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

:root {
    --go-blue: #00ADD8;
    --go-blue-dark: #0088a8;
    --dark-bg: #1a1a1a;
    --darker-bg: #0f0f0f;
    --card-bg: #252525;
    --border-color: #333;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-green: #28a745;
    --accent-yellow: #c49000;
    --accent-red: #d73a49;
    --shadow: rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    background: var(--darker-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    font-size: 1.2rem;
}

.nav-brand a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
}

.logo {
    font-size: 1.2rem;
    font-weight: 700;
    background: var(--go-blue);
    color: #000;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-weight: 500;
    font-size: 0.95rem;
}

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

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--card-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.github-link:hover {
    border-color: var(--go-blue);
}

/* Mobile menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    transition: transform 0.2s;
}

/* Hero Section */
.hero {
    padding: 5rem 0;
    background: var(--darker-bg);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--go-blue);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.hero-stats {
    display: flex;
    gap: 2.5rem;
    margin-bottom: 2rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--go-blue);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cta-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.875rem 1.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    display: inline-block;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--go-blue);
    color: #000;
}

.btn-primary:hover {
    background: #00c4f0;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--go-blue);
    transform: translateY(-1px);
}

/* Code Example */
.hero-visual {
    position: relative;
}

.code-example {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
}

.code-header {
    background: var(--darker-bg);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.code-header.optimized {
    background: var(--darker-bg);
    border-left: 3px solid var(--accent-green);
}

.code-title {
    font-weight: 600;
    font-size: 0.9rem;
}

.code-size {
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.code-size.bad-size {
    background: rgba(215, 58, 73, 0.15);
    color: var(--accent-red);
}

.code-size.good-size {
    background: rgba(40, 167, 69, 0.15);
    color: var(--accent-green);
}

.savings {
    font-size: 0.8rem;
    opacity: 0.9;
}

.code-example pre {
    padding: 1.25rem;
    overflow-x: auto;
    margin: 0;
}

.code-example code {
    font-size: 0.875rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.code-example .comment {
    color: #6a737d;
}

.optimization-arrow {
    text-align: center;
    padding: 0.75rem;
    font-weight: 600;
    color: var(--accent-green);
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.arrow-icon {
    font-size: 1.1rem;
}

/* Section common styles */
section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.25rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    font-size: 1.1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features */
.features {
    background: var(--darker-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    background: var(--card-bg);
    padding: 1.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.2s, transform 0.2s;
}

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

.feature-icon {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 1rem;
    display: inline-block;
    padding: 0.4rem 0.8rem;
    background: var(--go-blue);
    color: #000;
    border-radius: 4px;
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Calculator Section */
.calculator-section {
    background: var(--dark-bg);
}

.calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
}

.calculator-input {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.calc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 600;
}

.arch-toggle {
    display: flex;
    gap: 0.25rem;
}

.arch-btn {
    padding: 0.35rem 0.75rem;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.8rem;
    font-family: 'Fira Code', monospace;
    transition: all 0.2s;
}

.arch-btn:hover {
    border-color: var(--go-blue);
}

.arch-btn.active {
    background: var(--go-blue);
    color: #000;
    border-color: var(--go-blue);
}

.field-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
    max-height: 320px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--go-blue) var(--darker-bg);
}

.field-list::-webkit-scrollbar {
    width: 6px;
}

.field-list::-webkit-scrollbar-track {
    background: var(--darker-bg);
    border-radius: 3px;
}

.field-list::-webkit-scrollbar-thumb {
    background: var(--go-blue);
    border-radius: 3px;
}

.field-item {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.field-name {
    flex: 1;
    min-width: 80px;
    padding: 0.5rem;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

.field-type {
    width: 120px;
    padding: 0.5rem;
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--go-blue);
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    cursor: pointer;
}

.remove-field {
    padding: 0.25rem 0.5rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--accent-red);
    cursor: pointer;
    font-size: 1rem;
    line-height: 1;
    transition: all 0.2s;
}

.remove-field:hover {
    background: var(--accent-red);
    color: #fff;
    border-color: var(--accent-red);
}

.add-field-btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--darker-bg);
    border: 1px dashed var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s;
}

.add-field-btn:hover {
    border-color: var(--go-blue);
    color: var(--go-blue);
}

.calculator-output {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.calc-result {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-weight: 600;
}

.result-size {
    font-family: 'Fira Code', monospace;
    font-size: 1.1rem;
    color: var(--go-blue);
}

.memory-viz {
    display: flex;
    height: 24px;
    background: var(--darker-bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.mem-block {
    height: 100%;
    position: relative;
}

.mem-block.used {
    background: var(--go-blue);
}

.mem-block.padding {
    background: var(--accent-yellow);
    opacity: 0.6;
}

.result-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.detail-item span:last-child {
    font-family: 'Fira Code', monospace;
    color: var(--text-primary);
}

.calc-optimized {
    background: var(--card-bg);
    border: 1px solid var(--accent-green);
    border-radius: 8px;
    padding: 1.5rem;
}

.optimized-header {
    border-bottom: none;
    margin-bottom: 0.75rem;
}

.optimized-size {
    color: var(--accent-green);
}

.savings-bar {
    height: 8px;
    background: var(--darker-bg);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.savings-fill {
    height: 100%;
    background: var(--accent-green);
    transition: width 0.3s;
}

.savings-text {
    font-size: 0.85rem;
    color: var(--accent-green);
}

/* Demo Section */
.demo {
    background: var(--dark-bg);
}

.demo-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.demo-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.demo-text > p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.demo-list {
    list-style: none;
    margin: 1.5rem 0;
}

.demo-list li {
    padding: 0.6rem 0;
    font-size: 1rem;
}

.demo-note {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.key-benefits {
    margin-top: 2rem;
    padding: 1.25rem;
    background: var(--card-bg);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.key-benefits h4 {
    margin-bottom: 0.75rem;
    color: var(--go-blue);
    font-size: 1rem;
}

.key-benefits ul {
    list-style: none;
}

.key-benefits li {
    padding: 0.4rem 0;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.key-benefits li strong {
    color: var(--text-primary);
}

.marker {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    text-align: center;
    border-radius: 3px;
    font-weight: 700;
    font-size: 0.65rem;
    margin-right: 0.5rem;
    letter-spacing: 0.5px;
}

.marker-bad {
    background: var(--accent-red);
    color: #fff;
}

.marker-good {
    background: var(--accent-green);
    color: #fff;
}

.marker-info {
    background: var(--go-blue);
    color: #000;
}

.memory-layout {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
}

.layout-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.memory-block {
    margin-bottom: 0.4rem;
    padding: 0.75rem 1rem;
    border-radius: 4px;
    display: flex;
    justify-content: space-between;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
}

.memory-block.good {
    background: rgba(40, 167, 69, 0.1);
    border-left: 3px solid var(--accent-green);
}

.memory-block.bad {
    background: rgba(196, 144, 0, 0.1);
    border-left: 3px solid var(--accent-yellow);
}

.memory-padding {
    color: var(--accent-yellow);
    font-style: italic;
}

.layout-footer {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.legend-color {
    width: 12px;
    height: 12px;
    border-radius: 2px;
}

.legend-color.good {
    background: var(--accent-green);
}

.legend-color.bad {
    background: var(--accent-yellow);
}

/* FAQ Section */
.faq-section {
    background: var(--darker-bg);
}

.faq-grid {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.faq-item summary {
    padding: 1rem 1.25rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-primary);
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-item summary::-webkit-details-marker {
    display: none;
}

.faq-item summary::after {
    content: '+';
    font-size: 1.25rem;
    color: var(--go-blue);
    transition: transform 0.2s;
}

.faq-item[open] summary::after {
    transform: rotate(45deg);
}

.faq-item p {
    padding: 0 1.25rem 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 0.95rem;
}

/* Install Section */
.install {
    background: var(--dark-bg);
}

.install-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
}

.install-card {
    background: var(--card-bg);
    padding: 1.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.install-card h3 {
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    color: var(--go-blue);
}

.install-card ol {
    margin-left: 1.25rem;
    margin-bottom: 1.25rem;
}

.install-card ol li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.install-card pre {
    background: var(--darker-bg);
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin: 1rem 0;
    border: 1px solid var(--border-color);
}

.install-card code {
    font-size: 0.85rem;
    color: var(--text-primary);
    line-height: 1.8;
}

.cmd-prompt {
    color: var(--go-blue);
    user-select: none;
}

kbd {
    background: var(--darker-bg);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    padding: 0.15rem 0.4rem;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
}

/* Docs Section */
.docs {
    background: var(--darker-bg);
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.doc-card {
    background: var(--card-bg);
    padding: 1.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    position: relative;
}

.doc-number {
    position: absolute;
    top: -1rem;
    left: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    background: var(--go-blue);
    color: #000;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    font-weight: 700;
}

.doc-card h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    margin-top: 0.75rem;
}

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

.docs-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.doc-link {
    color: var(--go-blue);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: color 0.2s;
}

.doc-link:hover {
    color: #00c4f0;
}

/* Benefits Section */
.benefits {
    background: var(--dark-bg);
}

.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.benefit {
    background: var(--card-bg);
    padding: 1.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.benefit h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.benefit p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.benefit-icon {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    text-align: center;
    background: var(--go-blue);
    color: #000;
    border-radius: 4px;
    margin-right: 0.5rem;
    font-weight: 700;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
}

/* Footer */
.footer {
    background: var(--darker-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--go-blue);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

.footer-version {
    font-family: 'Fira Code', monospace;
    color: var(--accent-green);
}

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

.footer-section ul li {
    margin-bottom: 0.4rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.9rem;
}

.footer-section a:hover {
    color: var(--go-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.footer-tagline {
    margin-top: 0.5rem;
    color: var(--go-blue);
    font-size: 0.85rem;
}

/* Responsive */
@media (max-width: 968px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

    .demo-content {
        grid-template-columns: 1fr;
    }

    .calculator-wrapper {
        grid-template-columns: 1fr;
    }

    .hero-content h1 {
        font-size: 2.25rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--darker-bg);
        flex-direction: column;
        padding: 1rem;
        border-bottom: 1px solid var(--border-color);
        gap: 0.75rem;
    }

    .nav-links.active {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

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

@media (max-width: 640px) {
    .hero-content h1 {
        font-size: 1.75rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .hero-stats {
        gap: 1.25rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .cta-buttons {
        flex-direction: column;
    }

    .nav-brand .brand-text {
        display: none;
    }

    .docs-links {
        gap: 1rem;
    }

    .arch-toggle {
        flex-wrap: wrap;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--go-blue);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .navbar, .cta-buttons, .calculator-section {
        display: none;
    }
    
    body {
        background: #fff;
        color: #000;
    }
}