/* =============================================
   Premium Medical Reference - Admin Panel CSS
   Dark premium design with glassmorphism
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
    --bg-primary: #121212;
    --bg-secondary: #1a1a1a;
    --bg-card: rgba(30, 30, 30, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-input: rgba(255, 255, 255, 0.1);
    --border: rgba(255, 255, 255, 0.15);
    --border-hover: rgba(255, 255, 255, 0.3);
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #666666;
    --accent: #ffffff;
    --accent-hover: #e0e0e0;
    --accent-glow: rgba(255, 255, 255, 0.2);
    --success: #4caf50;
    --success-bg: rgba(76, 175, 80, 0.1);
    --warning: #ffb300;
    --warning-bg: rgba(255, 179, 0, 0.1);
    --danger: #f44336;
    --danger-bg: rgba(244, 67, 54, 0.1);
    --info: #bdbdbd;
    --info-bg: rgba(189, 189, 189, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}

/* ===== LAYOUT ===== */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    padding: 24px 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 0 24px 24px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 16px;
}

.sidebar-brand h2 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.sidebar-brand small {
    font-size: 11px;
    color: var(--text-secondary);
    font-weight: 400;
}

.sidebar-nav {
    list-style: none;
    padding: 0 12px;
}

.sidebar-nav li {
    margin-bottom: 2px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.sidebar-nav a:hover {
    background: var(--bg-glass);
    color: var(--text-primary);
}

.sidebar-nav a.active {
    background: var(--accent-glow);
    color: var(--accent);
}

.sidebar-nav .nav-icon {
    font-size: 18px;
    width: 24px;
    text-align: center;
}

.main-content {
    margin-left: 260px;
    flex: 1;
    padding: 32px;
    min-height: 100vh;
}

/* ===== HEADER ===== */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.page-header .subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ===== CARDS ===== */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    border-color: var(--border-hover);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    backdrop-filter: blur(20px);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent);
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover::before {
    opacity: 1;
}

.stat-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-hover);
}

.stat-card .stat-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-card.accent { --card-color: var(--accent); }
.stat-card.success { --card-color: var(--success); }
.stat-card.warning { --card-color: var(--warning); }
.stat-card.danger { --card-color: var(--danger); }
.stat-card.info { --card-color: var(--info); }

.stat-card.accent .stat-value { color: var(--accent); }
.stat-card.success .stat-value { color: var(--success); }
.stat-card.warning .stat-value { color: var(--warning); }
.stat-card.danger .stat-value { color: var(--danger); }
.stat-card.info .stat-value { color: var(--info); }

/* ===== TABLE ===== */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead th {
    background: var(--bg-secondary);
    padding: 14px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

tbody td {
    padding: 12px 16px;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

tbody tr {
    transition: var(--transition);
}

tbody tr:hover {
    background: var(--bg-glass);
}

tbody tr:last-child td {
    border-bottom: none;
}

/* ===== BADGES ===== */
.badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-available { background: var(--success-bg); color: var(--success); }
.badge-active { background: var(--info-bg); color: var(--info); }
.badge-reserved { background: var(--warning-bg); color: var(--warning); }
.badge-expired { background: var(--danger-bg); color: var(--danger); }
.badge-pending { background: var(--warning-bg); color: var(--warning); }
.badge-approved { background: var(--success-bg); color: var(--success); }
.badge-rejected { background: var(--danger-bg); color: var(--danger); }

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--accent);
    color: #121212;
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-success {
    background: var(--success);
    color: #0f0f23;
}

.btn-success:hover {
    filter: brightness(1.1);
}

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

.btn-danger:hover {
    filter: brightness(1.1);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-primary);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 12px;
}

.btn-group {
    display: flex;
    gap: 8px;
}

/* ===== FORMS ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%238888aa'%3e%3cpath d='M7 10l5 5 5-5z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
}

/* ===== SEARCH ===== */
.search-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.search-bar input {
    flex: 1;
    padding: 10px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
}

.search-bar input:focus {
    outline: none;
    border-color: var(--accent);
}

/* ===== PAGINATION ===== */
.pagination {
    display: flex;
    gap: 8px;
    margin-top: 20px;
    justify-content: center;
}

.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    text-decoration: none;
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.pagination a:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.pagination .active {
    background: var(--accent);
    color: white;
    border-color: var(--accent);
}

/* ===== ALERTS ===== */
.alert {
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideDown 0.3s ease;
}

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

.alert-success {
    background: var(--success-bg);
    border: 1px solid rgba(0, 214, 143, 0.2);
    color: var(--success);
}

.alert-error {
    background: var(--danger-bg);
    border: 1px solid rgba(255, 61, 113, 0.2);
    color: var(--danger);
}

/* ===== DETAIL PAGE ===== */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border);
}

.detail-item .label {
    color: var(--text-secondary);
    font-size: 13px;
}

.detail-item .value {
    font-weight: 500;
    font-size: 14px;
}

/* ===== FILE UPLOAD ===== */
.file-upload {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload:hover {
    border-color: var(--accent);
    background: var(--bg-glass);
}

.file-upload input[type="file"] {
    display: none;
}

.file-upload .upload-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.file-upload .upload-text {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== FILTER TABS ===== */
.filter-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-tab {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.filter-tab:hover,
.filter-tab.active {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== LOGIN PAGE ===== */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: var(--bg-primary);
}

.login-box {
    width: 420px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
}

.login-box h1 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.login-box .subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 32px;
}

.login-box .btn {
    width: 100%;
    justify-content: center;
    padding: 12px;
}

/* ===== RECEIPT IMAGE ===== */
.receipt-thumb {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-sm);
    object-fit: cover;
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.receipt-thumb:hover {
    transform: scale(1.05);
    border-color: var(--accent);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .main-content {
        margin-left: 0;
        padding: 16px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .page-header {
        flex-direction: column;
        gap: 12px;
    }

    .search-bar {
        flex-direction: column;
    }

    .btn-group {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== MOBILE TOGGLE ===== */
.mobile-toggle {
    display: none;
    position: fixed;
    top: 16px;
    left: 16px;
    z-index: 200;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 20px;
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }
}

/* ===== MODAL ===== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    max-width: 500px;
    width: 90%;
    backdrop-filter: blur(20px);
}

.modal h3 {
    margin-bottom: 16px;
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state .empty-icon {
    font-size: 64px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state p {
    font-size: 16px;
    margin-bottom: 20px;
}