:root {
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --green-500: #22c55e;
    --red-500: #ef4444;
    --blue-500: #3b82f6;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--white);
    color: var(--gray-800);
    min-height: 100vh;
    line-height: 1.5;
}

/* Header */
.header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;
}

.toggle-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-600);
    display: flex;
    align-items: center;
    gap: 6px;
}

.toggle-status {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gray-300);
    transition: background 0.2s;
}

.toggle-status.active { background: var(--green-500); }

.toggle-switch {
    position: relative;
    width: 44px;
    height: 24px;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background: var(--gray-200);
    border-radius: 12px;
    transition: all 0.2s;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: var(--white);
    border-radius: 50%;
    transition: all 0.2s;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.toggle-switch input:checked + .toggle-slider { background: var(--gray-800); }
.toggle-switch input:checked + .toggle-slider::before { transform: translateX(20px); }
.toggle-switch input:disabled + .toggle-slider { opacity: 0.4; cursor: not-allowed; }

.toggle-control.highlight {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    padding: 6px 12px;
    border-radius: 8px;
    margin: -6px 0;
}

.toggle-control.highlight .toggle-label {
    color: var(--gray-700);
    font-weight: 600;
}

.toggle-divider {
    width: 1px;
    height: 24px;
    background: var(--gray-200);
}

@media (max-width: 768px) {
    .header { padding: 12px; }
    .header-controls { gap: 12px; }
    .toggle-label { font-size: 13px; }
    .toggle-switch { width: 40px; height: 22px; }
    .toggle-slider::before { height: 16px; width: 16px; }
    .toggle-switch input:checked + .toggle-slider::before { transform: translateX(18px); }
    .toggle-divider { display: none; }
}

/* Main */
.main {
    max-width: 720px;
    margin: 0 auto;
    padding: 32px 24px 120px 24px;
}

/* Messages */
.messages-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 24px;
}

.message {
    display: flex;
    gap: 12px;
    animation: messageIn 0.3s ease-out;
    scroll-margin-top: 80px;
}

@keyframes messageIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 14px;
    background: var(--gray-100);
}

.message-avatar.error { background: #fef2f2; }
.message-avatar.success, .message-avatar.pose { background: #f0fdf4; }
.message-avatar.info { background: #eff6ff; }

.message-content {
    flex: 1;
    padding: 12px 16px;
    background: var(--gray-50);
    border: 1px solid var(--gray-100);
    border-radius: 12px;
    border-top-left-radius: 4px;
}

.message.error .message-content { background: #fef2f2; border-color: #fecaca; }
.message.success .message-content, .message.pose .message-content { background: #f0fdf4; border-color: #bbf7d0; }
.message.info .message-content { background: #eff6ff; border-color: #bfdbfe; }

.message-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 4px;
}

.message-title {
    font-size: 13px;
    font-weight: 600;
    color: var(--gray-700);
}

.message.error .message-title { color: var(--red-500); }
.message.success .message-title, .message.pose .message-title { color: var(--green-500); }
.message.info .message-title { color: var(--blue-500); }

.message-time { font-size: 11px; color: var(--gray-400); }
.message-text { font-size: 14px; color: var(--gray-600); line-height: 1.5; }

.message-dismiss {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 2px;
    margin-left: 8px;
    opacity: 0;
    transition: opacity 0.2s;
}

.message:hover .message-dismiss { opacity: 1; }
.message-dismiss:hover { color: var(--gray-600); }

/* Action Bar */
.action-bar { margin-top: 24px; margin-bottom: 100px; }

.action-buttons {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.action-buttons.hidden { display: none; }

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    background: var(--gray-50);
    border: 1px solid var(--gray-200);
    border-radius: 10px;
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: all 0.2s;
}

.action-btn:hover:not(:disabled) { background: var(--gray-100); border-color: var(--gray-300); }
.action-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.action-btn-stop {
    background: #fef2f2;
    border-color: #fecaca;
    color: var(--red-500);
    min-width: 120px;
}

.action-btn-stop:hover { background: #fee2e2; border-color: #fca5a5; }