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

:root {
    /* Spacing System (8px base) */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-5: 40px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --space-12: 96px;
    --space-16: 128px;

    /* Colors - Dark Theme */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #171717;
    --bg-elevated: #262626;

    --text-primary: #ededed;
    --text-secondary: #a1a1aa;
    --text-tertiary: #71717a;

    --accent-primary: #ffffff;
    --accent-hover: #d4d4d4;
    --accent-light: #e5e5e5;

    --border-subtle: #262626;
    --border-medium: #404040;
    --shadow-glow: 0 0 24px rgba(255, 255, 255, 0.1);

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(59, 130, 246, 0.2);

    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', 'Monaco', monospace;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.nav-brand svg {
    color: var(--accent-primary);
    width: 24px;
    height: 24px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-links a:not(.btn-primary):hover {
    color: var(--text-primary);
}

.nav-links a:not(.btn-primary)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.nav-links a:not(.btn-primary):hover::after {
    transform: scaleX(1);
}

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: var(--accent-primary);
    color: #000000 !important;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-medium);
    cursor: pointer;
    transition: all var(--transition-base);
}

.btn-secondary:hover {
    background: var(--bg-elevated);
    border-color: var(--border-medium);
    transform: translateY(-2px);
}

.btn-secondary:active {
    transform: translateY(0);
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

/* Hero Section */
.hero {
    padding-top: 120px;
    padding-bottom: var(--space-16);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: center;
}

.hero-content {
    max-width: 100%;
}

.hero-title {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-3);
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero-subtitle {
    font-size: 20px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: var(--space-5);
    max-width: 100%;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.hero-cta {
    display: flex;
    gap: var(--space-2);
    margin-bottom: 0;
}

/* Code Preview */
.code-preview {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.code-preview-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-subtle);
}

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

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

.code-preview-dots span:nth-child(1) {
    background: #ef4444;
}

.code-preview-dots span:nth-child(2) {
    background: #f59e0b;
}

.code-preview-dots span:nth-child(3) {
    background: #10b981;
}

.code-preview-title {
    font-size: 13px;
    color: var(--text-secondary);
    font-family: var(--font-mono);
}

.code-preview-content {
    padding: var(--space-3);
    overflow-x: auto;
}

.code-preview-content pre {
    margin: 0;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-primary);
}

.code-preview-content code {
    font-family: inherit;
}

/* Code Syntax Highlighting */
.code-keyword {
    color: #c678dd;
}

.code-function {
    color: #61afef;
}

.code-param {
    color: #e06c75;
}

.code-number {
    color: #d19a66;
}

.code-string {
    color: #98c379;
}

/* Section Styles */
section {
    padding: var(--space-16) 0;
}

.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
}

.section-title {
    font-size: 40px;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-8);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

/* Features Section */
.features {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
}

.feature-card {
    flex: 1 1 280px;
    max-width: 400px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: var(--space-4);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-medium);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
}

.feature-icon svg {
    color: var(--accent-primary);
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--text-primary);
}

.feature-card p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
}

/* How It Works Section */
.steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    min-width: 180px;
    text-align: center;
}

.step-number {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-primary);
    color: #000000;
    font-size: 24px;
    font-weight: 700;
    border-radius: 50%;
    margin: 0 auto var(--space-2);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

.step-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--text-primary);
}

.step-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.step-arrow {
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.step-arrow svg {
    width: 24px;
    height: 24px;
}

/* Use Cases Section */
.use-cases {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.use-cases-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-4);
    max-width: 900px;
    margin: 0 auto;
}

.use-case {
    flex: 1 1 260px;
    max-width: 400px;
    text-align: center;
    padding: var(--space-3);
}

.use-case svg {
    width: 32px;
    height: 32px;
    color: var(--accent-primary);
    margin-bottom: var(--space-2);
}

.use-case h3 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: var(--space-1);
    color: var(--text-primary);
}

.use-case p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    text-align: center;
    padding: var(--space-16) 0;
    position: relative;
    overflow: hidden;
}

.cta::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.05) 0%, transparent 70%);
    pointer-events: none;
}

.cta-container {
    max-width: 600px;
    margin: 0 auto;
    padding: 0 var(--space-3);
    position: relative;
    z-index: 1;
}

.cta h2 {
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--space-2);
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

.cta p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: var(--space-4);
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: var(--space-6) 0;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.footer-info p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: var(--space-1);
}

.footer-info strong {
    color: var(--text-primary);
    font-weight: 600;
}

.heart {
    color: #ef4444;
}

.footer-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color var(--transition-fast);
}

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

.footer-links svg {
    width: 20px;
    height: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --space-2: 20px;
        --space-3: 20px;
        --space-4: 28px;
        --space-6: 40px;
        --space-8: 56px;
        --space-10: 64px;
        --space-16: 80px;
    }

    .nav-container {
        padding: 0 20px;
    }

    .nav-brand {
        font-size: 16px;
    }

    .nav-links {
        gap: var(--space-2);
    }

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

    .hero {
        padding-top: 88px;
        padding-bottom: var(--space-10);
    }

    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--space-6);
        padding: 0 20px;
    }

    .hero-title {
        font-size: 32px;
        line-height: 1.15;
        margin-bottom: var(--space-2);
    }

    .hero-subtitle {
        font-size: 16px;
        margin-bottom: var(--space-4);
    }

    .hero-cta {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2);
        margin-bottom: var(--space-6);
    }

    .btn-large {
        width: 100%;
        padding: 12px 24px;
        font-size: 15px;
    }

    .section-container {
        padding: 0 20px;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: var(--space-6);
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .feature-card {
        padding: var(--space-3);
    }

    .steps {
        flex-direction: column;
        gap: var(--space-3);
    }

    .step {
        min-width: auto;
    }

    .step-arrow {
        transform: rotate(90deg);
        margin: var(--space-1) 0;
    }

    .use-cases-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2);
    }

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

    .code-preview-content {
        overflow-x: auto;
        padding: var(--space-2);
    }

    .code-preview-content pre {
        font-size: 13px;
    }
}

/* Extra small devices (360px and below) */
@media (max-width: 400px) {
    .nav-container {
        padding: 0 20px;
        height: 56px;
    }

    .nav-brand {
        font-size: 15px;
        gap: 8px;
    }

    .nav-brand svg {
        width: 20px;
        height: 20px;
    }

    .btn-primary {
        padding: 8px 16px;
        font-size: 14px;
    }

    .hero {
        padding-top: 80px;
        padding-bottom: var(--space-8);
    }

    .hero-container {
        padding: 0 var(--space-2);
        gap: var(--space-5);
    }

    .hero-title {
        font-size: 26px;
        line-height: 1.25;
        margin-bottom: var(--space-2);
    }

    .title-break {
        display: none;
    }

    .hero-subtitle {
        font-size: 15px;
        line-height: 1.5;
        margin-bottom: var(--space-3);
    }

    .hero-cta {
        gap: 12px;
        margin-bottom: var(--space-5);
    }

    .btn-large {
        padding: 11px 20px;
        font-size: 14px;
    }

    section {
        padding: var(--space-10) 0;
    }

    .section-container {
        padding: 0 var(--space-2);
    }

    .section-title {
        font-size: 24px;
        margin-bottom: var(--space-5);
        line-height: 1.3;
    }

    .features-grid,
    .use-cases-grid {
        gap: var(--space-2);
    }

    .feature-card {
        padding: var(--space-2);
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        margin-bottom: var(--space-1);
    }

    .feature-icon svg {
        width: 20px;
        height: 20px;
    }

    .feature-card h3 {
        font-size: 16px;
        margin-bottom: 6px;
    }

    .feature-card p {
        font-size: 14px;
        line-height: 1.5;
    }

    .step-number {
        width: 48px;
        height: 48px;
        font-size: 20px;
        margin-bottom: var(--space-1);
    }

    .step-content h3 {
        font-size: 16px;
        margin-bottom: 4px;
    }

    .step-content p {
        font-size: 13px;
    }

    .step-arrow {
        margin: 8px 0;
    }

    .use-case {
        padding: var(--space-2);
    }

    .use-case svg {
        width: 28px;
        height: 28px;
        margin-bottom: var(--space-1);
    }

    .use-case h3 {
        font-size: 15px;
        margin-bottom: 4px;
    }

    .use-case p {
        font-size: 13px;
    }

    .cta {
        padding: var(--space-10) 0;
    }

    .cta-container {
        padding: 0 var(--space-2);
    }

    .cta h2 {
        font-size: 26px;
        margin-bottom: var(--space-1);
        line-height: 1.3;
    }

    .cta p {
        font-size: 15px;
        margin-bottom: var(--space-3);
    }

    .footer {
        padding: var(--space-5) 0;
    }

    .footer-container {
        padding: 0 var(--space-2);
    }

    .footer-info p {
        font-size: 13px;
    }

    .footer-links a {
        font-size: 13px;
    }

    .code-preview-header {
        padding: 12px;
    }

    .code-preview-dots span {
        width: 10px;
        height: 10px;
    }

    .code-preview-title {
        font-size: 12px;
    }

    .code-preview-content {
        padding: 12px;
    }

    .code-preview-content pre {
        font-size: 11px;
        line-height: 1.6;
    }
}

/* Smooth Scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-elevated);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-medium);
}

/* Selection */
::selection {
    background: rgba(59, 130, 246, 0.3);
    color: var(--text-primary);
}

/* Focus Styles */
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}