/* ============================================
   MCP Flow Visualizer - Theme Colors
   Project-specific colors and overrides
   ============================================ */

:root {
    /* MCP Component Colors - Warm Amber Theme */
    --color-host: #D4A574;
    --color-host-end: #B8956A;
    --color-client: #7FACA3;
    --color-client-end: #5C8A82;
    --color-server: #8BA888;
    --color-server-end: #6B8868;

    /* Messages */
    --color-request: #E07A5F;
    --color-response: #E9C46A;
    --color-error: #C44536;

    /* Accents */
    --accent-glow: rgba(212, 165, 116, 0.4);
    --border-subtle: var(--border-color);
    --bg-tertiary: var(--bg-surface-light);

    /* Theme accent for controls */
    --color-accent-start: var(--color-host);
    --color-accent-end: var(--color-client);
}

/* MCP Logo Gradient */
.viz-logo {
    background: linear-gradient(135deg, var(--color-host), var(--color-client)) !important;
    -webkit-background-clip: text !important;
    -webkit-text-fill-color: transparent !important;
    background-clip: text !important;
}

/* Base */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
}

/* Navbar */
.navbar {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.5rem 1rem;
}

.navbar-brand {
    font-weight: 600;
    color: var(--text-primary) !important;
}

.brand-icon {
    background: linear-gradient(135deg, var(--color-host), var(--color-client));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    margin-right: 0.5rem;
}

.lesson-nav .nav-link {
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    transition: var(--transition-fast);
    font-size: 0.9rem;
}

.lesson-nav .nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.lesson-nav .nav-link.active {
    color: var(--color-host);
    background-color: rgba(212, 165, 116, 0.1);
}

/* Sidebar */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    min-height: calc(100vh - 50px);
    overflow-y: auto;
}

/* Lesson list */
.lesson-list {
    margin: 0;
    padding: 0;
}

.lesson-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    margin-bottom: 0.25rem;
    transition: var(--transition-fast);
}

.lesson-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.lesson-item.active {
    background-color: rgba(212, 165, 116, 0.15);
    color: var(--color-host);
}

.lesson-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background-color: var(--bg-tertiary);
    font-size: 0.8rem;
    font-weight: 600;
    flex-shrink: 0;
}

.lesson-item.active .lesson-number {
    background-color: var(--color-host);
    color: var(--bg-primary);
}

.lesson-info {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.lesson-name {
    font-weight: 500;
    font-size: 0.9rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lesson-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.lesson-item.active .lesson-desc {
    color: var(--text-secondary);
}

/* Main content */
.main-content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

/* Canvas container */
.canvas-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: calc(100vh - 140px);
    padding: 1rem;
}

#canvas {
    width: 100%;
    height: auto;
    display: block;
}

/* Lesson description overlay */
.lesson-description {
    position: absolute;
    top: 1rem;
    left: 1rem;
    max-width: 350px;
    z-index: 10;
}

.description-card {
    background: rgba(30, 36, 30, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
}

.description-card .card-body {
    padding: 1rem;
}

.description-card .card-title {
    color: var(--color-host);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.description-card .card-text {
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 0;
}

/* MCP-themed control button */
.viz-control-btn-primary {
    background: linear-gradient(135deg, var(--color-host), var(--color-client)) !important;
    color: white !important;
}

.viz-control-btn-primary:hover {
    filter: brightness(1.1);
}

/* Info panel */
.info-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    height: calc(100vh - 180px);
    position: sticky;
    top: 80px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.info-panel-header {
    padding: 1rem;
    border-bottom: 1px solid var(--border-subtle);
    background-color: var(--bg-tertiary);
}

.info-panel-header h6 {
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.info-panel-content {
    padding: 1rem;
    overflow-y: auto;
    flex: 1;
}

/* Entity info styling */
.entity-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.entity-badge.user {
    background-color: rgba(212, 165, 116, 0.2);
    color: var(--color-host);
}

.entity-badge.app {
    background-color: rgba(212, 165, 116, 0.2);
    color: var(--color-host);
}

.entity-badge.llm {
    background-color: rgba(127, 172, 163, 0.2);
    color: var(--color-client);
}

.entity-badge.server {
    background-color: rgba(139, 168, 136, 0.2);
    color: var(--color-server);
}

.entity-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.entity-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.entity-details {
    background-color: var(--bg-tertiary);
    border-radius: 6px;
    padding: 1rem;
}

.entity-details h6 {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.75rem;
}

.entity-details ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.entity-details li {
    color: var(--text-secondary);
    font-size: 0.85rem;
    padding: 0.25rem 0;
    padding-left: 1rem;
    position: relative;
}

.entity-details li::before {
    content: ">";
    position: absolute;
    left: 0;
    color: var(--color-host);
}

/* SVG entity styles */
.entity-group {
    cursor: pointer;
}

.entity-group:hover .entity-rect {
    filter: url(#glow);
}

.entity-label {
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-weight: 600;
    fill: var(--text-primary);
}

.entity-sublabel {
    font-family: 'Segoe UI', system-ui, sans-serif;
    font-size: 12px;
    fill: var(--text-secondary);
}

/* Connection lines */
.connection-line {
    stroke: var(--text-muted);
    stroke-width: 2;
    stroke-dasharray: 8, 4;
    fill: none;
}

/* Message styles */
.message {
    filter: url(#glow);
}

/* Offcanvas */
.offcanvas {
    background-color: var(--bg-secondary);
}

.offcanvas-header {
    border-bottom: 1px solid var(--border-subtle);
}

/* Responsive */
@media (max-width: 991.98px) {
    .info-panel {
        height: auto;
        position: static;
        margin-top: 1rem;
    }
}

/* Animations */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

@keyframes glow-pulse {
    0%, 100% { filter: drop-shadow(0 0 4px var(--accent-glow)); }
    50% { filter: drop-shadow(0 0 12px var(--accent-glow)); }
}

.pulse {
    animation: pulse 2s ease-in-out infinite;
}