/* ── Theme ──────────────────────────────────────────────── */
:root {
  --primary:    #0ea5e9;
  --secondary:  #0284c7;
  --grad:       linear-gradient(135deg,#0ea5e9,#0284c7);
  --bg:         #0a0f14;
  --bg-card:    #111822;
  --bg-surface: #0d1520;
  --text:       #e2eaf4;
  --text-muted: #8ba0b8;
  --text-faint: #4a6070;
  --border:        rgba(255,255,255,.07);
  --border-medium: rgba(14,165,233,.22);
  --radius:    14px;
  --radius-sm:  8px;
  --font: system-ui,-apple-system,sans-serif;
  --transition: .15s ease;
}

*,*::before,*::after { box-sizing:border-box;margin:0;padding:0; }
html { font-size:16px;scroll-behavior:smooth; }
body { background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.6; }
a    { color:var(--primary);text-decoration:none; }
a:hover { text-decoration:underline; }
button { cursor:pointer;border:none;font-family:inherit; }
input,select { font-family:inherit; }
.container { max-width:1160px;margin:0 auto;padding:0 20px; }

/* ── Header ─────────────────────────────────────────────── */
.site-header { background:rgba(10,15,20,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100; }
.header-inner { max-width:1160px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:56px; }
.logo { display:flex;align-items:center;gap:9px; }
.logo-icon { width:30px;height:30px;border-radius:8px; }
.logo-text { font-weight:700;font-size:1.05rem;color:var(--text); }
.main-nav { display:flex;gap:4px; }
.nav-link { padding:6px 12px;border-radius:7px;font-size:.875rem;color:var(--text-muted);transition:background var(--transition),color var(--transition); }
.nav-link:hover,.nav-link.active { background:rgba(14,165,233,.1);color:var(--primary);text-decoration:none; }

/* ── Page ────────────────────────────────────────────────── */
.page-wrap { max-width:1160px;margin:0 auto;padding:32px 20px 64px; }

/* ── Hero ────────────────────────────────────────────────── */
.tool-badge { display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:20px;background:rgba(14,165,233,.1);border:1px solid rgba(14,165,233,.2);color:var(--primary);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;margin-bottom:14px; }
.tool-title { font-size:clamp(1.6rem,3vw,2.2rem);font-weight:800;line-height:1.1;margin-bottom:10px; }
.gradient-title { background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent; }
.tool-subtitle { color:var(--text-muted);font-size:1rem;max-width:600px; }
.tool-hero { margin-bottom:28px; }

/* ── Ad slot ────────────────────────────────────────────── */
.ad-slot { border:1px dashed rgba(255,255,255,.08);border-radius:var(--radius);padding:14px;text-align:center;font-size:.75rem;color:var(--text-faint);margin-bottom:28px; }

/* ── Error banner ────────────────────────────────────────── */
.error-banner { background:rgba(239,68,68,.12);border:1px solid rgba(239,68,68,.3);color:#fca5a5;padding:10px 14px;border-radius:var(--radius-sm);margin-bottom:16px;font-size:.85rem;cursor:pointer; }

/* ── Layout ──────────────────────────────────────────────── */
.tool-layout { display:grid;grid-template-columns:1fr 340px;gap:24px;align-items:start; }
@media(max-width:840px){ .tool-layout { grid-template-columns:1fr; } }

/* ── Panel ───────────────────────────────────────────────── */
.panel { background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden; }

/* ── Panel tabs ─────────────────────────────────────────── */
.panel-tabs { display:flex;border-bottom:1px solid var(--border); }
.ptab { flex:1;padding:11px 6px;text-align:center;font-size:.78rem;font-weight:700;color:var(--text-muted);cursor:pointer;transition:color var(--transition),border-color var(--transition);border-bottom:2px solid transparent;margin-bottom:-1px; }
.ptab.on { color:var(--primary);border-bottom-color:var(--primary); }
.ptab:hover:not(.on) { color:var(--text); }

.panel-body { padding:20px; }

/* ── Compass card ────────────────────────────────────────── */
.compass-card { background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;display:flex;flex-direction:column;align-items:center;gap:16px;position:sticky;top:76px; }
.compass-wrap { width:220px;height:220px;position:relative; }
.compass-svg { width:100%;height:100%; }
.compass-needle-group { transform-origin:100px 100px;transition:transform .55s cubic-bezier(.34,1.56,.64,1); }

.compass-bearing-display { text-align:center; }
.cbd-deg  { font-size:2rem;font-weight:800;color:var(--text);line-height:1; }
.cbd-card { font-size:.95rem;color:var(--primary);font-weight:700;margin-top:4px; }
.cbd-hint { font-size:.72rem;color:var(--text-faint);margin-top:3px; }

/* ── Fields ──────────────────────────────────────────────── */
.field { margin-bottom:14px; }
.field label { display:block;font-size:.78rem;font-weight:700;color:var(--text-muted);margin-bottom:5px;text-transform:uppercase;letter-spacing:.04em; }
.inp { width:100%;padding:9px 12px;background:var(--bg-surface);border:1px solid var(--border-medium);border-radius:var(--radius-sm);color:var(--text);font-size:.88rem;transition:border-color var(--transition); }
.inp:focus { outline:none;border-color:var(--primary); }
.inp::placeholder { color:var(--text-faint); }

/* ── Coord grid ─────────────────────────────────────────── */
.coord-grid { display:grid;grid-template-columns:1fr 1fr;gap:10px; }
.coord-label { font-size:.75rem;font-weight:800;color:var(--primary);text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px;padding:4px 10px;background:rgba(14,165,233,.08);border-radius:5px;display:inline-block; }

/* ── Swap button ────────────────────────────────────────── */
.btn-swap { display:flex;align-items:center;justify-content:center;gap:7px;width:100%;padding:9px;background:rgba(14,165,233,.06);border:1px solid var(--border-medium);border-radius:8px;color:var(--text-muted);font-size:.82rem;font-weight:600;margin:10px 0 14px;transition:background var(--transition),color var(--transition),border-color var(--transition); }
.btn-swap:hover { background:rgba(14,165,233,.12);color:var(--primary);border-color:var(--primary); }

/* ── Primary button ─────────────────────────────────────── */
.btn-primary { width:100%;padding:11px;background:var(--grad);border-radius:9px;color:#fff;font-size:.9rem;font-weight:700;letter-spacing:.02em;transition:opacity var(--transition),transform var(--transition); }
.btn-primary:hover { opacity:.9;transform:translateY(-1px); }
.btn-primary:active { transform:translateY(0); }

/* ── Error text ─────────────────────────────────────────── */
.field-err { font-size:.78rem;color:#f87171;margin-top:6px; }

/* ── Result card ─────────────────────────────────────────── */
.result-card { margin-top:18px;background:var(--bg-surface);border:1px solid var(--border-medium);border-radius:var(--radius);overflow:hidden; }
.rc-header { padding:12px 16px;background:rgba(14,165,233,.07);border-bottom:1px solid var(--border);font-size:.78rem;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.05em; }

.result-grid { display:grid;grid-template-columns:1fr 1fr;gap:0; }
.result-item { padding:14px 16px;border-right:1px solid var(--border);border-bottom:1px solid var(--border); }
.result-item:nth-child(2n) { border-right:none; }
.result-item:last-child,.result-item:nth-last-child(2):nth-child(odd) { border-bottom:none; }
.ri-label { font-size:.7rem;color:var(--text-faint);font-weight:700;text-transform:uppercase;letter-spacing:.05em;margin-bottom:3px; }
.ri-val { font-size:1.05rem;font-weight:700;color:var(--text); }
.ri-sub { font-size:.75rem;color:var(--text-muted);margin-top:1px; }

.result-row { padding:12px 16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border); }
.result-row:last-child { border-bottom:none; }
.rr-label { font-size:.75rem;color:var(--text-muted);font-weight:600; }
.rr-val   { font-size:.88rem;font-weight:700;color:var(--text); }

.copy-btn { padding:3px 8px;background:rgba(14,165,233,.08);border:1px solid var(--border-medium);border-radius:5px;color:var(--primary);font-size:.7rem;font-weight:600;cursor:pointer;transition:background var(--transition); }
.copy-btn:hover { background:rgba(14,165,233,.18); }

/* ── Bearing pill ────────────────────────────────────────── */
.bearing-pill { display:inline-flex;align-items:center;gap:8px;padding:4px 12px;background:rgba(14,165,233,.1);border:1px solid rgba(14,165,233,.22);border-radius:20px;font-size:.78rem;font-weight:700;color:var(--primary); }
.bearing-pill .deg-big { font-size:1.1rem;color:var(--text); }

/* ── Format select row ───────────────────────────────────── */
.fmt-row { display:flex;gap:8px;margin-bottom:14px; }
.fmt-chip { flex:1;padding:7px 4px;text-align:center;border-radius:7px;border:1px solid var(--border-medium);background:var(--bg-surface);color:var(--text-muted);font-size:.75rem;font-weight:700;cursor:pointer;transition:all var(--transition); }
.fmt-chip.on { background:rgba(14,165,233,.12);border-color:var(--primary);color:var(--primary); }

/* ── Section label ───────────────────────────────────────── */
.sec-label { font-size:.7rem;font-weight:700;color:var(--text-faint);text-transform:uppercase;letter-spacing:.07em;margin-bottom:10px;margin-top:4px; }

/* ── Mag direction chips ─────────────────────────────────── */
.decl-hint { font-size:.75rem;color:var(--text-faint);margin-bottom:12px;padding:8px 10px;background:rgba(14,165,233,.04);border:1px solid var(--border);border-radius:6px;line-height:1.6; }

/* ── Quick reference table ───────────────────────────────── */
.ref-table { width:100%;border-collapse:collapse;font-size:.8rem;margin-top:6px; }
.ref-table th { padding:6px 10px;text-align:left;color:var(--text-faint);font-weight:700;border-bottom:1px solid var(--border);font-size:.7rem;text-transform:uppercase;letter-spacing:.04em; }
.ref-table td { padding:7px 10px;border-bottom:1px solid var(--border);color:var(--text-muted); }
.ref-table tr:last-child td { border-bottom:none; }
.ref-table td:first-child { font-weight:700;color:var(--text); }
.ref-dot { display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:6px; }

/* ── Tags ────────────────────────────────────────────────── */
.tags-section { display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:28px; }
.tags-label { font-size:.75rem;font-weight:700;color:var(--text-faint); }
.tag-chip { padding:3px 10px;background:rgba(14,165,233,.07);border:1px solid rgba(14,165,233,.14);border-radius:20px;font-size:.73rem;color:var(--text-muted);transition:background var(--transition),color var(--transition); }
.tag-chip:hover { background:rgba(14,165,233,.15);color:var(--primary);text-decoration:none; }

/* ── Related ─────────────────────────────────────────────── */
.related-section { margin-bottom:32px; }
.related-heading { font-size:1.05rem;font-weight:700;color:var(--text);margin-bottom:16px; }

/* Tools cards */
.related-tools-grid { display:grid;grid-template-columns:repeat(4,1fr);gap:12px; }
@media(max-width:900px){ .related-tools-grid { grid-template-columns:repeat(2,1fr); } }
@media(max-width:480px){ .related-tools-grid { grid-template-columns:1fr 1fr; } }

.rel-tool-card { display:flex;flex-direction:column;align-items:flex-start;gap:10px;padding:18px 16px 14px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);text-decoration:none;transition:border-color var(--transition),background var(--transition),transform var(--transition);position:relative; }
.rel-tool-card:hover { border-color:var(--primary);background:rgba(14,165,233,.04);transform:translateY(-2px);text-decoration:none; }
.rtc-icon { width:44px;height:44px;border-radius:10px;border:1px solid;display:flex;align-items:center;justify-content:center;flex-shrink:0; }
.rtc-icon svg { width:22px;height:22px; }
.rtc-title { font-size:.88rem;font-weight:700;color:var(--text);line-height:1.3; }
.rtc-desc { font-size:.75rem;color:var(--text-muted);line-height:1.5;flex:1; }
.rtc-arrow { font-size:.8rem;color:var(--primary);margin-top:auto;opacity:0;transition:opacity var(--transition),transform var(--transition); }
.rel-tool-card:hover .rtc-arrow { opacity:1;transform:translateX(3px); }

/* Blog cards */
.related-blog-grid { display:grid;grid-template-columns:repeat(3,1fr);gap:12px; }
@media(max-width:780px){ .related-blog-grid { grid-template-columns:1fr 1fr; } }
@media(max-width:480px){ .related-blog-grid { grid-template-columns:1fr; } }

.rel-blog-card { display:flex;flex-direction:column;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;text-decoration:none;transition:border-color var(--transition),transform var(--transition); }
.rel-blog-card:hover { border-color:var(--primary);transform:translateY(-2px);text-decoration:none; }
.rbc-bar { height:4px;flex-shrink:0; }
.rbc-body { padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1; }
.rbc-tag { display:inline-block;padding:2px 8px;background:rgba(14,165,233,.1);border:1px solid rgba(14,165,233,.18);border-radius:20px;font-size:.68rem;font-weight:700;color:var(--primary);text-transform:uppercase;letter-spacing:.04em;align-self:flex-start; }
.rbc-title { font-size:.88rem;font-weight:700;color:var(--text);line-height:1.4; }
.rbc-desc { font-size:.75rem;color:var(--text-muted);line-height:1.55; }

/* ── FAQ ─────────────────────────────────────────────────── */
.faq-section { margin-bottom:40px; }
.faq-title { font-size:1.1rem;font-weight:700;margin-bottom:16px;color:var(--text); }
.faq-item { border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:8px;overflow:hidden; }
.faq-q { padding:13px 16px;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:.88rem;font-weight:600;color:var(--text);user-select:none;gap:10px; }
.faq-q svg { width:16px;height:16px;flex-shrink:0;transition:transform var(--transition);color:var(--text-muted); }
.faq-item.open .faq-q svg { transform:rotate(180deg); }
.faq-a { display:none;padding:0 16px 14px;font-size:.83rem;color:var(--text-muted);line-height:1.7;border-top:1px solid var(--border); }
.faq-item.open .faq-a { display:block; }

/* ── Footer ─────────────────────────────────────────────── */
.site-footer { background:var(--bg-surface);border-top:1px solid var(--border);margin-top:60px; }
.footer-inner { max-width:1160px;margin:0 auto;padding:40px 20px 32px;display:flex;gap:48px;flex-wrap:wrap; }
.footer-brand { flex:0 0 180px; }
.footer-tagline { font-size:.8rem;color:var(--text-faint);margin-top:8px; }
.footer-nav { display:flex;gap:40px;flex:1;flex-wrap:wrap; }
.footer-col h4 { font-size:.75rem;font-weight:700;color:var(--text);text-transform:uppercase;letter-spacing:.07em;margin-bottom:10px; }
.footer-col { display:flex;flex-direction:column;gap:0; }
.footer-col a { font-size:.82rem;color:var(--text-muted);padding:3px 0;transition:color var(--transition); }
.footer-col a:hover { color:var(--primary);text-decoration:none; }
.footer-bottom { border-top:1px solid var(--border);padding:16px 20px;display:flex;justify-content:center;gap:24px;flex-wrap:wrap; }
.footer-bottom p { font-size:.75rem;color:var(--text-faint); }

/* ── Toast ───────────────────────────────────────────────── */
#toast { position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(12px);background:rgba(14,165,233,.95);color:#fff;padding:9px 20px;border-radius:30px;font-size:.82rem;font-weight:700;pointer-events:none;opacity:0;transition:opacity .25s,transform .25s;z-index:9999; }
#toast.show { opacity:1;transform:translateX(-50%) translateY(0); }