:root {
  --sw: 230px;
  --th: 58px;
  --primary: #0369a1;
  --primary-h: #0284c7;
  --primary-l: #e0f2fe;
  --side-bg: #0f172a;
  --side-txt: #94a3b8;
  --side-active-bg: rgba(14,165,233,.15);
  --side-active: #38bdf8;
  --bg: #f1f5f9;
  --card: #fff;
  --border: #e2e8f0;
  --txt: #0f172a;
  --muted: #64748b;
  --green: #16a34a; --green-l: #dcfce7;
  --red: #dc2626;   --red-l: #fee2e2;
  --orange: #d97706; --orange-l: #fef3c7;
  --blue: #2563eb;  --blue-l: #dbeafe;
  --r: 8px;
  --sh: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.04);
}

*,*::before,*::after { box-sizing:border-box; margin:0; padding:0; }
body { font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif; background:var(--bg); color:var(--txt); font-size:14px; }
a { text-decoration:none; }
code { font-family:'SF Mono','Fira Code',monospace; background:#f1f5f9; padding:1px 5px; border-radius:4px; font-size:12px; }

/* ── Layout ── */
.layout { display:flex; min-height:100vh; }

/* ── Sidebar ── */
.sidebar { width:var(--sw); background:var(--side-bg); position:fixed; top:0; left:0; bottom:0; display:flex; flex-direction:column; overflow-y:auto; z-index:50; }
.logo { display:flex; align-items:center; gap:10px; padding:18px 16px; border-bottom:1px solid rgba(255,255,255,.07); }
.logo-icon { font-size:22px; }
.logo-text { font-size:15px; font-weight:700; color:#f8fafc; }
.logo-sub { font-size:10px; color:#475569; margin-top:1px; }
.nav { padding:6px 0; flex:1; }
.nav-label { padding:14px 16px 4px; font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.08em; color:#334155; }
.nav-item { display:flex; align-items:center; gap:9px; padding:8px 16px; color:var(--side-txt); font-size:13.5px; border-left:3px solid transparent; transition:all .12s; cursor:pointer; }
.nav-item:hover { background:rgba(255,255,255,.05); color:#cbd5e1; }
.nav-item.active { background:var(--side-active-bg); color:var(--side-active); border-left-color:#38bdf8; }
.nav-icon { font-size:15px; width:18px; text-align:center; }

/* ── Main ── */
.main { margin-left:var(--sw); flex:1; display:flex; flex-direction:column; }
.topbar { height:var(--th); background:var(--card); border-bottom:1px solid var(--border); display:flex; align-items:center; justify-content:space-between; padding:0 24px; position:sticky; top:0; z-index:10; }
.page-title { font-size:16px; font-weight:600; }
.api-status { display:flex; align-items:center; gap:7px; font-size:12px; color:var(--muted); }
.status-dot { width:8px; height:8px; border-radius:50%; background:#94a3b8; transition:all .3s; }
.status-dot.online { background:var(--green); box-shadow:0 0 0 3px var(--green-l); }
.status-dot.offline { background:var(--red); box-shadow:0 0 0 3px var(--red-l); }
.content { padding:22px; flex:1; }

/* ── Cards ── */
.card { background:var(--card); border:1px solid var(--border); border-radius:var(--r); padding:20px; margin-bottom:16px; box-shadow:var(--sh); }
.card-title { font-size:14px; font-weight:600; margin-bottom:4px; }
.card-desc { font-size:13px; color:var(--muted); line-height:1.55; }

/* ── Grid ── */
.g2 { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.g3 { display:grid; grid-template-columns:1fr 1fr 1fr; gap:16px; }

/* ── Hero ── */
.hero { background:linear-gradient(135deg,#0f172a 0%,#1e3a5f 100%); border-radius:var(--r); padding:28px 32px; color:#fff; margin-bottom:20px; position:relative; overflow:hidden; }
.hero::after { content:'💳'; position:absolute; right:28px; top:50%; transform:translateY(-50%); font-size:72px; opacity:.12; pointer-events:none; }
.hero-tag { font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.12em; color:#38bdf8; margin-bottom:7px; }
.hero-title { font-size:24px; font-weight:800; margin-bottom:7px; }
.hero-sub { font-size:13px; color:#94a3b8; line-height:1.65; max-width:480px; }

/* ── Stat cards ── */
.stat { background:var(--card); border:1px solid var(--border); border-radius:var(--r); padding:18px 20px; }
.stat-label { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:var(--muted); }
.stat-value { font-size:28px; font-weight:700; margin:6px 0 3px; color:var(--txt); }
.stat-desc { font-size:12px; color:var(--muted); }

/* ── Badges ── */
.badge { display:inline-flex; align-items:center; padding:2px 7px; border-radius:4px; font-size:10px; font-weight:700; letter-spacing:.06em; text-transform:uppercase; }
.get  { background:var(--green-l); color:var(--green); }
.post { background:var(--blue-l);  color:var(--blue); }
.put  { background:var(--orange-l);color:var(--orange); }
.del  { background:var(--red-l);   color:var(--red); }

/* ── Info box ── */
.info { background:var(--blue-l); border-left:4px solid var(--blue); border-radius:0 var(--r) var(--r) 0; padding:11px 15px; font-size:13px; color:#1e40af; line-height:1.6; margin-bottom:16px; }

/* ── Forms ── */
.fg { margin-bottom:13px; }
.fl { display:block; font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.04em; color:var(--muted); margin-bottom:5px; }
.fl span { color:var(--red); }
.fi,.fs,.ft { width:100%; padding:8px 11px; border:1px solid var(--border); border-radius:6px; font-size:13px; color:var(--txt); background:#fff; outline:none; transition:border-color .15s, box-shadow .15s; font-family:inherit; }
.fi:focus,.fs:focus,.ft:focus { border-color:var(--primary); box-shadow:0 0 0 3px rgba(3,105,161,.1); }
.ft { resize:vertical; min-height:70px; }
.fh { font-size:11px; color:var(--muted); margin-top:3px; }
.fr { display:grid; grid-template-columns:1fr 1fr; gap:12px; }

/* ── Buttons ── */
.btn { display:inline-flex; align-items:center; gap:5px; padding:8px 15px; border-radius:6px; font-size:13px; font-weight:500; cursor:pointer; border:none; transition:all .12s; font-family:inherit; }
.btn-p { background:var(--primary); color:#fff; }
.btn-p:hover { background:var(--primary-h); }
.btn-o { background:transparent; border:1px solid var(--border); color:var(--txt); }
.btn-o:hover { background:var(--bg); }
.btn-r { background:var(--red); color:#fff; }
.btn-r:hover { background:#b91c1c; }
.btn-g { background:var(--green); color:#fff; }
.btn-g:hover { background:#15803d; }
.btn-w { width:100%; justify-content:center; }
.btn:disabled { opacity:.5; cursor:not-allowed; }

/* ── Tabs ── */
.tabs { display:flex; gap:4px; background:#e2e8f0; border-radius:10px; padding:4px; margin-bottom:18px; flex-wrap:wrap; }
.tab { padding:9px 18px; border-radius:7px; font-size:13px; font-weight:500; color:var(--muted); cursor:pointer; background:transparent; transition:all .15s; white-space:nowrap; user-select:none; }
.tab:hover { background:rgba(255,255,255,.6); color:var(--txt); }
.tab.active { background:#fff; color:var(--primary); font-weight:700; box-shadow:0 1px 4px rgba(0,0,0,.12); }
.tp { display:none; }
.tp.active { display:block; }

/* ── Response box ── */
.rl { font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:var(--muted); margin-bottom:6px; margin-top:16px; }
.rb { background:#0f172a; border-radius:var(--r); padding:14px 16px; font-family:'SF Mono','Fira Code',monospace; font-size:12px; line-height:1.65; color:#e2e8f0; overflow:auto; max-height:380px; white-space:pre-wrap; word-break:break-word; min-height:60px; }
.rb.empty { color:#475569; font-style:italic; }
.jk { color:#7dd3fc; }
.js { color:#86efac; }
.jn { color:#fbbf24; }
.jb { color:#f472b6; }
.jl { color:#94a3b8; }
.rs { color:#22c55e; font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; margin-bottom:6px; }
.re { color:#ef4444; font-size:10px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; margin-bottom:6px; }

/* ── Table ── */
.tw { overflow-x:auto; }
table { width:100%; border-collapse:collapse; font-size:13px; }
th { text-align:left; padding:8px 12px; background:var(--bg); border-bottom:1px solid var(--border); font-weight:700; font-size:11px; text-transform:uppercase; letter-spacing:.05em; color:var(--muted); }
td { padding:9px 12px; border-bottom:1px solid var(--border); }
tr:last-child td { border-bottom:none; }
tr:hover td { background:#f8fafc; }

/* ── Flow ── */
.flow { display:flex; flex-wrap:wrap; align-items:center; gap:0; margin:14px 0; }
.fb { background:var(--primary-l); border:1px solid #bae6fd; border-radius:6px; padding:7px 12px; font-size:11px; font-weight:700; color:var(--primary); text-align:center; white-space:nowrap; }
.fa { padding:0 7px; color:var(--muted); font-size:14px; }

/* ── Endpoint list ── */
.ep { display:flex; align-items:center; gap:9px; padding:9px 12px; border:1px solid var(--border); border-radius:6px; margin-bottom:7px; background:#fff; }
.ep code { flex:1; font-size:12px; }
.ep-d { font-size:12px; color:var(--muted); }

/* ── Section line ── */
.sl { font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:.05em; color:var(--muted); margin-bottom:10px; padding-bottom:7px; border-bottom:1px solid var(--border); }

/* ── Loading ── */
.loading { display:flex; align-items:center; gap:8px; color:var(--muted); font-size:13px; padding:24px; }
.spinner { width:15px; height:15px; border:2px solid var(--border); border-top-color:var(--primary); border-radius:50%; animation:spin .8s linear infinite; }
@keyframes spin { to { transform:rotate(360deg); } }

/* ── Split guide (always-visible info card) ── */
.split-guide { background:linear-gradient(135deg,#eff6ff 0%,#f0fdf4 100%); border:1px solid #bfdbfe; border-radius:var(--r); padding:16px 20px; margin-bottom:16px; }
.split-guide-hdr { font-size:14px; font-weight:700; color:#1e40af; margin-bottom:12px; display:flex; align-items:center; gap:8px; }
.split-guide-body { display:grid; grid-template-columns:1fr 1fr 1fr; gap:20px; font-size:13px; line-height:1.65; color:#1e3a5f; }
.split-guide-body strong { color:#0f172a; }
.split-ex { display:flex; justify-content:space-between; align-items:center; background:#dbeafe; border-radius:4px; padding:4px 10px; margin:4px 0; font-size:12px; font-family:'SF Mono','Fira Code',monospace; }
.split-ex span:last-child { font-weight:700; color:#1d4ed8; }
@media(max-width:768px){ .split-guide-body { grid-template-columns:1fr; } }

/* ── Split payment ── */
.split-box { background:#f8fafc; border:1px solid var(--border); border-radius:var(--r); padding:14px 16px; margin-top:14px; }
.split-box-hdr { display:flex; align-items:flex-start; justify-content:space-between; gap:12px; }
.split-how { font-size:12px; color:#1e40af; background:var(--blue-l); border-radius:5px; padding:9px 12px; line-height:1.6; margin-bottom:12px; }
.split-row { display:grid; grid-template-columns:1fr 1fr 110px 32px; gap:6px; margin-bottom:6px; align-items:center; }
.split-del { width:32px; height:32px; border:1px solid var(--border); border-radius:5px; background:#fff; cursor:pointer; font-size:12px; color:var(--red); display:flex; align-items:center; justify-content:center; }
.split-del:hover { background:var(--red-l); }
/* Toggle switch */
.split-toggle { position:relative; display:inline-block; width:40px; height:22px; flex-shrink:0; }
.split-toggle input { opacity:0; width:0; height:0; }
.split-slider { position:absolute; cursor:pointer; inset:0; background:#cbd5e1; border-radius:22px; transition:.2s; }
.split-slider::before { content:''; position:absolute; width:16px; height:16px; left:3px; bottom:3px; background:#fff; border-radius:50%; transition:.2s; }
.split-toggle input:checked + .split-slider { background:var(--primary); }
.split-toggle input:checked + .split-slider::before { transform:translateX(18px); }

/* ── Section divider ── */
.sec-divider {
  display:flex; align-items:baseline; gap:8px;
  font-size:13px; font-weight:700; color:var(--txt);
  margin:22px 0 10px;
  padding-bottom:8px;
  border-bottom:2px solid var(--primary);
}
.sec-divider span { font-size:12px; font-weight:400; color:var(--muted); }

/* ── Details toggle ── */
details summary { cursor:pointer; font-size:12px; color:var(--muted); padding:6px 0; user-select:none; }
details summary:hover { color:var(--txt); }
details[open] summary { margin-bottom:10px; }