:root {
    --bg: #0d0d0d;
    --surface: #1c1c1e;
    --surface2: #2c2c2e;
    --accent: #0a84ff;
    --accent2: #30d158;
    --danger: #ff453a;
    --warning: #ff9f0a;
    --text: #ffffff;
    --text2: #ababab;
    --text3: #ffffff;
    --border: #38383a;
    --tab-h: 56px;
    --safe-bottom: env(safe-area-inset-bottom, 0px);
}

html.light-theme {
    --bg: #ffffff;
    --surface: #f2f2f7;
    --surface2: #e5e5ea;
    --text: #000000;
    --text2: #000000;
    --text3: #000000;
    --border: #c6c6c8;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    -webkit-font-smoothing: antialiased;
    background: var(--bg);
    color: var(--text);
}

#app {
    display: flex;
    flex-direction: column;
    height: 100dvh;
}

/* Header */
#header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg);
    position: relative;
}

#header h1 {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

/* Content */
#content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 16px;
}

/* Bottom Tab Nav */
#tabs {
    display: flex;
    background: var(--surface);
    border-top: 1px solid var(--border);
    height: calc(var(--tab-h) + var(--safe-bottom));
    padding-bottom: var(--safe-bottom);
}

.tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    text-decoration: none;
    color: var(--text3);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 6px 0;
    transition: color 0.2s;
}

.tab.active { color: var(--accent); }
.tab:hover { color: var(--text2); }

/* Flash messages */
.flash {
    padding: 12px 14px;
    border-radius: 10px;
    margin-bottom: 12px;
    font-size: 0.85rem;
    font-weight: 500;
}

.flash-success { background: #248a3d; color: #ffffff; }
.flash-error   { background: #c0392b; color: #ffffff; }
.flash-warning { background: #c47a00; color: #ffffff; }

/* Cards */
.card {
    background: var(--surface);
    border-radius: 12px;
    margin-bottom: 2px;
    overflow: hidden;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 14px;
    cursor: pointer;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 600;
    flex: 1;
}

.card-meta {
    font-size: 0.85rem;
    color: var(--text2);
    margin-left: 12px;
    white-space: nowrap;
}

.card-chevron {
    color: var(--text3);
    margin-left: 8px;
    transition: transform 0.2s;
    font-size: 0.9rem;
}

.card.expanded .card-chevron { transform: rotate(90deg); }
.card.expanded { border: 1px solid var(--border); }

.card-body {
    display: none;
    padding: 0 14px 14px;
}

.card.expanded .card-body { display: block; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 12px;
    padding: 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s;
    text-decoration: none;
    color: #ffffff;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn:hover { opacity: 0.85; }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }

.btn-primary { background: var(--accent); width: 100%; }
.btn-success { background: var(--accent2); width: 100%; }
.btn-danger { background: var(--danger); }
.btn-surface { background: #48484a; color: #ffffff; }
.btn-back { background: #6E4AC7; color: #ffffff; }
.btn-warning { background: var(--warning); color: #ffffff; }

.btn-sm {
    border-radius: 8px;
    padding: 7px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    width: auto;
}

.btn-row {
    display: flex;
    gap: 10px;
    margin-top: 12px;
}

/* Forms */
.field-group {
    background: var(--surface);
    border-radius: 14px;
    margin-bottom: 16px;
    overflow: hidden;
}

.field-group-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text);
    letter-spacing: 0.8px;
    padding: 16px 14px 8px;
}

.field-row {
    display: flex;
    align-items: center;
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
}

.field-row:last-child { border-bottom: none; }

.field-row label {
    width: 130px;
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.field-row input,
.field-row select,
.field-row textarea {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text);
    font-size: 0.95rem;
    font-family: inherit;
    outline: none;
    padding: 4px 0;
}

.field-row input::placeholder,
.field-row textarea::placeholder { color: var(--text3); }

.field-row select {
    appearance: auto;
    -webkit-appearance: menulist;
}

.field-row select option { background: var(--surface); color: var(--text); }
.field-row textarea { min-height: 60px; resize: vertical; }

/* Status badges */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-pending   { background: rgba(255, 159, 10, 0.15); color: var(--warning); }
.badge-paid      { background: rgba(48, 209, 88, 0.15);  color: var(--accent2); }
.badge-present   { background: rgba(10, 132, 255, 0.15); color: var(--accent); }
.badge-cancelled { background: rgba(255, 69, 58, 0.15);  color: var(--danger); }
.badge-expired   { background: rgba(99, 99, 102, 0.2);   color: var(--text3); }
.badge-complete  { background: rgba(48, 209, 88, 0.15);  color: var(--accent2); }

/* Admin table */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.admin-table th {
    text-align: left;
    padding: 10px 8px;
    color: var(--text2);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border);
}

.admin-table td {
    padding: 10px 8px;
    border-bottom: 1px solid var(--border);
    color: var(--text2);
}

.admin-table tr:last-child td { border-bottom: none; }
.admin-table tr:hover td { color: var(--text); }

/* Stat grid */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 16px;
}

.stat-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 16px;
    text-align: center;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--accent);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

/* Section header */
.section-title {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text3);
    letter-spacing: 0.8px;
    margin: 20px 0 10px;
}

/* Confirmation */
.confirmation-box {
    background: var(--surface);
    border-radius: 14px;
    padding: 24px;
    text-align: center;
    margin: 20px 0;
}

.confirmation-ref {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 2px;
    margin: 16px 0;
}

/* Spinner */
.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin .6s linear infinite;
    display: inline-block;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* Login */
.login-container {
    max-width: 360px;
    margin: 60px auto;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
}

/* ── Date Strip ── */
.date-strip {
    margin-bottom: 16px;
}
.date-strip-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
}
.date-strip-month {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.date-strip-arrow {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 2px 10px;
    border-radius: 8px;
    line-height: 1;
}
.date-strip-arrow:disabled { opacity: 0.25; cursor: not-allowed; }
.date-strip-days {
    display: flex;
    gap: 8px;
}
.date-tile {
    flex: 1;
    height: 60px;
    border-radius: 10px;
    border: 2px solid var(--text);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    gap: 3px;
    transition: background 0.15s, border-color 0.15s;
}
.date-tile-day {
    font-size: 0.6rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text);
    letter-spacing: 0.4px;
}
.date-tile-num {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
}
.date-tile.today { border-color: var(--accent2); }
.date-tile.today .date-tile-day { color: var(--accent2); }
.date-tile.selected { background: var(--accent); border-color: var(--accent); }
.date-tile.selected .date-tile-day,
.date-tile.selected .date-tile-num { color: #ffffff; }

/* ── Sunbed Matrix ── */
.matrix-date-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.matrix-date-bar input[type="date"] {
    flex: 1;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text);
    font-size: 1rem;
    font-family: inherit;
    padding: 10px 12px;
    outline: none;
}

.matrix-legend {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    font-size: 0.75rem;
    color: var(--text2);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    display: inline-block;
    margin-right: 4px;
    vertical-align: middle;
}

.legend-dot.available  { background: var(--accent2); }
.legend-dot.booked     { background: var(--danger); }
.legend-dot.unavailable { background: transparent; border: 2px solid var(--text); opacity: 1; }
.legend-dot.selected   { background: var(--accent); }

.matrix-row-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin: 16px 0 8px;
}

.matrix-row-label span {
    font-size: 0.75rem;
    color: var(--text);
    margin-left: 6px;
    font-weight: 400;
}

.umbrella-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 4px;
}

.umbrella-card {
    background: transparent;
    border: 2px solid var(--text);
    border-radius: 10px;
    padding: 8px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    min-width: 60px;
}

.umbrella-number {
    font-size: 1.5rem;
    color: var(--text);
    font-weight: 700;
}

.umbrella-icon {
    font-size: 1.4rem;
    line-height: 1;
}

.sunbed-slots {
    display: flex;
    gap: 4px;
}

.sunbed-slot {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    font-weight: 700;
    cursor: default;
    transition: transform 0.1s, opacity 0.2s;
    border: 2px solid transparent;
}

.sunbed-slot.available {
    background: rgba(48, 209, 88, 0.2);
    color: var(--accent2);
    cursor: pointer;
    border-color: var(--accent2);
}

.sunbed-slot.available:hover {
    background: rgba(48, 209, 88, 0.35);
    transform: scale(1.1);
}

.sunbed-slot.selected {
    background: rgba(10, 132, 255, 0.25);
    color: var(--accent);
    cursor: pointer;
    border-color: var(--accent);
    transform: scale(1.1);
}

.sunbed-slot.booked {
    background: rgba(255, 69, 58, 0.15);
    color: var(--danger);
    border-color: var(--danger);
}

.sunbed-slot.unavailable {
    background: transparent;
    color: #888888;
    border-color: #888888;
    opacity: 0.7;
}

/* Booking summary bar */
.booking-bar {
    position: sticky;
    bottom: 0;
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.booking-bar-info {
    font-size: 0.85rem;
    color: var(--text2);
}

.booking-bar-info strong {
    color: var(--text);
    font-size: 1rem;
}

/* Order cards */
.order-card {
    background: var(--surface);
    border-radius: 12px;
    padding: 14px;
    margin-bottom: 8px;
    border-left: 3px solid var(--accent);
}

.order-card.food { border-left-color: var(--warning); }
.order-card.drinks { border-left-color: var(--accent2); }

.order-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.order-sunbed {
    font-weight: 700;
    font-size: 1rem;
}

.order-time {
    font-size: 0.75rem;
    color: var(--text3);
}

.order-item-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
}

.order-item-name { color: var(--text2); }
.order-item-qty  { color: var(--text3); font-size: 0.75rem; margin-left: 6px; }

/* Scan result */
.scan-status-box {
    background: var(--surface);
    border-radius: 14px;
    padding: 24px;
    text-align: center;
    margin: 16px 0;
}

.scan-status-label {
    font-size: 0.75rem;
    color: var(--text3);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.scan-sunbed-label {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 2px;
    margin: 8px 0;
}

/* Public booking page */
.public-header {
    text-align: center;
    padding: 24px 16px 16px;
}

.public-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
}

.public-header p {
    color: var(--text2);
    font-size: 0.9rem;
    margin-top: 6px;
}

/* Theme toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text2);
    cursor: pointer;
    user-select: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.theme-toggle input[type="checkbox"] {
    cursor: pointer;
    width: 15px;
    height: 15px;
    accent-color: var(--accent);
}

/* Hamburger — hidden on desktop */
.nav-hamburger { display: none; }
.nav-links { display: none; }

@media (max-width: 768px) {
    #tabs { display: none; }

    #content {
        height: auto;
        padding-bottom: 16px;
    }

    .nav-hamburger {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 4px;
    }

    .nav-hamburger span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 56px;
        right: 0;
        width: max-content;
        min-width: 160px;
        background: var(--surface);
        padding: 0.25rem 0 0.75rem;
        z-index: 1000;
        gap: 0;
        box-shadow: 0 4px 12px rgba(0,0,0,0.5);
        list-style: none;
        border-radius: 0 0 0 10px;
    }

    .nav-links.open { display: flex; }

    .nav-links li { border-top: 1px solid var(--border); }

    .nav-links a {
        display: block;
        padding: 0.75rem 1.75rem;
        font-size: 0.9rem;
        color: var(--text);
        text-decoration: none;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        font-weight: 600;
        white-space: nowrap;
    }

    .nav-links a:hover { color: var(--accent); }

    #app { position: relative; }
}