/* ============================================
   易玩小工具箱 — 简约风格 v4.0
   Aesthetic: Clean · Minimal · Functional
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Fredoka:wght@300;400;500;600;700&family=Nunito:wght@400;500;600;700;800;900&family=Noto+Sans+SC:wght@400;500;700&display=swap');

:root {
  --bg-base: #f8f9fa;
  --bg-surface: #ffffff;
  --bg-hover: #f1f3f4;
  --border-subtle: #e1e3e6;
  --border-mid: #d1d3d6;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-muted: #9aa0a6;
  --text-accent: #1a73e8;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-card: 0 2px 6px rgba(0,0,0,0.08);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.12);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-pill: 100px;
  --font-display: 'Fredoka','Noto Sans SC',sans-serif;
  --font-body: 'Nunito','Noto Sans SC',sans-serif;
  --font-mono: 'Courier New',monospace;
  --transition: all 0.2s ease;
}

[data-theme="dark"] {
  --bg-base: #121212;
  --bg-surface: #1e1e1e;
  --bg-hover: #2d2d2d;
  --border-subtle: #333333;
  --border-mid: #444444;
  --text-primary: #e8eaed;
  --text-secondary: #9aa0a6;
  --text-muted: #5f6368;
  --text-accent: #8ab4f8;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-card: 0 2px 6px rgba(0,0,0,0.4);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.5);
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{background:var(--bg-base);color:var(--text-primary);font-family:var(--font-body);line-height:1.6;min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased;transition:background .35s,color .35s}
::-webkit-scrollbar{width:7px;height:7px}
::-webkit-scrollbar-thumb{background:var(--text-muted);border-radius:100px}
::selection{background:rgba(26,115,232,0.2);color:var(--text-primary)}
:focus-visible{outline:3px solid var(--text-accent);outline-offset:2px;border-radius:var(--radius-sm)}
.skip-link{position:absolute;top:-100px;left:16px;background:var(--text-accent);color:white;padding:8px 16px;border-radius:var(--radius-sm);z-index:9999;font-size:13px;text-decoration:none;transition:top .2s}
.skip-link:focus{top:16px}

/* Header */
.site-header{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);padding:12px 0;position:sticky;top:0;z-index:100}
.header-container{max-width:1200px;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.header-logo{display:flex;align-items:center}
.logo-mark{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--text-primary)}
.logo-icon svg{width:28px;height:28px}
.logo-text{font-size:16px;font-weight:700;font-family:var(--font-display);color:var(--text-primary)}

.header-search{flex:1;max-width:400px}
.search-input-wrap{position:relative;display:flex;align-items:center;background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-pill);padding:0 16px;transition:var(--transition)}
.search-input-wrap:focus-within{border-color:var(--text-accent);box-shadow:0 0 0 2px rgba(26,115,232,0.1)}
.search-icon{color:var(--text-muted);font-size:14px;margin-right:8px}
.search-input-wrap input{flex:1;background:transparent;border:none;outline:none;color:var(--text-primary);font-size:14px;padding:10px 0;font-family:var(--font-body)}
.search-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:4px;transition:var(--transition)}
.search-btn:hover{color:var(--text-accent)}

.header-actions{display:flex;align-items:center;gap:12px}
.theme-toggle,
.lang-toggle{background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:8px 12px;color:var(--text-secondary);cursor:pointer;transition:var(--transition);font-size:14px;font-family:var(--font-body);font-weight:500}
.theme-toggle:hover,
.lang-toggle:hover{background:var(--bg-surface);border-color:var(--border-mid)}

/* Main Content */
.main-content{min-height:calc(100vh - 64px)}
.content-container{max-width:1200px;margin:0 auto;padding:40px 24px}

.content-header{text-align:center;margin-bottom:40px}
.content-header h1{font-size:32px;font-weight:700;color:var(--text-primary);margin-bottom:12px;font-family:var(--font-display)}
.content-header p{font-size:16px;color:var(--text-secondary);margin-bottom:24px}
.content-header .highlight{color:var(--text-accent);font-weight:700}

.header-search-main{max-width:600px;margin:0 auto}
.header-search-main .search-input-wrap{background:var(--bg-surface);border:2px solid var(--border-subtle);border-radius:var(--radius-pill);padding:0 20px}
.header-search-main .search-input-wrap input{font-size:16px;padding:12px 0}

/* Filter Bar */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-bottom:32px;padding:16px 0;border-bottom:1px solid var(--border-subtle)}
.filter-btn{padding:8px 16px;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-pill);color:var(--text-secondary);font-size:14px;font-family:var(--font-body);font-weight:500;cursor:pointer;transition:var(--transition);white-space:nowrap}
.filter-btn:hover{background:var(--bg-hover);border-color:var(--border-mid);color:var(--text-primary)}
.filter-btn.active{background:var(--text-accent);border-color:var(--text-accent);color:white}

/* Tools Grid */
.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-bottom:48px}

/* About Section */
.about-section{margin-bottom:32px;padding-top:24px;border-top:1px solid var(--border-subtle)}
.about-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px;margin-top:16px}
.about-card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px 12px;text-align:center;transition:var(--transition)}
.about-icon{font-size:24px;margin-bottom:8px;display:block;color:var(--text-accent)}
.about-card h3{font-size:14px;font-weight:600;margin-bottom:4px;color:var(--text-primary);font-family:var(--font-display)}
.about-card p{font-size:12px;color:var(--text-secondary);line-height:1.5}

/* Changelog */
.changelog-section{margin-bottom:32px;padding-top:24px;border-top:1px solid var(--border-subtle)}
.section-title-small{font-size:14px;font-weight:600;color:var(--text-secondary);font-family:var(--font-display);margin-bottom:12px}
.changelog-list{margin-top:12px;display:flex;flex-direction:column;gap:8px}
.changelog-item{display:flex;gap:12px;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:12px 16px;transition:var(--transition)}
.changelog-version{background:var(--text-accent);color:white;font-size:10px;font-weight:600;padding:3px 8px;border-radius:var(--radius-sm);height:fit-content;flex-shrink:0;font-family:var(--font-display)}
.changelog-date{font-size:11px;color:var(--text-muted);margin-bottom:4px}
.changelog-content ul{list-style:none}
.changelog-content li{font-size:12px;color:var(--text-secondary);padding:1px 0;font-weight:400}
.changelog-content li::before{content:'• '}

/* Disclaimer */
.disclaimer-section{margin-bottom:32px;padding-top:24px;border-top:1px solid var(--border-subtle)}
.disclaimer-content{display:flex;flex-direction:column;gap:12px;margin-top:12px}
.disclaimer-item{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px;transition:var(--transition)}
.disclaimer-item h3{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px;font-family:var(--font-display)}
.disclaimer-item p{font-size:13px;color:var(--text-secondary);line-height:1.6;font-weight:400}

/* Footer */
.site-footer{border-top:1px solid var(--border-subtle);padding-top:32px;text-align:center}
.footer-links{display:flex;justify-content:center;gap:16px;margin-bottom:16px;flex-wrap:wrap}
.footer-links a{color:var(--text-secondary);text-decoration:none;font-size:14px;font-weight:500;transition:var(--transition)}
.footer-links a:hover{color:var(--text-accent)}
.footer-links span{color:var(--text-muted)}
.footer-friends{font-size:13px;color:var(--text-muted);margin-bottom:16px;font-weight:500}
.footer-friends a{color:var(--text-secondary);text-decoration:none;margin:0 8px;transition:var(--transition);font-weight:500}
.footer-friends a:hover{color:var(--text-accent)}
.footer-copy{font-size:13px;color:var(--text-muted);line-height:2;font-weight:500}

/* Back to Top */
.back-top{position:fixed;bottom:32px;right:32px;width:48px;height:48px;background:var(--text-accent);color:white;border:2px solid var(--bg-surface);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;transform:translateY(12px) scale(0.8);transition:var(--transition);z-index:100;box-shadow:var(--shadow-card);font-size:20px}
.back-top.visible{opacity:1;transform:translateY(0) scale(1)}
.back-top:hover{transform:translateY(-4px) scale(1.1);box-shadow:var(--shadow-hover)}

/* Toast */
.toast{position:fixed;bottom:90px;left:50%;transform:translateX(-50%) translateY(20px) scale(.9);background:var(--text-primary);color:var(--bg-base);border-radius:var(--radius-pill);padding:10px 22px;font-size:14px;font-weight:700;opacity:0;pointer-events:none;transition:all .3s cubic-bezier(0.34,1.56,0.64,1);z-index:999;white-space:nowrap;box-shadow:var(--shadow-card)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0) scale(1)}

/* Share Modal */
.share-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.45);backdrop-filter:blur(6px);z-index:200;opacity:0;pointer-events:none;transition:opacity .25s}
.share-overlay.open{opacity:1;pointer-events:auto}
.share-modal{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%) scale(.8);width:min(500px,calc(100vw - 32px));max-height:80vh;overflow-y:auto;background:var(--bg-surface);border:1px solid var(--border-mid);border-radius:var(--radius-lg);padding:30px;z-index:201;opacity:0;pointer-events:none;transition:all .35s cubic-bezier(0.34,1.56,0.64,1);box-shadow:0 8px 32px rgba(0,0,0,0.2)}
.share-modal.open{opacity:1;pointer-events:auto;transform:translate(-50%,-50%) scale(1)}


.share-modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px}
.share-modal-header h3{font-size:18px;font-weight:700;color:var(--text-primary);font-family:var(--font-display)}
.share-close{background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:50%;color:var(--text-secondary);font-size:14px;cursor:pointer;width:32px;height:32px;display:flex;align-items:center;justify-content:center;transition:var(--transition)}
.share-close:hover{background:var(--bg-surface);border-color:var(--border-mid);color:var(--text-primary)}
.share-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px}
.share-btn{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 10px;background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-md);text-decoration:none;color:var(--text-secondary);font-size:12px;font-weight:600;cursor:pointer;transition:var(--transition);font-family:var(--font-body)}
.share-btn:hover{background:var(--bg-surface);border-color:var(--text-accent);color:var(--text-accent);transform:translateY(-2px)}
.share-icon{font-size:24px}
.share-url-wrap input{width:100%;background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:10px 14px;color:var(--text-secondary);font-size:13px;font-family:var(--font-mono);outline:none;transition:var(--transition)}
.share-url-wrap input:focus{border-color:var(--text-accent);box-shadow:0 0 0 2px rgba(26,115,232,0.1)}

/* About Content */
.about-content{margin-top:16px}
.about-content .about-grid{display:grid;grid-template-columns:1fr;gap:16px}
.about-content .about-card{background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:20px 16px;transition:var(--transition)}
.about-content .about-icon{font-size:28px;margin-bottom:12px;display:block;color:var(--text-accent)}
.about-content .about-card h3{font-size:16px;font-weight:600;margin-bottom:6px;color:var(--text-primary);font-family:var(--font-display)}
.about-content .about-card p{font-size:14px;color:var(--text-secondary);line-height:1.5}

/* Disclaimer Content */
.disclaimer-content{display:flex;flex-direction:column;gap:12px;margin-top:16px}
.disclaimer-item{background:var(--bg-hover);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:16px;transition:var(--transition)}
.disclaimer-item h3{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:8px;font-family:var(--font-display)}
.disclaimer-item p{font-size:13px;color:var(--text-secondary);line-height:1.6;font-weight:400}

/* Animations */
@keyframes bounceIn{from{opacity:0;transform:translateY(20px) scale(.95)}to{opacity:1;transform:translateY(0) scale(1)}}

/* Responsive */
@media(max-width:1200px){
  .tools-grid{grid-template-columns:repeat(3,1fr);gap:18px}
}

@media(max-width:900px){
  .tools-grid{grid-template-columns:repeat(2,1fr);gap:16px}
}

@media(max-width:1024px){
  .content-container{padding:32px 20px}
  .about-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
}

@media(max-width:768px){
  .header-container{padding:0 16px;gap:16px}
  .header-search{max-width:300px}
  .content-container{padding:24px 16px}
  .content-header h1{font-size:28px}
  .content-header p{font-size:14px}
  .header-search-main{max-width:400px}
  .filter-bar{gap:6px}
  .filter-btn{padding:6px 12px;font-size:13px}
}

@media(max-width:600px){
  .tools-grid{grid-template-columns:1fr;gap:12px}
}

@media(max-width:480px){
  .header-container{flex-wrap:wrap}
  .header-search{order:3;flex:1 1 100%;max-width:none}
  .content-header h1{font-size:24px}
  .about-grid{grid-template-columns:1fr}
  .footer-links{flex-direction:column;gap:8px}
  .footer-friends{font-size:12px}
  .footer-friends a{margin:0 4px}
}