[hidden]{display:none!important}

:root{
  --bg:#0d1117;
  --bg-soft:#141a23;
  --panel:#1a2230;
  --line:#2a3444;
  --ink:#eef3fa;
  --muted:#8b98ab;
  --accent:#4de0b3;
  --accent-2:#6a8dff;
  --pink:#ff7ab8;
  --radius:18px;
  --font:'Sora',sans-serif;
  --mono:'IBM Plex Mono',monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:var(--font);line-height:1.55;-webkit-font-smoothing:antialiased}

/* ---------- header ---------- */
.topbar{
  position:sticky;top:0;z-index:50;height:68px;
  display:flex;align-items:center;gap:2.5rem;
  padding:0 clamp(1rem,4vw,2.5rem);
  background:rgba(13,17,23,.72);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{font-weight:800;font-size:1.1rem;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:.5rem}
.brand span:last-child{color:var(--accent)}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0d1117;font-size:1rem}
.topnav{display:flex;gap:1.5rem;margin-left:auto}
.topnav a{color:var(--muted);text-decoration:none;font-size:.9rem;font-weight:600;transition:color .2s}
.topnav a:hover{color:var(--ink)}
.cta{margin-left:.5rem;background:var(--accent);color:#0d1117;font-weight:700;font-size:.85rem;padding:.55rem 1.1rem;border-radius:999px;text-decoration:none;transition:transform .15s,box-shadow .2s}
.cta:hover{transform:translateY(-1px);box-shadow:0 6px 20px rgba(77,224,179,.35)}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(3.5rem,8vw,6rem) 1.5rem 2.5rem;text-align:center}
.hero-blob{position:absolute;z-index:0;border-radius:50%;filter:blur(90px);opacity:.35;pointer-events:none}
.blob-a{width:420px;height:420px;background:var(--accent-2);top:-180px;left:-120px}
.blob-b{width:380px;height:380px;background:var(--accent);top:-60px;right:-140px;opacity:.22}
.hero-inner{position:relative;z-index:2;max-width:720px;margin:0 auto}
.eyebrow{display:inline-block;font-size:.75rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);border:1px solid rgba(77,224,179,.35);padding:.35rem .9rem;border-radius:999px;margin-bottom:1.25rem}
.hero h1{font-size:clamp(2.2rem,5.5vw,3.6rem);font-weight:800;line-height:1.12;letter-spacing:-.02em}
.grad{background:linear-gradient(90deg,var(--accent),var(--accent-2),var(--pink));-webkit-background-clip:text;background-clip:text;color:transparent}
.sub{margin:1.1rem auto 0;max-width:520px;color:var(--muted);font-size:1.02rem}

/* ---------- tool ---------- */
.tool{position:relative;z-index:2;max-width:1100px;margin:0 auto;padding:1rem 1.5rem 3rem;display:grid;grid-template-columns:1fr 1fr;gap:1.5rem;align-items:start}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem;box-shadow:0 24px 60px rgba(0,0,0,.35)}
.panel-head{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:.9rem;min-height:34px}
.panel-head h2{font-size:1rem;font-weight:700;letter-spacing:.02em}
.panel-tools{display:flex;align-items:center;gap:.6rem}
.count-pill{font-family:var(--mono);font-size:.72rem;color:var(--muted);background:var(--bg-soft);border:1px solid var(--line);padding:.25rem .65rem;border-radius:999px;white-space:nowrap}
.count-pill.accent{color:var(--accent);border-color:rgba(77,224,179,.4)}
.ghost-btn{background:none;border:1px solid var(--line);color:var(--muted);font-family:var(--font);font-size:.75rem;font-weight:600;padding:.3rem .75rem;border-radius:999px;cursor:pointer;transition:all .2s}
.ghost-btn:hover{color:var(--ink);border-color:var(--muted)}

textarea{
  width:100%;min-height:230px;resize:vertical;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;
  color:var(--ink);font-family:var(--mono);font-size:.9rem;line-height:1.7;padding:1rem;
  transition:border-color .2s,box-shadow .2s;
}
textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(77,224,179,.15)}
textarea::placeholder{color:#54617a}

.actions{display:grid;grid-template-columns:1fr 1fr;gap:.8rem;margin-top:1rem}
.action-btn{
  display:flex;align-items:center;gap:.75rem;text-align:left;
  border:1px solid var(--line);border-radius:14px;padding:.8rem .95rem;cursor:pointer;
  background:var(--bg-soft);color:var(--ink);font-family:var(--font);
  transition:transform .15s,border-color .2s,box-shadow .2s;
}
.action-btn:hover{transform:translateY(-2px)}
.action-btn:active{transform:translateY(0)}
.action-btn strong{display:block;font-size:.88rem;font-weight:700}
.action-btn small{display:block;font-family:var(--mono);font-size:.66rem;color:var(--muted);margin-top:.15rem}
.btn-icon{flex:0 0 38px;height:38px;display:grid;place-items:center;border-radius:10px;font-weight:800;font-size:1.15rem}
.action-btn.csv .btn-icon{background:rgba(106,141,255,.16);color:var(--accent-2)}
.action-btn.tag .btn-icon{background:rgba(77,224,179,.14);color:var(--accent)}
.action-btn.csv:hover{border-color:var(--accent-2);box-shadow:0 8px 24px rgba(106,141,255,.18)}
.action-btn.tag:hover{border-color:var(--accent);box-shadow:0 8px 24px rgba(77,224,179,.18)}
.action-btn.is-active{border-color:currentColor}

.hint{margin-top:.8rem;font-size:.8rem;color:var(--pink)}

/* output */
.output-wrap{position:relative}
.mode-badge{
  position:absolute;top:-11px;right:14px;z-index:3;
  font-family:var(--mono);font-size:.66rem;font-weight:500;letter-spacing:.06em;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));color:#0d1117;
  padding:.25rem .7rem;border-radius:999px;
}
.output{
  min-height:230px;max-height:420px;overflow:auto;
  background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;
  padding:1.1rem;font-family:var(--mono);font-size:.9rem;line-height:1.8;
  white-space:pre-wrap;word-break:break-word;
}
.output.empty{color:#54617a;font-style:italic}
.output.flash{animation:flash .5s ease}
@keyframes flash{0%{border-color:var(--accent);box-shadow:0 0 0 4px rgba(77,224,179,.2)}100%{border-color:var(--line);box-shadow:none}}

.copy-btn{
  display:inline-flex;align-items:center;gap:.45rem;
  background:var(--accent);color:#0d1117;border:none;border-radius:999px;
  font-family:var(--font);font-weight:700;font-size:.78rem;padding:.45rem .95rem;cursor:pointer;
  transition:transform .15s,box-shadow .2s,background .2s;
}
.copy-btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(77,224,179,.35)}
.copy-btn.copied{background:var(--accent-2);color:#fff}
.copy-note{margin-top:.7rem;font-size:.8rem;color:var(--pink)}

/* ---------- how ---------- */
.how{max-width:1100px;margin:0 auto;padding:0 1.5rem 4rem}
.how-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.how-card{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:1.8rem 1.4rem 1.4rem;overflow:visible}
.step{position:absolute;top:-16px;left:1.2rem;z-index:2;width:34px;height:34px;display:grid;place-items:center;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#0d1117;font-weight:800;font-size:.95rem;box-shadow:0 8px 18px rgba(77,224,179,.3)}
.how-card h3{font-size:.95rem;font-weight:700;margin-bottom:.4rem}
.how-card p{font-size:.84rem;color:var(--muted)}

.foot{border-top:1px solid var(--line);padding:1.6rem;text-align:center;font-size:.78rem;color:var(--muted)}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .tool{grid-template-columns:1fr}
  .how-grid{grid-template-columns:1fr;gap:1.8rem}
  .topnav{display:none}
  .cta{margin-left:auto}
}
@media (max-width:480px){
  .actions{grid-template-columns:1fr}
  .panel{padding:1.1rem}
}