* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.app-shell {
    display: grid;
    grid-template-columns: 320px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: #111827;
    border-right: 1px solid rgba(255,255,255,0.08);
    padding: 24px;
}

.brand h1 {
    margin: 0 0 6px;
    font-size: 24px;
}

.brand p {
    margin: 0 0 24px;
    color: #9ca3af;
}

.controls {
    display: grid;
    gap: 10px;
    margin-bottom: 20px;
}

.selectors,
.status-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 18px;
    padding: 16px;
    margin-bottom: 16px;
}

.selectors label {
    display: block;
    margin-bottom: 8px;
}

.selectors select {
    width: 100%;
    padding: 12px;
    border-radius: 12px;
    border: none;
    background: #1f2937;
    color: white;
}

.btn {
    border: none;
    border-radius: 14px;
    padding: 12px 16px;
    font-weight: 700;
    cursor: pointer;
}

.btn.primary {
    background: #2563eb;
    color: white;
}

.btn.secondary {
    background: #374151;
    color: white;
}

.btn.danger {
    background: #dc2626;
    color: white;
}

.main-panel {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    background: #0b1220;
}

.chat-box {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.msg {
    max-width: 78%;
    padding: 14px 16px;
    border-radius: 18px;
    line-height: 1.5;
    white-space: pre-wrap;
}

.msg.user {
    align-self: flex-end;
    background: #2563eb;
    color: white;
}

.msg.assistant {
    align-self: flex-start;
    background: #1f2937;
    color: #f3f4f6;
}

.msg.system {
    align-self: center;
    background: #334155;
    color: #e2e8f0;
}

.composer {
    display: flex;
    gap: 12px;
    padding: 20px 24px;
    border-top: 1px solid rgba(255,255,255,0.08);
    background: #0b1220;
}

.composer input {
    flex: 1;
    padding: 14px 16px;
    border-radius: 14px;
    border: 1px solid rgba(255,255,255,0.08);
    background: #111827;
    color: white;
}

.badge {
    padding: 8px 12px;
    border-radius: 999px;
    background: #374151;
}

.badge.live {
    background: #166534;
}