:root {
  --dark: #0d1117;
  --darker: #060a0e;
  --card: #161b22;
  --card-border: #21262d;
  --text: #c9d1d9;
  --muted: #586069;
  --accent: #58a6ff;
  --gold: #e3b341;
  --green: #3fb950;
  --red: #f85149;
  --purple: #bc8cff;
  --orange: #ffa657;
  --pill-bg: #1f2937;
  --pill-border: #374151;
}
* { margin:0; padding:0; box-sizing:border-box; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--darker);
  color: var(--text);
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse at 0% 0%, rgba(88,166,255,0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 100% 100%, rgba(188,140,255,0.04) 0%, transparent 50%);
}
header {
  background: rgba(13,17,23,0.97);
  border-bottom: 1px solid var(--card-border);
  padding: 0 clamp(1rem,5vw,3rem);
  position: sticky; top:0; z-index:100;
  backdrop-filter: blur(12px);
}
.header-inner {
  max-width:1200px; margin:0 auto;
  display:flex; align-items:center; justify-content:space-between; height:60px;
}
.logo {
  font-weight:800; font-size:1.3rem; color:#fff;
  text-decoration:none; display:flex; align-items:center; gap:0.4rem;
  letter-spacing:-0.02em;
}
.logo-ji { color: var(--gold); }
nav a {
  color:var(--muted); text-decoration:none; font-size:0.85rem;
  margin-left:1.5rem; transition:color 0.2s;
}
nav a:hover { color:var(--text); }
.bmc-nav {
  display:inline-flex !important; align-items:center; gap:0.3rem;
  background:rgba(255,221,0,0.1) !important; border:1px solid rgba(255,221,0,0.25);
  color:#ffdd00 !important; padding:0.25rem 0.7rem; border-radius:20px;
  font-size:0.78rem !important; font-weight:600;
}
.bmc-nav:hover { background:rgba(255,221,0,0.2) !important; }
.breadcrumb {
  max-width:1200px; margin:0 auto;
  padding:0.75rem clamp(1rem,5vw,3rem); font-size:0.78rem; color:var(--muted);
}
.adsbygoogle {
  display: none !important;
}
.breadcrumb a { color:var(--accent); text-decoration:none; }
.breadcrumb span { margin:0 0.4rem; }
main { max-width:1200px; margin:0 auto; padding:2rem clamp(1rem,5vw,3rem) 3rem; }
.hero { margin-bottom:2rem; }
.hero-eyebrow {
  display:inline-flex; align-items:center; gap:0.4rem;
  background:rgba(88,166,255,0.1); border:1px solid rgba(88,166,255,0.2);
  color:var(--accent); padding:0.3rem 0.75rem; border-radius:100px;
  font-size:0.75rem; font-weight:600; margin-bottom:1rem;
  text-transform:uppercase; letter-spacing:0.08em;
}
.hero h1 {
  font-size:clamp(1.6rem,4vw,2.4rem); font-weight:800;
  color:#fff; line-height:1.2; margin-bottom:0.75rem; letter-spacing:-0.02em;
}
.hero h1 em { color:var(--accent); font-style:normal; }
.hero p { font-size:1rem; color:var(--muted); line-height:1.65; max-width:680px; }
.tool-box {
  background:var(--card); border:1px solid var(--card-border);
  border-radius:16px; padding:2rem; margin-bottom:2rem;
}
.tool-label {
  font-size:0.72rem; font-weight:700; text-transform:uppercase;
  letter-spacing:0.1em; color:var(--muted); margin-bottom:0.5rem; margin-top:1.2rem;
}
.tool-label:first-child { margin-top:0; }
.context-pills { display:flex; flex-wrap:wrap; gap:0.5rem; margin-bottom:0.5rem; }
.pill {
  background:var(--pill-bg); border:1px solid var(--pill-border);
  padding:0.3rem 0.75rem; border-radius:100px;
  font-size:0.78rem; color:var(--text); font-weight:500;
}
.pill.active {
  background:rgba(88,166,255,0.15); border-color:rgba(88,166,255,0.4); color:var(--accent);
}
/* Tone slider */
.tone-slider-wrap { margin-bottom:0.25rem; }
.tone-track {
  position:relative; height:6px; border-radius:3px;
  background: linear-gradient(to right, #3fb950, #58a6ff, #ffa657, #f85149);
  margin: 0.6rem 0 0.25rem;
}
.tone-track input[type=range] {
  position:absolute; top:50%; left:0; width:100%;
  transform:translateY(-50%);
  -webkit-appearance:none; appearance:none;
  background:transparent; cursor:pointer; outline:none;
}
.tone-track input[type=range]::-webkit-slider-thumb {
  -webkit-appearance:none;
  width:20px; height:20px; border-radius:50%;
  background:#fff; border:2px solid var(--accent);
  box-shadow:0 2px 8px rgba(0,0,0,0.4);
}
.tone-track input[type=range]::-moz-range-thumb {
  width:20px; height:20px; border-radius:50%;
  background:#fff; border:2px solid var(--accent); border-style:solid;
}
.tone-labels {
  display:flex; justify-content:space-between;
  font-size:0.68rem; color:var(--muted); padding:0 2px; margin-bottom:0.4rem;
}
.tone-badge {
  display:inline-flex; align-items:center; gap:0.3rem;
  background:rgba(88,166,255,0.1); border:1px solid rgba(88,166,255,0.2);
  color:var(--accent); padding:0.2rem 0.65rem; border-radius:100px;
  font-size:0.75rem; font-weight:600; transition:all 0.25s;
}
.generate-btn {
  display:inline-flex; align-items:center; gap:0.5rem;
  background:var(--accent); color:#0d1117;
  padding:0.85rem 1.8rem; border-radius:10px;
  font-size:0.95rem; font-weight:700; border:none; cursor:pointer;
  transition:all 0.2s; width:100%; justify-content:center; margin-top:1.2rem;
}
.generate-btn:hover { background:#79b8ff; transform:translateY(-1px); }
.generate-btn:disabled { opacity:0.7; cursor:not-allowed; transform:none; }
.output-box {
  background:var(--darker); border:1px solid var(--card-border);
  border-radius:12px; padding:1.5rem;
  font-size:0.9rem; line-height:1.75; color:var(--text);
  min-height:180px; margin-top:1.5rem; display:none;
}
.output-box.visible { display:block; }
.output-loading { display:flex; align-items:center; gap:0.5rem; color:var(--muted); font-size:0.85rem; }
.spinner {
  width:16px; height:16px; border:2px solid var(--card-border);
  border-top-color:var(--accent); border-radius:50%;
  animation:spin 0.8s linear infinite; flex-shrink:0;
}
@keyframes spin { to { transform:rotate(360deg); } }
/* Action buttons */
.email-actions {
  display:flex; gap:0.5rem; flex-wrap:wrap;
  margin-top:1rem; padding-top:0.75rem; border-top:1px solid var(--card-border);
}
.action-btn {
  display:inline-flex; align-items:center; gap:0.4rem;
  background:var(--card); border:1px solid var(--card-border);
  color:var(--muted); padding:0.4rem 0.9rem;
  border-radius:8px; font-size:0.8rem; cursor:pointer;
  transition:all 0.2s; font-family:inherit;
}
.action-btn:hover { color:var(--text); border-color:var(--text); }
.action-btn.primary { background:rgba(88,166,255,0.1); border-color:rgba(88,166,255,0.3); color:var(--accent); }
.action-btn.gmail { background:rgba(234,67,53,0.1); border-color:rgba(234,67,53,0.3); color:#ea4335; }
.action-btn.copied { color:var(--green); border-color:var(--green); }
/* Subject line */
.subject-result {
  display:none; background:rgba(88,166,255,0.06);
  border:1px solid rgba(88,166,255,0.2); border-radius:8px;
  padding:0.7rem 1rem; margin-top:0.75rem; font-size:0.85rem;
}
.subject-result.visible { display:block; }
.subject-label { font-size:0.68rem; font-weight:700; text-transform:uppercase; letter-spacing:0.08em; color:var(--muted); margin-bottom:0.25rem; }
.subject-text { color:var(--accent); font-weight:600; }
/* Placeholder form */
.placeholder-form {
  display:none; background:rgba(227,179,65,0.05);
  border:1px solid rgba(227,179,65,0.2); border-radius:10px;
  padding:1.25rem; margin-top:1rem;
}
.placeholder-form.visible { display:block; }
.placeholder-form-title {
  font-size:0.8rem; font-weight:700; color:var(--gold);
  text-transform:uppercase; letter-spacing:0.08em; margin-bottom:0.75rem;
}
.placeholder-fields { display:flex; flex-direction:column; gap:0.6rem; }
.placeholder-row { display:grid; grid-template-columns:1fr 1fr; gap:0.5rem; align-items:center; }
.placeholder-row label { font-size:0.8rem; color:var(--muted); word-break:break-word; }
.placeholder-row input {
  background:var(--darker); border:1px solid var(--card-border);
  border-radius:6px; padding:0.4rem 0.6rem; color:var(--text);
  font-size:0.82rem; font-family:inherit; outline:none;
}
.placeholder-row input:focus { border-color:var(--gold); }
.apply-btn {
  display:inline-flex; align-items:center; gap:0.4rem;
  background:rgba(227,179,65,0.15); border:1px solid rgba(227,179,65,0.3);
  color:var(--gold); padding:0.5rem 1.1rem; border-radius:8px;
  font-size:0.82rem; font-weight:600; cursor:pointer; margin-top:0.75rem;
  font-family:inherit; transition:all 0.2s;
}
.apply-btn:hover { background:rgba(227,179,65,0.25); }
/* Email history */
.history-section {
  background:var(--card); border:1px solid var(--card-border);
  border-radius:12px; padding:1.5rem; margin-bottom:2rem;
}
.history-empty { font-size:0.85rem; color:var(--muted); text-align:center; padding:1rem 0; }
.history-list { display:flex; flex-direction:column; gap:0.5rem; }
.history-item {
  background:var(--darker); border:1px solid var(--card-border);
  border-radius:8px; padding:0.75rem 1rem; cursor:pointer;
  transition:border-color 0.2s; display:flex; justify-content:space-between; align-items:center; gap:0.5rem;
}
.history-item:hover { border-color:var(--accent); }
.history-meta { font-size:0.72rem; color:var(--muted); margin-bottom:0.2rem; }
.history-preview { font-size:0.82rem; color:var(--text); white-space:nowrap; overflow:hidden; text-overflow:ellipsis; max-width:380px; }
.history-del { color:var(--muted); font-size:0.75rem; padding:0.2rem 0.4rem; border-radius:4px; transition:color 0.2s; flex-shrink:0; cursor:pointer; }
.history-del:hover { color:var(--red); }
/* AdSense slot */
.ad-slot {
  background:rgba(255,255,255,0.02); border:1px dashed var(--card-border);
  border-radius:8px; padding:1rem; text-align:center;
  color:var(--muted); font-size:0.75rem; margin-bottom:1.5rem;
  min-height:90px; display:flex; align-items:center; justify-content:center;
}
/* Buy Me a Coffee */
.bmc-banner {
  background:linear-gradient(135deg, rgba(255,221,0,0.07), rgba(255,165,0,0.05));
  border:1px solid rgba(255,221,0,0.18); border-radius:12px;
  padding:1.25rem 1.5rem; margin-bottom:2rem;
  display:flex; align-items:center; justify-content:space-between; gap:1rem; flex-wrap:wrap;
}
.bmc-text { font-size:0.9rem; color:var(--text); }
.bmc-text strong { color:#ffdd00; }
.bmc-link {
  display:inline-flex; align-items:center; gap:0.4rem;
  background:#ffdd00; color:#0d1117; padding:0.5rem 1.2rem;
  border-radius:8px; font-size:0.85rem; font-weight:700;
  text-decoration:none; transition:all 0.2s; white-space:nowrap;
}
.bmc-link:hover { background:#ffe833; transform:translateY(-1px); }
.section-title {
  font-size:1.1rem; font-weight:700; color:#fff;
  margin-bottom:1rem; display:flex; align-items:center; gap:0.5rem;
}
.section-title::after { content:''; flex:1; height:1px; background:var(--card-border); }
.tips-grid { display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:1rem; margin-bottom:2rem; }
.tip-card { background:var(--card); border:1px solid var(--card-border); border-radius:12px; padding:1.25rem; }
.tip-card h3 { font-size:0.85rem; font-weight:700; color:var(--orange); margin-bottom:0.4rem; text-transform:uppercase; letter-spacing:0.06em; }
.tip-card p { font-size:0.85rem; color:var(--muted); line-height:1.6; }
.related-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(200px,1fr)); gap:0.75rem; margin-bottom:2rem; }
.related-card {
  background:var(--card); border:1px solid var(--card-border);
  border-radius:10px; padding:1rem; text-decoration:none;
  transition:all 0.2s; display:flex; flex-direction:column; gap:0.3rem;
}
.related-card:hover { border-color:var(--accent); transform:translateY(-2px); }
.related-card .rc-tool { font-size:0.75rem; color:var(--muted); }
.related-card .rc-name { font-size:0.875rem; font-weight:600; color:var(--text); }
.related-card .rc-icon { font-size:1.1rem; margin-bottom:0.2rem; }
.faq-item { background:var(--card); border:1px solid var(--card-border); border-radius:10px; margin-bottom:0.5rem; overflow:hidden; }
.faq-question {
  padding:1rem 1.25rem; font-weight:600; font-size:0.9rem; cursor:pointer;
  display:flex; justify-content:space-between; align-items:center;
  transition:background 0.2s; user-select:none;
}
.faq-question:hover { background:rgba(255,255,255,0.03); }
.faq-answer { display:none; padding:0 1.25rem 1rem; font-size:0.875rem; line-height:1.65; color:var(--muted); }
.seo-prose { background:var(--card); border:1px solid var(--card-border); border-radius:12px; padding:2rem; margin-bottom:2rem; }
.seo-prose h2 { font-size:1.05rem; font-weight:700; color:#fff; margin:1.5rem 0 0.6rem; }
.seo-prose h2:first-child { margin-top:0; }
.seo-prose p { font-size:0.875rem; line-height:1.8; color:var(--muted); margin-bottom:0.75rem; }
.seo-prose ul { font-size:0.875rem; color:var(--muted); line-height:1.8; padding-left:1.25rem; margin-bottom:0.75rem; }
.seo-prose ul li { margin-bottom:0.25rem; }
.stats-bar {
  display:flex; gap:2rem; flex-wrap:wrap;
  background:var(--card); border:1px solid var(--card-border);
  border-radius:12px; padding:1.25rem 1.5rem; margin-bottom:2rem;
}
.stat { text-align:center; }
.stat-num { font-size:1.5rem; font-weight:800; color:var(--accent); line-height:1; }
.stat-label { font-size:0.72rem; color:var(--muted); margin-top:0.2rem; }
footer { background:var(--card); border-top:1px solid var(--card-border); padding:2rem clamp(1rem,5vw,3rem); }
.footer-inner { max-width:1200px; margin:0 auto; display:grid; grid-template-columns:1fr auto; gap:2rem; align-items:center; }
.footer-links { display:flex; gap:1.5rem; flex-wrap:wrap; justify-content:flex-end; }
.footer-links a { color:var(--muted); text-decoration:none; font-size:0.8rem; transition:color 0.2s; }
.footer-links a:hover { color:var(--text); }
.footer-disc { max-width:1200px; margin:1rem auto 0; border-top:1px solid var(--card-border); padding-top:1rem; font-size:0.73rem; color:var(--muted); line-height:1.6; }
.char-count { text-align:right; font-size:0.72rem; color:var(--muted); margin-top:0.3rem; }
@media (max-width:640px) {
  .hero h1 { font-size:1.5rem; }
  nav { display:none; }
  .footer-inner { grid-template-columns:1fr; }
  .footer-links { justify-content:flex-start; }
  .placeholder-row { grid-template-columns:1fr; }
  .bmc-banner { flex-direction:column; }
  .stats-bar { gap:1rem; justify-content:center; }
}