/* Synapse V8 — Liquid Glass UI */

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-tertiary: #1a1a2e;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(99, 102, 241, 0.3);
    --text-primary: #f0f0f5;
    --text-secondary: #a0a0b8;
    --text-muted: #606080;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1, #8b5cf6, #a855f7);
    --accent-glow: rgba(99, 102, 241, 0.15);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --blur-amount: 20px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
    --sidebar-width: 280px;
    --header-height: 60px;
}

[data-theme="light"] {
    --bg-primary: #f8f9fc;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f0f1f5;
    --bg-glass: rgba(255, 255, 255, 0.7);
    --bg-glass-hover: rgba(255, 255, 255, 0.85);
    --border-glass: rgba(0, 0, 0, 0.08);
    --border-accent: rgba(99, 102, 241, 0.3);
    --text-primary: #1a1a2e;
    --text-secondary: #555570;
    --text-muted: #9090a8;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* === LAYOUT === */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* === SIDEBAR === */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-glass);
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal);
    z-index: 100;
    backdrop-filter: blur(var(--blur-amount));
}

.sidebar.collapsed {
    transform: translateX(-100%);
    position: absolute;
}

.sidebar-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    color: white;
}

.sidebar-title {
    font-size: 16px;
    font-weight: 600;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.new-chat-btn {
    margin: 12px 16px;
    padding: 10px 16px;
    border: 1px dashed var(--border-accent);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    color: var(--accent-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.new-chat-btn:hover {
    background: var(--accent-glow);
    border-color: var(--accent-primary);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.chat-list::-webkit-scrollbar {
    width: 4px;
}

.chat-list::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 4px;
}

.chat-item {
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-item:hover {
    background: var(--bg-glass-hover);
}

.chat-item.active {
    background: var(--accent-glow);
    border: 1px solid var(--border-accent);
}

.chat-item-title {
    font-size: 13px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-item-icon {
    font-size: 14px;
    opacity: 0.5;
}

/* === MAIN CONTENT === */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* === HEADER === */
.header {
    height: var(--header-height);
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    padding: 0 20px;
    gap: 16px;
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-amount));
}

.menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.menu-btn:hover {
    background: var(--bg-glass-hover);
}

.header-title {
    font-size: 15px;
    font-weight: 600;
}

.header-actions {
    margin-left: auto;
    display: flex;
    gap: 8px;
    align-items: center;
}

.header-btn {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.header-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.mode-selector {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 4px;
    display: flex;
    gap: 2px;
}

.mode-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.mode-btn.active {
    background: var(--accent-primary);
    color: white;
}

.mode-btn:hover:not(.active) {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

/* === CHAT AREA === */
.chat-area {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    scroll-behavior: smooth;
}

.chat-area::-webkit-scrollbar {
    width: 6px;
}

.chat-area::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 4px;
}

.message {
    max-width: 800px;
    margin: 0 auto 16px;
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.message-bubble {
    padding: 16px 20px;
    border-radius: var(--radius-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    backdrop-filter: blur(10px);
    line-height: 1.6;
    font-size: 14px;
}

.message.user .message-bubble {
    background: var(--accent-primary);
    color: white;
    border-color: transparent;
    border-bottom-right-radius: 4px;
    margin-left: auto;
    max-width: 70%;
}

.message.assistant .message-bubble {
    background: var(--bg-glass);
    border-bottom-left-radius: 4px;
}

.message.system .message-bubble {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.2);
    font-size: 13px;
    text-align: center;
}

.message-avatar {
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    margin-bottom: 6px;
}

.message.assistant .message-avatar {
    background: var(--accent-gradient);
    color: white;
}

.message-meta {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* === THINKING ANIMATION === */
.thinking-indicator {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    max-width: 800px;
    margin: 0 auto 16px;
}

.thinking-dots {
    display: flex;
    gap: 4px;
}

.thinking-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-primary);
    animation: thinking 1.4s infinite ease-in-out;
}

.thinking-dots span:nth-child(1) { animation-delay: 0s; }
.thinking-dots span:nth-child(2) { animation-delay: 0.2s; }
.thinking-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes thinking {
    0%, 80%, 100% { transform: scale(0.6); opacity: 0.3; }
    40% { transform: scale(1); opacity: 1; }
}

.thinking-text {
    font-size: 13px;
    color: var(--text-muted);
}

/* === INPUT AREA === */
.input-area {
    padding: 16px 20px 20px;
    border-top: 1px solid var(--border-glass);
    background: var(--bg-glass);
    backdrop-filter: blur(var(--blur-amount));
}

.input-container {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    gap: 8px;
    align-items: flex-end;
}

.input-wrapper {
    flex: 1;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 12px 16px;
    display: flex;
    align-items: flex-end;
    gap: 8px;
    transition: border-color var(--transition-fast);
}

.input-wrapper:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.input-wrapper textarea {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    font-family: inherit;
    resize: none;
    outline: none;
    line-height: 1.5;
    max-height: 150px;
    min-height: 20px;
}

.input-wrapper textarea::placeholder {
    color: var(--text-muted);
}

.input-actions {
    display: flex;
    gap: 4px;
    align-items: center;
}

.input-action-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    padding: 4px 6px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: all var(--transition-fast);
}

.input-action-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.send-btn {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    background: var(--accent-gradient);
    border: none;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px var(--accent-glow);
}

.send-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* === WELCOME SCREEN === */
.welcome-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    padding: 40px 20px;
}

.welcome-logo {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-xl);
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 24px;
    box-shadow: 0 0 60px var(--accent-glow);
    animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { box-shadow: 0 0 60px var(--accent-glow); }
    50% { box-shadow: 0 0 80px rgba(99, 102, 241, 0.3); }
}

.welcome-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.welcome-subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.quick-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    max-width: 600px;
    width: 100%;
}

.quick-action {
    padding: 16px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: left;
}

.quick-action:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
}

.quick-action-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.quick-action-title {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.quick-action-desc {
    font-size: 12px;
    color: var(--text-muted);
}

/* === SETTINGS PANEL === */
.settings-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-glass);
    backdrop-filter: blur(var(--blur-amount));
    transition: right var(--transition-normal);
    z-index: 200;
    display: flex;
    flex-direction: column;
}

.settings-panel.open {
    right: 0;
}

.settings-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.settings-title {
    font-size: 16px;
    font-weight: 600;
}

.settings-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 20px;
    cursor: pointer;
}

.settings-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.setting-group {
    margin-bottom: 24px;
}

.setting-group-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.setting-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-glass);
}

.setting-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.setting-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

select, input[type="range"], input[type="text"] {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    color: var(--text-primary);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 13px;
    outline: none;
}

select:focus, input:focus {
    border-color: var(--accent-primary);
}

.toggle {
    width: 40px;
    height: 22px;
    border-radius: 11px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    position: relative;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toggle.active {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.toggle::after {
    content: '';
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: white;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform var(--transition-fast);
}

.toggle.active::after {
    transform: translateX(18px);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .menu-btn {
        display: flex;
    }

    .quick-actions {
        grid-template-columns: 1fr;
    }

    .settings-panel {
        width: 100%;
        right: -100%;
    }

    .message.user .message-bubble {
        max-width: 90%;
    }
}

/* === SCROLLBAR === */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-glass);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* === CODE BLOCKS === */
pre {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 12px;
    overflow-x: auto;
    margin: 8px 0;
    font-size: 13px;
}

code {
    font-family: 'SF Mono', 'Fira Code', 'JetBrains Mono', monospace;
    font-size: 13px;
}

.inline-code {
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 12px;
}

/* === PROGRESS BAR === */
.progress-bar {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    overflow: hidden;
    margin: 8px 0;
}

.progress-fill {
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

/* === FILE UPLOAD === */
.file-upload-zone {
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius-md);
    padding: 24px;
    text-align: center;
    color: var(--text-muted);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.file-upload-zone:hover,
.file-upload-zone.dragover {
    border-color: var(--accent-primary);
    background: var(--accent-glow);
}

/* === OVERLAY === */
.overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.overlay.active {
    display: block;
}