/* ==============================================================================
   ReviewGate Pro - Unified Enterprise Dashboard Stylesheet (app.css)
   Clean, Responsive, Fast Architecture
   ============================================================================== */

:root {
    --primary: #3b82f6;
    --primary-dark: #1d4ed8;
    --primary-light: #eff6ff;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --dark: #0f172a;
    --dark-surface: #1e293b;
    --body-bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--body-bg);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

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

/* Sidebar */
.sidebar {
    width: 260px;
    background: var(--dark);
    color: #ffffff;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s ease;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand-logo {
    max-height: 36px;
    max-width: 140px;
    object-fit: contain;
}

.sidebar-brand-text {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.02em;
    text-decoration: none;
}

.sidebar-badge {
    font-size: 10px;
    text-transform: uppercase;
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 700;
    margin-left: auto;
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    color: #94a3b8;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.15s ease;
}

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

.nav-link.active {
    color: #ffffff;
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.nav-icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
    stroke: currentColor;
    fill: none;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.user-snippet {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.04);
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--primary);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.user-info {
    flex: 1;
    overflow: hidden;
}

.user-name {
    font-size: 13px;
    font-weight: 600;
    color: #ffffff;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.user-role {
    font-size: 11px;
    color: #94a3b8;
}

/* Main Content Area */
.main-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.topbar {
    height: 64px;
    background: var(--card-bg);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 32px;
}

.topbar-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.topbar-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}

.content-body {
    flex: 1;
    padding: 32px;
    overflow-y: auto;
}

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

.stat-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 22px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.stat-content h4 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.stat-content .stat-number {
    font-size: 26px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.stat-icon-wrapper {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon-wrapper.blue { background: #eff6ff; color: #3b82f6; }
.stat-icon-wrapper.green { background: #ecfdf5; color: #10b981; }
.stat-icon-wrapper.amber { background: #fffbeb; color: #f59e0b; }
.stat-icon-wrapper.purple { background: #faf5ff; color: #a855f7; }

/* Panels & Cards */
.panel {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    margin-bottom: 28px;
    overflow: hidden;
}

.panel-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.panel-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
}

.panel-body {
    padding: 24px;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
    text-align: left;
}

.data-table th {
    background: #f8fafc;
    color: var(--text-secondary);
    font-weight: 600;
    padding: 12px 18px;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

.data-table td {
    padding: 14px 18px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
    vertical-align: middle;
}

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

.data-table tbody tr:hover {
    background-color: #f8fafc;
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success { background: #ecfdf5; color: #047857; }
.badge-warning { background: #fffbeb; color: #b45309; }
.badge-danger { background: #fef2f2; color: #b91c1c; }
.badge-info { background: #eff6ff; color: #1d4ed8; }
.badge-secondary { background: #f1f5f9; color: #475569; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 9px 16px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    transition: all 0.15s ease;
}

.btn-primary { background: var(--primary); color: #ffffff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #ffffff; color: var(--text-primary); border-color: var(--border); }
.btn-secondary:hover { background: #f8fafc; border-color: #cbd5e1; }
.btn-danger { background: var(--danger); color: #ffffff; }
.btn-danger:hover { background: #dc2626; }
.btn-success { background: var(--success); color: #ffffff; }
.btn-success:hover { background: #059669; }
.btn-sm { padding: 6px 10px; font-size: 12px; border-radius: var(--radius-sm); }

/* Forms */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 18px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-control, .form-select {
    width: 100%;
    padding: 9px 14px;
    font-size: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #ffffff;
    color: var(--text-primary);
    outline: none;
    font-family: inherit;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.form-control:disabled, .form-select:disabled {
    background-color: #f1f5f9;
    color: #94a3b8;
    cursor: not-allowed;
}

.form-text {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 5px;
}

/* Alerts */
.alert {
    padding: 14px 18px;
    border-radius: var(--radius-md);
    font-size: 14px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.alert-success { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-danger { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }
.alert-info { background: #eff6ff; color: #1e40af; border: 1px solid #bfdbfe; }
.btn-close { background: transparent; border: none; font-size: 18px; cursor: pointer; color: inherit; line-height: 1; }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(4px);
    z-index: 999;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.modal-card {
    background: #ffffff;
    width: 100%;
    max-width: 520px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.96); }
    to { opacity: 1; transform: scale(1); }
}

.modal-header {
    padding: 18px 24px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 16px;
    font-weight: 700;
}

.modal-body {
    padding: 24px;
    max-height: calc(85vh - 120px);
    overflow-y: auto;
}

.modal-footer {
    padding: 14px 24px;
    background: #f8fafc;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* Auth Pages (Login / Signup) */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: 36px 32px;
    box-shadow: var(--shadow-lg);
}

.auth-brand {
    text-align: center;
    margin-bottom: 28px;
}

.auth-brand h2 {
    font-size: 22px;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.02em;
}

.auth-brand p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .app-layout { flex-direction: column; }
    .sidebar { width: 100%; }
    .topbar { padding: 0 16px; }
    .content-body { padding: 16px; }
    .stats-grid { grid-template-columns: 1fr; }
}