:root{
  --blue:#1f47e6;--blue-deep:#12256b;--ink:#0d1526;--gold:#f0a518;--gold-2:#d98b0a;
  --bg:#ffffff;--bg-soft:#f4f6fb;--line:#e5eaf2;--text:#141c2b;--muted:#5b6678;
  --card:#ffffff;--nav-bg:rgba(255,255,255,.85);--tag-bg:#eef2ff;--tag-bd:#dfe6ff;--field:#ffffff;
  --radius:16px;--radius-sm:11px;
  --shadow:0 18px 44px -20px rgba(19,37,107,.28);--shadow-sm:0 8px 24px -14px rgba(19,37,107,.22);
  --container:1120px;
  --font-d:"Sora",system-ui,sans-serif;--font-b:"Inter",system-ui,sans-serif;--font-m:"JetBrains Mono",ui-monospace,monospace;
  --c-dev:#1f47e6;--c-learn:#f0a518;--c-pdf:#e0574d;--c-img:#12b886;
}

[data-theme="dark"]{
  --blue:#5878ff;--bg:#080d1a;--bg-soft:#0d1428;--line:#1e2a48;--text:#e7ecf6;--muted:#94a3c0;
  --card:#101a33;--nav-bg:rgba(10,16,32,.8);--tag-bg:rgba(88,120,255,.12);--tag-bd:rgba(88,120,255,.26);--field:#0b1327;
  --shadow:0 20px 50px -22px rgba(0,0,0,.6);--shadow-sm:0 10px 26px -16px rgba(0,0,0,.55);
}

body{margin:0;font-family:var(--font-b);color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased;transition:background .4s,color .4s;display:flex;flex-direction:column;min-height:100vh}

:focus-visible{outline:3px solid var(--blue);outline-offset:2px;border-radius:6px}

.eyebrow{font-family:var(--font-m);font-size:.78rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);display:inline-flex;align-items:center;gap:.5em}

.btn{display:inline-flex;align-items:center;gap:.5em;font-family:var(--font-d);font-weight:600;font-size:.94rem;padding:.72em 1.25em;border-radius:var(--radius-sm);border:1px solid transparent;cursor:pointer;transition:transform .16s,box-shadow .16s,background .16s;white-space:nowrap}

.btn-sm{padding:.55em .9em;font-size:.86rem}

.nav-in{display:flex;align-items:center;justify-content:space-between;height:74px;gap:20px}

.brand{display:flex;align-items:center;gap:11px;font-family:var(--font-d);font-weight:800;font-size:1.26rem;letter-spacing:-.03em}

.brand img{height:40px}

.has-drop:hover .drop{opacity:1;visibility:visible;transform:translateY(0)}

.tgl{background:var(--card);border:1px solid var(--line);border-radius:10px;width:42px;height:42px;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text);transition:.18s}

.burger{display:none;background:var(--card);border:1px solid var(--line);border-radius:10px;width:42px;height:42px;cursor:pointer;align-items:center;justify-content:center}

/* TOOL HEADER */
.thead{border-bottom:1px solid var(--line);background:var(--bg-soft)}

.thead-in{padding:clamp(28px,4vw,44px) 0}

.crumb{font-family:var(--font-m);font-size:.75rem;letter-spacing:.05em;color:var(--muted);display:flex;gap:.5em;align-items:center;margin-bottom:16px;flex-wrap:wrap}

.crumb a:hover{color:var(--blue)}

.thead h1{font-size:clamp(1.7rem,3.4vw,2.4rem);font-weight:800;display:flex;align-items:center;gap:14px}

.thead .hic{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--accent,var(--blue));background:color-mix(in srgb,var(--accent,var(--blue)) 12%,transparent);border:1px solid color-mix(in srgb,var(--accent,var(--blue)) 24%,transparent);flex:none}

.thead .hic svg{width:26px;height:26px}

.thead p{color:var(--muted);margin:12px 0 0;font-size:1.04rem;max-width:640px}

/* TOOL BODY */
.tool-main{padding:clamp(30px,5vw,54px) 0 clamp(56px,8vw,88px);flex:1}

.box{max-width:860px;margin:0 auto}

.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:clamp(20px,3vw,28px)}

.panel+.panel{margin-top:18px}

.field{margin-bottom:16px}

.field:last-child{margin-bottom:0}

.lbl{font-family:var(--font-d);font-weight:600;font-size:.9rem;display:block;margin-bottom:8px}

.lbl .muted{color:var(--muted);font-weight:400;font-size:.82rem}

.inp,textarea,select{width:100%;font-family:var(--font-b);font-size:.96rem;padding:.8em .95em;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--field);color:var(--text);transition:.15s}

textarea{font-family:var(--font-m);font-size:.9rem;resize:vertical;min-height:140px;line-height:1.6}

.inp:focus,textarea:focus,select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 15%,transparent)}

.btnrow{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}

@media(max-width:600px){.grid2{grid-template-columns:1fr}}

.hintline{font-family:var(--font-m);font-size:.78rem;color:var(--muted);margin-top:10px}

.seg{display:inline-flex;background:var(--bg-soft);border:1px solid var(--line);border-radius:999px;padding:4px;gap:4px}

.seg button{border:0;background:none;font-family:var(--font-d);font-weight:600;font-size:.86rem;color:var(--muted);padding:.5em 1.1em;border-radius:999px;cursor:pointer;transition:.15s}

.seg button.on{background:var(--blue);color:#fff}

.out-actions{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;gap:10px}

.copy{font-family:var(--font-d);font-weight:600;font-size:.82rem;color:var(--blue);background:none;border:1px solid var(--line);border-radius:9px;padding:.4em .8em;cursor:pointer;display:inline-flex;align-items:center;gap:.4em;transition:.15s}

.copy:hover{border-color:var(--blue);background:var(--bg-soft)}

.copy svg{width:15px;height:15px}

.kv{display:grid;grid-template-columns:160px 1fr;gap:10px 18px}

@media(max-width:520px){.kv{grid-template-columns:1fr}}

.kv .k{color:var(--muted);font-family:var(--font-m);font-size:.82rem}

.kv .v{font-family:var(--font-m);font-size:.88rem;word-break:break-all}

.err{color:#e0574d;font-family:var(--font-m);font-size:.85rem;margin-top:10px}

.qrbox{display:flex;flex-direction:column;align-items:center;gap:18px}

.qrbox .frame{background:#fff;padding:18px;border-radius:14px;border:1px solid var(--line)}

.back-tools{display:inline-flex;align-items:center;gap:.5em;font-family:var(--font-d);font-weight:600;font-size:.9rem;color:var(--blue);margin-top:30px}

.back-tools svg{width:1em;height:1em}

.toast{position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;font-family:var(--font-d);font-weight:600;font-size:.9rem;padding:.8em 1.3em;border-radius:12px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transition:.25s;z-index:300;display:flex;align-items:center;gap:.5em}

.toast.show{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}

.toast svg{width:18px;height:18px;color:#28c840}

.footer{background:var(--ink);color:#c7cede;padding:56px 0 24px;margin-top:20px}

.f-in{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}

.f-in .fb{display:flex;align-items:center;gap:11px;font-family:var(--font-d);font-weight:800;font-size:1.2rem;color:#fff}

.f-in .fb img{height:36px}

.f-in .fb .hk{color:var(--gold)}

.f-in .fl{display:flex;gap:18px;flex-wrap:wrap}

.f-in .fl a{color:#c7cede;font-size:.92rem}

.f-in .fl a:hover{color:#fff}

.f-copy{border-top:1px solid rgba(255,255,255,.1);margin-top:26px;padding-top:18px;font-size:.82rem;color:#8a94a6;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

.f-copy .kv2{font-family:var(--font-m);font-size:.72rem}

@media(max-width:960px){.nav-links{display:none}.burger{display:flex}}

@media(max-width:640px){.container{padding:0 18px}}

.mmenu a{display:block;font-family:var(--font-d);font-weight:600;padding:13px 6px;border-bottom:1px solid var(--line);color:var(--text)}

.mmenu .btn{width:100%;justify-content:center;margin-top:18px}

@media(prefers-reduced-motion:reduce){*{transition:none!important}}