/* ═══════════════════════════════════════════════════════════════
   AI BUILDERS LMS — UNIFIED DESIGN SYSTEM (THEME.CSS)
   Inspired by premium academic & technology platforms
   ═══════════════════════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Playfair+Display:ital,wght@0,600;0,700;0,800;1,600&display=swap');

:root {
    /* ── Primary Brand & Palette ── */
    --primary: #0757D5;
    --primary-hover: #0B5ED7;
    --primary-active: #0546B0;
    --primary-light: #DCEAFF;
    --primary-surface: #EFF6FF;

    /* ── Deep Navy & Surfaces ── */
    --navy-900: #11182F;
    --navy-800: #17213F;
    --navy-700: #1E294B;
    --navy-600: #2B3864;
    --navy-light: #F0F4FA;

    /* ── Neutrals & Backgrounds ── */
    --bg-canvas: #F7F8FA;
    --bg-card: #FFFFFF;
    --bg-secondary: #F1F5F9;
    --border-color: #E5E7EB;
    --border-subtle: #F3F4F6;
    --border-focus: #0757D5;

    /* ── Typography Colors ── */
    --text-primary: #111827;
    --text-navy: #17213F;
    --text-secondary: #667085;
    --text-muted: #9CA3AF;
    --text-inverse: #FFFFFF;

    /* ── Status & Accents ── */
    --success: #10B981;
    --success-bg: #ECFDF5;
    --success-text: #065F46;
    --warning: #F59E0B;
    --warning-bg: #FFFBEB;
    --warning-text: #92400E;
    --danger: #EF4444;
    --danger-bg: #FEF2F2;
    --danger-text: #991B1B;
    --info: #0284C7;
    --info-bg: #E0F2FE;

    /* ── Typography Families ── */
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* ── Elevation & Shadows ── */
    --shadow-sm: 0 1px 3px rgba(17, 24, 47, 0.05);
    --shadow-md: 0 4px 12px rgba(17, 24, 47, 0.06), 0 1px 3px rgba(17, 24, 47, 0.04);
    --shadow-lg: 0 10px 28px rgba(17, 24, 47, 0.08), 0 2px 6px rgba(17, 24, 47, 0.04);
    --shadow-xl: 0 20px 40px rgba(17, 24, 47, 0.12);

    /* ── Border Radius ── */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-pill: 9999px;

    /* ── Transitions ── */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Global Resets ── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-canvas);
    color: var(--text-primary);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ── Typography Utilities ── */
h1, h2, h3, .heading-serif {
    font-family: var(--font-heading);
    color: var(--navy-800);
    letter-spacing: -0.015em;
    font-weight: 700;
}

h4, h5, h6 {
    font-family: var(--font-sans);
    color: var(--navy-800);
    font-weight: 600;
}

/* ── Brand Logo Component ── */
.ai-brand-badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.ai-brand-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #FFFFFF;
    font-size: 18px;
    box-shadow: 0 2px 8px rgba(7, 87, 213, 0.3);
}

.ai-brand-name {
    font-family: var(--font-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--navy-800);
    letter-spacing: -0.3px;
}

/* ── Button System ── */
.btn-primary, .btn-main {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: var(--primary);
    color: #FFFFFF !important;
    border: 1px solid var(--primary);
    padding: 10px 22px;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 0 2px 6px rgba(7, 87, 213, 0.25);
}

.btn-primary:hover, .btn-main:hover {
    background: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(7, 87, 213, 0.35);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: #FFFFFF;
    color: var(--primary) !important;
    border: 1.5px solid var(--primary);
    padding: 9px 20px;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-secondary:hover {
    background: var(--primary-surface);
    transform: translateY(-1px);
}

.btn-danger-outline {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: transparent;
    color: var(--danger) !important;
    border: 1.5px solid var(--danger);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-fast);
}

.btn-danger-outline:hover {
    background: var(--danger);
    color: #FFFFFF !important;
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ── Card System ── */
.theme-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
    overflow: hidden;
}

.theme-card:hover {
    box-shadow: var(--shadow-md);
    border-color: #D1D5DB;
}

.theme-card-dark {
    background: var(--navy-800);
    border: 1px solid var(--navy-700);
    border-radius: var(--radius-lg);
    color: #FFFFFF;
    box-shadow: var(--shadow-md);
}

/* ── Form Controls ── */
.form-input, .form-control, select, input[type="text"], input[type="password"], input[type="email"], input[type="number"], input[type="date"], input[type="time"], textarea {
    width: 100%;
    padding: 10px 14px;
    font-family: var(--font-sans);
    font-size: 14px;
    color: var(--text-primary);
    background: #FFFFFF;
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus, .form-control:focus, select:focus, input:focus, textarea:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3.5px rgba(7, 87, 213, 0.15);
}

/* ── Table System ── */
.theme-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    background: #FFFFFF;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-size: 13.5px;
}

.theme-table th {
    background: var(--bg-secondary);
    color: var(--navy-800);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
    padding: 12px 16px;
    border-bottom: 1.5px solid var(--border-color);
    text-align: left;
}

.theme-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.theme-table tr:last-child td {
    border-bottom: none;
}

.theme-table tr:hover td {
    background: var(--primary-surface);
}

/* ── Status Badges ── */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2px;
}

.status-pill.success {
    background: var(--success-bg);
    color: var(--success-text);
}

.status-pill.warning {
    background: var(--warning-bg);
    color: var(--warning-text);
}

.status-pill.danger {
    background: var(--danger-bg);
    color: var(--danger-text);
}

.status-pill.primary {
    background: var(--primary-light);
    color: var(--primary);
}