/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-accent: #0f172a;
    --color-code-bg: #f8fafc;
    --color-code-border: #e2e8f0;
    --color-code-text: #334155;
    --color-green: #22c55e;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --border-radius: 8px;
    --max-width: 1200px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

.brand-safe {
    color: var(--color-green);
}

/* Hero section: Paste is black to match h1 */
.hero .brand-paste {
    color: var(--color-accent);
}

/* Footer section: Paste is white to match h3 */
.footer .brand-paste {
    color: white;
}

.beta-badge {
    font-size: 0.5em;
    font-weight: 600;
    vertical-align: super;
    margin-left: 0.15em;
    color: var(--color-text-light);
    opacity: 0.8;
}

.hero .beta-badge {
    color: var(--color-text-light);
}

.footer .beta-badge {
    color: #94a3b8;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-light);
}

li {
    margin-bottom: var(--spacing-xs);
}

code {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', 'Courier New', monospace;
    font-size: 0.9em;
    background-color: var(--color-code-bg);
    padding: 0.2em 0.4em;
    border-radius: 4px;
    color: var(--color-code-text);
    border: 1px solid var(--color-code-border);
}

/* Code Block with Copy Button */
.code-wrapper {
    position: relative;
    margin-bottom: var(--spacing-md);
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

pre {
    background-color: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    overflow-x: auto;
    margin-bottom: 0;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
    cursor: text;
}

pre code {
    background: none;
    padding: 0;
    border: none;
    font-size: 0.875rem;
    line-height: 1.6;
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
    cursor: text;
}

.copy-button {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background-color: var(--color-bg);
    border: 1px solid var(--color-code-border);
    border-radius: 6px;
    cursor: pointer;
    color: var(--color-text-light);
    transition: all 0.2s ease;
    opacity: 0;
    pointer-events: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    z-index: 10;
}

.code-wrapper:hover .copy-button {
    opacity: 1;
    pointer-events: auto;
}

.copy-button:hover {
    background-color: var(--color-code-bg);
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.copy-button:active {
    transform: scale(0.95);
}

.copy-button.copied {
    background-color: #10b981;
    border-color: #10b981;
    color: white;
    opacity: 1;
}

.copy-button.copied:hover {
    background-color: #059669;
    border-color: #059669;
}

.copy-icon,
.check-icon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.check-icon {
    stroke-width: 2.5;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

/* Hero Section */
.hero {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(to bottom, #fafafa 0%, #ffffff 100%);
    border-bottom: 1px solid var(--color-border);
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-logo {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--spacing-md);
    display: block;
    object-fit: contain;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-code-text);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: all 0.2s;
    border: 1px solid transparent;
}

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

.btn-primary:hover {
    background-color: #1e293b;
    opacity: 1;
}

.btn-secondary {
    background-color: var(--color-bg);
    color: var(--color-accent);
    border-color: var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-code-bg);
    opacity: 1;
}

/* Problem Section */
.problem {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.problem-list {
    margin-bottom: var(--spacing-md);
}

.warning {
    padding: var(--spacing-md);
    background-color: #fef3c7;
    border-left: 4px solid #f59e0b;
    border-radius: var(--border-radius);
    margin-top: var(--spacing-md);
}

.warning strong {
    color: #92400e;
}

/* Demo Section */
.demo {
    padding: var(--spacing-lg) 0;
    background-color: #fafafa;
    border-bottom: 1px solid var(--color-border);
}

.demo-description {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-size: 1.125rem;
}

.demo-image-wrapper {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.demo-screenshot {
    width: 100%;
    height: auto;
    display: block;
    border-radius: calc(var(--border-radius) - 2px);
}

/* Features Section */
.features {
    padding: var(--spacing-lg) 0;
    background-color: #fafafa;
    border-bottom: 1px solid var(--color-border);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.feature-card {
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
}

.feature-card p {
    margin-bottom: 0;
    font-size: 0.9375rem;
}

/* Entities Section */
.entities {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.section-intro {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.entities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.entity-category {
    padding: var(--spacing-md);
    background-color: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    border-radius: var(--border-radius);
}

.entity-category h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-code-border);
}

.entity-category ul {
    margin-left: var(--spacing-md);
    list-style-type: disc;
}

.entity-category li {
    font-size: 0.9375rem;
}

/* Usage Section */
.usage {
    padding: var(--spacing-lg) 0;
    background-color: #fafafa;
    border-bottom: 1px solid var(--color-border);
}

.usage-title {
    margin-top: var(--spacing-xl);
}

.usage-step {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
}

.usage-step h3 {
    margin-bottom: var(--spacing-md);
}

.usage-step ol,
.usage-step ul {
    margin-left: var(--spacing-md);
}

.shortcuts-table {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.shortcut-row {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--color-code-bg);
    border: 1px solid var(--color-code-border);
    border-radius: var(--border-radius);
}

.shortcut-keys {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.shortcut-keys code {
    background-color: var(--color-bg);
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.platform-label {
    color: var(--color-text);
    font-size: 0.875rem;
    font-weight: 500;
}

.shortcut-separator {
    color: var(--color-text-light);
    font-size: 0.875rem;
    margin: 0 var(--spacing-xs);
}

.shortcut-description {
    color: var(--color-text-light);
    font-size: 0.9375rem;
    margin-top: var(--spacing-xs);
}

.example-box {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
}

.example-item h4 {
    margin-bottom: var(--spacing-xs);
}

.example-item pre {
    margin-bottom: 0;
}

/* Security Section */
.security {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border);
}

.security-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.security-list h3 {
    margin-bottom: var(--spacing-md);
}

.security-list ul {
    list-style: none;
    margin-left: 0;
}

.security-list li {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border);
}

.security-list li:last-child {
    border-bottom: none;
}

/* Footer */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    background-color: var(--color-accent);
    color: #cbd5e1;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-section p {
    color: #94a3b8;
    font-size: 0.9375rem;
}

.footer-section ul {
    list-style: none;
    margin-left: 0;
}

.footer-section li {
    margin-bottom: var(--spacing-xs);
}

.footer-section a {
    color: #94a3b8;
}

.footer-section a:hover {
    color: white;
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid #334155;
}

.footer-bottom p {
    color: #94a3b8;
    margin: 0;
}

.footer-bottom .version-note {
    margin-top: var(--spacing-xs);
    font-size: 0.875rem;
    color: #94a3b8;
}

.footer-bottom .version-note strong {
    color: #cbd5e1;
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero-logo {
        width: 100px;
        height: 100px;
    }

    .hero-subtitle {
        font-size: 1.125rem;
    }

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

    .shortcut-keys {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .shortcut-separator {
        display: none;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Selection Color */
::selection {
    background-color: #3b82f6;
    color: white;
}

::-moz-selection {
    background-color: #3b82f6;
    color: white;
}

code::selection,
pre::selection {
    background-color: #3b82f6;
    color: white;
}

code::-moz-selection,
pre::-moz-selection {
    background-color: #3b82f6;
    color: white;
}