/* ============================================
   アテナツール・アダルト版カスタム Documentation Site - Stylesheet
   Modern & Stylish Design
   ============================================ */

/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette - Matching tool design */
    --primary-start: #667eea;
    --primary-end: #764ba2;
    --dark-bg: #212529;
    --light-bg: #fafafa;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --success: #27ae60;
    --warning: #f39c12;
    --danger: #e74c3c;
    --info: #3498db;
    --border-color: #dee2e6;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.1);

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

    /* Typography */
    --font-family: 'Noto Sans JP', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.7;

    /* Layout */
    --sidebar-width: 280px;
    --header-height: 64px;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--light-bg);
    overflow-x: hidden;
}

/* ========== Layout ========== */
.doc-shell {
    display: flex;
    min-height: 100vh;
    position: relative;
    align-items: stretch;
    width: 100%;
}

/* Sidebar */
.doc-sidebar {
    background: linear-gradient(180deg, var(--primary-start) 0%, var(--primary-end) 100%);
    color: #ffffff;
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    transition: transform 0.3s ease;
}

/* Custom Scrollbar for Sidebar - Webkit browsers (Chrome, Safari, Edge) */
.doc-sidebar::-webkit-scrollbar {
    width: 8px;
}

.doc-sidebar::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.doc-sidebar::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    transition: background 0.2s ease;
}

.doc-sidebar::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.5);
}

/* Custom Scrollbar for Sidebar - Firefox */
.doc-sidebar {
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.3) rgba(255, 255, 255, 0.1);
}

.doc-sidebar-brand {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.doc-sidebar-brand h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-sidebar-brand p {
    font-size: 0.875rem;
    opacity: 0.9;
    line-height: 1.4;
}

/* Navigation */
.doc-nav {
    list-style: none;
}

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

.doc-nav-section-title {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-xs);
    padding: 0 var(--spacing-sm);
}

.doc-nav-list {
    list-style: none;
}

.doc-nav-item {
    margin-bottom: 2px;
}

.doc-nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.65rem var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.9rem;
}

.doc-nav-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    transform: translateX(4px);
}

.doc-nav-link.active {
    background-color: rgba(255, 255, 255, 0.25);
    color: #ffffff;
    font-weight: 600;
}

.doc-nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1em;
}

/* Main Content */
.doc-main {
    flex: 1;
    margin-left: 0;
    padding: var(--spacing-xl) var(--spacing-lg);
    max-width: 1200px;
    width: 100%;
}

/* Header */
.doc-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

.doc-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.doc-header-icon {
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.doc-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Breadcrumb */
.doc-breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.doc-breadcrumb a {
    color: var(--primary-start);
    text-decoration: none;
    transition: color 0.2s ease;
}

.doc-breadcrumb a:hover {
    color: var(--primary-end);
    text-decoration: underline;
}

.doc-breadcrumb-separator {
    color: var(--text-muted);
}

/* Content Sections */
.doc-section {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.doc-section h2 {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-start);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.doc-section h3 {
    font-size: 1.375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-md) 0 var(--spacing-sm);
}

.doc-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: var(--spacing-sm) 0;
}

.doc-section p {
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.doc-section ul,
.doc-section ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.doc-section li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.7;
}

/* Table of Contents (TOC) */
.doc-toc {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.doc-toc h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-toc ol,
.doc-toc ul {
    margin-bottom: 0;
    padding-left: var(--spacing-lg);
}

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

.doc-toc a {
    color: var(--primary-start);
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-block;
}

.doc-toc a:hover {
    color: var(--primary-end);
    transform: translateX(4px);
    text-decoration: none;
}

/* Alert Boxes */
.doc-alert {
    padding: var(--spacing-md);
    border-radius: 8px;
    margin-bottom: var(--spacing-md);
    border-left: 4px solid;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.doc-alert i {
    font-size: 1.25rem;
    margin-top: 2px;
}

.doc-alert-info {
    background-color: #e3f2fd;
    border-color: var(--info);
    color: #0d47a1;
}

.doc-alert-success {
    background-color: #e8f5e9;
    border-color: var(--success);
    color: #1b5e20;
}

.doc-alert-warning {
    background-color: #fff3e0;
    border-color: var(--warning);
    color: #e65100;
}

.doc-alert-danger {
    background-color: #ffebee;
    border-color: var(--danger);
    color: #b71c1c;
}

/* Code Blocks */
.doc-code {
    background-color: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-md);
    overflow-x: auto;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.doc-code-inline {
    background-color: #f8f9fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--danger);
}

/* Tables */
.doc-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-md);
    background-color: var(--card-bg);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.doc-table thead {
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
}

.doc-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    font-size: 0.9rem;
}

.doc-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.doc-table tr:last-child td {
    border-bottom: none;
}

.doc-table tr:hover {
    background-color: #f8f9fa;
}

/* Step Lists */
.doc-step-list {
    counter-reset: step-counter;
    list-style: none;
    padding-left: 0;
}

.doc-step-list li {
    counter-increment: step-counter;
    position: relative;
    padding-left: 3.5rem;
    margin-bottom: var(--spacing-lg);
}

.doc-step-list li::before {
    content: counter(step-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 2.5rem;
    height: 2.5rem;
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
}

.doc-step-list li strong {
    display: block;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
}

/* Cards Grid */
.doc-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.doc-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    transition: all 0.3s ease;
    text-decoration: none;
    color: var(--text-primary);
    display: block;
    box-shadow: var(--shadow-sm);
}

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

.doc-card-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

.doc-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.doc-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0;
    line-height: 1.6;
}

.doc-process-visual {
    width: 100%;
    max-width: 720px;
    margin: var(--spacing-md) auto var(--spacing-lg);
    display: block;
}

/* Diagram & process helpers for beginner-oriented visuals */
.diagram-caption {
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.doc-process-step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.doc-process-step .step-number {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}

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

.diagram-illustration {
    max-width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
}

.doc-feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
}

.doc-feature-panel {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.doc-feature-panel h3 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.doc-feature-panel ul {
    margin-bottom: 0;
}

/* Back to Top Button */
.doc-back-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
    border: none;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    z-index: 999;
}

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

.doc-back-to-top.show {
    display: flex;
}

/* ========== Step Box - Modern Card-based Steps ========== */
/* Used in optimization pages (optimizer.html, post-generator.html) */

.doc-step-box {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-left: 4px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.doc-step-box:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

/* Blue variant for regular steps */
.doc-step-box-blue {
    border-left-color: var(--info);
    background: linear-gradient(to right, rgba(52, 152, 219, 0.05) 0%, var(--card-bg) 30%);
}

/* Green variant for completion steps */
.doc-step-box-green {
    border-left-color: var(--success);
    background: linear-gradient(to right, rgba(39, 174, 96, 0.05) 0%, var(--card-bg) 30%);
}

/* Step number badge */
.doc-step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    flex-shrink: 0;
}

.doc-step-box-blue .doc-step-number {
    background: linear-gradient(135deg, #3498db, #2980b9);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.3);
}

.doc-step-box-green .doc-step-number {
    background: linear-gradient(135deg, #27ae60, #229954);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(39, 174, 96, 0.3);
}

/* Step content */
.doc-step-content {
    flex: 1;
}

.doc-step-content strong {
    display: block;
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.doc-step-content p {
    margin-bottom: 0;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Scenario headers */
.doc-scenario-header {
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 12px;
    margin: var(--spacing-lg) 0 var(--spacing-md);
    box-shadow: var(--shadow-md);
}

.doc-scenario-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.25);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-xs);
}

.doc-scenario-header h3 {
    margin: var(--spacing-xs) 0;
    font-size: 1.375rem;
    border-bottom: none;
    padding-bottom: 0;
}

.doc-scenario-header p {
    margin-bottom: 0;
    opacity: 0.95;
    line-height: 1.6;
    font-size: 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .doc-step-box {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .doc-step-number {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .doc-scenario-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

/* ========== Responsive Design ========== */
@media (max-width: 991px) {
    :root {
        --sidebar-width: min(85vw, 280px);
    }

    .doc-shell {
        align-items: stretch;
    }

    .doc-sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        overflow-y: auto;
        transform: translateX(-110%);
    }

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

    .doc-main {
        margin-left: 0;
        padding: var(--spacing-md);
    }

    .doc-header h1 {
        font-size: 1.75rem;
    }

    .doc-section {
        padding: var(--spacing-md);
    }

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

@media (max-width: 575px) {
    .doc-header h1 {
        font-size: 1.5rem;
    }

    .doc-section h2 {
        font-size: 1.375rem;
    }

    .doc-step-list li {
        padding-left: 3rem;
    }

    .doc-step-list li::before {
        width: 2rem;
        height: 2rem;
        font-size: 1rem;
    }
}

/* Mobile Menu Toggle */
.doc-menu-toggle {
    display: none;
    position: fixed;
    top: var(--spacing-md);
    left: var(--spacing-md);
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-start), var(--primary-end));
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 1.25rem;
    cursor: pointer;
    z-index: 1001;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.doc-menu-toggle:hover {
    transform: scale(1.05);
}

@media (max-width: 991px) {
    .doc-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .doc-main {
        padding-top: calc(48px + var(--spacing-lg));
    }
}

/* Sidebar Backdrop (Mobile) */
.doc-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 999;
}

@media (max-width: 991px) {
    .doc-sidebar-backdrop.show {
        display: block;
    }
}

/* Search Box */
.doc-search {
    margin-bottom: var(--spacing-md);
    position: relative;
}

.doc-search input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    background-color: rgba(255, 255, 255, 0.15);
    color: #ffffff;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.doc-search input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.doc-search input:focus {
    outline: none;
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
}

.doc-search i {
    position: absolute;
    left: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    color: rgba(255, 255, 255, 0.7);
}

/* Footer */
.doc-footer {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Utility Classes */
.text-muted {
    color: var(--text-muted);
}

.text-primary {
    color: var(--primary-start);
}

.text-success {
    color: var(--success);
}

.text-warning {
    color: var(--warning);
}

.text-danger {
    color: var(--danger);
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

/* ========== 特典リンクセクションのスタイル ========== */
.doc-special-links {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.doc-special-links .doc-nav-section-title {
    color: #ffd700;
    font-weight: 700;
    font-size: 0.85rem;
}

/* 特典リンクの強調スタイル */
.doc-nav-link-special {
    background-color: rgba(255, 255, 255, 0.1);
    font-weight: 600;
    position: relative;
    overflow: hidden;
}

.doc-nav-link-special:hover {
    background-color: rgba(255, 255, 255, 0.25);
    transform: translateX(6px);
}

/* 販売ページリンクの特別強調（ハイライト） */
.doc-nav-link-highlight {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.2), rgba(255, 165, 0, 0.2));
    border: 1px solid rgba(255, 215, 0, 0.4);
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.doc-nav-link-highlight:hover {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.3), rgba(255, 165, 0, 0.3));
    border-color: rgba(255, 215, 0, 0.6);
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.4);
}

/* アイコンのアニメーション */
.doc-nav-link-special i {
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}