/* Base & Variables */
:root {
    /* Color Palette - Dark Mode Default */
    --bg-main: #0a0f18;
    --bg-alt: #111827;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.1);
    
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.5);
    
    --secondary: #ec4899;
    --secondary-hover: #db2777;
    
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
    
    --nav-height: 72px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    --bg-main: #ffffff;
    --bg-alt: #f9fafb;
    --bg-card: #ffffff;
    --border-color: #e5e7eb;
    
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #9ca3af;
    
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    
    --secondary: #db2777;
    --secondary-hover: #be185d;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition);
}

img {
    max-width: 100%;
    height: auto;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-gradient {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.bg-alt { background-color: var(--bg-alt); }
.mt-4 { margin-top: 2rem; }
.justify-center { justify-content: center; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    gap: 8px;
    border: 1px solid transparent;
}

.btn-large {
    padding: 14px 28px;
    font-size: 1.05rem;
    border-radius: var(--radius-md);
}

.btn-full { width: 100%; }

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 14px 0 var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 var(--primary-glow);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-primary);
}

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

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background-color: rgba(var(--bg-main), 0.8);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a:not(.btn) {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
}

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

.theme-toggle {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
}

[data-theme="dark"] .light-icon { display: none; }
[data-theme="light"] .dark-icon { display: none; }

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(var(--nav-height) + 80px) 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
    z-index: -1;
}

.orb-1 {
    top: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-glow), transparent 70%);
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(236, 72, 153, 0.3), transparent 70%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 24px;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 540px;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Code Window */
.code-window {
    background-color: #1e1e1e; /* Fixed dark for code block to look like IDE */
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
    transition: transform 0.5s ease;
}

.code-window:hover {
    transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
}

.window-header {
    background-color: #2d2d2d;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.window-controls {
    display: flex;
    gap: 8px;
}

.control {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.close { background-color: #ff5f56; }
.minimize { background-color: #ffbd2e; }
.maximize { background-color: #27c93f; }

.window-title {
    margin: 0 auto;
    color: #8b949e;
    font-family: var(--font-sans);
    font-size: 0.85rem;
    padding-right: 44px; /* Offset controls to center text */
}

.window-body {
    padding: 24px;
    overflow-x: auto;
}

pre {
    margin: 0;
}

code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
    color: #e6edf3;
}

.token-comment { color: #8b949e; }
.token-string { color: #a5d6ff; }
.token-property { color: #7ee787; }

/* Sections */
.section {
    padding: 100px 0;
}

.section-header {
    margin-bottom: 64px;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-header p {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Features Grid */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* How It Works Steps */
.steps-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    position: relative;
    max-width: 1000px;
    margin: 0 auto;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 16px;
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--bg-main);
    border: 2px solid var(--primary);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 auto 24px;
}

.step h3 {
    font-size: 1.15rem;
    margin-bottom: 8px;
}

.step p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.step-connector {
    flex: 1;
    height: 2px;
    background: linear-gradient(90deg, var(--primary) 0%, rgba(99, 102, 241, 0.2) 100%);
    margin-top: 24px;
    position: relative;
    z-index: 1;
    min-width: 50px;
}

/* Interactive API Docs */
.api-preview-container {
    display: flex;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    min-height: 400px;
}

.api-endpoints {
    width: 300px;
    border-right: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.02);
}

.endpoint-btn {
    width: 100%;
    text-align: left;
    padding: 16px 24px;
    background: none;
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.endpoint-btn:hover {
    background-color: rgba(255, 255, 255, 0.05);
}

.endpoint-btn.active {
    background-color: var(--bg-main);
    color: var(--text-primary);
    border-left: 3px solid var(--primary);
}

.method {
    font-weight: 700;
    font-size: 0.8rem;
    padding: 2px 6px;
    border-radius: 4px;
    margin-right: 8px;
}

.method.post { background-color: rgba(16, 185, 129, 0.1); color: var(--success); }
.method.get { background-color: rgba(59, 130, 246, 0.1); color: #3b82f6; }
.method.delete { background-color: rgba(239, 68, 68, 0.1); color: var(--danger); }

.api-code-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: #0d1117; /* GitHub Dark style */
}

.code-tabs {
    display: flex;
    border-bottom: 1px solid #30363d;
    padding: 0 16px;
}

.code-tab {
    padding: 12px 24px;
    background: none;
    border: none;
    color: #8b949e;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}

.code-tab.active {
    color: #e6edf3;
    border-bottom-color: #f78166;
}

.code-content {
    display: none;
    padding: 24px;
    flex: 1;
    overflow-y: auto;
    overflow-x: auto;
}

.code-content.active {
    display: block;
}

.code-content code {
    color: #e6edf3;
}

/* Use Cases */
.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.use-case-card {
    background-color: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 32px;
    text-align: center;
}

.uc-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.use-case-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.use-case-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Pricing Section */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    align-items: center;
}

.price-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
}

.price-card.popular {
    border-color: var(--primary);
    transform: scale(1.05);
    box-shadow: 0 20px 40px -10px rgba(99, 102, 241, 0.1);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.price-card h3 {
    font-size: 1.5rem;
    margin-bottom: 16px;
}

.price {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.price span {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.price-desc {
    color: var(--text-secondary);
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
}

.price-features li {
    margin-bottom: 16px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
}

.price-features li i {
    color: var(--success);
}

/* Security Section */
.security-content {
    display: flex;
    align-items: center;
    gap: 64px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 64px;
}

.security-text {
    flex: 1;
}

.security-text h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.security-text p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.security-list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.security-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
}

.security-list li i {
    font-size: 1.2rem;
}

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

.shield-graphic {
    position: relative;
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: var(--primary);
}

.rings {
    position: absolute;
    inset: 0;
}

.ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px solid rgba(99, 102, 241, 0.2);
    border-radius: 50%;
}

.r1 { width: 100%; height: 100%; animation: pulse 3s infinite; }
.r2 { width: 140%; height: 140%; animation: pulse 3s infinite 1s; }
.r3 { width: 180%; height: 180%; animation: pulse 3s infinite 2s; }

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.8); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 0; }
}

/* CTA Section */
.cta-section {
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 0%, rgba(99, 102, 241, 0.05) 100%);
    z-index: -1;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 80px 0 32px;
    background-color: var(--bg-alt);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 64px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin: 16px 0 24px;
    max-width: 250px;
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.25rem;
}

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

.footer-links h4 {
    margin-bottom: 24px;
    font-size: 1.1rem;
}

.footer-links a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

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

.footer-bottom {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .hero-container { grid-template-columns: 1fr; text-align: center; }
    .hero-subtitle { margin: 0 auto 40px; }
    .hero-ctas { justify-content: center; }
    
    .code-window { transform: none; margin-top: 32px; }
    .code-window:hover { transform: none; }
    
    .price-card.popular { transform: none; }
    .api-preview-container { flex-direction: column; }
    .api-endpoints { width: 100%; border-right: none; border-bottom: 1px solid var(--border-color); display: flex; overflow-x: auto;}
    .endpoint-btn { padding: 12px 16px; white-space: nowrap; border-bottom: none; border-left: none;}
    .endpoint-btn.active { border-bottom: 3px solid var(--primary); }
    
    .security-content { flex-direction: column; text-align: center; padding: 40px 24px;}
    .security-list { text-align: left; }
}

@media (max-width: 768px) {
    .section { padding: 60px 0; }
    
    .logo { font-size: 1.2rem; }
    .logo-subtext { display: none; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background-color: var(--bg-main);
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
    }
    
    .nav-links.active { display: flex; }
    .mobile-menu-btn { display: block; }
    
    .steps-container { flex-direction: column; align-items: center; gap: 32px; }
    .step-connector { width: 2px; height: 32px; min-width: 0; margin: 0; }
    
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    
    .security-list { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2.2rem; }
    .footer-grid { grid-template-columns: 1fr; }
}