@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    --bg-base: #0b0f19;
    --bg-surface: #131b2e;
    --bg-card: #182238;
    --bg-card-hover: #1e2b47;
    --bg-input: #0e1626;
    --border-subtle: #24324f;
    --border-hover: #3b5078;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --accent-blue: #38bdf8;
    --accent-green: #34d399;
    --accent-amber: #fbbf24;
    --accent-cyan: #22d3ee;
    --accent-red: #f87171;
}

*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
    margin: 0;
    padding: 0;
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* ==========================================================
   NAVIGATION BAR
   ========================================================== */
.admin-navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.85rem 2rem;
    background: rgba(19, 27, 46, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: opacity 0.2s ease;
}

.navbar-brand i {
    color: var(--accent-blue);
    font-size: 1.35rem;
}

.navbar-brand:hover {
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    background: transparent;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav-link-btn:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.06);
}

.nav-link-btn.active {
    color: var(--accent-blue);
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.25);
    font-weight: 600;
}

.btn-danger-outline {
    color: var(--accent-red) !important;
    border: 1px solid rgba(248, 113, 113, 0.3) !important;
    background: rgba(248, 113, 113, 0.05) !important;
}

.btn-danger-outline:hover {
    background: #ef4444 !important;
    color: #ffffff !important;
    border-color: #ef4444 !important;
}

/* ==========================================================
   MAIN CONTAINER & PAGE HEADERS
   ========================================================== */
.admin-container {
    max-width: 1200px;
    margin: 2.5rem auto;
    padding: 0 1.5rem;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 2.25rem;
}

.page-title {
    font-size: 1.85rem;
    font-weight: 800;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0 0 0.4rem 0;
    letter-spacing: -0.025em;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-subtle);
    transition: all 0.2s ease;
}

.back-btn:hover {
    color: var(--accent-blue);
    border-color: var(--border-hover);
    background: rgba(56, 189, 248, 0.08);
}

/* ==========================================================
   DASHBOARD GRID & CARDS
   ========================================================== */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.admin-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    transition: transform 0.2s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s, border-color 0.2s;
    display: flex;
    flex-direction: column;
}

.admin-card:hover {
    transform: translateY(-3px);
    border-color: var(--border-hover);
    box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4);
}

.card-icon {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
}

.icon-green {
    background: rgba(52, 211, 153, 0.12);
    color: var(--accent-green);
    border: 1px solid rgba(52, 211, 153, 0.25);
}

.icon-amber {
    background: rgba(251, 191, 36, 0.12);
    color: var(--accent-amber);
    border: 1px solid rgba(251, 191, 36, 0.25);
}

.icon-cyan {
    background: rgba(34, 211, 238, 0.12);
    color: var(--accent-cyan);
    border: 1px solid rgba(34, 211, 238, 0.25);
}

.icon-blue {
    background: rgba(56, 189, 248, 0.12);
    color: var(--accent-blue);
    border: 1px solid rgba(56, 189, 248, 0.25);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.6rem;
    letter-spacing: -0.015em;
}

.card-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.admin-card .btn {
    margin-top: auto;
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
}

/* ==========================================================
   BUTTONS OVERRIDES
   ========================================================== */
.btn-primary {
    background-color: #0284c7;
    border-color: #0284c7;
    color: #ffffff;
}
.btn-primary:hover, .btn-primary:focus {
    background-color: #0369a1;
    border-color: #0369a1;
}

.btn-success {
    background-color: #059669;
    border-color: #059669;
    color: #ffffff;
}
.btn-success:hover, .btn-success:focus {
    background-color: #047857;
    border-color: #047857;
}

.btn-warning {
    background-color: #d97706;
    border-color: #d97706;
    color: #ffffff;
}
.btn-warning:hover, .btn-warning:focus {
    background-color: #b45309;
    border-color: #b45309;
    color: #ffffff;
}

.btn-secondary {
    background-color: #334155;
    border-color: #334155;
    color: #f1f5f9;
}
.btn-secondary:hover, .btn-secondary:focus {
    background-color: #475569;
    border-color: #475569;
}

/* ==========================================================
   BADGES & ALERTS
   ========================================================== */
.badge-info {
    background: rgba(56, 189, 248, 0.12);
    color: var(--accent-blue);
    border: 1px solid rgba(56, 189, 248, 0.25);
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.85rem;
}

.alert {
    border-radius: var(--radius-md);
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    border: 1px solid transparent;
}

.alert-success {
    background: rgba(52, 211, 153, 0.1);
    color: var(--accent-green);
    border-color: rgba(52, 211, 153, 0.25);
}

.alert-danger {
    background: rgba(248, 113, 113, 0.1);
    color: var(--accent-red);
    border-color: rgba(248, 113, 113, 0.25);
}

/* ==========================================================
   FORM CONTROLS & INPUTS
   ========================================================== */
.form-label {
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    background-color: var(--bg-input);
    border: 1px solid var(--border-subtle);
    color: var(--text-main);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.95rem;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus, .form-select:focus {
    background-color: var(--bg-input);
    border-color: var(--accent-blue);
    color: #ffffff;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
    outline: none;
}

.form-control::placeholder {
    color: var(--text-dim);
}

/* ==========================================================
   FILE DROPZONE
   ========================================================== */
.file-dropzone {
    position: relative;
    border: 2px dashed var(--border-hover);
    border-radius: var(--radius-md);
    padding: 2.25rem 1.5rem;
    text-align: center;
    background: rgba(14, 22, 38, 0.6);
    cursor: pointer;
    transition: all 0.2s ease;
}

.file-dropzone:hover, .file-dropzone.dragover {
    border-color: var(--accent-blue);
    background: rgba(56, 189, 248, 0.05);
}

.file-dropzone input[type="file"] {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
    z-index: 5;
}

.dropzone-content i {
    font-size: 2.75rem;
    color: var(--accent-red);
    margin-bottom: 0.75rem;
}

/* ==========================================================
   MODALS
   ========================================================== */
.modal-backdrop {
    background-color: rgba(11, 15, 25, 0.8) !important;
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--bg-card) !important;
    color: var(--text-main) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-lg) !important;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6) !important;
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid var(--border-subtle);
    padding: 1.25rem 1.75rem;
    background: rgba(0, 0, 0, 0.15);
}

.modal-body {
    padding: 1.75rem;
}

.modal-footer {
    border-top: 1px solid var(--border-subtle);
    padding: 1rem 1.75rem;
    background: rgba(0, 0, 0, 0.15);
}

/* ==========================================================
   ADMIN DATA TABLE
   ========================================================== */
.table-responsive {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin: 0;
    color: var(--text-main);
}

.admin-table th {
    background: rgba(14, 22, 38, 0.95);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
    white-space: nowrap;
}

.admin-table td {
    padding: 1.15rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    vertical-align: middle;
    font-size: 0.9rem;
}

.admin-table tbody tr {
    transition: background-color 0.15s ease;
}

.admin-table tbody tr:hover {
    background-color: rgba(255, 255, 255, 0.03);
}

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

/* ==========================================================
   TIMETABLES CODE EDITOR
   ========================================================== */
.editor-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.code-editor {
    font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    background-color: var(--bg-input);
    color: #7dd3fc;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    min-height: 440px;
    width: 100%;
    tab-size: 2;
    resize: vertical;
    outline: none;
}

.code-editor:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.preview-box {
    background-color: #ffffff;
    color: #0f172a;
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    min-height: 440px;
    border: 1px solid var(--border-subtle);
    overflow: auto;
}

.tab-btn-group {
    display: flex;
    gap: 8px;
    margin-bottom: 0.75rem;
}

/* ==========================================================
   TRIX RICH TEXT EDITOR (DARK THEME)
   ========================================================== */
trix-toolbar {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-subtle) !important;
    border-radius: var(--radius-sm) var(--radius-sm) 0 0 !important;
    padding: 0.6rem !important;
}

trix-toolbar .trix-button {
    background: rgba(255, 255, 255, 0.05) !important;
    border: 1px solid var(--border-subtle) !important;
    color: var(--text-main) !important;
    border-radius: 4px !important;
}

trix-toolbar .trix-button:hover {
    background: rgba(255, 255, 255, 0.12) !important;
}

trix-toolbar .trix-button.trix-active {
    background: #0284c7 !important;
    color: #ffffff !important;
}

trix-editor {
    background: var(--bg-input) !important;
    border: 1px solid var(--border-subtle) !important;
    border-top: none !important;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm) !important;
    min-height: 220px !important;
    color: var(--text-main) !important;
    padding: 1rem !important;
    font-size: 0.95rem !important;
    line-height: 1.6 !important;
}

trix-editor:focus {
    border-color: var(--accent-blue) !important;
    outline: none !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .admin-navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }
    .page-header {
        flex-direction: column;
    }
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}