:root {
  --bg: #f4f6f9;
  --panel: #ffffff;
  --panel-2: #f7f9fc;
  --line: #e2e7ef;
  --line-soft: #eef2f7;
  --text: #10192b;
  --muted: #5d6b81;
  --faint: #8a97aa;
  --accent: #1b3a6b;
  --accent-soft: #e7edf6;
  --good: #0f9d58;
  --good-soft: #e6f5ec;
  --ok: #b7791f;
  --ok-soft: #fdf3e0;
  --bad: #c62828;
  --bad-soft: #fdeaea;
  --crit: #9b1c1c;
  --shadow: 0 1px 2px rgba(16, 25, 43, .05), 0 8px 24px rgba(16, 25, 43, .05);
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --panel: #151b24;
    --panel-2: #1b222d;
    --line: #262f3c;
    --line-soft: #1f2733;
    --text: #e7ecf3;
    --muted: #98a4b6;
    --faint: #6f7d92;
    --accent: #86a9dd;
    --accent-soft: #16233a;
    --good: #3ecf8e;
    --good-soft: #12291f;
    --ok: #e3b341;
    --ok-soft: #2a2312;
    --bad: #f2777a;
    --bad-soft: #2c1719;
    --crit: #ff5f56;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .25);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 1000px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .wrap { padding: 0 16px; } }

/* ---------- top bar ---------- */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 30;
}
.topbar .wrap { display: flex; align-items: center; gap: 12px; height: 62px; }
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: inherit; }
.mark {
  width: 30px; height: 30px; border-radius: 8px; flex: none;
  background: var(--accent); color: #fff;
  display: grid; place-content: center; font-weight: 700; font-size: 14px; letter-spacing: -.02em;
}
.brand-name { font-weight: 650; letter-spacing: -.01em; font-size: 15.5px; }
.brand-sub { color: var(--faint); font-size: 12.5px; margin-top: -2px; }
.topbar-spacer { flex: 1; }
.badge {
  font-size: 11px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  padding: 4px 10px; border-radius: 999px;
}

/* ---------- hero ---------- */
.hero { padding: 40px 0 26px; }
h1 { margin: 0; font-size: 30px; line-height: 1.2; letter-spacing: -.025em; font-weight: 680; }
@media (max-width: 640px) { h1 { font-size: 25px; } }
.sub { color: var(--muted); margin: 10px 0 0; max-width: 66ch; font-size: 15.5px; }
.hero-points { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; padding: 0; list-style: none; }
.hero-points li {
  font-size: 12.5px; color: var(--muted);
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 999px; padding: 5px 12px;
}
.hero-points b { color: var(--text); font-weight: 650; }

main { padding-bottom: 64px; display: grid; gap: 20px; }

/* ---------- panels ---------- */
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.panel-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
h3.section { margin: 0; font-size: 16.5px; letter-spacing: -.015em; font-weight: 650; }
.panel-note { color: var(--faint); font-size: 13px; margin: 0; }
.count-tag {
  font-size: 11.5px; font-weight: 700; color: var(--muted);
  background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 999px; padding: 2px 9px;
}

/* ---------- form ---------- */
.step { display: flex; align-items: center; gap: 9px; margin: 0 0 14px; flex-wrap: wrap; }
.step-num {
  width: 21px; height: 21px; border-radius: 50%; flex: none;
  background: var(--accent-soft); color: var(--accent);
  display: grid; place-content: center; font-size: 11.5px; font-weight: 700;
}
.step-label { font-size: 13px; font-weight: 650; letter-spacing: .01em; }
.step-hint { color: var(--faint); font-size: 12.5px; font-weight: 400; }
.step-block + .step-block { margin-top: 26px; padding-top: 24px; border-top: 1px solid var(--line-soft); }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; align-items: start; }
.row > .field + .field { margin-top: 0; }
@media (max-width: 640px) { .row > .field + .field { margin-top: 14px; } }
@media (max-width: 640px) { .row { grid-template-columns: 1fr; } }
.field { display: block; }
.field + .field { margin-top: 14px; }
.field > span { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.field em { color: var(--faint); font-weight: 400; font-style: normal; }
select, textarea, input[type=text] {
  width: 100%; background: var(--panel); color: var(--text);
  border: 1px solid var(--line); border-radius: 9px; padding: 10px 12px; font: inherit;
  transition: border-color .12s ease, box-shadow .12s ease;
}
textarea { resize: vertical; background: var(--panel-2); }
select:hover, textarea:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
select:focus, textarea:focus, .tab:focus-visible, button:focus-visible {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

.tabs {
  display: inline-flex; gap: 4px; padding: 3px; margin-bottom: 14px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 10px;
}
.tab {
  background: transparent; border: 0; color: var(--muted);
  padding: 7px 15px; border-radius: 7px; cursor: pointer; font: inherit; font-size: 13.5px; font-weight: 600;
}
.tab.active { background: var(--panel); color: var(--text); box-shadow: 0 1px 2px rgba(16,25,43,.12); }

.drop {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  border: 1.5px dashed var(--line); border-radius: 11px; padding: 34px 20px;
  text-align: center; cursor: pointer; background: var(--panel-2);
  transition: border-color .12s ease, background .12s ease;
}
.drop:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.drop input { display: none; }
.drop strong { font-weight: 620; }
.drop small { color: var(--faint); }
.filename { color: var(--accent); font-weight: 650; margin-top: 8px; font-size: 13.5px; }
.drop-alt { margin: 10px 0 0; font-size: 13px; color: var(--faint); text-align: center; }
.linkbtn {
  background: none; border: 0; padding: 0; font: inherit; font-size: 13px; font-weight: 600;
  color: var(--accent); cursor: pointer; text-decoration: underline; text-underline-offset: 2px;
}

.actions {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  margin-top: 24px; padding-top: 20px; border-top: 1px solid var(--line-soft); flex-wrap: wrap;
}
.check { color: var(--muted); font-size: 13.5px; display: flex; align-items: flex-start; gap: 8px; cursor: pointer; }
.check small { display: block; color: var(--faint); font-size: 12px; }
button.primary {
  background: var(--accent); color: #fff; border: 0; border-radius: 9px;
  padding: 11px 24px; font: inherit; font-weight: 650; cursor: pointer;
  transition: filter .12s ease;
}
button.primary:hover:not(:disabled) { filter: brightness(1.08); }
button.primary:disabled { opacity: .5; cursor: default; }
button.ghost {
  background: var(--panel); color: var(--text); border: 1px solid var(--line);
  border-radius: 8px; padding: 7px 14px; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
}
button.ghost:hover { border-color: var(--accent); color: var(--accent); }
.hidden { display: none !important; }
.error {
  color: var(--bad); background: var(--bad-soft);
  border: 1px solid color-mix(in srgb, var(--bad) 30%, transparent);
  border-radius: 9px; padding: 10px 14px; margin: 14px 0 0; font-size: 14px;
}

#loading { text-align: center; color: var(--muted); padding: 40px 24px; }
.spinner {
  width: 26px; height: 26px; margin: 0 auto 14px; border-radius: 50%;
  border: 3px solid var(--line); border-top-color: var(--accent);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
#loading-text { margin: 0; font-weight: 600; color: var(--text); }
#loading-sub { margin: 4px 0 0; font-size: 13px; color: var(--faint); }