* { margin:0; padding:0; box-sizing:border-box; }
:root { --bg:#0a0a0a; --bg2:#141414; --pink:#ec4899; --pink-d:#db2777; --white:#f5f5f5; --dim:#737373; --border:#262626; --green:#22c55e; --red:#ef4444; }
body { font-family:'Geist',sans-serif; background:var(--bg); color:var(--white); min-height:100vh; }
.container { max-width:800px; margin:0 auto; padding:0 20px; }
.nav { background:var(--bg2); border-bottom:1px solid var(--border); }
.nav-inner { display:flex; align-items:center; justify-content:space-between; height:54px; }
.brand { font-size:1.05rem; font-weight:700; }
.brand i { color:var(--pink); margin-right:6px; }
.brand b { color:var(--pink); }
.nav-link { text-decoration:none; color:var(--pink); font-size:0.85rem; font-weight:600; }

.page { padding:48px 0 60px; }
.hero { text-align:center; margin-bottom:24px; }
.chip { display:inline-block; padding:5px 14px; background:rgba(236,72,153,0.1); border:1px solid rgba(236,72,153,0.2); border-radius:100px; color:var(--pink); font-size:0.65rem; font-weight:700; letter-spacing:0.12em; margin-bottom:14px; }
.hero h1 { font-size:2.2rem; font-weight:800; }
.hl { color:var(--pink); }
.hero p { color:var(--dim); font-size:0.9rem; margin-top:8px; }
.hero code { background:rgba(236,72,153,0.1); color:var(--pink); padding:2px 6px; border-radius:3px; }

.card { background:var(--bg2); border:1px solid var(--border); border-radius:14px; padding:24px; margin-bottom:16px; }
.card h3 { font-size:0.95rem; margin-bottom:12px; }
.card h3 i { color:var(--pink); margin-right:6px; }
.tip-card { border-left:3px solid var(--pink); }
.tip-card ul { margin-left:16px; }
.tip-card li { font-size:0.85rem; color:var(--dim); margin-bottom:6px; line-height:1.5; }
.tip-card b { color:var(--white); }
.tip-card code { font-size:0.8rem; color:var(--pink); }
.tip-card a { color:var(--pink); }

textarea { width:100%; padding:14px; background:var(--bg); border:1px solid var(--border); border-radius:10px; color:var(--white); font-family:'Geist Mono',monospace; font-size:0.85rem; outline:none; resize:vertical; margin-bottom:12px; }
textarea:focus { border-color:var(--pink); }
.btn { padding:12px 24px; background:var(--pink); color:white; border:none; border-radius:10px; font-weight:600; font-size:0.85rem; cursor:pointer; font-family:inherit; }
.btn:hover { background:var(--pink-d); }
.btn.full { width:100%; }
.result { background:var(--bg); border:1px solid var(--border); border-radius:10px; padding:16px; margin-top:12px; font-family:'Geist Mono',monospace; font-size:0.8rem; color:var(--dim); overflow-x:auto; max-height:300px; white-space:pre-wrap; word-break:break-all; min-height:40px; }
.flag-row { display:flex; gap:10px; }
.flag-row input { flex:1; padding:12px 14px; background:var(--bg); border:1px solid var(--border); border-radius:10px; color:var(--white); font-size:0.9rem; outline:none; font-family:inherit; }
.ok { margin-top:12px; padding:12px; background:rgba(34,197,94,0.08); border:1px solid rgba(34,197,94,0.2); border-radius:8px; color:var(--green); font-weight:600; }
.fail { margin-top:12px; padding:12px; background:rgba(239,68,68,0.08); border:1px solid rgba(239,68,68,0.2); border-radius:8px; color:var(--red); }

@media(max-width:600px) { .flag-row{flex-direction:column;} }