/**
 * Alumni Book System - Custom Styles
 * Professional Institutional Design
 * Teal/Tosca Green & Gold Color Scheme
 */

:root {
    /* Colors - Professional Institutional Design with Teal/Tosca */
    --primary: #0d7377;           /* Teal/Tosca Green */
    --primary-light: #14919b;     /* Light Teal */
    --primary-dark: #0a5a63;      /* Dark Teal */
    --accent: #d4af37;            /* Warm Gold (accent) */
    --accent-light: #e8c547;      /* Light Gold */
    --accent-dark: #b8941e;       /* Dark Gold */
    --background: #f0fffe;        /* Very Light Teal Background */
    --foreground: #1a3a3a;        /* Dark Teal Text */
    --border-color: #c5e4e3;      /* Light Teal Border */
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    
    /* Typography */
    --font-serif: 'Playfair Display', serif;
    --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

/* ========================================
   Global Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--foreground);
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-serif);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

/* ========================================
   Navigation
   ======================================== */

.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%) !important;
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.15);
}

.navbar-brand {
    font-size: 1.5rem;
    font-family: var(--font-serif);
    letter-spacing: -0.02em;
}

.navbar-brand:hover {
    color: var(--accent) !important;
    transition: color 0.3s ease;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: all 0.3s ease;
    font-weight: 500;
}

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

.dropdown-menu {
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.1);
}

.dropdown-item {
    color: var(--foreground);
    transition: all 0.3s ease;
}

.dropdown-item:hover {
    background-color: var(--accent);
    color: white;
}

/* ========================================
   Cards & Containers
   ======================================== */

.card {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: 0 2px 8px rgba(26, 54, 93, 0.08);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(26, 54, 93, 0.12);
    transform: translateY(-2px);
}

.card-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border-bottom: 2px solid var(--accent);
    font-weight: 600;
}

.card-title {
    color: white;
    font-family: var(--font-serif);
}

/* ========================================
   Buttons
   ======================================== */

.btn {
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all 0.3s ease;
    text-transform: none;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    box-shadow: 0 4px 12px rgba(26, 54, 93, 0.3);
}

.btn-primary:active {
    background-color: var(--primary-dark);
    box-shadow: 0 2px 4px rgba(26, 54, 93, 0.3);
}

.btn-outline-primary {
    color: var(--primary);
    border-color: var(--primary);
}

.btn-outline-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-accent {
    background-color: var(--accent);
    border-color: var(--accent);
    color: var(--primary);
    font-weight: 700;
}

.btn-accent:hover {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
    color: var(--primary);
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

/* ========================================
   Forms
   ======================================== */

.form-control,
.form-select {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 0.2rem rgba(212, 175, 55, 0.25);
    outline: none;
}

.form-label {
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.form-text {
    color: var(--muted-foreground);
    font-size: 0.875rem;
}

/* ========================================
   Alerts & Status
   ======================================== */

.alert {
    border: none;
    border-radius: 0.5rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-left-color: var(--success);
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border-left-color: var(--warning);
}

.alert-danger {
    background-color: #f8d7da;
    color: #721c24;
    border-left-color: var(--danger);
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-left-color: var(--info);
}

.badge {
    padding: 0.5rem 0.75rem;
    border-radius: 0.25rem;
    font-weight: 600;
}

.badge-success {
    background-color: var(--success);
    color: white;
}

.badge-warning {
    background-color: var(--warning);
    color: var(--primary);
}

.badge-danger {
    background-color: var(--danger);
    color: white;
}

.badge-info {
    background-color: var(--info);
    color: white;
}

/* ========================================
   Tables
   ======================================== */

.table {
    border-collapse: collapse;
}

.table thead th {
    background-color: var(--primary);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem;
}

.table tbody tr {
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.3s ease;
}

.table tbody tr:hover {
    background-color: rgba(212, 175, 55, 0.05);
}

.table tbody td {
    padding: 1rem;
    vertical-align: middle;
}

/* ========================================
   Modals
   ======================================== */

.modal-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    border: none;
}

.modal-title {
    font-family: var(--font-serif);
    font-weight: 700;
}

.btn-close {
    filter: brightness(0) invert(1);
}

/* ========================================
   Pagination
   ======================================== */

.pagination .page-link {
    color: var(--primary);
    border-color: var(--border-color);
}

.pagination .page-link:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    color: white;
}

.pagination .page-item.active .page-link {
    background-color: var(--primary);
    border-color: var(--primary);
}

/* ========================================
   Utility Classes
   ======================================== */

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

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

.bg-primary-light {
    background-color: rgba(26, 54, 93, 0.05);
}

.bg-accent-light {
    background-color: rgba(212, 175, 55, 0.1);
}

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

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

/* ========================================
   Animations
   ======================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.slide-in {
    animation: slideIn 0.3s ease-out;
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .navbar-brand {
        font-size: 1.25rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
}

/* ========================================
   Footer
   ======================================== */

footer {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    margin-top: 3rem;
}

footer h5 {
    color: var(--accent);
    font-size: 1.1rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: var(--accent-light);
}

footer .small {
    opacity: 0.9;
}

/* ========================================
   Custom Scrollbar
   ======================================== */

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background);
}

::-webkit-scrollbar-thumb {
    background: var(--primary);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}