*, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        :root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #60a5fa;
            --color-primary-bg: rgba(37, 99, 235, 0.08);
            --color-primary-border: rgba(37, 99, 235, 0.15);
            --color-primary-focus: rgba(37, 99, 235, 0.12);
            
            --color-accent: #0ea5e9;
            --color-accent-2: #06b6d4;
            
            --color-bg: #f8fafc;
            --color-bg-elevated: #ffffff;
            --color-text: #0f172a;
            --color-text-secondary: #64748b;
            --color-text-tertiary: #94a3b8;
            --color-border: rgba(0, 0, 0, 0.06);
            --color-border-strong: rgba(0, 0, 0, 0.1);
            
            --glass-bg: rgba(255, 255, 255, 0.75);
            --glass-bg-strong: rgba(255, 255, 255, 0.92);
            
            --font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont, sans-serif;
            --sidebar-width: 360px;
            --header-height: 60px;
            
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }
        
        html.dark {
            --color-bg: #0f172a;
            --color-bg-elevated: #1e293b;
            --color-text: #f1f5f9;
            --color-text-secondary: #94a3b8;
            --color-text-tertiary: #64748b;
            --color-border: rgba(255, 255, 255, 0.08);
            --color-border-strong: rgba(255, 255, 255, 0.12);
            --glass-bg: rgba(30, 41, 59, 0.85);
            --glass-bg-strong: rgba(30, 41, 59, 0.95);
            --color-primary-bg: rgba(37, 99, 235, 0.15);
            --color-primary-border: rgba(37, 99, 235, 0.25);
            --color-primary-focus: rgba(37, 99, 235, 0.2);
        }
        
        html {
            scrollbar-width: none;
        }
        html::-webkit-scrollbar {
            display: none;
        }
        
        body {
            font-family: var(--font-family);
            color: var(--color-text);
            line-height: 1.5;
            -webkit-font-smoothing: antialiased;
            min-height: 100vh;
            transition: background-color 0.3s, color 0.3s;
            
            background: 
                radial-gradient(ellipse at 0% 0%, rgba(37, 99, 235, 0.12) 0%, transparent 50%),
                radial-gradient(ellipse at 100% 0%, rgba(14, 165, 233, 0.1) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
                var(--color-bg);
            background-attachment: fixed;
        }
        
        html.dark body {
            background: 
                radial-gradient(ellipse at 0% 0%, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
                radial-gradient(ellipse at 100% 0%, rgba(14, 165, 233, 0.15) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 40%),
                var(--color-bg);
        }
        
        /* ヘッダー */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--glass-bg);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            border-bottom: 1px solid var(--color-border);
            z-index: 1000;
            transition: background-color 0.3s;
        }
        
        .header-inner {
            height: 100%;
            padding: 0 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--color-text);
        }
        
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 800;
            font-size: 1rem;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        
        .logo-text {
            display: flex;
            align-items: baseline;
            gap: 5px;
        }
        
        .logo-main {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        
        .logo-sub {
            font-size: 0.8125rem;
            font-weight: 500;
            color: var(--color-text-secondary);
        }
        
        .header-search {
            flex: 1;
            max-width: 480px;
            position: relative;
        }
        
        .header-search input {
            width: 100%;
            padding: 12px 18px 12px 46px;
            font-size: 0.9375rem;
            font-family: var(--font-family);
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            color: var(--color-text);
            transition: all 0.2s;
        }
        
        .header-search input:focus {
            outline: none;
            border-color: var(--color-primary-border);
            box-shadow: 0 0 0 3px var(--color-primary-focus), 0 2px 8px rgba(0, 0, 0, 0.04);
        }
        
        .header-search input::placeholder {
            color: var(--color-text-tertiary);
        }
        
        .header-search-icon {
            position: absolute;
            left: 16px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-tertiary);
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .header-btn {
            padding: 10px 16px;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            text-decoration: none;
            border-radius: var(--radius-sm);
            transition: all 0.15s;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .header-btn:hover {
            color: var(--color-text);
            background: var(--color-primary-bg);
        }
        
        .theme-toggle {
            width: 42px;
            height: 42px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: none;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            color: var(--color-text-secondary);
            cursor: pointer;
            transition: all 0.2s;
        }
        
        .theme-toggle:hover {
            color: var(--color-text);
            background: var(--color-primary-bg);
            border-color: var(--color-primary);
        }
        
        .theme-toggle .icon-sun { display: none; }
        .theme-toggle .icon-moon { display: block; }
        html.dark .theme-toggle .icon-sun { display: block; }
        html.dark .theme-toggle .icon-moon { display: none; }
        
        /* レイアウト */
        .layout {
            display: flex;
            padding-top: var(--header-height);
            min-height: 100vh;
        }
        
        .main {
            flex: 1;
            padding: 32px 40px;
            padding-right: calc(var(--sidebar-width) + 48px);
        }
        
        .sidebar {
            position: fixed;
            top: var(--header-height);
            right: 0;
            bottom: 0;
            width: var(--sidebar-width);
            background: var(--glass-bg-strong);
            backdrop-filter: saturate(180%) blur(20px);
            -webkit-backdrop-filter: saturate(180%) blur(20px);
            border-left: 1px solid var(--color-border);
            padding: 24px;
            overflow-y: auto;
            transition: background-color 0.3s;
            scrollbar-width: none;
        }
        .sidebar::-webkit-scrollbar {
            display: none;
        }
        
        .sidebar-section {
            margin-bottom: 32px;
        }
        
        .sidebar-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 12px;
            padding: 0 4px;
        }
        
        .sidebar-title {
            font-size: 0.6875rem;
            font-weight: 700;
            color: var(--color-text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
        }
        
        .sidebar-more {
            font-size: 0.75rem;
            color: var(--color-primary);
            text-decoration: none;
            font-weight: 500;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background 0.15s;
        }
        
        .sidebar-more:hover {
            background: var(--color-primary-bg);
        }
        
        .sidebar-list {
            list-style: none;
        }
        
        .sidebar-item {
            margin-bottom: 4px;
        }
        
        .sidebar-link {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 12px;
            font-size: 0.875rem;
            color: var(--color-text);
            text-decoration: none;
            border-radius: var(--radius-md);
            transition: all 0.15s;
        }
        
        .sidebar-link:hover {
            background: var(--color-primary-bg);
        }
        
        .sidebar-link.active {
            background: var(--color-bg-elevated);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
        }
        
        .sidebar-icon {
            width: 34px;
            height: 34px;
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-text-secondary);
            flex-shrink: 0;
            transition: all 0.15s;
        }
        
        .sidebar-link.active .sidebar-icon {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            border-color: transparent;
            color: white;
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
        }
        
        .sidebar-link-text {
            flex: 1;
            font-weight: 500;
        }
        
        .sidebar-count {
            font-size: 0.75rem;
            color: var(--color-text-tertiary);
            background: var(--color-border);
            padding: 2px 8px;
            border-radius: 10px;
        }
        
        .sidebar-ad {
            margin-top: 24px;
            display: flex;
            justify-content: center;
        }
        
        .sidebar-ad-placeholder {
            background: var(--color-border);
            border-radius: var(--radius-md);
            width: 300px;
            height: 250px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--color-text-tertiary);
        }
        
        /* ========================================
           ヒーロー
           ======================================== */
        .hero {
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 48px;
            margin-bottom: 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: radial-gradient(ellipse, var(--color-primary-bg) 0%, transparent 70%);
            pointer-events: none;
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
        }
        
        .hero-main {
            margin-bottom: 28px;
        }
        
        .hero-tagline {
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--color-primary);
            letter-spacing: 0.05em;
            margin-bottom: 12px;
        }
        
        .hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        
        .hero h1 .gradient {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .hero-subtitle {
            font-size: 1.0625rem;
            color: var(--color-text-secondary);
            max-width: 580px;
            margin: 0 auto;
            line-height: 1.7;
        }
        
        .hero-search {
            max-width: 520px;
            margin: 28px auto 0;
            position: relative;
        }
        
        .hero-search input {
            width: 100%;
            padding: 16px 24px 16px 52px;
            font-size: 1rem;
            font-family: var(--font-family);
            background: var(--color-bg);
            border: 1px solid var(--color-border-strong);
            border-radius: var(--radius-lg);
            color: var(--color-text);
            transition: all 0.2s;
        }
        
        .hero-search input:focus {
            outline: none;
            border-color: var(--color-primary-border);
            box-shadow: 0 0 0 3px var(--color-primary-focus), 0 4px 16px rgba(0, 0, 0, 0.06);
            background: var(--color-bg-elevated);
        }
        
        .hero-search input::placeholder {
            color: var(--color-text-tertiary);
        }
        
        .hero-search-icon {
            position: absolute;
            left: 18px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--color-text-tertiary);
        }
        
        .hero-keywords {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 8px;
            margin-top: 20px;
        }
        
        .hero-keyword {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 6px 12px;
            font-size: 0.8125rem;
            color: var(--color-text-secondary);
            background: var(--color-bg);
            border: 1px solid var(--color-border);
            border-radius: 20px;
            text-decoration: none;
            transition: all 0.15s;
        }
        
        .hero-keyword:hover {
            color: var(--color-primary);
            border-color: var(--color-primary-border);
            background: var(--color-primary-bg);
        }
        
        /* セクション */
        .section {
            margin-bottom: 48px;
        }
        
        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
        }
        
        .section-title {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.02em;
        }
        
        .section-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 18px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-bg);
            border: 1px solid var(--color-primary-border);
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: all 0.2s;
        }
        
        .section-btn:hover {
            background: var(--color-primary);
            color: white;
            border-color: var(--color-primary);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
            transform: translateY(-1px);
        }
        
        .section-btn svg {
            transition: transform 0.2s;
        }
        
        .section-btn:hover svg {
            transform: translateX(3px);
        }
        
        /* カテゴリカード */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 16px;
        }
        
        .category-card {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 18px 20px;
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            text-decoration: none;
            color: var(--color-text);
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .category-card:hover {
            border-color: var(--color-primary-border);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.1);
            transform: translateY(-3px);
        }
        
        .category-icon {
            width: 48px;
            height: 48px;
            background: var(--color-primary-bg);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--color-primary);
            transition: all 0.25s;
        }
        
        .category-card:hover .category-icon {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        
        .category-info h3 {
            font-size: 0.9375rem;
            font-weight: 600;
        }
        
        .category-info span {
            font-size: 0.8125rem;
            color: var(--color-text-tertiary);
        }
        
        /* ツールカード */
        .tools-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 20px;
        }
        
        .tool-card {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 24px;
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            text-decoration: none;
            color: var(--color-text);
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .tool-card:hover {
            border-color: var(--color-primary-border);
            box-shadow: 0 12px 32px rgba(37, 99, 235, 0.1);
            transform: translateY(-4px);
        }
        
        .tool-icon {
            width: 52px;
            height: 52px;
            background: var(--color-primary-bg);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: var(--color-primary);
            transition: all 0.25s;
        }
        
        .tool-card:hover .tool-icon {
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            color: white;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        
        .tool-content {
            flex: 1;
            min-width: 0;
        }
        
        .tool-content h3 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 6px;
        }
        
        .tool-content p {
            font-size: 0.875rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
        }
        
        /* 広告 */
        .ad-container {
            display: flex;
            justify-content: center;
            margin: 40px 0;
        }
        
        .ad-placeholder {
            background: var(--color-border);
            border-radius: var(--radius-md);
            width: 728px;
            max-width: 100%;
            height: 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            color: var(--color-text-tertiary);
        }
        
        /* フッター */
        .footer {
            background: var(--color-bg-elevated);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-xl);
            padding: 64px 48px 40px;
            margin-top: 64px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr repeat(4, 1fr);
            gap: 48px;
            margin-bottom: 48px;
        }
        
        .footer-brand {
            max-width: 280px;
        }
        
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        
        .footer-logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 800;
            font-size: 1rem;
        }
        
        .footer-logo-text {
            display: flex;
            align-items: baseline;
            gap: 5px;
        }
        
        .footer-logo-main {
            font-size: 1.125rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }
        
        .footer-logo-sub {
            font-size: 0.75rem;
            font-weight: 500;
            color: var(--color-text-secondary);
        }
        
        .footer-brand p {
            font-size: 0.9375rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
        }
        
        .footer-section h4 {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 20px;
        }
        
        .footer-section ul {
            list-style: none;
        }
        
        .footer-section li {
            margin-bottom: 14px;
        }
        
        .footer-section a {
            font-size: 0.9375rem;
            color: var(--color-text);
            text-decoration: none;
            transition: color 0.15s;
        }
        
        .footer-section a:hover {
            color: var(--color-primary);
        }
        
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 32px;
            border-top: 1px solid var(--color-border);
            font-size: 0.8125rem;
            color: var(--color-text-tertiary);
        }
        
        .footer-links {
            display: flex;
            gap: 24px;
        }
        
        .footer-links a {
            color: var(--color-text-tertiary);
            text-decoration: none;
        }
        
        .footer-links a:hover {
            color: var(--color-text);
        }
        
        /* レスポンシブ */
        @media (max-width: 1200px) {
            :root {
                --sidebar-width: 340px;
            }
        }
        
        @media (max-width: 1024px) {
            .sidebar {
                display: none;
            }
            
            .main {
                padding-right: 40px;
            }
            
            .footer-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            
            .footer-brand {
                grid-column: span 3;
                max-width: none;
                margin-bottom: 16px;
            }
        }
        
        @media (max-width: 768px) {
            .header-search {
                display: none;
            }
            
            .header-btn span {
                display: none;
            }
            
            .main {
                padding: 24px 20px;
            }
            
            .hero {
                padding: 32px 24px;
            }
            
            .hero h1 {
                font-size: 1.75rem;
            }
            
            .hero-subtitle {
                font-size: 0.9375rem;
            }
            
            .categories-grid {
                grid-template-columns: 1fr;
            }
            
            .tools-grid {
                grid-template-columns: 1fr;
            }
            
            .ad-placeholder {
                width: 100%;
                height: 100px;
            }
            
            .footer {
                padding: 40px 24px 32px;
            }
            
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            
            .footer-brand {
                grid-column: span 2;
            }
            
            .footer-bottom {
                flex-direction: column;
                gap: 16px;
                text-align: center;
            }
        }
        
        @media (max-width: 480px) {
            .hero-keywords {
                gap: 6px;
            }
            
            .hero-keyword {
                padding: 5px 10px;
                font-size: 0.75rem;
            }
            
            .footer-grid {
                grid-template-columns: 1fr;
            }
            
            .footer-brand {
                grid-column: span 1;
            }
        }

/* ===========================================
   Tool Pages
   =========================================== */

/* Tool Header */
.tool-header {
    margin-bottom: 32px;
}

.tool-header-content {
    max-width: 700px;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8125rem;
    color: var(--color-text-tertiary);
    margin-bottom: 16px;
}

.breadcrumb a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color 0.15s;
}

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

.breadcrumb-sep {
    color: var(--color-text-tertiary);
}

.tool-header h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.tool-description {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Tool Container */
.tool-container {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 32px;
    margin-bottom: 40px;
}

.tool-main {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.tool-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Tool Card */
.tool-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.tool-input-card {
    padding: 20px;
}

.tool-card-header {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    margin-bottom: 16px;
}

.tool-card-actions {
    display: flex;
    gap: 8px;
}

.tool-card-title {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.tool-card-text {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Tool Textarea */
.tool-textarea {
    width: 100%;
    min-height: 280px;
    padding: 20px;
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.tool-textarea:focus {
    outline: none;
    border-color: var(--color-primary-border);
    box-shadow: 0 0 0 3px var(--color-primary-focus);
}

.tool-textarea::placeholder {
    color: var(--color-text-tertiary);
}

/* Tool Buttons */
.tool-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-family: var(--font-family);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.15s;
}

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

.tool-btn-primary:hover {
    background: var(--color-primary-dark);
}

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

.tool-btn-secondary:hover {
    color: var(--color-text);
    background: var(--color-primary-bg);
    border-color: var(--color-primary-border);
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 16px;
}

.stat-card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: center;
    transition: all 0.2s;
}

.stat-card:hover {
    border-color: var(--color-primary-border);
}

.stat-card.stat-primary {
    background: var(--color-primary-bg);
    border-color: var(--color-primary-border);
}

.stat-card.stat-primary .stat-value {
    color: var(--color-primary);
}

.stat-value {
    display: block;
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--color-text);
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Feature List */
.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.feature-list li {
    display: flex;
    gap: 12px;
}

.feature-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.feature-list li div {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.feature-list li strong {
    font-size: 0.875rem;
    font-weight: 600;
}

.feature-list li span {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* Use Case List */
.usecase-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.usecase-list li {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    padding-left: 20px;
    position: relative;
}

.usecase-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: 600;
}

/* Tool Ad */
.tool-ad {
    margin-top: auto;
}

/* Responsive - Tool Pages */
@media (max-width: 1200px) {
    .tool-container {
        grid-template-columns: 1fr 280px;
    }
}

@media (max-width: 1024px) {
    .tool-container {
        grid-template-columns: 1fr;
    }
    
    .tool-sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .tool-ad {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .tool-header h1 {
        font-size: 1.5rem;
    }
    
    .tool-description {
        font-size: 0.9375rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tool-sidebar {
        grid-template-columns: 1fr;
    }
    
    .tool-ad {
        grid-column: span 1;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px 12px;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.6875rem;
    }
}