/* ================================================================
   index.css — riêng cho TRANG CHỦ
   Hero, thanh dán link, lưới thẻ công cụ.
   ================================================================ */
.hero{padding:60px 0 34px}
.hero h1{
  font-size:clamp(30px,6vw,50px);
  line-height:1.06;
  letter-spacing:-.03em;
  font-weight:800;
  margin:0 0 16px;
  /* max-width:17ch; */
  }
.hero h1 .grad{background:linear-gradient(105deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p{font-size:clamp(15px,2.2vw,18px);color:var(--muted);margin:0 0 26px;max-width:54ch}

.paste{display:flex;gap:8px;background:var(--surface);border:1px solid var(--line);
  border-radius:14px;padding:8px;max-width:640px;box-shadow:var(--shadow);transition:border-color .15s;}
.paste:focus-within{border-color:var(--accent)}
.paste input{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);
  font:inherit;font-size:15px;padding:10px 12px;outline:none;}
.paste input::placeholder{color:var(--muted)}
.hint{font-size:13px;color:var(--muted);margin:12px 2px 0;min-height:18px}
.hint.match{color:var(--ok);font-weight:500}

.sec{padding:22px 0 70px}
.sec h2{font-size:22px;letter-spacing:-.02em;margin:0 0 4px}
.sec .sub{color:var(--muted);font-size:14.5px;margin:0 0 24px}

.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(300px,1fr))}
a.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;display:flex;flex-direction:column;box-shadow:var(--shadow);
  text-decoration:none;color:inherit;transition:border-color .15s,transform .15s;}
a.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card h3{font-size:16.5px;margin:0 0 6px;letter-spacing:-.01em}
.card .desc{color:var(--muted);font-size:14px;margin:0 0 18px;flex:1}
.card .open{color:var(--accent);font-weight:600;font-size:14px;display:inline-flex;
  align-items:center;gap:7px}
.card .open i{transition:transform .15s}
a.card:hover .open i{transform:translateX(4px)}
@media (prefers-reduced-motion:reduce){a.card:hover{transform:none}}