/* Canvas panel — side panel (desktop) / overlay (mobile) for rich content */

.canvas-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 400px;
    max-width: 100vw;
    height: 100dvh;
    background: var(--bg-main);
    border-left: 1px solid rgba(var(--identity-accent-rgb), 0.15);
    z-index: 200;
    display: flex;
    flex-direction: column;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.08);
    transform: translateX(100%);
    transition: transform 0.3s ease;
}

.canvas-panel.open {
    display: flex;
    transform: translateX(0);
}

.canvas-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    border-bottom: 1px solid rgba(var(--identity-accent-rgb), 0.12);
    background: var(--bg-chat);
    flex-shrink: 0;
}

.canvas-title {
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.canvas-close-btn {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: background 0.15s;
}

.canvas-close-btn:hover {
    background: rgba(var(--identity-accent-rgb), 0.1);
}

.canvas-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 18px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--text-primary);
    -webkit-overflow-scrolling: touch;
}

/* Markdown rendering inside canvas */
.canvas-content h1,
.canvas-content h2,
.canvas-content h3 {
    font-family: var(--font-display);
    margin: 1em 0 0.5em;
    color: var(--identity-accent);
}

.canvas-content h1 { font-size: 1.3rem; }
.canvas-content h2 { font-size: 1.15rem; }
.canvas-content h3 { font-size: 1.05rem; }

.canvas-content p {
    margin: 0.5em 0;
}

.canvas-content pre {
    background: rgba(0, 0, 0, 0.04);
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
    font-size: 0.85rem;
}

.canvas-content code {
    background: rgba(0, 0, 0, 0.04);
    border-radius: 4px;
    padding: 2px 5px;
    font-size: 0.9em;
}

.canvas-content pre code {
    background: none;
    padding: 0;
}

.canvas-content img {
    max-width: 100%;
    border-radius: 8px;
    margin: 8px 0;
}

.canvas-content ul,
.canvas-content ol {
    padding-left: 1.5em;
    margin: 0.5em 0;
}

.canvas-content blockquote {
    border-left: 3px solid var(--identity-accent);
    margin: 0.5em 0;
    padding: 4px 12px;
    color: var(--text-secondary);
    font-style: italic;
}

/* When canvas is open, shrink main content on desktop */
@media (min-width: 768px) {
    body.canvas-open .app-container {
        margin-right: 400px;
        transition: margin-right 0.3s ease;
    }
}

/* Mobile: full-screen overlay */
@media (max-width: 767px) {
    .canvas-panel {
        width: 100vw;
        border-left: none;
    }
}