/* ===================================
   XNM Miner Website - Main Stylesheet
   =================================== */

/* CSS Variables */
:root {
    /* Colors - Dark Theme */
    --bg-primary: #0a0e1a;
    --bg-secondary: #121826;
    --bg-tertiary: #1a2332;
    --bg-card: #1e2939;
    --bg-hover: #243447;

    --text-primary: #e4e6eb;
    --text-secondary: #b0b3b8;
    --text-tertiary: #8a8d93;

    --accent-primary: #00d4ff;
    --accent-secondary: #0099cc;
    --accent-gradient: linear-gradient(135deg, #00d4ff 0%, #0099cc 100%);

    --success: #00ff88;
    --warning: #ffbb00;
    --error: #ff4444;
    --info: #00d4ff;

    --border-color: #2a3544;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f0f2f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f7f8fa;
    --bg-card: #ffffff;
    --bg-hover: #e4e6eb;

    --text-primary: #1c1e21;
    --text-secondary: #65676b;
    --text-tertiary: #8a8d91;

    --accent-primary: #0088cc;
    --accent-secondary: #006699;
    --accent-gradient: linear-gradient(135deg, #0088cc 0%, #006699 100%);

    --success: #00aa55;
    --warning: #dd9900;
    --error: #cc3333;
    --info: #0088cc;

    --border-color: #d0d4d9;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
    --shadow-glow: 0 0 20px rgba(0, 136, 204, 0.2);
}

/* ===================================
   Reset & Base Styles
   =================================== */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-secondary);
}

ul, ol {
    margin-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

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

code {
    font-family: var(--font-mono);
    background: var(--bg-tertiary);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

/* ===================================
   Container & Layout
   =================================== */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section {
    padding: var(--spacing-xxl) 0;
    position: relative;
}

.section-alt {
    background-color: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Navigation
   =================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: background-color var(--transition-normal);
}

/* Navigation Header */
.nav-header {
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
}

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

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-logo-icon {
    width: 60px;
    height: 60px;
    flex-shrink: 0;
    filter: drop-shadow(0 4px 8px rgba(0, 212, 255, 0.3));
    transition: all 0.3s ease;
}

.nav-logo-icon:hover {
    filter: drop-shadow(0 6px 12px rgba(0, 212, 255, 0.5));
    transform: scale(1.05);
}

.nav-logo-icon path {
    animation: logoPathAnimation 3s ease-in-out infinite;
}

.nav-logo-icon circle {
    animation: logoDotAnimation 2s ease-in-out infinite;
}

@keyframes logoPathAnimation {
    0%, 100% {
        stroke-dashoffset: 0;
    }
    50% {
        stroke-dashoffset: 10;
    }
}

@keyframes logoDotAnimation {
    0%, 100% {
        transform: translateY(0);
        opacity: 1;
    }
    50% {
        transform: translateY(-3px);
        opacity: 0.7;
    }
}

.nav-title-group {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.nav-main-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin: 0;
    display: flex;
    align-items: baseline;
    gap: var(--spacing-xs);
}

.nav-subtitle {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-tertiary);
    font-style: normal;
}

.nav-tagline {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-primary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Navigation Menu Bar */
.nav-menu-bar {
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.nav-menu-container {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    position: relative;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    margin: 0;
    justify-content: center;
    width: 100%;
}

.nav-menu li {
    flex: 1;
    text-align: center;
}

.nav-link {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0;
    transition: all var(--transition-fast);
    position: relative;
    border-right: 1px solid var(--border-color);
}

.nav-menu li:last-child .nav-link {
    border-right: none;
}

.nav-link:hover {
    color: var(--accent-primary);
    background: var(--bg-hover);
}

.nav-link.active {
    color: var(--accent-primary);
    background: var(--bg-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-gradient);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
}

.nav-toggle span {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.theme-toggle {
    background: var(--bg-hover);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    color: var(--text-primary);
}

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

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

/* ===================================
   Hero Section
   =================================== */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 160px;
    position: relative;
    overflow: visible;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 153, 204, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content {
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    background: var(--accent-gradient);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    box-shadow: var(--shadow-glow);
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 0.6em;
    color: var(--accent-primary);
    font-weight: 600;
}

.gradient-text {
    display: block;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-tertiary);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* Terminal Visual */
.terminal-window {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    max-width: 100%;
    width: 100%;
    box-sizing: border-box;
}

.terminal-header {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color);
}

.terminal-buttons {
    display: flex;
    gap: 6px;
}

.terminal-buttons span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.terminal-buttons span:nth-child(1) { background: #ff5f56; }
.terminal-buttons span:nth-child(2) { background: #ffbd2e; }
.terminal-buttons span:nth-child(3) { background: #27c93f; }

.terminal-title {
    flex: 1;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.terminal-body {
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.8;
    overflow-x: auto;
    width: 100%;
    box-sizing: border-box;
}

.terminal-line {
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
}

.terminal-line.success {
    color: var(--success);
}

.terminal-line.info {
    color: var(--info);
}

.terminal-line .success {
    color: var(--success);
}

/* ===================================
   Buttons
   =================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn svg {
    width: 20px;
    height: 20px;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    color: white;
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: translateY(-2px);
}

/* ===================================
   Features Section
   =================================== */

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

.feature-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.feature-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

/* ===================================
   Flow Diagram
   =================================== */

.flow-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    padding: var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.flow-step {
    flex: 1;
    min-width: 180px;
    background: var(--bg-tertiary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    transition: all var(--transition-normal);
}

.flow-step:hover {
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.flow-number {
    width: 40px;
    height: 40px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.flow-content h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

.flow-content p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.flow-arrow {
    font-size: 2rem;
    color: var(--accent-primary);
    font-weight: 700;
}

/* Block Types */
.block-types {
    margin-top: var(--spacing-xl);
}

.block-types h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.block-types-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.block-type-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 2px solid;
    transition: all var(--transition-normal);
}

.block-type-card.normal {
    border-color: var(--success);
}

.block-type-card.super {
    border-color: var(--warning);
}

.block-type-card.xuni {
    border-color: var(--accent-primary);
}

.block-type-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.block-type-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.block-type-header svg {
    width: 32px;
    height: 32px;
}

.block-type-card.normal .block-type-header svg {
    color: var(--success);
}

.block-type-card.super .block-type-header svg {
    color: var(--warning);
}

.block-type-card.xuni .block-type-header svg {
    color: var(--accent-primary);
}

.block-type-header h4 {
    margin: 0;
}

.block-type-pattern {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-tertiary);
    border-radius: var(--radius-sm);
}

.block-type-desc {
    color: var(--text-secondary);
    margin: 0;
}

/* ===================================
   Documentation Section
   =================================== */

.docs-container {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.docs-nav {
    display: flex;
    gap: 4px;
    padding: var(--spacing-sm);
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.docs-nav-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.docs-nav-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

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

.docs-content {
    padding: var(--spacing-xl);
}

.doc-section {
    display: none;
}

.doc-section.active {
    display: block;
}

.doc-section h3 {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--border-color);
}

.doc-section h4 {
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.doc-section h5 {
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

/* Step Guide */
.step-guide {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.step {
    display: flex;
    gap: var(--spacing-md);
}

.step-number {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.5rem;
}

.step-content {
    flex: 1;
}

.step-content h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.note {
    background: var(--bg-tertiary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--info);
    margin-top: var(--spacing-sm);
}

/* Code Blocks */
.code-block {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-md) 0;
    overflow-x: auto;
}

.code-block code {
    background: none;
    padding: 0;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-primary);
    white-space: pre;
    display: block;
}

/* Options Table */
.options-table {
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

.options-table table {
    width: 100%;
    border-collapse: collapse;
}

.options-table th,
.options-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.options-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.options-table td {
    color: var(--text-secondary);
}

.options-table tr:hover {
    background: var(--bg-hover);
}

.required {
    display: inline-block;
    background: var(--error);
    color: white;
    font-size: 0.75rem;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    margin-left: var(--spacing-xs);
}

/* Config Sections */
.config-sections {
    display: grid;
    gap: var(--spacing-lg);
}

.config-section {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-primary);
}

.config-section h5 {
    margin-top: 0;
    color: var(--accent-primary);
}

.config-section ul {
    margin-left: var(--spacing-lg);
    margin-bottom: 0;
}

/* Examples */
.example {
    margin-bottom: var(--spacing-xl);
}

.example h4 {
    margin-top: 0;
}

/* API Endpoint */
.api-endpoint {
    margin-bottom: var(--spacing-xl);
}

.endpoint-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
}

.method {
    background: var(--success);
    color: white;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.875rem;
}

.path {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
}

.field-list {
    margin-left: var(--spacing-lg);
}

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

/* ===================================
   Comparison Section
   =================================== */

.comparison-table-container {
    overflow-x: auto;
    margin: var(--spacing-xl) 0;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.comparison-table th,
.comparison-table td {
    padding: var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-tertiary);
    font-weight: 600;
    color: var(--text-primary);
}

.comparison-table th.highlight {
    background: var(--accent-gradient);
    color: white;
}

.comparison-table td {
    color: var(--text-secondary);
}

.comparison-table td.highlight {
    background: rgba(0, 212, 255, 0.1);
}

.comparison-table .check {
    color: var(--success);
    font-size: 1.25rem;
    font-weight: 700;
}

.comparison-table .cross {
    color: var(--error);
    font-size: 1.25rem;
    font-weight: 700;
}

.comparison-table .partial {
    color: var(--warning);
    font-size: 1.25rem;
    font-weight: 700;
}

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

.summary-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.summary-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.summary-card ul {
    margin-left: var(--spacing-lg);
    margin-bottom: 0;
}

/* ===================================
   Download Section
   =================================== */

.download-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1200px) {
    .download-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-2xl);
    }
}

.download-card {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid var(--border-color);
    text-align: center;
    transition: all var(--transition-normal);
    position: relative;
}

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

.download-card.featured-download {
    border: 3px solid var(--accent-primary);
    background: linear-gradient(135deg, var(--bg-card) 0%, rgba(0, 212, 255, 0.05) 100%);
    box-shadow: var(--shadow-glow);
}

.download-card.featured-download:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.download-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-lg);
    background: var(--accent-gradient);
    color: white;
    padding: 4px 16px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-md);
}

.download-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-gradient);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
}

.download-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

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

.download-version {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.download-requirements {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.download-requirements p {
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.download-requirements ul {
    margin-left: var(--spacing-lg);
    margin-bottom: 0;
}

.download-btn {
    width: 100%;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.download-info {
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.checksum {
    display: block;
    word-break: break-all;
}

/* Download Instructions */
.download-instructions {
    background: var(--bg-card);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--spacing-lg);
}

.download-instructions h3 {
    margin-bottom: var(--spacing-md);
}

.instruction-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.instruction-tab {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.instruction-tab:hover {
    background: var(--bg-hover);
}

.instruction-tab.active {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.instruction-content {
    display: none;
}

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

.instruction-content ol {
    margin-left: var(--spacing-xl);
}

.instruction-content li {
    margin-bottom: var(--spacing-sm);
}

.download-note {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--info);
    display: flex;
    gap: var(--spacing-md);
    align-items: start;
}

.download-note svg {
    width: 24px;
    height: 24px;
    color: var(--info);
    flex-shrink: 0;
    margin-top: 2px;
}

.download-note p {
    margin: 0;
}

/* ===================================
   About Section
   =================================== */

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-intro {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.about-card {
    background: var(--bg-card);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.about-card h3 {
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
}

.about-card ul {
    margin-left: var(--spacing-lg);
}

.about-card .card-note {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--radius-sm);
    font-style: italic;
    color: var(--text-secondary);
    font-size: 0.95em;
}

.about-links h3 {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.link-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.link-card {
    background: var(--bg-card);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.link-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    color: var(--accent-primary);
}

.link-card svg {
    width: 24px;
    height: 24px;
    flex-shrink: 0;
}

.link-card.featured-link {
    background: var(--accent-gradient);
    color: white;
    border-color: var(--accent-primary);
    font-weight: 600;
}

.link-card.featured-link:hover {
    border-color: white;
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.link-card.featured-link svg {
    color: white;
}

/* ===================================
   Footer
   =================================== */

.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

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

.footer-section h4 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

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

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

.footer-section a {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.footer-disclaimer {
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
}

/* ===================================
   Back to Top Button
   =================================== */

.back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    color: white;
}

/* ===================================
   Responsive Design
   =================================== */

@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }

    .hero-visual {
        order: -1;
    }

    .hero-title {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    .nav-header {
        padding: var(--spacing-sm) 0;
    }

    .nav-logo-icon {
        width: 48px;
        height: 48px;
    }

    .nav-main-title {
        font-size: 1.25rem;
    }

    .nav-subtitle {
        font-size: 0.75rem;
    }

    .nav-tagline {
        font-size: 0.65rem;
    }

    .nav-menu-container {
        justify-content: flex-start;
    }

    .nav-menu {
        position: fixed;
        top: 130px;
        left: 0;
        right: 0;
        background: var(--bg-secondary);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        border: 1px solid var(--border-color);
        border-top: none;
    }

    .nav-menu li {
        flex: none;
        width: 100%;
        text-align: left;
    }

    .nav-link {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        border-radius: var(--radius-md);
    }

    .nav-menu li:last-child .nav-link {
        border-bottom: none;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-stats {
        grid-template-columns: 1fr;
    }

    .flow-diagram {
        flex-direction: column;
    }

    .flow-arrow {
        transform: rotate(90deg);
    }

    .features-grid,
    .block-types-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .section {
        padding: var(--spacing-xl) 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .docs-nav {
        flex-wrap: nowrap;
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
        overflow-x: hidden;
    }

    body {
        overflow-x: hidden;
        width: 100%;
        max-width: 100vw;
    }

    .container {
        padding: 0 1rem;
        max-width: 100%;
        width: 100%;
    }

    .hero {
        padding-top: 140px;
        overflow-x: hidden;
        width: 100%;
    }

    .hero-container {
        width: 100%;
        max-width: 100%;
        padding: 0;
    }

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

    .hero-badge {
        font-size: 0.75rem;
        padding: 0.25rem 0.75rem;
    }

    .hero-title {
        font-size: 1.5rem;
        line-height: 1.2;
        word-wrap: break-word;
    }

    .hero-subtitle {
        display: block;
        font-size: 1rem;
        margin-top: 0.25rem;
    }

    .gradient-text {
        display: block;
        font-size: 1.25rem;
        margin-top: 0.25rem;
    }

    .hero-visual {
        margin: 0;
        padding: 0;
        width: 100%;
        max-width: 100%;
        overflow: hidden;
    }

    .terminal-window {
        margin: 0;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }

    .terminal-header {
        padding: 0.5rem;
    }

    .terminal-body {
        font-size: 0.6rem;
        padding: 0.75rem;
        overflow-x: auto;
        word-wrap: break-word;
        -webkit-overflow-scrolling: touch;
    }

    .terminal-line {
        white-space: nowrap;
        font-size: 0.6rem;
    }

    .hero-description {
        font-size: 0.95rem;
        margin-bottom: 1rem;
    }

    .hero-stats {
        gap: 0.75rem;
        margin-bottom: 1.5rem;
    }

    .stat-value {
        font-size: 1.25rem;
    }

    .stat-label {
        font-size: 0.7rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 0.75rem;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

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

    .section-title {
        font-size: 1.5rem;
    }

    .comparison-table {
        font-size: 0.75rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: var(--spacing-xs);
    }

    .feature-card,
    .download-card {
        padding: var(--spacing-md);
    }

    .feature-icon,
    .download-icon {
        width: 48px;
        height: 48px;
        margin-bottom: var(--spacing-sm);
    }

    /* Documentation Section Mobile */
    .docs-container {
        margin: 0;
        border-radius: var(--radius-md);
    }

    .docs-nav {
        padding: 0.5rem;
        gap: 0.25rem;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .docs-nav-btn {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
        white-space: nowrap;
    }

    .docs-content {
        padding: 1rem;
        width: 100%;
        box-sizing: border-box;
    }

    .doc-section h3 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .doc-section p {
        font-size: 0.9rem;
        margin-bottom: 0.75rem;
    }

    .code-block {
        padding: 0.75rem;
        margin: 0.75rem 0;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .code-block code {
        font-size: 0.7rem;
        line-height: 1.4;
        white-space: pre;
    }

    .options-table {
        overflow-x: auto;
        margin: 1rem 0;
        -webkit-overflow-scrolling: touch;
    }

    .options-table table {
        min-width: 100%;
        font-size: 0.75rem;
    }

    .options-table th,
    .options-table td {
        padding: 0.5rem;
        font-size: 0.75rem;
    }

    .options-table th {
        white-space: nowrap;
    }

    .required,
    .optional {
        font-size: 0.65rem;
        padding: 0.15rem 0.4rem;
    }

    .doc-section ul,
    .doc-section ol {
        padding-left: 1.25rem;
        margin: 0.75rem 0;
    }

    .doc-section li {
        font-size: 0.9rem;
        margin-bottom: 0.5rem;
    }
}

/* ===================================
   Animations
   =================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Scroll animations (will be triggered by JS) */
.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.scroll-reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}