/* ==========================================================================
   ZoomFlightz - Global Theme & Design System (style.css)
   Clean, Flexible, and Maintainable Design Tokens
   ========================================================================== */

:root {
    /* 1. Brand & Accent Color System */
    --color-primary: #0284c7;
    --color-primary-hover: #0369a1;
    --color-primary-active: #075985;
    --color-primary-light: #0ea5e9;
    --color-primary-subtle: #f0f9ff;
    --color-primary-subtle-border: #bae6fd;
    --color-primary-rgb: 2, 132, 199;

    --color-accent: #ff6b35;
    --color-accent-hover: #f4511e;
    --color-accent-active: #e64a19;
    --color-accent-subtle: #fff7ed;
    --color-accent-subtle-border: #fed7aa;
    --color-accent-rgb: 255, 107, 53;

    /* 2. Functional & Semantic Status Colors */
    --color-success: #10b981;
    --color-success-hover: #059669;
    --color-success-subtle: #ecfdf5;
    --color-success-border: #a7f3d0;
    --color-success-rgb: 16, 185, 129;

    --color-warning: #f59e0b;
    --color-warning-hover: #d97706;
    --color-warning-subtle: #fffbeb;
    --color-warning-border: #fde68a;

    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-danger-subtle: #fef2f2;
    --color-danger-border: #fecaca;

    --color-info: #0284c7;
    --color-info-subtle: #f0f9ff;

    /* 3. Surface & Canvas Colors */
    --color-bg-body: #f8fafc;
    --color-bg-surface: #ffffff;
    --color-bg-subtle: #f1f5f9;
    --color-bg-dark: #071529;
    --color-bg-dark-surface: #0c213d;
    --color-bg-dark-elevated: #132238;
    --color-bg-dark-border: #1e2f47;

    /* 4. Typography & Text Contrast Hierarchy */
    --color-text-primary: #0f172a;
    --color-text-secondary: #334155;
    --color-text-muted: #64748b;
    --color-text-light: #cbd5e1;
    --color-text-white: #ffffff;

    /* 5. Borders & Dividers */
    --color-border-subtle: #f1f5f9;
    --color-border-default: #e2e8f0;
    --color-border-strong: #cbd5e1;

    /* 6. Spacing & Border Radii */
    --radius-xs: 4px;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-full: 9999px;

    /* 7. Elevation (Shadows) */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);
    --shadow-primary: 0 8px 20px rgba(var(--color-primary-rgb), 0.25);

    /* 8. Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.2s ease;
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* 9. Backwards-Compatibility Aliases */
    --primary-color: var(--color-primary);
    --primary-dark: var(--color-primary-hover);
    --secondary-color: var(--color-primary-light);
    --accent-color: var(--color-accent);
    --success-green: var(--color-success);
    --dark-bg: var(--color-bg-dark);
    --dark-card: var(--color-bg-dark-surface);
    --light-bg: var(--color-bg-body);
    --text-main: var(--color-text-secondary);
    --text-muted: var(--color-text-muted);
    --card-shadow: var(--shadow-sm);
    --hover-shadow: var(--shadow-md);
    --border-radius: var(--radius-md);

    /* 10. Bootstrap 5 Variable Overrides */
    --bs-primary: var(--color-primary);
    --bs-primary-rgb: var(--color-primary-rgb);
    --bs-body-bg: var(--color-bg-body);
    --bs-body-color: var(--color-text-secondary);
    --bs-border-color: var(--color-border-default);
    --bs-link-color: var(--color-primary);
    --bs-link-hover-color: var(--color-primary-hover);
}

/* Base Elements */
body, button, input, select, textarea {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

body {
    background-color: var(--color-bg-body);
    color: var(--color-text-secondary);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow-x: hidden;
}

main {
    flex: 1 0 auto;
}

/* ==========================================================================
   Bootstrap Component Harmonization
   ========================================================================== */

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-white);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active,
.btn-primary.active {
    background-color: var(--color-primary-hover) !important;
    border-color: var(--color-primary-hover) !important;
    color: var(--color-text-white) !important;
    box-shadow: var(--shadow-primary);
}

.btn-outline-primary {
    color: var(--color-primary);
    border-color: var(--color-primary);
    font-weight: 600;
    transition: var(--transition-smooth);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus,
.btn-outline-primary:active {
    background-color: var(--color-primary) !important;
    border-color: var(--color-primary) !important;
    color: var(--color-text-white) !important;
}

.text-primary {
    color: var(--color-primary) !important;
}

.bg-primary {
    background-color: var(--color-primary) !important;
}

.border-primary {
    border-color: var(--color-primary) !important;
}

/* Form Controls Harmonization */
.form-control,
.form-select {
    background-color: var(--color-bg-surface);
    color: var(--color-text-primary);
    border-color: var(--color-border-default);
}

.form-control:focus,
.form-select:focus {
    background-color: var(--color-bg-surface);
    color: var(--color-text-primary);
    border-color: var(--color-primary) !important;
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.15) !important;
    outline: none;
}

/* ==========================================================================
   Icon Utilities
   ========================================================================== */

.icon-sm {
    width: 18px;
    height: 18px;
}

.lucide {
    display: inline-block;
    vertical-align: middle;
    width: 1.2em;
    height: 1.2em;
}

/* ==========================================================================
   Cards & Layout Elements
   ========================================================================== */

.custom-card {
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.custom-card:hover {
    box-shadow: var(--shadow-md);
}

/* Sub-page Header Banner */
.page-header-banner {
    background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-primary-hover) 100%);
    color: var(--color-text-white);
    padding: 3.5rem 0;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    margin-bottom: 2.5rem;
}

/* ==========================================================================
   Universal Price Decimal Superscript Styling
   ========================================================================== */
.offer-grand-price sup,
.flight-price sup,
.sidebar-total-amount sup,
.sidebar-price-breakdown-row sup,
.ticket-total-amount sup,
.deal-price-value sup,
.deal-card-price sup,
.modal-body sup,
#modalBaseFare sup,
#modalTaxFees sup,
#modalGrandTotal sup,
#confirmGrandTotal sup,
#failPrice sup,
#bookingCardPrice sup {
    font-size: 0.6em;
    vertical-align: super;
    font-weight: 700;
    line-height: 1;
    margin-left: 1px;
}