/* ========================================
   CSS Variables & Reset
   ======================================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1f;
    --bg-card: #16161a;
    --bg-card-hover: #1e1e24;
    
    --text-primary: #ffffff;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;
    
    --accent-primary: #3b82f6;
    --accent-secondary: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.3);
    
    --border-color: #27272a;
    --border-light: #3f3f46;
    
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--accent-glow);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

img, svg {
    display: block;
    max-width: 100%;
}

/* ========================================
   Utility Classes
   ======================================== */
.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), #a78bfa);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: var(--text-primary);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
}

.btn-ghost {
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-arrow {
    transition: transform var(--transition-base);
}

.btn-primary:hover .btn-arrow {
    transform: translateX(4px);
}

/* ========================================
   Navigation
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(10, 10, 11, 0.9);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.nav-logo {
    display: flex;
    align-items: center;
}

.nav-logo-img {
    height: 32px;
    width: auto;
    object-fit: contain;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-link {
    font-size: 0.875rem;
    color: var(--text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-base);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-base);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-lg) var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin-bottom: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-2xl);
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-lg);
}

.title-line {
    display: block;
    min-height: 1.1em;
}

.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 0.9em;
    background: var(--accent-primary);
    margin-left: 4px;
    vertical-align: text-bottom;
    animation: cursor-blink 0.8s infinite;
}

.typing-cursor.done {
    animation: cursor-blink 0.8s infinite;
    animation-delay: 2s;
    animation-iteration-count: 3;
    opacity: 0;
    transition: opacity 0.5s ease 2s;
}

@keyframes cursor-blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-color);
}

/* Hero Visual */
.hero-visual {
    width: 100%;
    max-width: 900px;
    position: relative;
    z-index: 1;
}

.app-preview {
    background: #1a1a2e;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    max-width: 1100px;
    margin: 0 auto;
}

/* ===== Top Bar ===== */
.app-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background: #12121f;
    border-bottom: 1px solid var(--border-color);
}

.mode-tabs {
    display: flex;
    gap: 4px;
}

.mode-tab {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.mode-tab:hover {
    background: rgba(255,255,255,0.06);
    color: var(--text-primary);
}

.mode-tab.active {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

.window-controls {
    display: flex;
    gap: 12px;
}

.win-btn {
    font-size: 0.85rem;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: color var(--transition-fast);
    line-height: 1;
}

.win-btn:hover {
    color: var(--text-primary);
}

.win-btn.close:hover {
    color: #ef4444;
}

/* ===== App Body ===== */
.app-body {
    display: flex;
    min-height: 480px;
}

.mode-panel {
    display: none;
    width: 100%;
}

.mode-panel.active {
    display: flex;
}

/* ===== Sidebar ===== */
.app-sidebar {
    width: 220px;
    background: #16162a;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.new-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin: 12px;
    padding: 10px 16px;
    background: #2563eb;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.new-chat-btn:hover {
    background: #1d4ed8;
}

.coder-new-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.coder-new-btn:hover {
    background: rgba(255,255,255,0.06);
    color: var(--text-primary);
}

.chat-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 8px;
}

.chat-list-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: 8px;
    font-size: 0.82rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-bottom: 2px;
}

.chat-list-item:hover {
    background: rgba(255,255,255,0.05);
}

.chat-list-item.active {
    background: rgba(255,255,255,0.08);
    color: var(--text-primary);
}

.chat-icon {
    font-size: 0.9rem;
    flex-shrink: 0;
}

.chat-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.chat-actions {
    display: none;
    gap: 4px;
    flex-shrink: 0;
}

.chat-list-item.active:hover .chat-actions {
    display: flex;
}

.chat-action-btn {
    font-size: 0.7rem;
    cursor: pointer;
    opacity: 0.6;
    transition: opacity var(--transition-fast);
}

.chat-action-btn:hover {
    opacity: 1;
}

.task-status {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
}

.task-status.pending {
    border: 2px solid var(--text-tertiary);
}

.task-status.done {
    border: 2px solid #22c55e;
    background: #22c55e;
}

.task-time {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px;
    border-top: 1px solid var(--border-color);
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

.avatar-img {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
}

.user-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ===== Chat Main ===== */
.chat-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.ai-disclaimer {
    text-align: center;
    font-size: 0.72rem;
    color: var(--text-tertiary);
    padding: 8px 0;
}

.chat-messages {
    flex: 1;
    padding: 16px 24px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.chat-msg {
    display: flex;
    flex-direction: column;
}

.user-msg {
    align-self: flex-end;
    align-items: flex-end;
}

.ai-msg {
    align-self: flex-start;
    align-items: flex-start;
    max-width: 85%;
}

.msg-bubble {
    padding: 12px 18px;
    border-radius: 12px;
    font-size: 0.88rem;
    line-height: 1.6;
}

.user-bubble {
    background: #3a3a4a;
    color: var(--text-primary);
}

.ai-bubble {
    background: transparent;
    color: var(--text-primary);
    padding-left: 0;
}

.ai-bubble p {
    margin-bottom: 8px;
}

.ai-bubble p:last-child {
    margin-bottom: 0;
}

.msg-time {
    font-size: 0.7rem;
    color: var(--text-tertiary);
    margin-top: 4px;
}

/* AI Thought */
.ai-thought {
    margin-bottom: 12px;
    padding-left: 0;
}

.thought-header {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    color: var(--text-tertiary);
    cursor: pointer;
    margin-bottom: 8px;
}

.thought-icon {
    font-size: 0.9rem;
}

.thought-arrow {
    font-size: 0.7rem;
}

.thought-content {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    padding-left: 16px;
    border-left: 2px solid var(--border-color);
    line-height: 1.5;
}

/* Message Actions */
.msg-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 8px;
    flex-wrap: wrap;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    font-size: 0.75rem;
    cursor: pointer;
    transition: color var(--transition-fast);
    font-family: var(--font-sans);
}

.action-btn:hover {
    color: var(--text-primary);
}

.model-badge {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    background: rgba(255,255,255,0.06);
    border-radius: 6px;
    font-size: 0.72rem;
    color: var(--text-tertiary);
}

/* ===== Input Area ===== */
.chat-input-area {
    margin: 0 24px 16px;
    background: #22223a;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 12px 14px;
}

.input-selectors {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.input-selector {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(255,255,255,0.06);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.input-selector:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-primary);
}

.selector-arrow {
    font-size: 0.6rem;
    margin-left: 2px;
}

.chat-input {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-primary);
    font-size: 0.88rem;
    padding: 4px 0;
    font-family: var(--font-sans);
}

.chat-input::placeholder {
    color: var(--text-tertiary);
}

.input-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 6px;
}

.input-left {
    display: flex;
    gap: 4px;
}

.input-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.input-icon-btn:hover {
    background: rgba(255,255,255,0.06);
    color: var(--text-primary);
}

.input-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-model {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--accent-primary);
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.send-btn:hover {
    background: #2563eb;
}

.stop-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: #ef4444;
    border: none;
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.stop-btn:hover {
    background: #dc2626;
}

/* ===== Coder Mode ===== */
.coder-body {
    flex: 1;
    display: flex;
    min-width: 0;
}

.coder-chat-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    border-right: 1px solid var(--border-color);
}

.coder-path-bar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255,255,255,0.03);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.78rem;
}

.path-icon {
    width: 14px;
    height: 14px;
    background: #2563eb;
    border-radius: 3px;
    flex-shrink: 0;
}

.path-text {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.change-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--accent-primary);
    font-size: 0.78rem;
    cursor: pointer;
    font-family: var(--font-sans);
}

.coder-messages {
    flex: 1;
}

/* Loading Dots */
.loading-dots {
    display: flex;
    gap: 6px;
    padding: 12px 0;
}

.loading-dots span {
    width: 10px;
    height: 10px;
    background: var(--text-tertiary);
    border-radius: 50%;
    animation: loadingPulse 1.4s infinite;
}

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

@keyframes loadingPulse {
    0%, 80%, 100% { opacity: 0.3; transform: scale(0.8); }
    40% { opacity: 1; transform: scale(1); }
}

/* ===== Terminal Panel ===== */
.terminal-panel {
    width: 340px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    background: #0d0d1a;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.04);
    border-bottom: 1px solid var(--border-color);
    font-size: 0.78rem;
    color: var(--text-secondary);
}

.terminal-icon {
    width: 12px;
    height: 12px;
    border: 1.5px solid var(--text-tertiary);
    border-radius: 2px;
}

.terminal-add {
    margin-left: auto;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-tertiary);
    transition: color var(--transition-fast);
}

.terminal-add:hover {
    color: var(--text-primary);
}

.terminal-content {
    flex: 1;
    padding: 12px 14px;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    line-height: 1.6;
    color: var(--text-secondary);
    overflow-y: auto;
}

.term-line {
    white-space: pre-wrap;
    word-break: break-all;
}

.term-line.prompt {
    color: var(--text-primary);
}

.cursor-blink-term {
    animation: termBlink 1s step-end infinite;
    color: var(--text-primary);
}

@keyframes termBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    animation: bounce 2s infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--text-tertiary);
    border-bottom: 2px solid var(--text-tertiary);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ========================================
   Section Headers
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-tag {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-sm);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.feature-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.feature-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* ========================================
   Agents Section
   ======================================== */
.agents {
    padding: var(--spacing-3xl) 0;
}

.agents-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.agent-showcase {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.agent-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.agent-card:hover,
.agent-card.active {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
}

.agent-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.agent-icon {
    font-size: 1.5rem;
}

.agent-info h4 {
    font-size: 1rem;
    font-weight: 600;
}

.agent-type {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.agent-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.agent-tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.tool-badge {
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-2xl);
    font-size: 0.75rem;
    color: var(--accent-secondary);
}

.agents-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Agent Demo */
.agent-demo {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    max-width: 420px;
    margin: 0 auto;
}

.demo-header {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.demo-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.demo-content {
    padding: var(--spacing-lg);
}

.config-item {
    margin-bottom: var(--spacing-md);
}

.config-item label {
    display: block;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.config-value {
    font-size: 0.875rem;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.config-input {
    width: 100%;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    outline: none;
    transition: border-color var(--transition-fast);
    box-sizing: border-box;
}

.config-input:focus {
    border-color: var(--accent-primary);
}

.config-input::placeholder {
    color: var(--text-tertiary);
}

.config-textarea {
    width: 100%;
    min-height: 80px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    outline: none;
    resize: vertical;
    font-family: var(--font-mono);
    transition: border-color var(--transition-fast);
    box-sizing: border-box;
}

.config-textarea:focus {
    border-color: var(--accent-primary);
}

.config-textarea::placeholder {
    color: var(--text-tertiary);
}

.tools-search {
    position: relative;
}

.tools-search .config-input {
    padding-right: 2rem;
}

.search-icon {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    pointer-events: none;
}

.tools-dropdown {
    margin-top: var(--spacing-xs);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.tool-option {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.tool-option:hover {
    background: var(--accent-primary);
    color: var(--text-primary);
}

.config-tools {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.config-tool {
    padding: 0.375rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.config-tool.active {
    background: var(--accent-primary);
    color: var(--text-primary);
}

.config-prompt {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

/* ========================================
   Models Section
   ======================================== */
.models {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.models-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.model-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.model-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-4px);
}

.model-card.custom-model {
    border-style: dashed;
}

.model-logo {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.model-icon-text {
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-primary);
}

.model-card.custom-model .model-icon-text {
    font-size: 2rem;
}

.model-name {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.model-provider {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.model-tags {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xs);
}

.model-tag {
    padding: 0.25rem 0.5rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    color: var(--text-secondary);
}

/* ========================================
   Tools Section
   ======================================== */
.tools {
    padding: var(--spacing-3xl) 0;
}

.tools-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

/* Terminal Demo */
.terminal-demo {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.terminal-dots {
    display: flex;
    gap: 6px;
}

.terminal-title {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.terminal-body {
    padding: var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.terminal-line {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.terminal-prompt {
    color: var(--accent-primary);
}

.terminal-command {
    color: var(--text-primary);
}

.terminal-output {
    padding-left: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.output-success {
    color: var(--success);
}

.terminal-cursor {
    width: 8px;
    height: 16px;
    background: var(--accent-primary);
    animation: blink 1s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Tool List */
.tool-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.tool-item {
    display: flex;
    gap: var(--spacing-md);
}

.tool-icon {
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--accent-primary);
}

.tool-icon svg {
    width: 24px;
    height: 24px;
}

.tool-info h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.tool-info p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   Security Section
   ======================================== */
.security {
    padding: var(--spacing-3xl) 0;
    background: var(--bg-secondary);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.security-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-base);
}

.security-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
    transform: translateY(-4px);
}

.security-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-primary);
}

.security-icon svg {
    width: 28px;
    height: 28px;
}

.security-card h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.security-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: var(--spacing-3xl) 0;
    background: 
        radial-gradient(ellipse at center, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-sm);
}

.cta-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.cta-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--border-color);
}

.footer-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.footer-logo-img {
    height: 80px;
    width: auto;
    object-fit: contain;
}

.footer-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.footer-social {
    display: flex;
    gap: var(--spacing-sm);
}

.social-link {
    width: 40px;
    height: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
}

.social-link:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h5 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-column a {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.footer-contact {
    color: var(--text-secondary);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .models-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .security-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .agents-layout,
    .tools-layout {
        grid-template-columns: 1fr;
    }
    
    .agents-visual {
        order: -1;
    }
    
    .agent-demo {
        max-width: 100%;
    }
    
    .app-preview {
        max-width: 100%;
    }
    
    .terminal-panel {
        width: 280px;
    }
    
    .footer-main {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding-top: var(--spacing-2xl);
    }
    
    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .stat-divider {
        width: 40px;
        height: 1px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .models-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .security-grid {
        grid-template-columns: 1fr;
    }
    
    .app-sidebar {
        display: none;
    }
    
    .chat-msg {
        max-width: 100%;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .models-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
    }
    
    .cta-actions .btn {
        width: 100%;
    }
}

/* ========================================
   Animations
   ======================================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for grid items */
.features-grid .feature-card:nth-child(1) { transition-delay: 0.1s; }
.features-grid .feature-card:nth-child(2) { transition-delay: 0.2s; }
.features-grid .feature-card:nth-child(3) { transition-delay: 0.3s; }
.features-grid .feature-card:nth-child(4) { transition-delay: 0.4s; }
.features-grid .feature-card:nth-child(5) { transition-delay: 0.5s; }
.features-grid .feature-card:nth-child(6) { transition-delay: 0.6s; }

.models-grid .model-card:nth-child(1) { transition-delay: 0.05s; }
.models-grid .model-card:nth-child(2) { transition-delay: 0.1s; }
.models-grid .model-card:nth-child(3) { transition-delay: 0.15s; }
.models-grid .model-card:nth-child(4) { transition-delay: 0.2s; }
.models-grid .model-card:nth-child(5) { transition-delay: 0.25s; }
.models-grid .model-card:nth-child(6) { transition-delay: 0.3s; }
.models-grid .model-card:nth-child(7) { transition-delay: 0.35s; }

.security-grid .security-card:nth-child(1) { transition-delay: 0.1s; }
.security-grid .security-card:nth-child(2) { transition-delay: 0.2s; }
.security-grid .security-card:nth-child(3) { transition-delay: 0.3s; }
.security-grid .security-card:nth-child(4) { transition-delay: 0.4s; }