/* ========================================
   CSS Variables & Design Tokens
======================================== */
:root {
    /* Background Colors */
    --bg-primary: #09090b;
    --bg-secondary: #0f0f12;
    --bg-tertiary: #18181b;
    --bg-elevated: #1f1f23;
    --bg-hover: #27272a;
    --bg-active: #3f3f46;

    /* Text Colors */
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-disabled: #52525b;

    /* Border Colors */
    --border-default: #27272a;
    --border-light: #3f3f46;
    --border-focus: #3b82f6;

    /* Accent Colors */
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-muted: rgba(59, 130, 246, 0.15);
    --accent-glow: rgba(59, 130, 246, 0.4);

    /* Status Colors */
    --success: #22c55e;
    --success-muted: rgba(34, 197, 94, 0.15);
    --warning: #f59e0b;
    --warning-muted: rgba(245, 158, 11, 0.15);
    --error: #ef4444;
    --error-muted: rgba(239, 68, 68, 0.15);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.5rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px var(--accent-glow);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   Reset & Base Styles
======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

html, body {
    height: 100%;
    font-family: var(--font-sans);
    font-size: 16px;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

#app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

::selection {
    background: var(--accent);
    color: white;
}

/* ========================================
   Utilities
======================================== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========================================
   Buttons
======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    font-weight: 500;
    line-height: 1.5;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border-color: var(--border-default);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-light);
}

.btn-icon {
    padding: var(--space-2);
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: var(--radius-md);
}

.btn-icon:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: var(--space-3) var(--space-6);
    font-size: var(--font-size-base);
    border-radius: var(--radius-lg);
}

.btn-full {
    width: 100%;
}

.btn-spinner {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ========================================
   Form Elements
======================================== */
.form-group {
    margin-bottom: var(--space-4);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group .optional {
    font-weight: 400;
    color: var(--text-muted);
}

.input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-wrapper svg {
    position: absolute;
    left: var(--space-3);
    color: var(--text-muted);
    pointer-events: none;
}

.input-wrapper input {
    padding-left: 42px;
}

input[type="text"],
input[type="email"],
input[type="password"] {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    outline: none;
    transition: all var(--transition-fast);
}

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

input:hover:not(:focus) {
    border-color: var(--border-light);
}

input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-muted);
}

/* ========================================
   Landing Screen
======================================== */
.landing-screen {
    min-height: 100%;
    position: relative;
    overflow: hidden;
}

.landing-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.grid-pattern {
    position: absolute;
    inset: 0;
    background-image: 
        linear-gradient(var(--border-default) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-default) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

.glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.glow-1 {
    width: 600px;
    height: 600px;
    background: var(--accent);
    top: -200px;
    right: -100px;
}

.glow-2 {
    width: 400px;
    height: 400px;
    background: #8b5cf6;
    bottom: -100px;
    left: -100px;
}

/* Navigation */
.landing-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-8);
    position: relative;
    z-index: 10;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.brand-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-muted);
    color: var(--accent);
    border-radius: var(--radius-lg);
}

.brand-name {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-6);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.nav-btn {
    padding: var(--space-2) var(--space-4) !important;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
}

.nav-btn:hover {
    background: var(--bg-hover) !important;
    border-color: var(--border-light);
}

/* Hero Section */
.landing-hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-16);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-12) var(--space-8) var(--space-20);
    position: relative;
    z-index: 10;
}

.hero-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--accent-muted);
    color: var(--accent);
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    width: fit-content;
    margin-bottom: var(--space-6);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-6);
    letter-spacing: -0.02em;
}

.hero-gradient {
    background: linear-gradient(135deg, var(--accent), #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: var(--space-4);
    margin-bottom: var(--space-16);
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
}

.feature-card {
    padding: var(--space-6);
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.feature-card:hover {
    border-color: var(--border-light);
    transform: translateY(-2px);
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    color: var(--accent);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-4);
}

.feature-card h3 {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.feature-card p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Hero Preview */
.hero-preview {
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-window {
    width: 100%;
    max-width: 560px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.preview-header {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-default);
}

.preview-dots {
    display: flex;
    gap: var(--space-2);
}

.preview-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bg-active);
}

.preview-dots span:nth-child(1) { background: #ef4444; }
.preview-dots span:nth-child(2) { background: #f59e0b; }
.preview-dots span:nth-child(3) { background: #22c55e; }

.preview-title {
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
}

.preview-users {
    display: flex;
}

.preview-avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    color: white;
    margin-left: -6px;
    border: 2px solid var(--bg-tertiary);
}

.preview-avatar:first-child {
    margin-left: 0;
}

.preview-content {
    display: flex;
    padding: var(--space-4);
    min-height: 240px;
}

.preview-line-numbers {
    display: flex;
    flex-direction: column;
    padding-right: var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    line-height: 1.8;
    text-align: right;
    user-select: none;
}

.preview-code {
    flex: 1;
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.8;
}

.preview-line {
    display: flex;
    align-items: center;
    position: relative;
}

.preview-line .comment {
    color: var(--text-muted);
}

.preview-line .keyword {
    color: var(--accent);
}

.cursor {
    width: 2px;
    height: 18px;
    margin-left: 2px;
    animation: blink 1s infinite;
}

.cursor-blue { background: #3b82f6; }
.cursor-green { background: #22c55e; }
.cursor-orange { background: #f59e0b; }

.cursor.typing {
    animation: typing 0.5s infinite;
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

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

.preview-status {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) var(--space-4);
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-default);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.status-connected {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--success);
}

.status-connected .dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--success);
}

/* Recent Section */
.recent-section {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-8) var(--space-12);
    position: relative;
    z-index: 10;
}

.recent-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-4);
}

.recent-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.recent-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-4);
}

.recent-item {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.recent-item:hover {
    border-color: var(--border-light);
    background: var(--bg-tertiary);
}

.recent-item-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-muted);
    color: var(--accent);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.recent-item-info {
    flex: 1;
    min-width: 0;
}

.recent-item-title {
    font-size: var(--font-size-sm);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: var(--space-1);
}

.recent-item-meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

/* ========================================
   Modal
======================================== */
.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    padding: var(--space-4);
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.modal-content {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    width: 100%;
    max-width: 420px;
    box-shadow: var(--shadow-lg);
    animation: modalEnter 0.2s ease-out;
}

.modal-sm {
    max-width: 380px;
    padding: var(--space-6);
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    padding: var(--space-2);
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.modal-header {
    text-align: center;
    margin-bottom: var(--space-6);
}

.modal-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-muted);
    color: var(--accent);
    border-radius: var(--radius-xl);
    margin: 0 auto var(--space-4);
}

.share-icon {
    background: var(--success-muted);
    color: var(--success);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
}

.modal-header p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.modal-divider {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin: var(--space-6) 0;
}

.modal-divider::before,
.modal-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-default);
}

.modal-divider span {
    font-size: var(--font-size-sm);
    color: var(--text-muted);
}

/* Share Modal */
.share-content {
    margin-top: var(--space-4);
}

.share-link-wrapper {
    display: flex;
    gap: var(--space-2);
}

.share-link {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--font-size-xs);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

/* ========================================
   Editor Container
======================================== */
.editor-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

/* Editor Header */
.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-default);
    flex-shrink: 0;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.header-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.doc-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.doc-title-input {
    padding: var(--space-1) var(--space-2);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    outline: none;
    transition: all var(--transition-fast);
    max-width: 250px;
}

.doc-title-input:hover {
    background: var(--bg-tertiary);
}

.doc-title-input:focus {
    background: var(--bg-tertiary);
    border-color: var(--accent);
}

.doc-meta {
    padding-left: var(--space-2);
}

.doc-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--text-muted);
}

.status-dot.connected {
    background: var(--success);
}

.status-dot.connecting {
    background: var(--warning);
    animation: pulse 1s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.toolbar-btn.active {
    background: var(--accent-muted);
    color: var(--accent);
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border-default);
    margin: 0 var(--space-2);
}

/* Users List */
.users-list {
    display: flex;
    align-items: center;
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: white;
    margin-left: -8px;
    border: 2px solid var(--bg-secondary);
    position: relative;
    cursor: default;
    transition: all var(--transition-fast);
}

.user-avatar:first-child {
    margin-left: 0;
}

.user-avatar:hover {
    transform: scale(1.1);
    z-index: 10;
}

.user-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--space-1) var(--space-2);
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    z-index: 20;
}

.user-avatar:hover .user-tooltip {
    opacity: 1;
    visibility: visible;
}

/* Editor Main Area */
.editor-main {
    flex: 1;
    overflow: hidden;
    display: flex;
    background: var(--bg-primary);
}

.editor-scroll {
    flex: 1;
    overflow: auto;
}

.editor-wrapper {
    display: flex;
    min-height: 100%;
    padding: var(--space-6);
    max-width: 1000px;
    margin: 0 auto;
}

.line-numbers {
    width: 50px;
    padding-right: var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--text-muted);
    text-align: right;
    user-select: none;
    flex-shrink: 0;
}

.line-number {
    height: 24px;
}

.editor-content {
    flex: 1;
    position: relative;
    min-height: 100%;
}

.cursors-layer {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.remote-cursor {
    position: absolute;
    width: 2px;
    animation: cursorBlink 1s infinite;
}

.remote-cursor-label {
    position: absolute;
    top: -20px;
    left: 0;
    padding: 2px 6px;
    font-size: 10px;
    font-weight: 600;
    color: white;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.remote-selection {
    position: absolute;
    opacity: 0.25;
    pointer-events: none;
}

.editor {
    width: 100%;
    min-height: 100%;
    padding: 0 var(--space-4);
    font-family: var(--font-mono);
    font-size: var(--font-size-sm);
    line-height: 1.7;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
    resize: none;
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow: hidden;
}

.editor::placeholder {
    color: var(--text-muted);
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-4);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-default);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
    flex-shrink: 0;
}

.status-left,
.status-right {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.status-separator {
    width: 1px;
    height: 12px;
    background: var(--border-default);
}

.last-saved {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.connection-status {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--error);
}

.connection-status.connected .status-indicator {
    background: var(--success);
}

.connection-status.connecting .status-indicator {
    background: var(--warning);
    animation: pulse 1s infinite;
}

/* ========================================
   Toast Notifications
======================================== */
.toast-container {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    flex-direction: column-reverse;
    gap: var(--space-3);
    z-index: 200;
    max-width: 380px;
}

.toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: toastEnter 0.3s ease-out;
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateY(10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.toast.removing {
    animation: toastExit 0.2s ease-in forwards;
}

@keyframes toastExit {
    to {
        opacity: 0;
        transform: translateX(20px);
    }
}

.toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
}

.toast-success .toast-icon { color: var(--success); }
.toast-error .toast-icon { color: var(--error); }
.toast-info .toast-icon { color: var(--accent); }

.toast-content {
    flex: 1;
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    line-height: 1.5;
}

/* ========================================
   Responsive Design
======================================== */
@media (max-width: 1024px) {
    .landing-hero {
        grid-template-columns: 1fr;
        gap: var(--space-12);
        padding: var(--space-8) var(--space-6);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-preview {
        order: -1;
    }

    .preview-window {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .landing-nav {
        padding: var(--space-4);
    }

    .nav-links a:not(.nav-btn) {
        display: none;
    }

    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .hero-actions {
        flex-direction: column;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .editor-header {
        flex-wrap: wrap;
    }

    .header-center {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        margin-top: var(--space-3);
    }

    .toolbar {
        width: 100%;
        justify-content: center;
    }

    .editor-wrapper {
        padding: var(--space-4);
    }

    .line-numbers {
        display: none;
    }

    .status-bar {
        flex-wrap: wrap;
        gap: var(--space-2);
    }

    .status-separator {
        display: none;
    }

    .modal-content {
        padding: var(--space-6);
    }
}

@media (max-width: 480px) {
    .hero-subtitle {
        font-size: var(--font-size-base);
    }

    .preview-window {
        display: none;
    }

    .recent-list {
        grid-template-columns: 1fr;
    }

    .toast-container {
        left: var(--space-4);
        right: var(--space-4);
        max-width: none;
    }
}