/* Layout — Sidebar + Content */

.app-shell {
    display: flex;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Matrix rain background */
.app-shell::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(255,50,80,0.03) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(255,50,80,0.02) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
    position: relative;
}

.sidebar-brand {
    padding: 18px 16px;
    border-bottom: 1px solid var(--border);
}
.sidebar-brand .brand-icon {
    font-size: 0.7rem;
    color: var(--cyan);
    letter-spacing: 1px;
}
.sidebar-brand .brand-name {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 2px;
}

.sidebar-nav {
    list-style: none;
    padding: 12px 8px;
    flex: 1;
}
.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    transition: all 0.15s;
    cursor: pointer;
    text-transform: uppercase;
}
.sidebar-nav li a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}
.sidebar-nav li a.active {
    background: var(--cyan-dim);
    color: var(--cyan);
    border-left: 2px solid var(--cyan);
}
.sidebar-nav li a .nav-icon {
    width: 18px;
    text-align: center;
    font-size: 0.85rem;
}

.sidebar-footer {
    padding: 12px 16px;
    border-top: 1px solid var(--border);
    font-size: 0.75rem;
}
.sidebar-footer .status-line {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--green);
    margin-bottom: 8px;
}
.sidebar-footer .status-dot {
    width: 6px; height: 6px;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--green);
}
.sidebar-footer .support-btn {
    display: block;
    width: 100%;
    padding: 8px;
    background: var(--cyan-dim);
    border: 1px solid var(--cyan);
    border-radius: var(--radius);
    color: var(--cyan);
    font-family: var(--font);
    font-size: 0.75rem;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    margin-bottom: 8px;
    letter-spacing: 1px;
}
.sidebar-footer .disconnect {
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.75rem;
}
.sidebar-footer .disconnect:hover { color: var(--red); }

/* Main area */
.main-area {
    flex: 1;
    overflow-y: auto;
    padding: 24px 28px;
    position: relative;
    z-index: 1;
}

/* Page header */
.page-title {
    font-size: 1.1rem;
    color: var(--cyan);
    letter-spacing: 1px;
    margin-bottom: 20px;
}
.page-title span { color: var(--text-muted); }

/* Section headers — // PREFIX style */
.section-header {
    font-size: 0.8rem;
    color: var(--cyan);
    letter-spacing: 1px;
    margin-bottom: 12px;
    margin-top: 24px;
}

/* Grid */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 12px; }

/* Login */
.login-shell {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: var(--bg-primary);
}