/* Certificate Management System - Custom Styles */

:root {
    --primary-color: #0d6efd;
    --sidebar-bg: #212529;
    --sidebar-width: 250px;
}

/* General */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-card {
    width: 100%;
    max-width: 400px;
    padding: 2rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.login-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.login-card .logo {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-card .logo i {
    font-size: 4rem;
    color: var(--primary-color);
}

/* Admin Layout */
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--sidebar-bg);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    transition: all 0.3s;
}

.sidebar .brand {
    padding: 1rem;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar .brand h4 {
    color: white;
    margin: 0;
}

.sidebar .nav-menu {
    padding: 1rem 0;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.7);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    transition: all 0.3s;
}

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

.sidebar .nav-link i {
    width: 25px;
    margin-right: 10px;
}

/* Main Content */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
}

.top-navbar {
    background: white;
    padding: 1rem 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.content-wrapper {
    padding: 1.5rem;
}

/* Dashboard Cards */
.stat-card {
    background: white;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-left: 4px solid var(--primary-color);
}

.stat-card.success {
    border-left-color: #198754;
}

.stat-card.warning {
    border-left-color: #ffc107;
}

.stat-card.info {
    border-left-color: #0dcaf0;
}

.stat-card h3 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
}

.stat-card p {
    color: #6c757d;
    margin: 0;
    font-size: 0.9rem;
}

/* Tables */
.table-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.table-card .card-header {
    background: white;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

.table-card .card-body {
    padding: 1.5rem;
}

/* Status Badges */
.badge-paid {
    background-color: #198754;
}

.badge-pending {
    background-color: #ffc107;
    color: #212529;
}

/* Student Portal */
.student-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 2rem;
}

.profile-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.profile-card .card-header {
    background: var(--primary-color);
    color: white;
    padding: 1rem 1.5rem;
}

.qr-code-container {
    text-align: center;
    padding: 2rem;
    background: #f8f9fa;
    border-radius: 10px;
}

.qr-code-container img {
    max-width: 250px;
    border: 5px solid white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Buttons */
.btn-download {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    .sidebar.show {
        margin-left: 0;
    }

    .main-content {
        margin-left: 0;
    }
}

/* Form styling */
.form-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.form-card .card-header {
    background: white;
    border-bottom: 1px solid #dee2e6;
    padding: 1rem 1.5rem;
}

.form-card .card-body {
    padding: 1.5rem;
}

/* Action buttons */
.action-buttons .btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

/* File upload styling */
.custom-file-upload {
    border: 2px dashed #dee2e6;
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.custom-file-upload:hover {
    border-color: var(--primary-color);
    background: #f8f9fa;
}

.custom-file-upload i {
    font-size: 3rem;
    color: #6c757d;
}