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

:root {
    --primary-color: #0ea5e9;
    --secondary-color: #0284c7;
    --accent-color: #06b6d4;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --text-dark: #0f172a;
    --text-light: #64748b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e2e8f0;
    --code-bg: #1e293b;
    --code-text: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
}

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

/* Navbar */
.navbar {
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.nav-brand h1 {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #0c4a6e 0%, #0284c7 50%, #0ea5e9 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.4;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero .subtitle {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
    font-size: 16px;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

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

.btn-download {
    background-color: var(--primary-color);
    color: white;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    position: relative;
    overflow: hidden;
}

.btn-download::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-download:hover::before {
    left: 100%;
}

.btn-download:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-doc {
    background-color: var(--bg-light);
    color: var(--primary-color);
    border: 1px solid var(--border-color);
}

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

/* Sections */
section {
    padding: 80px 0;
}

section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 16px;
    text-align: center;
    color: var(--text-dark);
}

section > .container > p {
    text-align: center;
    color: var(--text-light);
    font-size: 18px;
    margin-bottom: 48px;
}

/* Download Section */
.download-section {
    background-color: var(--bg-white);
}

.download-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 64px;
}

.card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

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

.card h3 {
    font-size: 22px;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.card .version {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.5;
}

.icon {
    font-size: 24px;
}

/* Install Instructions */
.install-instructions {
    background-color: var(--bg-light);
    border-radius: 12px;
    padding: 32px;
    margin-top: 32px;
}

.install-instructions h3 {
    font-size: 24px;
    margin-bottom: 24px;
    text-align: center;
}

.code-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
}

.tab {
    padding: 12px 24px;
    cursor: pointer;
    font-weight: 500;
    color: var(--text-light);
    transition: all 0.2s;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
}

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

.tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.tab-content {
    display: none;
}

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

/* Code Blocks */
pre {
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.5;
}

code {
    font-family: 'Courier New', Courier, monospace;
}

/* Quick Start */
.quick-start-section {
    background-color: var(--bg-light);
}

.quick-start-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}

.quick-start-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 24px;
    border-left: 4px solid var(--primary-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.quick-start-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.step-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.quick-start-card h3 {
    font-size: 18px;
    margin-bottom: 16px;
    color: var(--text-dark);
}

.quick-start-card pre {
    margin: 0;
    font-size: 13px;
}

/* Documentation */
.documentation-section {
    background-color: var(--bg-white);
}

.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.doc-card {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    transition: all 0.3s;
}

.doc-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

.doc-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
}

.doc-card p {
    color: var(--text-light);
    margin-bottom: 24px;
}

/* Examples */
.examples-section {
    background-color: var(--bg-light);
}

.example-card {
    background-color: var(--bg-white);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.example-card h3 {
    font-size: 20px;
    margin-bottom: 16px;
    color: var(--text-dark);
    text-align: left;
}

.example-card pre {
    margin: 0;
}

/* Features */
.features-section {
    background-color: var(--bg-white);
}

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

.feature {
    text-align: center;
    padding: 24px;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.feature h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.feature p {
    color: var(--text-light);
    line-height: 1.6;
}

/* Footer */
footer {
    background-color: var(--text-dark);
    color: white;
    padding: 48px 0;
    text-align: center;
}

footer p {
    margin-bottom: 8px;
    opacity: 0.9;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    overflow: auto;
}

.modal-content {
    background-color: var(--bg-white);
    margin: 40px auto;
    padding: 40px;
    border-radius: 12px;
    max-width: 900px;
    max-height: 85vh;
    overflow-y: auto;
    position: relative;
}

.close {
    position: absolute;
    right: 24px;
    top: 24px;
    font-size: 32px;
    font-weight: bold;
    color: var(--text-light);
    cursor: pointer;
    transition: color 0.2s;
}

.close:hover {
    color: var(--text-dark);
}

#doc-body {
    line-height: 1.8;
}

#doc-body h1 {
    font-size: 32px;
    margin-bottom: 16px;
    margin-top: 32px;
}

#doc-body h2 {
    font-size: 26px;
    margin-bottom: 12px;
    margin-top: 32px;
    text-align: left;
}

#doc-body h3 {
    font-size: 20px;
    margin-bottom: 12px;
    margin-top: 24px;
}

#doc-body p {
    margin-bottom: 16px;
    color: var(--text-dark);
}

#doc-body ul, #doc-body ol {
    margin-left: 32px;
    margin-bottom: 16px;
}

#doc-body li {
    margin-bottom: 8px;
}

#doc-body pre {
    margin-bottom: 24px;
}

#doc-body code {
    background-color: var(--code-bg);
    color: var(--code-text);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 14px;
}

#doc-body pre code {
    padding: 0;
}

/* Scroll animations */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Loading spinner */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

/* Notification toast */
.notification-toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: white;
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 1000;
    animation: slideInRight 0.3s ease-out;
}

@keyframes slideInRight {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.notification-toast.success {
    border-left: 4px solid var(--success-color);
}

.notification-toast.error {
    border-left: 4px solid var(--error-color);
}

.notification-toast.warning {
    border-left: 4px solid var(--warning-color);
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }

    .hero .subtitle {
        font-size: 16px;
    }

    section {
        padding: 48px 0;
    }

    section h2 {
        font-size: 28px;
    }

    .nav-links {
        gap: 16px;
        font-size: 14px;
    }

    .download-cards,
    .doc-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .quick-start-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: 20px;
        padding: 24px;
    }
}