/* ═══════════════════════════════════════════
   QBrains LeadEngine — Premium Dark UI
   Mobile-first, responsive design
   ═══════════════════════════════════════════ */

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

/* ─── CSS Variables ─── */
:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    --bg-hover: #273548;
    --bg-input: #0f172a;
    
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-green: #10b981;
    --accent-green-hover: #059669;
    --accent-purple: #8b5cf6;
    --accent-red: #ef4444;
    --accent-yellow: #f59e0b;
    --accent-cyan: #06b6d4;
    
    --border: #334155;
    --border-light: #475569;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    
    --sidebar-width: 260px;
    --header-height: 64px;
    
    --transition: 0.2s ease;
}

/* ─── Reset & Base ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; -webkit-text-size-adjust: 100%; }

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

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

/* ─── Login Page ─── */
.login-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    background: radial-gradient(ellipse at top, #1e293b 0%, #0f172a 60%);
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow);
}

.login-card .logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-card .logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card .logo p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 4px;
}

/* ─── Form Elements ─── */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

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

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

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 100px; }

/* ─── Buttons ─── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary { background: var(--accent-blue); color: #fff; }
.btn-primary:hover { background: var(--accent-blue-hover); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(59,130,246,0.3); }

.btn-success { background: var(--accent-green); color: #fff; }
.btn-success:hover { background: var(--accent-green-hover); }

.btn-danger { background: var(--accent-red); color: #fff; }
.btn-danger:hover { background: #dc2626; }

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

.btn-sm { padding: 6px 14px; font-size: 0.8rem; border-radius: var(--radius-xs); }
.btn-block { width: 100%; justify-content: center; }
.btn-icon { padding: 8px; width: 36px; height: 36px; justify-content: center; }

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

/* ─── Sidebar ─── */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    padding: 20px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-brand h2 {
    font-size: 1rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.sidebar-brand .version {
    font-size: 0.65rem;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
}

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

.nav-section {
    margin-bottom: 24px;
}

.nav-section-title {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    padding: 0 12px;
    margin-bottom: 8px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}

.nav-link:hover { background: var(--bg-hover); color: var(--text-primary); }
.nav-link.active { background: rgba(59, 130, 246, 0.12); color: var(--accent-blue); }
.nav-link .nav-icon { font-size: 1.1rem; width: 24px; text-align: center; }
.nav-link .nav-badge {
    margin-left: auto;
    background: var(--accent-red);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-footer .user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    color: #fff;
    flex-shrink: 0;
}

.sidebar-footer .user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-footer .user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-footer .user-role {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: capitalize;
}

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

.content-header {
    padding: 20px 28px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 50;
}

.content-header h1 {
    font-size: 1.3rem;
    font-weight: 700;
}

.content-header .header-actions {
    display: flex;
    gap: 8px;
    align-items: center;
}

.content-body {
    padding: 24px 28px;
}

/* ─── Mobile hamburger ─── */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 4px;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    z-index: 90;
}

/* ─── Cards ─── */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.card-header h3 {
    font-size: 0.95rem;
    font-weight: 600;
}

.card-body { padding: 20px; }
.card-footer { padding: 12px 20px; border-top: 1px solid var(--border); }

/* ─── KPI Grid ─── */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.kpi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    transition: transform var(--transition), box-shadow var(--transition);
}

.kpi-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.kpi-card .kpi-icon {
    font-size: 1.8rem;
    margin-bottom: 12px;
}

.kpi-card .kpi-value {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
    margin-bottom: 4px;
}

.kpi-card .kpi-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.kpi-card .kpi-change {
    margin-top: 8px;
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 4px;
}

.kpi-change.up { color: var(--accent-green); }
.kpi-change.down { color: var(--accent-red); }

/* ─── Charts Grid ─── */
.charts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 24px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.chart-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.chart-card canvas {
    max-height: 250px;
}

/* ─── Tables ─── */
.table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

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

.data-table th {
    text-align: left;
    padding: 12px 16px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
    font-weight: 600;
}

.data-table td {
    padding: 12px 16px;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(51, 65, 85, 0.5);
    vertical-align: middle;
}

.data-table tbody tr {
    transition: background var(--transition);
    cursor: pointer;
}

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

.data-table .lead-name {
    font-weight: 600;
    color: var(--text-primary);
}

.data-table .lead-email {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ─── Badges ─── */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.73rem;
    font-weight: 600;
    white-space: nowrap;
}

.badge-hot { background: rgba(239,68,68,0.15); color: #f87171; }
.badge-warm { background: rgba(245,158,11,0.15); color: #fbbf24; }
.badge-cold { background: rgba(6,182,212,0.15); color: #22d3ee; }
.badge-new { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-contacted { background: rgba(16,185,129,0.15); color: #34d399; }
.badge-negotiation { background: rgba(139,92,246,0.15); color: #a78bfa; }
.badge-won { background: rgba(16,185,129,0.2); color: #34d399; }
.badge-lost { background: rgba(239,68,68,0.15); color: #f87171; }
.badge-inactive { background: rgba(100,116,139,0.15); color: #94a3b8; }
.badge-pending { background: rgba(245,158,11,0.15); color: #fbbf24; }
.badge-approved { background: rgba(59,130,246,0.15); color: #60a5fa; }
.badge-sent { background: rgba(16,185,129,0.2); color: #34d399; }
.badge-failed { background: rgba(239,68,68,0.2); color: #f87171; }
.badge-skipped { background: rgba(100,116,139,0.15); color: #94a3b8; }
.badge-default { background: var(--bg-tertiary); color: var(--text-secondary); }

/* ─── Timeline ─── */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 8px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding-bottom: 24px;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -24px;
    top: 4px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent-blue);
    border: 2px solid var(--bg-primary);
}

.timeline-item.type-email_received::before { background: var(--accent-cyan); }
.timeline-item.type-ai_reply_sent::before { background: var(--accent-green); }
.timeline-item.type-phone_call::before { background: var(--accent-yellow); }
.timeline-item.type-note::before { background: var(--accent-purple); }
.timeline-item.type-status_change::before { background: var(--accent-red); }

.timeline-title {
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

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

/* ─── Flash Messages ─── */
.flash {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 16px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
    animation: flashIn 0.3s ease;
}

.flash-success { background: rgba(16,185,129,0.12); border: 1px solid rgba(16,185,129,0.3); color: var(--accent-green); }
.flash-error { background: rgba(239,68,68,0.12); border: 1px solid rgba(239,68,68,0.3); color: var(--accent-red); }
.flash-warning { background: rgba(245,158,11,0.12); border: 1px solid rgba(245,158,11,0.3); color: var(--accent-yellow); }
.flash-info { background: rgba(59,130,246,0.12); border: 1px solid rgba(59,130,246,0.3); color: var(--accent-blue); }

@keyframes flashIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: translateY(0); } }

/* ─── Filters Bar ─── */
.filters-bar {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: center;
}

.filters-bar .form-control {
    width: auto;
    min-width: 140px;
    padding: 8px 12px;
    font-size: 0.85rem;
}

.search-input {
    position: relative;
    flex: 1;
    min-width: 200px;
}

.search-input input {
    padding-left: 36px;
}

.search-input::before {
    content: '🔍';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.85rem;
}

/* ─── Details Grid ─── */
.detail-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.detail-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.detail-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.detail-value {
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* ─── AI Reply Preview ─── */
.reply-preview {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 16px;
    margin-top: 12px;
    line-height: 1.7;
    font-size: 0.9rem;
}

.reply-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 16px;
}

.reply-tab {
    padding: 8px 16px;
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-secondary);
    transition: all var(--transition);
}

.reply-tab:hover { background: var(--bg-hover); }
.reply-tab.active { background: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }
.reply-tab.active.claude { background: var(--accent-purple); border-color: var(--accent-purple); }

/* ─── Funnel ─── */
.funnel { display: flex; flex-direction: column; gap: 8px; }

.funnel-stage {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--bg-input);
    border-radius: var(--radius-sm);
}

.funnel-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.funnel-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 0.5s ease;
}

.funnel-label { font-size: 0.85rem; min-width: 100px; }
.funnel-count { font-size: 0.85rem; font-weight: 600; min-width: 30px; text-align: right; }

/* ─── Gauge ─── */
.gauge-container {
    display: flex;
    justify-content: center;
    padding: 12px 0;
}

/* ─── Pagination ─── */
.pagination {
    display: flex;
    gap: 4px;
    justify-content: center;
    margin-top: 20px;
    flex-wrap: wrap;
}

.pagination a, .pagination span {
    padding: 8px 14px;
    border-radius: var(--radius-xs);
    font-size: 0.85rem;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    transition: all var(--transition);
}

.pagination a:hover { background: var(--bg-hover); color: var(--text-primary); }
.pagination .active { background: var(--accent-blue); color: #fff; border-color: var(--accent-blue); }

/* ─── Modal ─── */
.modal-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 200;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

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

.modal {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
}

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

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

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 4px;
}

.modal-body { padding: 20px; }
.modal-footer { padding: 16px 20px; border-top: 1px solid var(--border); display: flex; gap: 8px; justify-content: flex-end; }

/* ─── Empty State ─── */
.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--text-muted);
}

.empty-state .empty-icon { font-size: 3rem; margin-bottom: 12px; }
.empty-state h3 { font-size: 1.1rem; color: var(--text-secondary); margin-bottom: 8px; }
.empty-state p { font-size: 0.9rem; }

/* ─── Responsive ─── */
@media (max-width: 1024px) {
    .kpi-grid { grid-template-columns: repeat(2, 1fr); }
    .charts-grid { grid-template-columns: 1fr; }
    .detail-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.open { transform: translateX(0); }
    .sidebar-overlay.show { display: block; }
    
    .mobile-toggle { display: block; }
    
    .main-content { margin-left: 0; }
    
    .content-header {
        padding: 16px 20px;
    }
    .content-header h1 { font-size: 1.1rem; }
    
    .content-body { padding: 16px; }
    
    .kpi-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .kpi-card { padding: 14px; }
    .kpi-card .kpi-value { font-size: 1.5rem; }
    .kpi-card .kpi-label { font-size: 0.7rem; }
    
    .filters-bar {
        flex-direction: column;
    }
    .filters-bar .form-control,
    .search-input { width: 100%; min-width: 0; }
    
    .data-table th, .data-table td {
        padding: 10px 12px;
        font-size: 0.8rem;
    }
    
    .card-body { padding: 16px; }
    
    .login-card { padding: 28px; }
    
    .reply-tabs { flex-wrap: wrap; }
    
    .btn { padding: 8px 16px; font-size: 0.85rem; }
    
    .modal { max-width: 100%; }
}

@media (max-width: 480px) {
    .kpi-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .kpi-card .kpi-value { font-size: 1.3rem; }
    .content-body { padding: 12px; }
    html { font-size: 14px; }
}

/* ─── Utilities ─── */
.flex { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.mb-4 { margin-bottom: 4px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mt-16 { margin-top: 16px; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.75rem; }
.text-right { text-align: right; }
.text-center { text-align: center; }
.font-semibold { font-weight: 600; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hidden { display: none !important; }