/* 
    E-Graduate System 2026 Modernization
    Primary Stylesheet 
*/

:root {
    /* RU Brand Colors — extracted from logo asset-11.png */
    --ru-orange:         #E8681A;
    --ru-orange-light:   #F47B20;
    --ru-orange-pale:    rgba(232, 104, 26, 0.12);
    --ru-gray:           #4A4A4A;
    --ru-gray-light:     #6B6B6B;

    /* Gradients */
    --primary-gradient:  linear-gradient(135deg, #c45512 0%, #E8681A 55%, #F47B20 100%);
    --header-gradient:   linear-gradient(160deg, rgba(60,25,5,0.90) 0%, rgba(180,70,10,0.82) 50%, rgba(232,104,26,0.72) 100%);
    --accent-gradient:   linear-gradient(90deg, #c45512 0%, #F47B20 50%, rgba(244,123,32,0.25) 100%);

    /* Aliases for backward compat */
    --ru-blue:           #E8681A;
    --ru-gold:           #c45512;

    /* Shadows */
    --card-shadow:       0 0.125rem 0.5rem rgba(60, 25, 5, 0.10);
    --hover-shadow:      0 0.5rem 1.5rem rgba(60, 25, 5, 0.18);
    --navbar-shadow:     0 2px 12px rgba(60, 25, 5, 0.12);
}

[data-bs-theme="dark"] {
    --ru-orange:         #f08040;
    --ru-orange-light:   #f59050;
    --ru-orange-pale:    rgba(240, 128, 64, 0.12);
    --ru-gray:           #a0a0a0;
    --primary-gradient:  linear-gradient(135deg, #2a1005 0%, #7a3010 60%, #c45512 100%);
    --header-gradient:   linear-gradient(160deg, rgba(20,8,2,0.94) 0%, rgba(80,30,5,0.90) 50%, rgba(180,70,10,0.80) 100%);
    --accent-gradient:   linear-gradient(90deg, #7a3010 0%, #c45512 50%, rgba(196,85,18,0.25) 100%);
    --ru-blue:           #f08040;
    --ru-gold:           #7a3010;
    --card-shadow:       0 0.125rem 0.5rem rgba(0, 0, 0, 0.4);
    --hover-shadow:      0 0.5rem 1.5rem rgba(0, 0, 0, 0.5);
    background-color: #1a0f08 !important;
}

/* Global Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #f8f4f0 !important;
    font-family: 'Sarabun', 'Roboto', sans-serif !important;
    color: #2a1a0f;
    line-height: 1.6;
    transition: background-color 0.3s ease, color 0.3s ease;
}

[data-bs-theme="dark"] body {
    background-color: #1a0f08 !important;
    color: #f0e0d0;
}

/* Navbar Customization */
.navbar {
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
    padding: 0.6rem 0;
    background-color: #ffffff !important;
    box-shadow: var(--navbar-shadow);
    border-bottom: 3px solid var(--ru-orange);
}

[data-bs-theme="dark"] .navbar {
    background-color: #1a0f08 !important;
    border-bottom-color: var(--ru-orange);
}

.navbar-brand h1 {
    font-size: 1.5rem;
    margin-bottom: 0;
    font-weight: 700;
}

.nav-link {
    font-weight: 500;
    color: #3a2010 !important;
    position: relative;
    padding-bottom: 0.3rem !important;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0.5rem;
    right: 0.5rem;
    height: 2px;
    background: var(--ru-orange);
    border-radius: 1px;
    transform: scaleX(0);
    transition: transform 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    transform: scaleX(1);
}

[data-bs-theme="dark"] .nav-link {
    color: #d4a88a !important;
}

.nav-link:hover {
    color: var(--ru-orange) !important;
}

[data-bs-theme="dark"] .nav-link:hover {
    color: var(--ru-orange-light) !important;
}

/* Dashboard & Cards */
.hover-lift {
    transition: transform 0.2s ease, box-shadow 0.2s ease !important;
}

.hover-lift:hover {
    transform: translateY(-5px) !important;
    box-shadow: var(--hover-shadow) !important;
}

.card {
    border-radius: 12px !important;
    border: none !important;
    box-shadow: var(--card-shadow);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-bs-theme="dark"] .card {
    background-color: #1e1e1e !important;
}

[data-bs-theme="dark"] .card-header {
    background-color: #2d2d2d !important;
    border-bottom: 1px solid #333;
}

[data-bs-theme="dark"] .list-group-item {
    background-color: #1e1e1e !important;
    border-color: #333 !important;
    color: #e0e0e0 !important;
}

[data-bs-theme="dark"] .list-group-item:hover {
    background-color: #2d2d2d !important;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
}

[data-bs-theme="dark"] .text-dark {
    color: #ffffff !important;
}

[data-bs-theme="dark"] .text-muted {
    color: #aaaaaa !important;
}

.extra-small { font-size: 0.7rem; }
.italic { font-style: italic; }

/* Form Elements */
.form-control, .form-select {
    border-radius: 8px;
    padding: 0.6rem 1rem;
    border: 1px solid #dee2e6;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

[data-bs-theme="dark"] .form-control, 
[data-bs-theme="dark"] .form-select {
    background-color: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}

.form-control:focus, .form-select:focus {
    border-color: var(--ru-blue);
    box-shadow: 0 0 0 0.25rem rgba(0, 51, 102, 0.1);
}

/* Legacy Support (Preserving some class names but updating styles) */
.load {
    background: rgba(255, 255, 255, 0.9);
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--ru-blue);
}

[data-bs-theme="dark"] .load {
    background: rgba(18, 18, 18, 0.9);
}

table.contentpane {
    width: 100%;
    margin-bottom: 1rem;
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

[data-bs-theme="dark"] table.contentpane {
    background-color: #1e1e1e;
}

table.contentpane th {
    background: #f8f9fa;
    padding: 12px;
    font-weight: 600;
    text-align: left;
    border-bottom: 2px solid #dee2e6;
}

[data-bs-theme="dark"] table.contentpane th {
    background: #2d2d2d;
    border-bottom-color: #444;
    color: #fff;
}

table.contentpane td {
    padding: 12px;
    border-bottom: 1px solid #eee;
}

[data-bs-theme="dark"] table.contentpane td {
    border-bottom-color: #333;
    color: #e0e0e0;
}

/* Utilities */
.transition { transition: all 0.3s ease; }
.letter-spacing-1 { letter-spacing: 1px; }

/* Custom RU Components */
.bg-ru-blue { background-color: var(--ru-blue) !important; }
.text-ru-blue { color: var(--ru-blue) !important; }

/* Footer */
footer {
    background: linear-gradient(180deg, #fdf5ef 0%, #f5e8dc 100%);
    padding: 50px 0;
    margin-top: 50px;
    border-top: 3px solid var(--ru-orange);
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

[data-bs-theme="dark"] footer {
    background: linear-gradient(180deg, #1a0f08 0%, #120a04 100%) !important;
    border-top-color: var(--ru-orange);
}

/* Theme Toggle Button */
.theme-toggle {
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
}

.theme-toggle:hover {
    background-color: rgba(0,0,0,0.05);
}

[data-bs-theme="dark"] .theme-toggle:hover {
    background-color: rgba(255,255,255,0.1);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .masthead .site-heading h2 {
        font-size: 1.75rem;
    }
}