:root {
    --primary: #3E64DE;
    --primary-dark: #2d4db3;
    --secondary: #13567d;
    --accent: #f37632;
    --accent-dark: #d4621f;
    --light-bg: #E7EFFC;
    --light-gray: #f8f9fa;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--light-gray);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

/* Navbar */
.bg-primary-custom {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

/* Navbar logo beyaz */
.navbar-logo {
    filter: brightness(0) invert(1);
}

/* Footer logo beyaz */
.footer-logo {
    filter: brightness(0) invert(1);
}

/* Footer */
.footer-custom {
    background: linear-gradient(135deg, var(--secondary) 0%, #0d3d5a 100%);
    margin-top: auto;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--light-bg) 0%, #d4e2f7 100%);
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.hero-section h1 {
    color: var(--secondary);
    font-weight: 700;
}

.hero-section p {
    color: #555;
    font-size: 1.1rem;
}

/* Cards */
.card-form-select {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
}

.card-form-select:hover {
    transform: translateY(-8px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
}

.card-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 2rem;
}

.card-icon-student {
    background-color: var(--light-bg);
    color: var(--primary);
}

.card-icon-teacher {
    background: #fff3ec;
    color: var(--accent);
}

.btn-primary-custom {
    background-color: var(--primary);
    border-color: var(--primary);
    border-radius: 8px;
    padding: 10px 30px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-primary-custom:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-white-custom {
    background-color: #ffffff;
    border: 2px solid var(--primary);
    color: var(--primary);
    border-radius: 8px;
    padding: 10px 30px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-white-custom:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    transform: translateY(-2px);
}

.btn-accent-custom {
    background-color: var(--accent);
    border-color: var(--accent);
    color: white;
    border-radius: 8px;
    padding: 10px 30px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-accent-custom:hover {
    background-color: var(--accent-dark);
    border-color: var(--accent-dark);
    color: white;
    transform: translateY(-2px);
}

/* Form Sections */
.form-section {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-section-title {
    color: var(--secondary);
    font-weight: 700;
    font-size: 1.1rem;
    border-bottom: 3px solid var(--primary);
    padding-bottom: 0.5rem;
    margin-bottom: 1.25rem;
    display: inline-block;
}

.required-star {
    color: #dc3545;
    font-weight: bold;
}

.optional-badge {
    color: #888;
    font-size: 0.75rem;
    font-weight: 400;
    font-style: italic;
}

/* Success Page */
.success-card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.success-icon {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background-color: #d4edda;
    color: #28a745;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin: 0 auto 1.5rem;
}

/* Admin Panel */
.admin-sidebar {
    background: linear-gradient(180deg, var(--secondary) 0%, #0d3d5a 100%);
    min-height: calc(100vh - 62px);
    padding-top: 1.5rem;
}

.admin-sidebar .nav-link {
    color: rgba(255,255,255,0.7);
    padding: 0.75rem 1.25rem;
    border-radius: 8px;
    margin: 2px 8px;
    transition: all 0.2s;
}

.admin-sidebar .nav-link:hover,
.admin-sidebar .nav-link.active {
    color: white;
    background-color: rgba(255,255,255,0.1);
}

.admin-sidebar .nav-link i {
    width: 24px;
    text-align: center;
}

.stat-card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
    transition: transform 0.2s;
}

.stat-card:hover {
    transform: translateY(-3px);
}

.stat-card .stat-number {
    font-size: 2rem;
    font-weight: 700;
}

.stat-card .stat-label {
    color: #888;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Status Badges */
.badge-beklemede { background-color: #ffc107; color: #000; }
.badge-incelemede { background-color: #17a2b8; color: #fff; }
.badge-onaylandi { background-color: #28a745; color: #fff; }
.badge-gorusme { background-color: #007bff; color: #fff; }
.badge-reddedildi { background-color: #dc3545; color: #fff; }

/* Honeypot */
.hp-field { position: absolute; left: -9999px; top: -9999px; }

/* Loading spinner */
.btn-loading .spinner-border {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

/* Custom file input */
.form-control:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.2rem rgba(62, 100, 222, 0.15);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }

    .hero-section h1 {
        font-size: 1.5rem;
    }

    .card-form-select {
        margin-bottom: 1rem;
    }

    .admin-sidebar {
        min-height: auto;
    }
}

/* Admin table */
.table-admin th {
    background-color: var(--light-bg);
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.table-admin td {
    vertical-align: middle;
}

/* KVKK checkbox area */
.kvkk-section {
    background-color: #fff9f0;
    border: 1px solid #ffe0b2;
    border-radius: 8px;
    padding: 1.25rem;
}

/* Page header */
.page-header {
    background: linear-gradient(135deg, var(--light-bg) 0%, #d4e2f7 100%);
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.page-header h2 {
    color: var(--secondary);
    font-weight: 700;
    margin: 0;
}