/* ================================
   EPH4 Documentation Styles
   ================================
   Design tokens matching EPH4 app
   Single-page documentation styling
   ================================ */

/* ========== CSS VARIABLES (EPH4 Design Tokens) ========== */
:root {
    /* Primary Colors */
    --color-primary: #00f354;
    --color-primary-hover: #00d946;
    --color-primary-light: rgba(0, 243, 84, 0.1);
    --color-primary-border: rgba(0, 243, 84, 0.3);

    /* Backgrounds */
    --color-bg: #ffffff;
    --color-bg-secondary: #fafafa;
    --color-bg-tertiary: #f5f5f5;
    --color-bg-glass: rgba(255, 255, 255, 0.95);

    /* Text */
    --color-text: #0a0a0a;
    --color-text-secondary: #525252;
    --color-text-muted: #737373;
    --color-text-inverse: #ffffff;

    /* Borders */
    --color-border: #e5e5e5;
    --color-border-hover: #d4d4d4;
    --color-border-light: #f0f0f0;

    /* Status Colors */
    --color-success: #16a34a;
    --color-success-bg: rgba(22, 163, 74, 0.1);
    --color-success-border: rgba(22, 163, 74, 0.3);

    --color-warning: #f59e0b;
    --color-warning-bg: #fef3c7;
    --color-warning-border: #fcd34d;

    --color-error: #ef4444;
    --color-error-bg: #fee2e2;
    --color-error-border: #fca5a5;

    --color-info: #3b82f6;
    --color-info-bg: #dbeafe;
    --color-info-border: #93c5fd;

    /* File Type Colors */
    --color-pdf: #dc2626;
    --color-pdf-bg: #fee2e2;
    --color-doc: #2563eb;
    --color-doc-bg: #dbeafe;
    --color-excel: #16a34a;
    --color-excel-bg: #dcfce7;
    --color-ppt: #ea580c;
    --color-ppt-bg: #ffedd5;
    --color-csv: #16a34a;
    --color-csv-bg: #dcfce7;

    /* Typography */
    --font-heading: 'Inconsolata', monospace;
    --font-body: 'Source Sans 3', sans-serif;
    --font-mono: 'Source Code Pro', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
    --shadow-primary: 0 4px 14px rgba(0, 243, 84, 0.25);

    /* Layout */
    --sidebar-width: 280px;
    --header-height: 60px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-success), var(--color-text));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.75rem;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
}

h3 {
    font-size: 1.25rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
}

h4 {
    font-size: 1.1rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

p {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

.lead {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}

a {
    color: var(--color-success);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 0.125rem 0.375rem;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

ul, ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
    color: var(--color-text-secondary);
}

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

/* ========== SIDEBAR ========== */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background-color: var(--color-bg);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.logo-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 0.2rem 0.5rem;
    background-color: var(--color-success);
    color: var(--color-text-inverse);
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.mobile-close {
    display: none;
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--color-text-muted);
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md) 0;
}

.nav-section {
    margin-bottom: var(--spacing-md);
}

.nav-section-title {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    padding: var(--spacing-sm) var(--spacing-lg);
    margin-bottom: var(--spacing-xs);
}

.nav-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.nav-link:hover {
    color: var(--color-text);
    background-color: var(--color-bg-secondary);
}

.nav-link.active {
    color: var(--color-success);
    background-color: var(--color-success-bg);
    border-left-color: var(--color-success);
    font-weight: 600;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.back-to-app {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-text);
    color: var(--color-text-inverse);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.back-to-app:hover {
    background-color: var(--color-text-secondary);
    color: var(--color-text-inverse);
}

/* ========== MOBILE HEADER ========== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--color-bg-glass);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--spacing-md);
    align-items: center;
    gap: var(--spacing-md);
    z-index: 90;
}

.mobile-menu-btn {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--color-text);
}

.mobile-logo {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.2rem;
}

.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

/* ========== MAIN CONTENT ========== */
.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-2xl) var(--spacing-xl);
}

/* ========== SECTIONS ========== */
.doc-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border-light);
}

.doc-section:last-of-type {
    border-bottom: none;
}

.section-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-success);
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
}

/* ========== INTRO HERO ========== */
.intro-hero {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border-light);
}

.intro-logo {
    margin-bottom: var(--spacing-lg);
}

.intro-logo img {
    max-width: 180px;
    height: auto;
    filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.1));
    transition: transform 0.3s ease;
}

.intro-logo img:hover {
    transform: scale(1.02);
}

.intro-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-sm);
}

.intro-nav-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.2s ease;
}

.intro-nav-link svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.intro-nav-link:hover {
    color: var(--color-success);
    background-color: var(--color-success-bg);
    border-color: var(--color-success-border);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.intro-nav-link:active {
    transform: translateY(0);
}

@media (max-width: 640px) {
    .intro-hero {
        padding: var(--spacing-lg) 0;
    }

    .intro-logo img {
        max-width: 140px;
    }

    .intro-nav {
        gap: var(--spacing-xs);
    }

    .intro-nav-link {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: 0.8rem;
    }
}

/* ========== FEATURE GRID ========== */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.feature-card {
    padding: var(--spacing-lg);
    background-color: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.feature-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success-bg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

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

.feature-card h3 {
    font-size: 1rem;
    margin: 0 0 var(--spacing-sm) 0;
}

.feature-card p {
    font-size: 0.9rem;
    margin: 0;
    color: var(--color-text-muted);
}

/* ========== CALLOUTS ========== */
.callout {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
}

.callout-icon {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
}

.callout-icon svg {
    width: 24px;
    height: 24px;
}

.callout-content strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.callout-content p {
    margin: 0;
    font-size: 0.9rem;
}

.callout-info {
    background-color: var(--color-info-bg);
    border: 1px solid var(--color-info-border);
}

.callout-info .callout-icon {
    color: var(--color-info);
}

.callout-info strong {
    color: var(--color-info);
}

.callout-warning {
    background-color: var(--color-warning-bg);
    border: 1px solid var(--color-warning-border);
}

.callout-warning .callout-icon {
    color: var(--color-warning);
}

.callout-warning strong {
    color: var(--color-warning);
}

.callout-success {
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
}

.callout-success .callout-icon {
    color: var(--color-success);
}

.callout-success strong {
    color: var(--color-success);
}

/* ========== STEPS ========== */
.steps-container {
    margin: var(--spacing-xl) 0;
}

.step {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.step:last-child {
    border-bottom: none;
}

.step-number {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success);
    color: var(--color-text-inverse);
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    border-radius: var(--radius-md);
}

.step-content h4 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 1.1rem;
}

.step-content p {
    margin: 0;
}

/* ========== NUMBERED LIST ========== */
.numbered-list {
    counter-reset: list-counter;
    list-style: none;
    padding-left: 0;
}

.numbered-list li {
    counter-increment: list-counter;
    position: relative;
    padding-left: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.numbered-list li::before {
    content: counter(list-counter);
    position: absolute;
    left: 0;
    width: 1.75rem;
    height: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

/* ========== REQUIREMENTS GRID ========== */
.requirements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

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

.requirement-card h4 {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 1rem;
}

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

/* ========== CODE BLOCK ========== */
.code-block {
    background-color: var(--color-text);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-md) 0;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-primary);
    background: none;
    border: none;
    padding: 0;
}

/* ========== TIER CARD ========== */
.tier-card {
    background-color: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    margin: var(--spacing-xl) 0;
}

.tier-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-success-bg), var(--color-bg-secondary));
    border-bottom: 1px solid var(--color-border);
}

.tier-name {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
}

.tier-price {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-success);
}

.tier-badge-enterprise {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-text);
    color: var(--color-text-inverse);
    border-radius: var(--radius-sm);
}

.tier-features {
    padding: var(--spacing-lg);
}

.tier-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
}

.tier-feature svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-success);
}

.tier-feature.warning svg {
    color: var(--color-warning);
}

.workspace-tier .tier-header {
    background: linear-gradient(160deg, #a8a8a8 0%, #d8d8d8 8%, #f0f0f0 18%, #ffffff 30%, #ffffff 40%, #f5f5f5 50%, #ffffff 60%, #e8e8e8 75%, #c0c0c0 88%, #a0a0a0 100%);
}

/* ========== SCREENSHOT PLACEHOLDER ========== */
.screenshot-placeholder {
    background-color: var(--color-bg-secondary);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    margin: var(--spacing-lg) 0;
    text-align: center;
}

/* ========== SCREENSHOT IMAGE ========== */
.screenshot-container {
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
}

.screenshot-img {
    display: block;
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
}

.placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-muted);
}

.placeholder-content svg {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

/* ========== METRICS EXAMPLE ========== */
.metrics-example {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
}

.metric {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.metric-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.metric-value {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-success);
}

/* ========== FORMAT GRID ========== */
.format-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.format-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    border: 1px solid;
}

.format-badge {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 700;
}

.format-ext {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.format-pdf {
    background-color: var(--color-pdf-bg);
    border-color: var(--color-pdf);
}
.format-pdf .format-badge { color: var(--color-pdf); }

.format-doc {
    background-color: var(--color-doc-bg);
    border-color: var(--color-doc);
}
.format-doc .format-badge { color: var(--color-doc); }

.format-excel, .format-csv {
    background-color: var(--color-excel-bg);
    border-color: var(--color-excel);
}
.format-excel .format-badge, .format-csv .format-badge { color: var(--color-excel); }

.format-ppt {
    background-color: var(--color-ppt-bg);
    border-color: var(--color-ppt);
}
.format-ppt .format-badge { color: var(--color-ppt); }

/* ========== STATUS LIST ========== */
.status-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

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

.status-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    white-space: nowrap;
}

.status-pending {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
    border: 1px solid var(--color-warning-border);
}

.status-ready {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success-border);
}

/* ========== BEST PRACTICES ========== */
.best-practices {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.practice {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
}

.practice-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.practice ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.practice li {
    font-size: 0.9rem;
}

.practice.good {
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
}

.practice.good .practice-label {
    color: var(--color-text-muted);
}

.practice.better {
    background-color: var(--color-success-bg);
    border: 1px solid var(--color-success-border);
}

.practice.better .practice-label {
    color: var(--color-success);
}

/* ========== MODE CARDS ========== */
.mode-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.mode-card {
    padding: var(--spacing-lg);
    background-color: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all 0.2s ease;
}

.mode-card:hover {
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-md);
}

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

.mode-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

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

.mode-header h4 {
    margin: 0;
    font-size: 1rem;
}

.mode-badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-sm);
}

.mode-card p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.mode-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.mode-features span {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
}

/* Mode-specific styling */
.mode-structured .mode-icon {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.mode-badge-structured {
    background-color: var(--color-success-bg);
    color: var(--color-success);
}

.mode-semantic .mode-icon {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.mode-badge-semantic {
    background-color: var(--color-info-bg);
    color: var(--color-info);
}

.mode-pattern .mode-icon {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

.mode-badge-pattern {
    background-color: var(--color-warning-bg);
    color: var(--color-warning);
}

/* ========== CHART GRID ========== */
.chart-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.chart-type {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.chart-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-success);
}

.chart-icon svg {
    width: 24px;
    height: 24px;
}

.chart-type span {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* ========== SECURITY FEATURES ========== */
.security-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.security-feature {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.security-icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success-bg);
    border-radius: var(--radius-md);
    color: var(--color-success);
}

.security-icon svg {
    width: 24px;
    height: 24px;
}

.security-content h4 {
    margin: 0 0 var(--spacing-xs) 0;
}

.security-content p {
    margin: 0;
    font-size: 0.9rem;
}

/* ========== DATA FLOW ========== */
.data-flow {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-lg);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.flow-step {
    flex: 1;
    min-width: 150px;
    text-align: center;
}

.flow-number {
    width: 36px;
    height: 36px;
    margin: 0 auto var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success);
    color: var(--color-text-inverse);
    font-family: var(--font-heading);
    font-weight: 700;
    border-radius: 50%;
}

.flow-content h4 {
    font-size: 0.9rem;
    margin: 0 0 var(--spacing-xs) 0;
}

.flow-content p {
    font-size: 0.8rem;
    margin: 0;
}

.flow-arrow {
    display: flex;
    align-items: center;
    padding-top: 36px;
    color: var(--color-border-hover);
}

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

/* ========== ENCRYPTION BADGE ========== */
.encryption-badge {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-info-bg), var(--color-bg-secondary));
    border: 1px solid var(--color-info-border);
    border-radius: var(--radius-xl);
    margin: var(--spacing-xl) 0;
}

.encryption-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-info);
    border-radius: var(--radius-lg);
    color: var(--color-text-inverse);
}

.encryption-icon svg {
    width: 32px;
    height: 32px;
}

.encryption-details h4 {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 1.25rem;
}

.encryption-details p {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-info);
}

.encryption-details ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

/* ========== FAQ ========== */
.faq-list {
    margin: var(--spacing-xl) 0;
}

.faq-item {
    border-bottom: 1px solid var(--color-border);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
}

.faq-question span {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.faq-question svg {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    color: var(--color-text-muted);
    transition: transform 0.2s ease;
}

.faq-item.open .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    display: none;
    padding-bottom: var(--spacing-lg);
}

.faq-item.open .faq-answer {
    display: block;
}

.faq-answer p {
    margin: 0;
}

/* ========== TROUBLESHOOT ========== */
.troubleshoot-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

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

.troubleshoot-item h4 {
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-error);
}

.troubleshoot-item p {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 0.9rem;
}

.troubleshoot-item p:last-child {
    margin-bottom: 0;
}

/* ========== SUPPORT OPTIONS ========== */
.support-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.support-card {
    padding: var(--spacing-xl);
    background-color: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    text-align: center;
}

.support-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-success-bg);
    border-radius: 50%;
    color: var(--color-success);
}

.support-icon svg {
    width: 28px;
    height: 28px;
}

.support-card h4 {
    margin: 0 0 var(--spacing-sm) 0;
}

.support-card p {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.support-link {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-text);
    color: var(--color-text-inverse);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.support-link:hover {
    background-color: var(--color-text-secondary);
    color: var(--color-text-inverse);
}

/* ========== FOOTER ========== */
.doc-footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-logo-img {
    max-width: 120px;
    height: auto;
    filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.1));
}

.footer-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.footer-brand p {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.footer-copyright p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin: 0;
}

.footer-address {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs) !important;
    opacity: 0.8;
}

/* ========== MOBILE RESPONSIVE ========== */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .mobile-header {
        display: flex;
    }

    .mobile-close {
        display: block;
    }

    .sidebar-overlay.active {
        display: block;
    }

    .main-content {
        margin-left: 0;
        padding-top: var(--header-height);
    }

    .content-wrapper {
        padding: var(--spacing-lg);
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .data-flow {
        flex-direction: column;
        align-items: center;
    }

    .flow-arrow {
        transform: rotate(90deg);
        padding: var(--spacing-sm) 0;
    }

    .encryption-badge {
        flex-direction: column;
        text-align: center;
    }

    .encryption-icon {
        margin: 0 auto;
    }

    .security-feature {
        flex-direction: column;
        text-align: center;
    }

    .security-icon {
        margin: 0 auto;
    }
}

@media (max-width: 640px) {
    .feature-grid,
    .requirements-grid,
    .mode-cards,
    .best-practices,
    .support-options {
        grid-template-columns: 1fr;
    }

    .metrics-example {
        flex-direction: column;
    }

    .step {
        flex-direction: column;
    }

    .step-number {
        margin-bottom: var(--spacing-sm);
    }

    .callout {
        flex-direction: column;
    }

    .footer-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ========== PRINT STYLES ========== */
@media print {
    .sidebar,
    .mobile-header,
    .sidebar-overlay {
        display: none !important;
    }

    .main-content {
        margin-left: 0;
    }

    .content-wrapper {
        max-width: 100%;
        padding: 0;
    }
}