/* 
 * Certificate Portal - Custom Styles
 * Professional, Clean, Mobile-First Design
 */

:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --light-bg: #f8fafc;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
}

* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background-color: var(--light-bg);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar Styles */
.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: 0.375rem;
    transition: all 0.2s;
}

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

.nav-link.active {
    background-color: rgba(255, 255, 255, 0.15);
}

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
}

.login-card {
    background: white;
    border-radius: 1rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    margin: 1rem;
}

.login-logo {
    width: 80px;
    height: 80px;
    background: var(--primary-color);
    border-radius: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2.5rem;
}

.login-title {
    text-align: center;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.login-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Cards */
.card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.2s;
}

.card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: white;
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.25rem;
    font-weight: 600;
}

/* Stats Cards */
.stat-card {
    border: none;
    border-radius: 0.75rem;
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Tables */
.table {
    margin-bottom: 0;
}

.table th {
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    border-bottom-width: 1px;
    padding: 1rem;
}

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

.table-hover tbody tr:hover {
    background-color: var(--light-bg);
}

/* Status Badges */
.badge {
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    border-radius: 9999px;
}

.badge-status-valid {
    background-color: #dcfce7;
    color: #166534;
}

.badge-status-expiring {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-status-expired {
    background-color: #fee2e2;
    color: #991b1b;
}

/* Buttons */
.btn {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: all 0.2s;
    min-height: 44px; /* iOS minimum touch target */
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

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

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

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

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

/* Form Controls */
.form-control, .form-select {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    min-height: 44px; /* Better mobile touch target */
    font-size: 16px; /* Prevent iOS zoom on focus */
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-label {
    font-weight: 500;
    margin-bottom: 0.375rem;
    color: var(--text-primary);
}

.input-group-text {
    background-color: var(--light-bg);
    border: 1px solid var(--border-color);
}

/* Search & Filter Bar */
.filter-bar {
    background: white;
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
}

/* Certificate Card (Mobile) */
.certificate-card {
    background: white;
    border-radius: 0.75rem;
    padding: 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.2s;
}

.certificate-card:hover {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

.certificate-card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.75rem;
}

.certificate-number {
    font-weight: 600;
    color: var(--primary-color);
}

.certificate-meta {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.certificate-meta-item {
    font-size: 0.875rem;
}

.certificate-meta-label {
    color: var(--text-secondary);
    display: block;
}

.certificate-meta-value {
    font-weight: 500;
}

/* Notifications */
.notification-item {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    transition: background-color 0.2s;
}

.notification-item:hover {
    background-color: var(--light-bg);
}

.notification-item.unread {
    background-color: #eff6ff;
}

.notification-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
    min-width: 0;
}

.notification-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.notification-message {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
}

.notification-time {
    color: var(--text-secondary);
    font-size: 0.75rem;
}

/* Page Header */
.page-header {
    margin-bottom: 1.5rem;
}

.page-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.page-subtitle {
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
}

.empty-state-icon {
    width: 80px;
    height: 80px;
    background-color: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    color: var(--text-secondary);
}

.empty-state-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state-text {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* File Upload */
.file-upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem 1.5rem;
    text-align: center;
    transition: all 0.2s;
    cursor: pointer;
}

.file-upload-zone:hover,
.file-upload-zone.dragover {
    border-color: var(--primary-color);
    background-color: #eff6ff;
}

.file-upload-icon {
    font-size: 3rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

/* Pagination */
.pagination {
    margin-bottom: 0;
}

.page-link {
    color: var(--text-primary);
    border-color: var(--border-color);
    padding: 0.5rem 0.875rem;
}

.page-link:hover {
    background-color: var(--light-bg);
    border-color: var(--border-color);
    color: var(--primary-color);
}

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

/* Footer */
.footer {
    margin-top: auto;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .stat-card {
        padding: 1rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .page-title {
        font-size: 1.5rem;
    }
    
    .table-responsive {
        border-radius: 0.75rem;
        border: 1px solid var(--border-color);
    }
    
    /* Hide table on mobile, show cards */
    .table-desktop {
        display: none;
    }
    
    .cards-mobile {
        display: block;
    }
    
    .filter-bar {
        padding: 1rem;
    }

    /* Navbar mobile improvements */
    .navbar {
        padding: 0.5rem 1rem;
    }
    .navbar-brand {
        font-size: 1.1rem;
    }
    .navbar-toggler {
        padding: 0.25rem 0.75rem;
        font-size: 1.25rem;
    }
    .navbar-nav {
        gap: 0.25rem;
    }
    .nav-link {
        padding: 0.75rem 1rem !important;
        font-size: 1rem;
    }
    .dropdown-menu {
        font-size: 1rem;
        min-width: 160px;
    }

    /* Mobile dropdown menu display */
    .navbar-collapse .dropdown-menu {
        position: static !important;
        transform: none !important;
        border: none;
        box-shadow: none;
        background-color: rgba(255, 255, 255, 0.1);
        margin-left: 1rem;
        border-radius: 0.25rem;
    }

    .navbar-collapse .dropdown-menu.show {
        display: block !important;
    }

    .navbar-collapse .dropdown-item {
        color: rgba(255, 255, 255, 0.85);
        padding: 0.5rem 1rem;
    }

    .navbar-collapse .dropdown-item:hover,
    .navbar-collapse .dropdown-item:focus {
        background-color: rgba(255, 255, 255, 0.15);
        color: white;
    }

    /* Card and container spacing */
    .card, .certificate-card, .filter-bar {
        margin-left: 0.25rem;
        margin-right: 0.25rem;
    }

    /* Reduce padding for main content */
    .container, .container-fluid, .content {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }

    /* Table cell font size */
    .table th, .table td {
        font-size: 0.95rem;
        padding: 0.5rem;
    }

    /* Footer spacing */
    .footer {
        font-size: 0.95rem;
        padding: 0.75rem 0.5rem;
    }

    /* Login card adjustments */
    .login-card {
        padding: 1.25rem;
        max-width: 98vw;
    }

    /* Notification item spacing */
    .notification-item {
        padding: 0.75rem 0.5rem;
        font-size: 0.95rem;
    }

    /* File upload zone */
    .file-upload-zone {
        padding: 2rem 0.5rem;
    }

    /* Hide some desktop-only quick actions */
    .quick-action {
        padding: 1rem;
        font-size: 0.95rem;
    }

    /* Optimize buttons for mobile */
    .btn:not(.btn-sm):not(.btn-icon) {
        padding: 0.75rem 1.25rem;
        font-size: 1rem;
        min-height: 48px;
    }

    .btn-group .btn {
        width: auto;
    }

    /* Make sure modals fit screen */
    .modal-dialog {
        margin: 0.5rem;
        max-width: 98vw;
    }

    .modal-body {
        padding: 1rem 0.75rem;
    }

    /* Improve badge visibility */
    .badge {
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
    }

    /* Better form spacing */
    .mb-3 {
        margin-bottom: 1.25rem !important;
    }

    /* Improve action buttons */
    .btn-group-sm .btn, .btn-sm {
        min-height: 40px;
        padding: 0.5rem 0.75rem;
    }

    /* Certificate meta grid for mobile */
    .certificate-meta {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    /* Page header improvements */
    .page-header {
        margin-bottom: 1rem;
    }

    .page-header .btn {
        width: 100%;
        margin-top: 0.5rem;
    }

    /* Improve empty state on mobile */
    .empty-state {
        padding: 2rem 1rem;
    }

    .empty-state-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }

    /* Optimize profile avatar */
    .profile-avatar {
        width: 80px;
        height: 80px;
        font-size: 2rem;
    }

    /* Quick actions grid */
    .quick-actions {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    /* Improve pagination for mobile */
    .pagination {
        font-size: 0.875rem;
    }

    .page-link {
        padding: 0.375rem 0.625rem;
    }

    /* Better chart container */
    .chart-container {
        height: 250px;
    }

    /* Improve search/filter bar */
    .filter-bar .row > div {
        margin-bottom: 0.75rem;
    }

    /* Make input groups stack on mobile */
    .input-group {
        flex-wrap: wrap;
    }

    .input-group > .form-control,
    .input-group > .form-select {
        min-width: 100%;
    }

    /* Optimize dropdown items */
    .dropdown-item {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }

    /* Better table overflow handling */
    .table-responsive {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

/* Extra small devices (phones under 576px) */
@media (max-width: 575.98px) {
    body {
        font-size: 0.95rem;
    }

    .container {
        padding-left: 0.5rem;
        padding-right: 0.5rem;
    }

    .card {
        border-radius: 0.5rem;
    }

    .card-body {
        padding: 0.75rem;
    }

    .stat-card {
        padding: 0.75rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .stat-icon {
        width: 40px;
        height: 40px;
        font-size: 1.25rem;
    }

    .page-title {
        font-size: 1.25rem;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    h4 { font-size: 1.1rem; }
    h5 { font-size: 1rem; }

    .navbar-brand {
        font-size: 1rem;
    }

    .notification-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .login-card {
        padding: 1rem;
        margin: 0.5rem;
    }

    .login-logo {
        width: 60px;
        height: 60px;
        font-size: 2rem;
    }
}

@media (min-width: 769px) {
    .cards-mobile {
        display: none;
    }
    
    .table-desktop {
        display: block;
    }
}

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

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

/* Loading Spinner */
.spinner-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

/* Charts Container */
.chart-container {
    position: relative;
    height: 300px;
}

/* Profile Avatar */
.profile-avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2.5rem;
    font-weight: 600;
}

/* Quick Actions */
.quick-action {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.5rem;
    border-radius: 0.75rem;
    background: white;
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s;
}

.quick-action:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    color: var(--primary-color);
}

.quick-action-icon {
    width: 48px;
    height: 48px;
    border-radius: 0.5rem;
    background: var(--light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--primary-color);
}

.quick-action-label {
    font-weight: 500;
    font-size: 0.875rem;
}