:root {
    --bg-color: #0b0f19;
    --card-bg: #151c2c;
    --card-hover: #1e273e;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #232e47;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --accent: #8b5cf6;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: rgba(21, 28, 44, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
}

.env-badge, .user-badge {
    background: #0f172a;
    border: 1px solid var(--border-color);
    padding: 0.3rem 0.75rem;
    border-radius: 9999px;
    color: var(--text-secondary);
}

.main-content {
    max-width: 1300px;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex: 1;
    width: 100%;
    box-sizing: border-box;
}

.header-banner {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 12px;
    margin-bottom: 2rem;
}

.flex-banner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.5rem;
}

.banner-text {
    flex: 1;
}

.banner-action {
    flex-shrink: 0;
}

.btn-results {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 1.4rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    width: auto;
}

.btn-results:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.45);
}

.header-banner h1 {
    margin: 0 0 0.5rem 0;
    font-size: 1.8rem;
}

.header-banner p {
    margin: 0;
    color: var(--text-secondary);
    max-width: 900px;
}

.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--warning);
    color: #fef3c7;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 1.5rem;
}

.scenario-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

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

.card-header {
    margin-bottom: 0.75rem;
}

.scenario-id-badge {
    font-size: 0.75rem;
    font-weight: 700;
    color: #60a5fa;
    text-transform: uppercase;
    background: rgba(59, 130, 246, 0.15);
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
}

.scenario-card h2 {
    font-size: 1.15rem;
    margin: 0.5rem 0 0 0;
    color: #fff;
}

.scenario-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
}

.review-points-preview {
    background: #0f172a;
    border: 1px solid #1e293b;
    border-radius: 8px;
    padding: 0.75rem 1rem;
    margin-bottom: 1.25rem;
}

.review-points-preview h4 {
    margin: 0 0 0.5rem 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.review-points-preview ul {
    margin: 0;
    padding-left: 1.2rem;
    font-size: 0.85rem;
    color: #cbd5e1;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.65rem 1.25rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: background-color 0.15s ease;
    font-size: 0.9rem;
}

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

.card-actions .btn {
    width: 100%;
}

.run-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 1rem;
    margin-bottom: 1.5rem;
}

.btn-back {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
}

.run-title-area h1 { margin: 0.4rem 0 0.2rem 0; font-size: 1.6rem; }
.run-subtitle { margin: 0; color: var(--text-secondary); font-size: 0.95rem; }

.run-controls { display: flex; align-items: center; gap: 1rem; }
.badge-status { padding: 0.35rem 0.85rem; border-radius: 9999px; font-weight: 700; font-size: 0.8rem; }
.status-running { background: #d97706; color: #fff; }
.status-completed { background: #059669; color: #fff; }

.run-layout {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 1.5rem;
}

.main-timeline-panel, .sidebar-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 { margin: 0; font-size: 1.1rem; }
.count-tag { font-size: 0.85rem; color: var(--text-secondary); }

.timeline-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
    min-height: 500px;
    max-height: 75vh;
    overflow-y: auto;
}

.empty-timeline-notice {
    color: var(--text-secondary);
    text-align: center;
    padding: 3rem;
    font-style: italic;
}

.event-card {
    background: #0f172a;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.event-card.user_message { border-left: 4px solid var(--primary); }
.event-card.agent_message { border-left: 4px solid var(--success); }
.event-card.state_diff { border-left: 4px solid var(--accent); }
.event-card.error { border-left: 4px solid var(--danger); }

.event-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.5rem;
}

.badge { font-size: 0.7rem; font-weight: 700; padding: 0.2rem 0.5rem; border-radius: 4px; }
.badge-user { background: #2563eb; color: #fff; }
.badge-agent { background: #059669; color: #fff; }
.badge-request { background: #475569; color: #fff; }
.badge-response { background: #334155; color: #fff; }
.badge-diff { background: #7c3aed; color: #fff; }
.badge-error { background: #dc2626; color: #fff; }

.event-title { font-weight: 600; font-size: 0.95rem; color: #f1f5f9; }
.event-time { font-size: 0.8rem; color: var(--text-secondary); }

.user-msg-text { font-size: 1.05rem; color: #60a5fa; font-weight: 500; }
.agent-msg-text { font-size: 0.95rem; color: #e2e8f0; white-space: pre-wrap; background: #090d16; padding: 0.75rem; border-radius: 6px; border: 1px solid #1e293b; }

.review-points-card, .state-monitor-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.25rem;
}

.review-points-card h3, .state-monitor-card h3 { margin-top: 0; font-size: 1rem; color: #94a3b8; }
.review-points-card ul { margin: 0; padding-left: 1.2rem; font-size: 0.85rem; color: #cbd5e1; }

pre { background: #090d16; padding: 0.75rem; border-radius: 6px; overflow-x: auto; font-size: 0.8rem; color: #38bdf8; margin: 0; }
.diff-table { width: 100%; border-collapse: collapse; margin-top: 0.5rem; font-size: 0.85rem; }
.diff-table th { text-align: left; padding: 0.4rem; color: var(--text-secondary); border-bottom: 1px solid var(--border-color); }
.diff-table td { padding: 0.4rem; border-bottom: 1px solid #1e293b; }

.hidden { display: none !important; }

.footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* Navbar Tabs */
.nav-left {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-tabs {
    display: flex;
    gap: 0.5rem;
}

.nav-tab {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-tab:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.05);
}

.nav-tab.active {
    color: #fff;
    background: var(--primary);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 1.25rem;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
}

.stat-success .stat-value { color: var(--success); }
.stat-warning .stat-value { color: var(--warning); }

/* Filter Panel */
.filter-panel {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.search-input {
    flex: 1;
    min-width: 250px;
    background: #0f172a;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.search-input:focus, .status-select:focus {
    outline: none;
    border-color: var(--primary);
}

.status-select {
    background: #0f172a;
    border: 1px solid var(--border-color);
    color: #fff;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

/* Reports Table */
.reports-table-container {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow-x: auto;
}

.reports-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.reports-table th {
    background: #0f172a;
    color: var(--text-secondary);
    text-align: left;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.reports-table td {
    padding: 1rem;
    border-bottom: 1px solid #1e293b;
    vertical-align: middle;
}

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

.reports-table tr:hover td {
    background: var(--card-hover);
}

.col-date strong { display: block; color: #f1f5f9; }
.folder-tag { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.2rem; }

.sc-badge {
    display: inline-block;
    background: #0f172a;
    border: 1px solid var(--border-color);
    padding: 0.15rem 0.45rem;
    border-radius: 4px;
    font-size: 0.75rem;
    color: #93c5fd;
    margin-bottom: 0.25rem;
}

.sc-title { font-weight: 600; color: #fff; }

.col-actions {
    display: flex;
    gap: 0.4rem;
    flex-wrap: wrap;
}

.btn-action {
    display: inline-block;
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.78rem;
    font-weight: 500;
    transition: opacity 0.2s;
}

.btn-action:hover { opacity: 0.85; }
.btn-html { background: #2563eb; color: #fff; }
.btn-clean { background: #059669; color: #fff; }
.btn-json { background: #475569; color: #fff; }

.empty-state-notice {
    text-align: center;
    padding: 3rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
}