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

:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(255,255,255,0.04);
    --bg-card-hover: rgba(255,255,255,0.07);
    --bg-sidebar: #0d1321;
    --border: rgba(255,255,255,0.08);
    --border-active: rgba(20,184,166,0.4);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #14b8a6;
    --accent-glow: rgba(20,184,166,0.15);
    --gold: #d4a843;
    --gold-glow: rgba(212,168,67,0.15);
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
    --info: #3b82f6;
    --sidebar-w: 260px;
    --header-h: 64px;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px 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: 'Poppins', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--gold); }

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

.sidebar {
    width: var(--sidebar-w);
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
}

.sidebar-brand {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    text-align: center;
}

.sidebar-brand h1 {
    font-size: 1.4rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gold), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 1px;
}

.sidebar-brand p {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: 4px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section {
    margin-bottom: 20px;
}

.nav-section-title {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 2px;
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 400;
    transition: var(--transition);
    margin-bottom: 2px;
}

.nav-link:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.nav-link.active {
    background: var(--accent-glow);
    color: var(--accent);
    font-weight: 500;
    border-left: 3px solid var(--accent);
}

.nav-link i { width: 20px; text-align: center; font-size: 1rem; }

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: var(--radius-sm);
}

.user-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--gold));
    display: flex; align-items: center; justify-content: center;
    font-weight: 700; font-size: 0.85rem; color: #fff;
}

.user-name { font-size: 0.8rem; font-weight: 500; }
.user-role { font-size: 0.65rem; color: var(--text-muted); text-transform: capitalize; }

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

.top-bar {
    height: var(--header-h);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}

.top-bar h2 { font-size: 1.1rem; font-weight: 600; }

.content-area { padding: 24px; }

/* ========== CARDS ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

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

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--gold));
    opacity: 0;
    transition: var(--transition);
}

.stat-card:hover { border-color: var(--border-active); transform: translateY(-2px); }
.stat-card:hover::before { opacity: 1; }

.stat-card .stat-icon {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.stat-card .stat-icon.teal { background: var(--accent-glow); color: var(--accent); }
.stat-card .stat-icon.gold { background: var(--gold-glow); color: var(--gold); }
.stat-card .stat-icon.blue { background: rgba(59,130,246,0.15); color: var(--info); }
.stat-card .stat-icon.green { background: rgba(34,197,94,0.15); color: var(--success); }

.stat-card .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* ========== PANEL / TABLE ========== */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 24px;
    overflow: hidden;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.panel-header h3 { font-size: 1rem; font-weight: 600; }
.panel-body { padding: 20px; }

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

.data-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    border-bottom: 1px solid var(--border);
    background: rgba(0,0,0,0.15);
}

.data-table td {
    padding: 12px 16px;
    font-size: 0.85rem;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
}

.data-table tr:hover td { background: var(--bg-card-hover); color: var(--text-primary); }

/* ========== BUTTONS ========== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: 'Poppins', sans-serif;
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #0d9488);
    color: #fff;
    box-shadow: 0 2px 12px rgba(20,184,166,0.3);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 20px rgba(20,184,166,0.4); color:#fff; }

.btn-gold {
    background: linear-gradient(135deg, var(--gold), #b8922f);
    color: #fff;
}
.btn-gold:hover { transform: translateY(-1px); }

.btn-danger {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border: 1px solid rgba(239,68,68,0.2);
}
.btn-danger:hover { background: var(--danger); color: #fff; }

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

.btn-sm { padding: 5px 12px; font-size: 0.75rem; }

/* ========== FORMS ========== */
.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Poppins', sans-serif;
    font-size: 0.85rem;
    transition: var(--transition);
}

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

select.form-control { cursor: pointer; }
select.form-control option { background: var(--bg-secondary); color: var(--text-primary); }

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* ========== MODAL ========== */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}

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

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 90%;
    max-width: 560px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 { font-size: 1rem; }

.modal-close {
    width: 32px; height: 32px;
    border: none; border-radius: 8px;
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}

.modal-close:hover { background: rgba(239,68,68,0.15); color: var(--danger); }
.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ========== BADGE ========== */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

.badge-success { background: rgba(34,197,94,0.15); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.15); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.15); color: var(--warning); }
.badge-info { background: rgba(59,130,246,0.15); color: var(--info); }

/* ========== TOAST ========== */
.toast-container {
    position: fixed;
    top: 80px; right: 20px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toast {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-size: 0.85rem;
    box-shadow: var(--shadow);
    animation: toastIn 0.3s ease;
    min-width: 280px;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }

@keyframes toastIn {
    from { opacity: 0; transform: translateX(100px); }
    to { opacity: 1; transform: translateX(0); }
}

/* ========== LOGIN ========== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0c1929 50%, #0a1628 100%);
    position: relative;
    overflow: hidden;
}

.login-page::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    top: -200px; right: -200px;
}

.login-page::after {
    content: '';
    position: absolute;
    width: 500px; height: 500px;
    background: radial-gradient(circle, var(--gold-glow) 0%, transparent 70%);
    bottom: -200px; left: -200px;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 400px;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    z-index: 1;
}

.login-card h1 {
    text-align: center;
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--gold), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
}

.login-card .subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.78rem;
    margin-bottom: 30px;
}

.login-error {
    background: rgba(239,68,68,0.1);
    border: 1px solid rgba(239,68,68,0.2);
    color: var(--danger);
    padding: 10px;
    border-radius: var(--radius-sm);
    font-size: 0.82rem;
    margin-bottom: 16px;
    text-align: center;
}

.login-card .btn-primary { width: 100%; justify-content: center; padding: 12px; font-size: 0.9rem; }

/* ========== POSTER PREVIEW ========== */
.poster-preview {
    max-width: 100%;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
}

.poster-actions {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    flex-wrap: wrap;
}

/* ========== SCHEDULE ASSIGNMENT ========== */
.assignment-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
}

.assignment-row {
    display: grid;
    grid-template-columns: 40px 1fr 1fr 50px;
    gap: 10px;
    align-items: center;
    padding: 8px 12px;
    background: rgba(0,0,0,0.15);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

.assignment-row .num {
    font-weight: 700;
    color: var(--gold);
    text-align: center;
}

.assignment-row .remove-btn {
    width: 30px; height: 30px;
    border: none; border-radius: 6px;
    background: rgba(239,68,68,0.1);
    color: var(--danger);
    cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}

.assignment-row .remove-btn:hover { background: var(--danger); color: #fff; }

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

.empty-state i { font-size: 3rem; margin-bottom: 16px; display: block; }
.empty-state p { font-size: 0.9rem; }

/* ========== SEARCH BAR ========== */
.search-bar {
    display: flex; gap: 10px; margin-bottom: 16px;
}

.search-bar .form-control { max-width: 300px; }

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .assignment-row { grid-template-columns: 30px 1fr; }
    .assignment-row select:last-of-type { grid-column: 1 / -1; }
    .login-card { width: 90%; padding: 24px; }
    .content-area { padding: 16px; }

    .mobile-toggle {
        display: flex !important;
    }
}

.mobile-toggle {
    display: none;
    width: 40px; height: 40px;
    border: none; border-radius: 8px;
    background: var(--bg-card);
    color: var(--text-primary);
    cursor: pointer;
    align-items: center; justify-content: center;
    font-size: 1.2rem;
}

/* Animations */
.fade-in { animation: fadeIn 0.4s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Tom Select Customization */
.ts-dropdown .option.disabled {
    display: none !important;
}
.ts-control {
    background: rgba(0,0,0,0.2) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-primary) !important;
    border-radius: var(--radius-sm) !important;
}
.ts-dropdown {
    background: var(--bg-secondary) !important;
    border: 1px solid var(--border) !important;
    color: var(--text-primary) !important;
}
.ts-dropdown .active {
    background: var(--accent-glow) !important;
    color: var(--accent) !important;
}
.ts-dropdown .option {
    padding: 8px 12px !important;
}
.sel-container {
    width: 100%;
}

/* ========== BULK PREVIEW MODAL ========== */
.preview-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.3s ease;
}
.preview-overlay.active { display: flex; }

.preview-modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 95vw;
    max-width: 1100px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    animation: fadeIn 0.3s ease;
}

.preview-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.preview-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
}
.preview-header h3 i { color: var(--accent); margin-right: 8px; }

.preview-close {
    width: 36px; height: 36px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}
.preview-close:hover {
    background: rgba(239,68,68,0.15);
    color: var(--danger);
    border-color: var(--danger);
}

.preview-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.summary-card {
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    text-align: center;
}
.summary-card .num {
    font-size: 1.6rem;
    font-weight: 700;
    line-height: 1;
}
.summary-card .label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.summary-card.total { background: rgba(59,130,246,0.1); }
.summary-card.total .num { color: var(--info); }
.summary-card.ok { background: rgba(34,197,94,0.1); }
.summary-card.ok .num { color: var(--success); }
.summary-card.err { background: rgba(239,68,68,0.1); }
.summary-card.err .num { color: var(--danger); }
.summary-card.dup { background: rgba(245,158,11,0.1); }
.summary-card.dup .num { color: var(--warning); }

.preview-filter {
    padding: 12px 24px;
    display: flex;
    gap: 8px;
    flex-shrink: 0;
    border-bottom: 1px solid var(--border);
}
.filter-btn {
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.preview-body {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}
.preview-body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.preview-body thead {
    position: sticky;
    top: 0;
    z-index: 10;
}
.preview-body thead th {
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    padding: 12px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.preview-body tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid rgba(255,255,255,0.03);
    color: var(--text-primary);
    vertical-align: middle;
}
.preview-body tbody tr:hover { background: rgba(255,255,255,0.03); }
.preview-body tbody tr.row-ok td:first-child { border-left: 3px solid var(--success); }
.preview-body tbody tr.row-error td:first-child { border-left: 3px solid var(--danger); }
.preview-body tbody tr.row-duplicate td:first-child { border-left: 3px solid var(--warning); }
.preview-body tbody tr.row-error { background: rgba(239,68,68,0.04); }
.preview-body tbody tr.row-duplicate { background: rgba(245,158,11,0.04); }

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 600;
    white-space: nowrap;
}
.status-pill.ok { background: rgba(34,197,94,0.15); color: var(--success); }
.status-pill.error { background: rgba(239,68,68,0.15); color: var(--danger); }
.status-pill.duplicate { background: rgba(245,158,11,0.15); color: var(--warning); }
.error-detail {
    font-size: 0.72rem;
    color: var(--danger);
    margin-top: 3px;
    font-style: italic;
}

.preview-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}
.preview-footer .info {
    font-size: 0.8rem;
    color: var(--text-secondary);
}
.preview-footer .info strong { color: var(--success); }
.preview-actions { display: flex; gap: 8px; }

@media (max-width: 600px) {
    .preview-summary { grid-template-columns: repeat(2, 1fr); }
    .preview-modal { width: 100vw; max-height: 95vh; border-radius: 12px 12px 0 0; }
}