:root {
    --bg-dark: #0b0f19;
    --bg-card: rgba(17, 24, 39, 0.75);
    --bg-card-hover: rgba(31, 41, 55, 0.85);
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(99, 102, 241, 0.3);
    --primary: #6366f1;
    --primary-light: #818cf8;
    --accent-cyan: #06b6d4;
    --accent-emerald: #10b981;
    --accent-amber: #f59e0b;
    --accent-rose: #f43f5e;
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

[data-theme="light"] {
    --bg-dark: #f8fafc;
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-card-hover: rgba(241, 245, 249, 0.95);
    --border-color: rgba(0, 0, 0, 0.1);
    --border-highlight: rgba(99, 102, 241, 0.5);
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #4f46e5;
    --primary-light: #4338ca;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-link-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.35rem 0.65rem;
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-link-btn:hover {
    color: var(--text-main);
    background: rgba(99, 102, 241, 0.1);
}

.theme-select {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.35rem 0.6rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
}


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

body {
    background-color: var(--bg-dark);
    background-image: 
        radial-gradient(circle at 15% 15%, rgba(99, 102, 241, 0.12) 0%, transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
    color: var(--text-main);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Glassmorphism utility */
.glass-panel {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Top Navigation Header */
header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background: rgba(11, 15, 25, 0.8);
    backdrop-filter: blur(12px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--accent-cyan));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 16px rgba(99, 102, 241, 0.4);
}

.logo-icon svg {
    width: 22px;
    height: 22px;
    fill: #ffffff;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, #ffffff, #9ca3af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo-version {
    font-size: 0.75rem;
    font-family: var(--font-mono);
    background: rgba(99, 102, 241, 0.15);
    color: var(--primary-light);
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.system-metrics {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.metric-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--accent-emerald);
    box-shadow: 0 0 10px var(--accent-emerald);
    position: relative;
}

.status-dot.pulse::after {
    content: '';
    position: absolute;
    top: -3px;
    left: -3px;
    right: -3px;
    bottom: -3px;
    border-radius: 50%;
    border: 2px solid var(--accent-emerald);
    animation: pulse-ring 2s infinite;
}

@keyframes pulse-ring {
    0% { transform: scale(0.8); opacity: 0.8; }
    100% { transform: scale(1.8); opacity: 0; }
}

.btn {
    background: linear-gradient(135deg, var(--primary), #4f46e5);
    color: white;
    border: none;
    padding: 0.55rem 1.1rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.35);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px 0 rgba(99, 102, 241, 0.5);
    filter: brightness(1.1);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    box-shadow: none;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Main Container Grid */
main {
    display: grid;
    grid-template-columns: 320px 1fr 400px;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
    flex: 1;
}

@media (max-width: 1280px) {
    main {
        grid-template-columns: 1fr;
    }
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.section-title {
    font-size: 1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-main);
}

/* Left Column: Sessions & Controls */
.sessions-card {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.session-item {
    padding: 0.85rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    transition: all 0.2s ease;
}

.session-item.active {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.1);
}

.session-item:hover {
    border-color: var(--border-highlight);
}

.session-id {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-cyan);
    margin-bottom: 0.25rem;
}

.session-goal {
    font-size: 0.85rem;
    color: var(--text-main);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Center Column: Visual Workflow Graph & State Inspector */
.workflow-card {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.graph-container {
    display: flex;
    align-items: center;
    justify-content: space-around;
    padding: 2.5rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
    position: relative;
}

.node {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    z-index: 2;
}

.node-box {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    background: rgba(17, 24, 39, 0.9);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.node.active .node-box {
    border-color: var(--primary);
    box-shadow: 0 0 24px rgba(99, 102, 241, 0.6);
    transform: scale(1.08);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3), rgba(6, 182, 212, 0.3));
}

.node-label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
}

.node.active .node-label {
    color: var(--primary-light);
}

.edge-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--border-color), var(--primary-light), var(--border-color));
    margin: 0 0.5rem;
    position: relative;
}

.edge-line::after {
    content: '►';
    position: absolute;
    right: -4px;
    top: -7px;
    font-size: 10px;
    color: var(--primary-light);
}

.state-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.state-stat {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: 10px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-val {
    font-size: 1.1rem;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--text-main);
}

.progress-bar-bg {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    margin-top: 0.5rem;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-cyan), var(--primary));
    width: 20%;
    transition: width 0.3s ease;
}

/* Right Column: Live Telemetry Stream */
.telemetry-card {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 120px);
}

.filter-pills {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
    overflow-x: auto;
    padding-bottom: 0.25rem;
}

.pill {
    font-size: 0.75rem;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
}

.pill.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.event-feed {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
    padding-right: 0.25rem;
}

.event-item {
    background: rgba(15, 23, 42, 0.6);
    border-left: 3px solid var(--primary);
    border-radius: 0 8px 8px 0;
    padding: 0.75rem;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}

.event-item:hover {
    background: rgba(15, 23, 42, 0.9);
}

.event-item.session_initialized { border-left-color: var(--accent-cyan); }
.event-item.state_update { border-left-color: var(--accent-emerald); }
.event-item.handoff_request { border-left-color: var(--accent-amber); }

.event-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.35rem;
}

.event-type {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-main);
}

.event-time {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.event-data {
    font-family: var(--font-mono);
    color: var(--text-muted);
    word-break: break-all;
    background: rgba(0, 0, 0, 0.3);
    padding: 0.4rem;
    border-radius: 4px;
    font-size: 0.75rem;
    max-height: 100px;
    overflow-y: auto;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.modal-overlay.open, .modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-box {
    width: 100%;
    max-width: 500px;
    padding: 1.75rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.4rem;
}

.form-input, .form-select {
    width: 100%;
    background: rgba(15, 23, 42, 0.9);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 0.75rem;
    border-radius: 8px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
}

.form-input:focus, .form-select:focus {
    border-color: var(--primary);
}

/* User Admin Table */
.data-table {
    border-collapse: collapse;
}

.data-table th, .data-table td {
    text-align: left;
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.data-table th {
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
}

.data-table select.form-select {
    padding: 0.35rem 0.5rem;
    width: auto;
}

/* Trace DAG Explorer Waterfall */
.trace-span-row {
    display: grid;
    grid-template-columns: 110px 1fr 70px;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
}

.trace-agent-name {
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.trace-bar-track {
    position: relative;
    height: 10px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 4px;
}

.trace-bar-fill {
    position: absolute;
    top: 0;
    height: 100%;
    min-width: 4px;
    border-radius: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--primary));
}

.trace-duration {
    text-align: right;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Structured Logs Viewer */
.log-row {
    display: grid;
    grid-template-columns: 150px 70px 140px 1fr;
    gap: 0.5rem;
    padding: 0.35rem 0;
    border-bottom: 1px solid var(--border-color);
    align-items: start;
}

.log-timestamp {
    color: var(--text-muted);
    white-space: nowrap;
}

.log-logger {
    color: var(--accent-cyan);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.log-message {
    color: var(--text-main);
    word-break: break-word;
}

.log-level {
    font-weight: 600;
    text-align: center;
    border-radius: 4px;
    padding: 0.05rem 0.3rem;
    height: fit-content;
}

.log-level-DEBUG { color: var(--text-muted); }
.log-level-INFO { color: var(--accent-cyan); }
.log-level-WARNING { color: var(--accent-amber); }
.log-level-ERROR, .log-level-CRITICAL { color: var(--accent-rose, #f43f5e); }

/* Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.1);
}

::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}