/* ── GPX ↔ GeoJSON Converter — CSS ── */
:root{
  --bg:#0f0f14;--bg-card:#1e1e28;--bg-surface:#18181f;
  --primary:#3b82f6;--secondary:#2563eb;--accent:#60a5fa;
  --green:#22c55e;--orange:#f97316;
  --text:#e8e8f0;--text-muted:#9999b8;--text-faint:#555570;
  --border:rgba(255,255,255,.08);--border-strong:rgba(255,255,255,.14);
  --radius:14px;--radius-sm:8px;
  --font:'Inter',system-ui,sans-serif;--font-mono:'Fira Code','Cascadia Code',monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--bg);color:var(--text);font-family:var(--font);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:var(--font-mono);font-size:.85em;background:rgba(59,130,246,.1);color:#93c5fd;padding:2px 6px;border-radius:4px}

/* Header */
.site-header{background:rgba(15,15,20,.9);backdrop-filter:blur(14px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200;padding:0 24px;height:58px;display:flex;align-items:center}
.header-inner{width:100%;max-width:1200px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none}
.logo-icon{width:32px;height:32px;flex-shrink:0}
.logo-text{font-size:.97rem;font-weight:700;color:var(--text);letter-spacing:-.01em}
.main-nav{display:flex;gap:6px}
.nav-link{padding:5px 12px;border-radius:var(--radius-sm);font-size:.84rem;font-weight:500;color:var(--text-muted);text-decoration:none;transition:color .15s,background .15s}
.nav-link:hover,.nav-link.active{color:var(--text);background:rgba(255,255,255,.06)}

/* Wrap */
.main-wrap{max-width:1060px;margin:0 auto;padding:28px 24px 80px}
@media(max-width:640px){.main-wrap{padding:18px 14px 60px}}

/* Hero */
.tool-hero{text-align:center;padding:24px 0 20px}
.tool-badge{display:inline-flex;align-items:center;gap:5px;padding:4px 12px;background:rgba(59,130,246,.1);color:var(--primary);border-radius:20px;font-size:.73rem;font-weight:600;margin-bottom:12px}
.tool-title{font-size:clamp(1.6rem,4vw,2.2rem);font-weight:800;letter-spacing:-.02em;margin-bottom:8px}
.gradient-title{background:linear-gradient(135deg,var(--primary),#a78bfa);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.tool-subtitle{font-size:.97rem;color:var(--text-muted);max-width:620px;margin:0 auto}

.ad-slot{background:rgba(255,255,255,.02);border:1px dashed rgba(255,255,255,.07);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;min-height:90px;font-size:.75rem;color:var(--text-faint);text-align:center;padding:12px;margin-bottom:20px}

/* Card */
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;margin-bottom:20px}
.card-header{padding:12px 18px;border-bottom:1px solid var(--border);background:rgba(255,255,255,.02);display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.card-icon{width:28px;height:28px;border-radius:7px;background:rgba(59,130,246,.12);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.card-icon svg{width:13px;height:13px;color:var(--primary)}
.card-title{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--text-faint)}
.card-body{padding:18px}

/* Buttons */
.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:10px 20px;border-radius:var(--radius-sm);background:var(--primary);color:#fff;font-weight:700;font-size:.88rem;border:none;cursor:pointer;transition:background .15s;white-space:nowrap}
.btn-primary:hover{background:var(--secondary)}
.btn-outline{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:9px 14px;border-radius:var(--radius-sm);background:transparent;color:var(--text-muted);font-size:.82rem;font-weight:600;border:1px solid var(--border);cursor:pointer;transition:border-color .15s,color .15s;white-space:nowrap}
.btn-outline:hover{border-color:var(--primary);color:var(--text)}
.btn-green{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:var(--radius-sm);background:rgba(34,197,94,.15);color:var(--green);font-weight:700;font-size:.88rem;border:1px solid rgba(34,197,94,.3);cursor:pointer;transition:background .15s;white-space:nowrap}
.btn-green:hover{background:rgba(34,197,94,.25)}

/* Direction toggle */
.dir-toggle{display:flex;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden;width:fit-content}
.dir-opt{padding:9px 22px;font-size:.85rem;font-weight:700;cursor:pointer;border:none;background:transparent;color:var(--text-faint);transition:all .15s;white-space:nowrap}
.dir-opt.active{color:#fff}
.dir-opt.gpx.active{background:rgba(249,115,22,.7)}
.dir-opt.geojson.active{background:rgba(59,130,246,.8)}

/* Textarea editor */
.editor-wrap{position:relative}
.code-editor{font-family:var(--font-mono);font-size:.8rem;line-height:1.65;background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;color:#e2e8f0;width:100%;min-height:220px;resize:vertical;outline:none;transition:border-color .15s;tab-size:2}
.code-editor:focus{border-color:var(--primary)}
.code-editor::placeholder{color:var(--text-faint)}

/* Two-column converter layout */
.conv-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:start}
@media(max-width:760px){.conv-grid{grid-template-columns:1fr;gap:12px}}
.conv-arrow{display:flex;flex-direction:column;align-items:center;justify-content:center;padding-top:50px;gap:8px}
@media(max-width:760px){.conv-arrow{flex-direction:row;padding-top:0;justify-content:center}}

/* Format badge */
.fmt-badge{display:inline-flex;align-items:center;padding:3px 9px;border-radius:10px;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.04em}
.fmt-gpx{background:rgba(249,115,22,.1);color:#fdba74;border:1px solid rgba(249,115,22,.2)}
.fmt-geojson{background:rgba(59,130,246,.12);color:#93c5fd;border:1px solid rgba(59,130,246,.2)}

/* Stats row */
.stats-row{display:flex;gap:16px;flex-wrap:wrap;padding:10px 18px;border-top:1px solid var(--border);background:rgba(255,255,255,.01)}
.stat-item{display:flex;align-items:baseline;gap:5px}
.stat-val{font-size:1rem;font-weight:800;color:var(--primary)}
.stat-label{font-size:.72rem;color:var(--text-faint)}

/* Error/success */
.err-box{background:rgba(239,68,68,.07);border:1px solid rgba(239,68,68,.2);border-radius:var(--radius-sm);padding:12px 14px;font-size:.82rem;color:#f87171;display:flex;gap:8px;align-items:flex-start;margin-top:10px}
.ok-box{background:rgba(34,197,94,.07);border:1px solid rgba(34,197,94,.2);border-radius:var(--radius-sm);padding:10px 14px;font-size:.82rem;color:#4ade80;display:flex;gap:6px;align-items:center;margin-top:10px}

/* Page sections */
.page-section{padding:40px 0 0}
.section-head{text-align:center;margin-bottom:28px}
.section-title{font-size:clamp(1.3rem,3vw,1.7rem);font-weight:800;letter-spacing:-.02em}
.section-desc{font-size:.93rem;color:var(--text-muted);margin-top:6px}
.section-divider{height:1px;background:var(--border);margin:40px 0 0}

.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.feature-icon{font-size:1.5rem;margin-bottom:8px}
.feature-title{font-size:.9rem;font-weight:700;margin-bottom:4px}
.feature-desc{font-size:.8rem;color:var(--text-muted);line-height:1.5}

.steps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:14px}
.step-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;gap:14px;align-items:flex-start}
.step-number{width:32px;height:32px;border-radius:50%;background:rgba(59,130,246,.15);color:var(--primary);font-weight:800;font-size:.9rem;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.step-title{font-size:.9rem;font-weight:700;margin-bottom:4px}
.step-desc{font-size:.8rem;color:var(--text-muted);line-height:1.5}

.logic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.logic-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:18px}
.logic-title{font-size:.88rem;font-weight:700;margin-bottom:6px}
.logic-desc{font-size:.8rem;color:var(--text-muted);line-height:1.55}

.faq-list{display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;padding:14px 18px;font-size:.9rem;font-weight:600;background:none;border:none;color:var(--text);cursor:pointer;text-align:left;gap:10px}
.faq-icon{font-size:1.2rem;color:var(--text-faint);flex-shrink:0;transition:transform .2s}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-item.open .faq-a{max-height:400px}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a p{padding:0 18px 16px;font-size:.85rem;color:var(--text-muted);line-height:1.65}

.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.related-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:6px;text-decoration:none;transition:border-color .15s}
.related-card:hover{border-color:var(--primary);text-decoration:none}
.related-icon{width:36px;height:36px;border-radius:9px;display:flex;align-items:center;justify-content:center;margin-bottom:4px}
.related-icon svg{width:17px;height:17px;color:#fff}
.related-name{font-size:.88rem;font-weight:700;color:var(--text)}
.related-desc{font-size:.77rem;color:var(--text-muted);line-height:1.4}
.related-link{font-size:.75rem;color:var(--primary);font-weight:600;margin-top:auto}

.blog-related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:14px}
.blog-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:16px;display:flex;flex-direction:column;gap:6px;text-decoration:none;transition:border-color .15s}
.blog-card:hover{border-color:var(--primary);text-decoration:none}
.blog-tag-sm{font-size:.7rem;font-weight:700;color:var(--primary)}
.blog-title-sm{font-size:.85rem;font-weight:600;color:var(--text);line-height:1.4}
.blog-link{font-size:.75rem;color:var(--primary);font-weight:600;margin-top:auto}

.site-footer{border-top:1px solid var(--border);padding:40px 24px 28px;margin-top:60px}
.footer-grid{max-width:1060px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:28px}
@media(max-width:768px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.footer-grid{grid-template-columns:1fr}}
.footer-brand-text{font-size:.82rem;color:var(--text-faint);margin-top:8px;line-height:1.5}
.footer-heading{font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-faint);margin-bottom:10px}
.footer-links{display:flex;flex-direction:column;gap:7px}
.footer-links a{font-size:.83rem;color:var(--text-muted)}
.footer-links a:hover{color:var(--text)}
.footer-bottom{max-width:1060px;margin:0 auto;display:flex;justify-content:space-between;align-items:center;font-size:.75rem;color:var(--text-faint);flex-wrap:wrap;gap:8px;padding-top:16px;border-top:1px solid var(--border)}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(12px);background:#22c55e;color:#fff;padding:8px 18px;border-radius:20px;font-size:.82rem;font-weight:600;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;z-index:999;white-space:nowrap}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}