* { margin:0; padding:0; box-sizing:border-box; }
:root { --bg:#f9fafb; --white:#fff; --coral:#f43f5e; --coral-dark:#e11d48; --dark:#0f172a; --text:#475569; --dim:#94a3b8; --border:#e2e8f0; --green:#16a34a; --red:#dc2626; }
body { font-family:'Lexend',sans-serif; background:var(--bg); color:var(--text); min-height:100vh; }
.container { max-width:900px; margin:0 auto; padding:0 20px; }

.nav { background:var(--dark); }
.nav-inner { display:flex; align-items:center; height:56px; }
.brand { text-decoration:none; color:white; font-size:1.1rem; font-weight:600; }
.brand i { color:var(--coral); margin-right:6px; }
.brand b { color:var(--coral); }

.main { padding:48px 0 60px; }
.header { text-align:center; margin-bottom:28px; }
.header h1 { font-size:2.2rem; font-weight:800; color:var(--dark); }
.hl { color:var(--coral); }
.header p { color:var(--dim); max-width:500px; margin:8px auto 0; font-size:0.95rem; }

.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.card { background:var(--white); border:1px solid var(--border); border-radius:14px; padding:24px; margin-bottom:16px; }
.card h3 { font-size:1rem; font-weight:700; color:var(--dark); margin-bottom:10px; }
.card h3 i { color:var(--coral); margin-right:6px; }
.card p { font-size:0.85rem; color:var(--dim); margin-bottom:12px; line-height:1.5; }
.card code { background:rgba(244,63,94,0.06); color:var(--coral); padding:2px 6px; border-radius:3px; font-size:0.82rem; }
.hint-card { border-left:3px solid var(--coral); }

.file-zone { border:2px dashed var(--border); border-radius:10px; padding:28px; text-align:center; cursor:pointer; margin-bottom:12px; transition:border-color 0.2s; }
.file-zone:hover { border-color:var(--coral); }
.file-zone i { font-size:2rem; color:var(--dim); margin-bottom:8px; display:block; }
.file-zone p { font-size:0.85rem; color:var(--dim); }
.file-zone input { display:none; }

.card input[type=text] { width:100%; padding:12px 14px; border:1px solid var(--border); border-radius:10px; margin-bottom:12px; font-family:inherit; font-size:0.9rem; outline:none; }
.card input:focus { border-color:var(--coral); }

.btn { padding:12px 24px; border:none; border-radius:10px; font-weight:600; font-size:0.85rem; cursor:pointer; font-family:inherit; }
.btn.primary { background:var(--coral); color:white; }
.btn.primary:hover { background:var(--coral-dark); }
.btn.full { width:100%; }

.flag-row { display:flex; gap:10px; }
.flag-row input { flex:1; margin-bottom:0; }

.ok { margin-top:12px; padding:12px; background:rgba(22,163,74,0.06); border:1px solid rgba(22,163,74,0.2); border-radius:8px; color:var(--green); font-size:0.85rem; }
.ok pre { white-space:pre-wrap; word-break:break-all; font-size:0.8rem; }
.fail { margin-top:12px; padding:12px; background:rgba(220,38,38,0.06); border:1px solid rgba(220,38,38,0.2); border-radius:8px; color:var(--red); font-size:0.85rem; }
.fail pre { white-space:pre-wrap; }

@media(max-width:700px) { .grid-2{grid-template-columns:1fr;} .flag-row{flex-direction:column;} }