:root {
    --bg-color: #0b132b;
    --card-bg: rgba(28, 37, 65, 0.85);
    --accent-teal: #48cae4;
    --accent-green: #10b981;
    --text-primary: #f8f9fa;
    --text-secondary: #a0aec0;
    --border-color: #3a506b;
    --error-color: #ef4444;
    --gradient: linear-gradient(135deg, #10b981, #0096c7);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(0, 150, 199, 0.1) 0%, transparent 40%);
}

/* Custom Dialog Modal Utility */
.custom-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    z-index: 10000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.custom-dialog-overlay.show {
    opacity: 1;
    pointer-events: auto;
}

.custom-dialog-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 32px;
    width: 100%;
    max-width: 440px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.6);
    transform: scale(0.95);
    transition: transform 0.25s ease;
    text-align: center;
}

.custom-dialog-overlay.show .custom-dialog-card {
    transform: scale(1);
}

.custom-dialog-icon {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    margin: 0 auto 16px auto;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.custom-dialog-icon.info {
    background: rgba(72, 202, 228, 0.15);
    color: var(--accent-teal);
}

.custom-dialog-icon.warning {
    background: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
}

.custom-dialog-icon.danger {
    background: rgba(239, 68, 68, 0.15);
    color: #ef4444;
}

.custom-dialog-icon.success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green);
}

.custom-dialog-title {
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 10px;
}

.custom-dialog-message {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 24px;
    white-space: pre-line;
}

.custom-dialog-actions {
    display: flex;
    gap: 12px;
}

.custom-dialog-btn {
    flex: 1;
    padding: 12px 18px;
    border-radius: 12px;
    font-weight: 700;
    font-size: 14px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.custom-dialog-btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
}

.custom-dialog-btn-cancel {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.custom-dialog-btn-danger {
    background: #ef4444;
    color: #fff;
}

/* ── ADSENSE LOCAL FALLBACK ── */
#adsense-banner-container ins.adsbygoogle:empty {
    display: flex !important;
    align-items: center;
    justify-content: center;
    width: 100%;
    max-width: 728px;
    height: 90px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px dashed var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 13px;
    position: relative;
    margin: 0 auto;
}

#adsense-banner-container ins.adsbygoogle:empty::before {
    content: 'AD';
    position: absolute;
    top: 4px;
    left: 6px;
    font-size: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.5px;
}

#adsense-banner-container ins.adsbygoogle:empty::after {
    content: 'Interactive Google AdSense Banner (728x90) — [Active on Production Live Domain]';
}

/* ── PRINT STYLES (matches Flutter PDF Report) ── */
@media print {
    :root {
        --bg-color: #ffffff;
        --card-bg: #ffffff;
        --text-primary: #000000;
        --text-secondary: #4a5568;
        --border-color: #cbd5e1;
        --accent-teal: #0096c7;
        --accent-green: #2e7d32;
    }

    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt;
    }

    header.app-header,
    .action-bar-row,
    .btn-delete-exp,
    .modal-overlay,
    #btn-close-balances,
    #btn-open-settle-up,
    .balances-sheet-drag {
        display: none !important;
    }

    main.container {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .trip-hero {
        background: #f1f5f9 !important;
        color: #000 !important;
        box-shadow: none !important;
        border: 1px solid #cbd5e1;
        border-radius: 12px;
        padding: 20px !important;
    }

    .trip-hero-info h1 {
        color: #000 !important;
    }

    .total-spent-val {
        color: #000 !important;
    }

    .section-card {
        border: none !important;
        background: #fff !important;
        box-shadow: none !important;
        padding: 0 !important;
        margin-bottom: 24px !important;
    }

    .section-title {
        border-bottom: 2px solid #0096c7;
        padding-bottom: 6px;
        font-size: 14pt;
        color: #000 !important;
    }

    .expense-item {
        background: #fff !important;
        border: none !important;
        border-bottom: 1px solid #cbd5e1 !important;
        border-radius: 0 !important;
        padding: 8px 0 !important;
    }

    .expense-date-box {
        border: 1px solid #cbd5e1;
        border-radius: 4px;
        padding: 4px 6px;
    }

    .expense-date-month,
    .expense-date-day {
        color: #000 !important;
    }

    .expense-date-sep {
        display: none !important;
    }

    .expense-icon {
        display: none !important;
    }

    .expense-title {
        font-size: 11pt;
        color: #000 !important;
    }

    .expense-payer {
        color: #4a5568 !important;
    }

    .split-tag,
    .split-amount {
        color: #000 !important;
    }
}