: 48px 48px, 48px 48px, auto, auto;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.55));
}

.site-shell::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background: linear-gradient(180deg, transparent 0%, rgba(77, 208, 225, 0.08) 50%, transparent 100%);
    animation: scan 9s linear infinite;
}

.topbar, .admin-rail, .admin-panel, .site-card, .auth-card, .complete-card, .certificate, .panel-form, .stats-panel {
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
}

.topbar {
    position: sticky;
    top: 16px;
    z-index: 20;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: min(1180px, calc(100% - 32px));
    margin: 16px auto 0;
    padding: 12px 14px;
    border-radius: var(--radius);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text);
    text-decoration: none;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--line-strong);
    background: linear-gradient(135deg, rgba(77, 208, 225, 0.22), rgba(53, 208, 127, 0.12));
    border-radius: 6px;
    color: var(--cyan);
    font-family: "Fira Code", monospace;
    font-weight: 700;
}

.brand strong, .brand small { display: block; }
.brand small { color: var(--muted); font-family: "Fira Code", monospace; font-size: 0.72rem; }

.nav-links, .admin-nav, .hero-actions, .card-actions, .record-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}

.nav-links a, .admin-nav a {
    color: var(--muted);
    text-decoration: none;
    padding: 8px 10px;
    border-radius: 6px;
    transition: color 180ms ease, background 180ms ease;
}

.nav-links a:hover, .admin-nav a:hover {
    color: var(--text);
    background: rgba(246, 247, 242, 0.08);
}

.page-wrap {
    width: min(1180px, calc(100% - 32px));
    margin: 56px auto 80px;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 28px;
    align-items: end;
    margin-bottom: 34px;
}

.compact-hero {
    align-items: center;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--cyan);
    font-family: "Fira Code", monospace;
    font-size: 0.78rem;
    text-transform: uppercase;
}

h1, h2, h3, p { text-wrap: pretty; }
h1 { margin: 0; font-size: clamp(2.3rem, 6vw, 5rem); line-height: 0.96; font-weight: 900; }
h2 { margin: 0; font-size: clamp(1.5rem, 3vw, 2.2rem); }
h3 { margin: 14px 0 6px; font-size: 1.28rem; }

.hero-copy {
    max-width: 680px;
    color: var(--muted);
    font-size: 1.05rem;
    line-height: 1.8;
}

.primary-button, .ghost-button, .danger-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 10px 14px;
    border: 1px solid transparent;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 180ms ease;
}

.primary-button {
    color: #04110c;
    background: var(--green);
    font-weight: 700;
}

.ghost-button {
    color: var(--text);
    background: rgba(246, 247, 242, 0.06);
    border-color: var(--line);
}

.danger-button {
    color: var(--text);
    background: rgba(255, 95, 109, 0.16);
    border-color: rgba(255, 95, 109, 0.42);
}

.primary-button:hover, .ghost-button:hover, .danger-button:hover {
    transform: translateY(-1px);
}

.stats-panel, .metric-grid {
    display: grid;
    gap: 12px;
}

.stats-panel {
    grid-template-columns: repeat(3, 1fr);
    padding: 18px;
    border-radius: var(--radius);
}

.stats-panel div, .metric-grid div {
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: rgba(8, 11, 16, 0.38);
}

.stats-panel strong, .metric-grid strong {
    display: block;
    color: var(--text);
    font-family: "Fira Code", monospace;
    font-size: 2rem;
}

.stats-panel span, .metric-grid span {
    color: var(--muted);
}

.metric-grid {
    grid-template-columns: repeat(4, 1fr);
    margin-bottom: 26px;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: end;
    margin: 28px 0 18px;
}

.site-list, .record-list {
    display: grid;
    gap: 14px;
}

.site-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 20px;
    border-radius: var(--radius);
}

.site-card p, .auth-card p, .complete-card p, .admin-hero p {
    margin: 0;
    color: var(--muted);
    line-height: 1.7;
}

.code-pill, .status-badge {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 4px 9px;
    border: 1px solid var(--line-strong);
    border-radius: 5px;
    color: var(--cyan);
    background: rgba(77, 208, 225, 0.1);
    font-family: "Fira Code", monospace;
    font-size: 0.82rem;
}

.legend {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    color: var(--muted);
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.available { --slot: var(--green); }
.registered { --slot: var(--red); }
.pending { --slot: var(--amber); }
.reserved { --slot: var(--violet); }
.dot.available { background: var(--green); }
.dot.registered { background: var(--red); }
.dot.pending { background: var(--amber); }
.dot.reserved { background: var(--violet); }

.pool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(94px, 1fr));
    gap: 10px;
}

.slot {
    position: relative;
    display: grid;
    place-items: center;
    min-height: 86px;
    aspect-ratio: 1 / 1;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--slot) 55%, transparent);
    border-radius: 6px;
    background:
        radial-gradient(circle at var(--mx, 50%) var(--my, 50%), color-mix(in srgb, var(--slot) 28%, transparent), transparent 34%),
        rgba(17, 24, 39, 0.76);
    color: var(--text);
    text-decoration: none;
}

.slot .mono {
    font-family: "Fira Code", monospace;
    color: var(--slot);
    font-weight: 700;
}

.slot small { color: var(--muted); }
.slot.disabled { cursor: not-allowed; opacity: 0.72; }
.slot.tiny { min-height: 34px; aspect-ratio: 1 / 1; font-family: "Fira Code", monospace; font-size: 0.8rem; }

.form-shell {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 480px);
    gap: 34px;
    align-items: start;
}

.panel-form {
    display: grid;
    gap: 14px;
    padding: 20px;
    border-radius: var(--radius);
}

label {
    display: grid;
    gap: 7px;
    color: var(--muted);
}

input, select {
    width: 100%;
    min-height: 42px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: rgba(8, 11, 16, 0.72);
    color: var(--text);
    padding: 10px 11px;
    outline: none;
}

input:focus-visible, select:focus-visible, button:focus-visible, a:focus-visible {
    outline: 2px solid var(--cyan);
    outline-offset: 3px;
}

.alert {
    border: 1px solid rgba(255, 184, 77, 0.42);
    border-radius: 6px;
    background: rgba(255, 184, 77, 0.12);
    color: var(--text);
    padding: 10px 12px;
}

.alert p { margin: 0; }

.empty-state, .complete-card, .certificate {
    padding: 28px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--line);
}

.mono { font-family: "Fira Code", monospace; }
.center { text-align: center; }

.certificate {
    max-width: 760px;
    margin: 0 auto;
}

.certificate-head {
    display: flex;
    justify-content: space-between;
    gap: 18px;
    align-items: start;
    border-bottom: 1px solid var(--line);
    padding-bottom: 20px;
}

.cert-grid {
    display: grid;
    gap: 12px;
    margin: 24px 0;
}

.cert-grid div {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
}

dt { color: var(--muted); }
dd { margin: 0; }
.cert-foot { color: var(--muted); text-align: center; }

.auth-wrap {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 24px;
}

.auth-card {
    width: min(460px, 100%);
    padding: 26px;
    border-radius: var(--radius);
}

.admin-shell {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
}

.admin-rail {
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 18px;
    border-radius: 0;
}

.brand.compact {
    margin-bottom: 28px;
}

.admin-nav {
    align-items: stretch;
    flex-direction: column;
}

.full { width: 100%; margin-top: 24px; }
.admin-main { padding: 28px; }

.admin-hero {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: end;
    margin-bottom: 22px;
}

.reserve-form {
    display: grid;
    grid-template-columns: 90px 180px auto;
    gap: 10px;
}

.admin-panel {
    padding: 18px;
    border-radius: var(--radius);
    margin-top: 20px;
}

.admin-pool {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(34px, 1fr));
    gap: 7px;
}

.record-list {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.record-card {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: rgba(8, 11, 16, 0.42);
    padding: 16px;
}

.record-title, .split-actions {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 14px;
}

.record-form {
    display: grid;
    gap: 12px;
}

.status-badge.registered, .code-pill.registered { color: var(--red); border-color: rgba(255, 95, 109, 0.48); background: rgba(255, 95, 109, 0.1); }
.status-badge.pending { color: var(--amber); border-color: rgba(255, 184, 77, 0.48); background: rgba(255, 184, 77, 0.1); }
.status-badge.reserved { color: var(--violet); border-color: rgba(167, 139, 250, 0.48); background: rgba(167, 139, 250, 0.1); }

@keyframes scan {
    from { transform: translateY(-100%); }
    to { transform: translateY(100%); }
}

@media (max-width: 860px) {
    .topbar, .site-card, .admin-hero {
        align-items: stretch;
        flex-direction: column;
    }

    .hero, .form-shell, .admin-shell {
        grid-template-columns: 1fr;
    }

    .admin-rail {
        position: static;
        height: auto;
    }

    .metric-grid, .stats-panel {
        grid-template-columns: repeat(2, 1fr);
    }

    .reserve-form {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 520px) {
    .page-wrap, .topbar {
        width: min(100% - 20px, 1180px);
    }

    h1 { font-size: 2.35rem; }
    .metric-grid, .stats-panel { grid-template-columns: 1fr; }
    .pool-grid { grid-template-columns: repeat(3, 1fr); }
    .cert-grid div { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation: none !important;
        transition: none !important;
    }
}