:root { --bg: #0d1117; --card: #161b22; --border: #30363d; --text: #c9d1d9; --primary: #2f81f7; --success: #238636; --danger: #f85149; }
body { background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, sans-serif; margin: 0; line-height: 1.5; }
.navbar { background: var(--card); border-bottom: 1px solid var(--border); padding: 1rem 0; }
.nav-container { max-width: 1400px; margin: 0 auto; padding: 0 1rem; display: flex; justify-content: space-between; align-items: center; }
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { color: var(--text); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover, .nav-links a.active { color: var(--primary); }
.brand { font-weight: 800!important; color: var(--primary)!important; font-size: 1.2rem!important; margin-right: 1rem; }
.lang-switcher a { padding: 0.2rem 0.5rem; background: var(--bg); border: 1px solid var(--border); border-radius: 4px; font-size: 0.8rem; font-weight: bold; color: var(--text); text-decoration: none; margin-left: 0.5rem; }
.lang-switcher a:hover { border-color: var(--primary); color: #fff; }
.container { max-width: 1400px; margin: 2rem auto; padding: 0 1rem; }
.subtitle { color: #8b949e; font-size: 1.1rem; margin-bottom: 2rem; }
.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.tool-card { background: var(--card); border: 1px solid var(--border); padding: 1.5rem; border-radius: 8px; text-decoration: none; display: block; transition: border 0.2s; }
.tool-card:hover { border-color: var(--primary); }
.tool-card h3 { margin: 0 0 0.5rem; color: #fff; }
.tool-card p { margin: 0; color: #8b949e; font-size: 0.9rem; }
.tool-h1 { color: #fff; margin-bottom: 1.5rem; font-size: 1.8rem; }
.error-banner { background: rgba(248,81,73,0.1); border: 1px solid var(--danger); color: var(--danger); padding: 1rem; border-radius: 6px; margin-bottom: 1rem; font-family: monospace; }
.editor-grid { display: flex; flex-direction: column; gap: 1rem; border: 2px dashed transparent; border-radius: 8px; transition: border 0.2s; }
.panel { background: var(--card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; display: flex; flex-direction: column; }
.panel-header { display: flex; justify-content: space-between; align-items: center; padding: 0.5rem 1rem; background: #21262d; border-bottom: 1px solid var(--border); font-weight: bold; font-size: 0.85rem; }
.CodeMirror { height: 400px; font-family: 'JetBrains Mono', monospace; font-size: 14px; background: #0d1117!important; flex: 1; }
.toolbar { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 1rem; padding: 0.5rem 0; align-items: center; }
.btn-group { display: flex; gap: 0.5rem; align-items: center; }
.btn { padding: 0.5rem 1rem; border: none; border-radius: 6px; cursor: pointer; font-weight: 600; font-size: 0.9rem; color: #fff; transition: opacity 0.2s; }
.btn:hover { opacity: 0.9; }
.btn-primary { background: var(--primary); }
.btn-success { background: var(--success); }
.btn-danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.btn-outline { background: #21262d; border: 1px solid var(--border); color: var(--text); }
.select { background: var(--bg); color: var(--text); border: 1px solid var(--border); padding: 0.4rem; border-radius: 4px; outline: none; }
.seo-block { margin-top: 4rem; padding-top: 2rem; border-top: 1px solid var(--border); }
.seo-block h2, .seo-block h3 { color: #fff; margin-top: 1.5rem; }
.seo-text { color: #8b949e; line-height: 1.7; }
.seo-text ul { padding-left: 1.2rem; }
.seo-text code { background: #21262d; padding: 0.2rem 0.4rem; border-radius: 4px; font-family: monospace; }
.faq-item { background: var(--card); padding: 1.5rem; border-radius: 8px; border: 1px solid var(--border); margin-top: 1rem; }
.faq-item strong { display: block; color: #fff; font-size: 1.1rem; margin-bottom: 0.5rem; }
.faq-item p { margin: 0; color: #8b949e; }
footer { text-align: center; padding: 2rem; color: #8b949e; border-top: 1px solid var(--border); margin-top: 4rem; }
@media(min-width: 992px) { .editor-grid { flex-direction: row; } .panel { flex: 1; min-width: 0; } .toolbar { width: 100%; } .CodeMirror { height: 600px; } }