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

:root, [data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --bg-card: #1c1c1e;
    --bg-input: #2c2c2e;
    --bg-hover: #3a3a3c;
    --text-primary: #ffffff;
    --text-secondary: #98989d;
    --text-tertiary: #636366;
    --text-accent: #0a84ff;
    --border-color: #38383a;
    --border-light: #2c2c2e;
    --header-bg: rgba(0, 0, 0, 0.72);
    --cookie-bg: rgba(28, 28, 30, 0.95);
    --accent-blue: #0a84ff;
    --accent-green: #30d158;
    --accent-red: #ff453a;
    --accent-orange: #ff9f0a;
    --accent-purple: #bf5af2;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --font-system: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', SFMono-Regular, 'Courier New', monospace;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.5);
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
}

[data-theme="light"] {
    --bg-primary: #f5f5f7;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8ed;
    --bg-card: #ffffff;
    --bg-input: #f2f2f7;
    --bg-hover: #d1d1d6;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-tertiary: #86868b;
    --text-accent: #0071e3;
    --border-color: #d2d2d7;
    --border-light: #e5e5ea;
    --header-bg: rgba(255, 255, 255, 0.72);
    --cookie-bg: rgba(255, 255, 255, 0.95);
    --accent-blue: #0071e3;
    --accent-green: #248a3d;
    --accent-red: #d70015;
    --accent-orange: #bf4800;
    --accent-purple: #8944ab;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
}

html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-system); background-color: var(--bg-primary); color: var(--text-primary); line-height: 1.5; min-height: 100vh; overflow-x: hidden; }
body.modal-open { overflow: hidden; }
button, .category-tab, .theme-btn, .lang-btn, .cookie-btn, .copy-btn, .footer-link-btn {
    -webkit-appearance: none;
    appearance: none;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}
.page-wrapper { min-height: 100vh; display: flex; flex-direction: column; }
.main-content { flex: 1; padding: 0 var(--spacing-md); max-width: 1200px; width: 100%; margin: 0 auto; }

.site-header { position: sticky; top: 0; z-index: 100; background: var(--header-bg); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--border-light); }
.header-inner { max-width: 1200px; margin: 0 auto; padding: var(--spacing-sm) var(--spacing-md); display: flex; align-items: center; justify-content: space-between; height: 52px; }
.logo { display: flex; align-items: center; gap: var(--spacing-sm); text-decoration: none; color: var(--text-primary); font-weight: 600; font-size: 1.1rem; letter-spacing: -0.02em; }
.logo-icon { font-size: 1.2rem; color: var(--accent-blue); }
.header-nav { display: flex; align-items: center; gap: var(--spacing-sm); }
.theme-btn, .lang-btn { background: var(--bg-tertiary); border: 1px solid var(--border-color); color: var(--text-primary); padding: 6px 12px; border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 500; cursor: pointer; transition: all var(--transition-fast); font-family: var(--font-system); line-height: 1; min-width: 36px; min-height: 36px; display: inline-flex; align-items: center; justify-content: center; }
.theme-btn:hover, .lang-btn:hover { background: var(--bg-hover); border-color: var(--text-secondary); }
.theme-btn:active, .lang-btn:active, .category-tab:active { transform: scale(0.96); }
.lang-current { font-weight: 600; }
.theme-icon-label { font-size: 1rem; line-height: 1; pointer-events: none; }

.site-footer { border-top: 1px solid var(--border-light); padding: var(--spacing-lg) var(--spacing-md); margin-top: auto; }
.footer-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
.footer-links { margin-bottom: var(--spacing-sm); display: flex; align-items: center; justify-content: center; gap: var(--spacing-sm); flex-wrap: wrap; }
.footer-links a, .footer-link-btn { color: var(--text-secondary); text-decoration: none; font-size: 0.85rem; transition: color var(--transition-fast); background: none; border: none; cursor: pointer; font-family: var(--font-system); padding: 0; }
.footer-links a:hover, .footer-link-btn:hover { color: var(--accent-blue); }
.footer-sep { color: var(--text-tertiary); font-size: 0.85rem; }
.footer-text { color: var(--text-tertiary); font-size: 0.8rem; }

.category-tabs { display: flex; gap: var(--spacing-sm); flex-wrap: nowrap; justify-content: flex-start; margin-bottom: var(--spacing-xl); padding: 0 var(--spacing-sm) var(--spacing-xs); overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.category-tabs::-webkit-scrollbar { display: none; }
.category-tab { padding: 10px 18px; border-radius: var(--radius-xl); border: 1px solid var(--border-color); background: var(--bg-tertiary); color: var(--text-primary); font-size: 0.9rem; font-weight: 500; cursor: pointer; transition: all var(--transition-fast); font-family: var(--font-system); flex-shrink: 0; min-height: 40px; }
.category-tab:hover { background: var(--bg-hover); }
.category-tab.active { background: var(--accent-blue); color: #ffffff; border-color: var(--accent-blue); }
.tools-section { margin-bottom: var(--spacing-2xl); }
.tools-empty { text-align: center; color: var(--text-secondary); padding: var(--spacing-xl); }

.static-page { max-width: 720px; margin: 0 auto; padding: var(--spacing-xl) 0 var(--spacing-2xl); }
.static-page-title { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--spacing-sm); }
.static-page-meta { color: var(--text-tertiary); font-size: 0.85rem; margin-bottom: var(--spacing-xl); }
.static-page-content { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: var(--spacing-xl); line-height: 1.7; color: var(--text-secondary); }
.static-page-content h2 { color: var(--text-primary); font-size: 1.1rem; margin: var(--spacing-lg) 0 var(--spacing-sm); }
.static-page-content h2:first-child { margin-top: 0; }
.static-page-content p { margin-bottom: var(--spacing-md); }
.static-page-content ul { margin: 0 0 var(--spacing-md) var(--spacing-lg); }
.static-page-content li { margin-bottom: var(--spacing-xs); }
.contact-email-box { text-align: center; padding: var(--spacing-xl); background: var(--bg-tertiary); border-radius: var(--radius-md); margin-top: var(--spacing-lg); }
.contact-email-box a { color: var(--accent-blue); font-size: 1.1rem; font-weight: 600; text-decoration: none; }
.contact-email-box a:hover { text-decoration: underline; }

.contact-modal { position: fixed; inset: 0; z-index: 2000; display: none; align-items: center; justify-content: center; padding: var(--spacing-md); }
.contact-modal.is-open { display: flex; }
.contact-modal-backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px); }
.contact-modal-bubble { position: relative; z-index: 1; width: min(360px, 100%); background: var(--bg-card); border: 1px solid var(--border-color); border-radius: var(--radius-lg); padding: var(--spacing-xl); box-shadow: var(--shadow-lg); text-align: center; animation: modalPop 0.2s ease; }
@keyframes modalPop { from { opacity: 0; transform: scale(0.95) translateY(8px); } to { opacity: 1; transform: scale(1) translateY(0); } }
.contact-modal-bubble h3 { font-size: 1.2rem; margin-bottom: var(--spacing-sm); color: var(--text-primary); }
.contact-modal-desc { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: var(--spacing-md); line-height: 1.5; }
.contact-modal-email { background: var(--bg-tertiary); border: 1px solid var(--border-light); border-radius: var(--radius-md); padding: 14px; font-size: 0.95rem; font-weight: 600; color: var(--accent-blue); word-break: break-all; margin-bottom: var(--spacing-lg); user-select: all; -webkit-user-select: all; }
.contact-modal-actions { display: flex; gap: var(--spacing-sm); justify-content: center; flex-wrap: wrap; }

.hero-section { padding: var(--spacing-2xl) 0 var(--spacing-xl); text-align: center; }
.hero-title { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; letter-spacing: -0.03em; line-height: 1.1; margin-bottom: var(--spacing-md); background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 500px; margin: 0 auto var(--spacing-xl); }

.search-container { max-width: 600px; margin: 0 auto var(--spacing-2xl); position: relative; }
.search-input { width: 100%; padding: 14px 20px 14px 48px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius-xl); color: var(--text-primary); font-size: 1rem; font-family: var(--font-system); transition: all var(--transition-fast); outline: none; }
.search-input::placeholder { color: var(--text-tertiary); }
.search-input:focus { border-color: var(--accent-blue); background: var(--bg-secondary); box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.15); }
.search-icon { position: absolute; left: 18px; top: 50%; transform: translateY(-50%); color: var(--text-tertiary); font-size: 1.1rem; pointer-events: none; }

.category-section { margin-bottom: var(--spacing-2xl); }
.category-header { margin-bottom: var(--spacing-lg); padding-bottom: var(--spacing-md); border-bottom: 1px solid var(--border-light); }
.category-title { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: var(--spacing-xs); }
.category-desc { color: var(--text-secondary); font-size: 0.95rem; }

.tools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--spacing-md); }

.tool-card { display: flex; align-items: flex-start; gap: var(--spacing-md); padding: var(--spacing-lg); background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius-lg); text-decoration: none; color: var(--text-primary); transition: all var(--transition-normal); position: relative; overflow: hidden; }
.tool-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px; background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple)); opacity: 0; transition: opacity var(--transition-normal); }
.tool-card:hover { transform: translateY(-2px); border-color: var(--border-color); box-shadow: var(--shadow-md); }
.tool-card:hover::before { opacity: 1; }
.tool-card-icon { font-size: 1.8rem; line-height: 1; flex-shrink: 0; width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--bg-tertiary); border-radius: var(--radius-md); }
.tool-card-content { flex: 1; min-width: 0; }
.tool-card-name { font-size: 1.05rem; font-weight: 600; margin-bottom: var(--spacing-xs); letter-spacing: -0.01em; }
.tool-card-desc { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.tool-card-arrow { color: var(--text-tertiary); font-size: 1.2rem; transition: transform var(--transition-fast); flex-shrink: 0; align-self: center; }
.tool-card:hover .tool-card-arrow { transform: translateX(3px); color: var(--text-primary); }

.tool-page { max-width: 800px; margin: 0 auto; padding: var(--spacing-xl) 0 var(--spacing-2xl); }
.tool-page-header { margin-bottom: var(--spacing-xl); text-align: center; }
.tool-page-icon { font-size: 3rem; margin-bottom: var(--spacing-md); display: block; }
.tool-page-title { font-size: 2rem; font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--spacing-sm); }
.tool-page-desc { color: var(--text-secondary); font-size: 1rem; }

.tool-container { background: var(--bg-card); border: 1px solid var(--border-light); border-radius: var(--radius-lg); padding: var(--spacing-xl); margin-bottom: var(--spacing-lg); }

.tool-label { display: block; font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); margin-bottom: var(--spacing-sm); text-transform: uppercase; letter-spacing: 0.05em; }
.tool-textarea, .tool-input { width: 100%; padding: 14px 16px; background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-primary); font-size: 0.95rem; font-family: var(--font-mono); line-height: 1.5; resize: vertical; min-height: 120px; outline: none; transition: all var(--transition-fast); }
.tool-input { min-height: auto; font-family: var(--font-system); }
.tool-textarea:focus, .tool-input:focus { border-color: var(--accent-blue); box-shadow: 0 0 0 3px rgba(10, 132, 255, 0.15); }
.tool-textarea::placeholder, .tool-input::placeholder { color: var(--text-tertiary); }

.btn-group { display: flex; gap: var(--spacing-sm); flex-wrap: wrap; margin-top: var(--spacing-md); }
.btn-primary, .btn-secondary, .btn-ghost { padding: 10px 20px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all var(--transition-fast); border: none; font-family: var(--font-system); display: inline-flex; align-items: center; gap: var(--spacing-sm); }
.btn-primary { background: var(--accent-blue); color: #ffffff; }
.btn-primary:hover { background: #0066cc; transform: translateY(-1px); }
.btn-secondary { background: var(--bg-tertiary); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--bg-hover); }
.btn-ghost { background: transparent; color: var(--text-secondary); border: 1px solid transparent; }
.btn-ghost:hover { color: var(--text-primary); background: var(--bg-tertiary); }
.btn-primary:active, .btn-secondary:active, .btn-ghost:active { transform: scale(0.98); }

.tool-output { margin-top: var(--spacing-lg); position: relative; }
.tool-output-hidden { display: none !important; }
.tool-output-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: var(--spacing-sm); }
.tool-output-label { font-size: 0.85rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
.tool-output-actions { display: flex; gap: var(--spacing-xs); }
.tool-output-area { width: 100%; padding: 14px 16px; background: var(--bg-input); border: 1px solid var(--border-color); border-radius: var(--radius-md); color: var(--text-primary); font-size: 0.9rem; font-family: var(--font-mono); line-height: 1.5; min-height: 120px; word-break: break-all; white-space: pre-wrap; overflow-x: auto; }
.tool-output-area.tool-result-rich { font-family: var(--font-system); white-space: normal; overflow: visible; min-height: 60px; word-break: normal; }
.tool-output-area:empty::before { content: attr(data-placeholder); color: var(--text-tertiary); }
.tool-output-area.error { border-color: var(--accent-red); color: var(--accent-red); }
.tool-output-area.success { border-color: var(--accent-green); }

.copy-btn { padding: 6px 12px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius-sm); color: var(--text-secondary); font-size: 0.8rem; cursor: pointer; transition: all var(--transition-fast); font-family: var(--font-system); }
.copy-btn:hover { background: var(--bg-hover); color: var(--text-primary); }
.copy-btn.copied { background: var(--accent-green); color: #000; border-color: var(--accent-green); }

.tool-options { display: flex; gap: var(--spacing-lg); margin-bottom: var(--spacing-lg); flex-wrap: wrap; }
.option-group { display: flex; align-items: center; gap: var(--spacing-sm); }
.option-label { font-size: 0.85rem; color: var(--text-secondary); }
.option-select { padding: 8px 12px; background: var(--bg-tertiary); border: 1px solid var(--border-color); border-radius: var(--radius-sm); color: var(--text-primary); font-size: 0.85rem; font-family: var(--font-system); cursor: pointer; outline: none; }
.option-select:focus { border-color: var(--accent-blue); }

.checkbox-label { display: flex; align-items: center; gap: var(--spacing-sm); cursor: pointer; font-size: 0.85rem; color: var(--text-secondary); }
.checkbox-label input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent-blue); cursor: pointer; }

.cookie-consent { position: fixed; bottom: 0; left: 0; right: 0; z-index: 1000; background: var(--cookie-bg); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px); border-top: 1px solid var(--border-color); padding: var(--spacing-md); }
.cookie-consent-inner { max-width: 800px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; gap: var(--spacing-lg); flex-wrap: wrap; }
.cookie-consent-content h4 { font-size: 1rem; margin-bottom: var(--spacing-xs); font-weight: 600; }
.cookie-consent-content p { font-size: 0.85rem; color: var(--text-secondary); line-height: 1.4; }
.cookie-consent-actions { display: flex; gap: var(--spacing-sm); flex-shrink: 0; }
.cookie-btn { padding: 10px 20px; border-radius: var(--radius-sm); font-size: 0.9rem; font-weight: 600; cursor: pointer; transition: all var(--transition-fast); border: none; font-family: var(--font-system); }
.cookie-btn-accept { background: var(--accent-blue); color: #ffffff; }
.cookie-btn-accept:hover { background: #0066cc; }
.cookie-btn-decline { background: transparent; color: var(--text-secondary); border: 1px solid var(--border-color); }
.cookie-btn-decline:hover { background: var(--bg-tertiary); color: var(--text-primary); }

.error-page { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--spacing-2xl) var(--spacing-md); text-align: center; min-height: 60vh; }
.error-code { font-size: 6rem; font-weight: 700; color: var(--text-tertiary); line-height: 1; margin-bottom: var(--spacing-md); letter-spacing: -0.05em; }
.error-title { font-size: 1.5rem; font-weight: 600; margin-bottom: var(--spacing-xl); color: var(--text-secondary); }

.hidden { display: none !important; }
.text-center { text-align: center; }

@media (max-width: 768px) {
    .header-inner { padding: var(--spacing-sm) var(--spacing-md); }
    .hero-section { padding: var(--spacing-xl) 0 var(--spacing-lg); }
    .hero-title { font-size: 2rem; }
    .tools-grid { grid-template-columns: 1fr; }
    .tool-card { padding: var(--spacing-md); }
    .tool-container { padding: var(--spacing-md); }
    .tool-page { padding: var(--spacing-lg) 0 var(--spacing-xl); }
    .tool-page-title { font-size: 1.5rem; }
    .cookie-consent-inner { flex-direction: column; text-align: center; }
    .btn-group { justify-content: stretch; }
    .btn-primary, .btn-secondary, .btn-ghost { flex: 1 1 auto; justify-content: center; min-height: 44px; }
    .category-tabs { margin-left: calc(-1 * var(--spacing-sm)); margin-right: calc(-1 * var(--spacing-sm)); padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
}

@media (max-width: 480px) {
    .main-content { padding: 0 var(--spacing-sm); }
    .search-input { padding: 12px 16px 12px 40px; }
    .tool-textarea, .tool-input { padding: 12px; font-size: 0.9rem; }
}

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }
::selection { background: rgba(10, 132, 255, 0.3); color: var(--text-primary); }