/* Shared info panel — used by all sketch pages */

.info-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background: rgba(0, 0, 0, 0.78);
    backdrop-filter: blur(10px);
    border-left: 1px solid #1a1a2a;
    display: flex;
    flex-direction: column;
    z-index: 10;
    font-family: system-ui, sans-serif;
}

/* Language bar */
.panel-langs {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    padding: 14px 16px 12px;
    border-bottom: 1px solid #1a1a2a;
    flex-shrink: 0;
}

.panel-lang {
    background: none;
    border: 1px solid #2a2a3a;
    border-radius: 4px;
    color: #444;
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    padding: 3px 7px;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background 0.15s;
    font-family: system-ui, sans-serif;
}

.panel-lang:hover {
    color: #aaa;
    border-color: #555;
}

.panel-lang.active {
    color: var(--accent, #a855f7);
    border-color: var(--accent, #a855f7);
    background: rgba(255,255,255,0.03);
}

/* Scrollable content area */
.panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px 24px 40px;
    scrollbar-width: thin;
    scrollbar-color: #222 transparent;
}

.panel-body::-webkit-scrollbar { width: 4px; }
.panel-body::-webkit-scrollbar-track { background: transparent; }
.panel-body::-webkit-scrollbar-thumb { background: #222; border-radius: 2px; }

/* Content typography */
.panel-content h1 {
    font-size: 1.1rem;
    font-weight: 500;
    color: #eee;
    letter-spacing: 0.04em;
    margin-bottom: 5px;
}

.panel-subtitle {
    font-size: 0.67rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: #3a3a4a;
    margin-bottom: 26px;
}

.panel-content h2 {
    font-size: 0.67rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent, #a855f7);
    margin: 22px 0 8px;
}

.panel-content p {
    font-size: 0.82rem;
    line-height: 1.75;
    color: #666;
}

.panel-content ul {
    padding-left: 14px;
    margin: 0;
}

.panel-content li {
    font-size: 0.82rem;
    line-height: 1.75;
    color: #666;
    margin-bottom: 5px;
}

.panel-formula {
    margin: 14px 0;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 2px solid var(--accent, #a855f7);
    border-radius: 2px;
    font-family: 'Courier New', monospace;
    font-size: 0.88rem;
    color: var(--accent, #a855f7);
    opacity: 0.85;
    letter-spacing: 0.04em;
    line-height: 1.8;
}