/* ===================== tokens ===================== */
:root {
  --bg: #f3f6f5;
  --bg-glow-1: rgba(16, 163, 127, .16);
  --bg-glow-2: rgba(53, 99, 233, .08);
  --grid: rgba(14, 23, 22, .045);
  --card: #ffffff;
  --card-2: #f6f9f8;
  --line: #e2e8e6;
  --line-2: #d3dcd9;
  --text: #0d1715;
  --muted: #5b6966;
  --faint: #8a9794;
  --accent: #10a37f;
  --accent-hover: #0c8f6f;
  --accent-ink: #ffffff;
  --accent-soft: #e5f5f0;
  --accent-line: #b9e4d7;
  --warn: #a16207;
  --warn-soft: #fdf4e3;
  --danger: #c93a3a;
  --danger-soft: #fdeceb;
  --info: #2f5bd8;
  --info-soft: #ebf0fd;
  --shadow: 0 1px 2px rgba(13, 23, 21, .04), 0 18px 48px -18px rgba(13, 23, 21, .18);
  --radius: 20px;
  --radius-sm: 12px;
  --font: ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Roboto Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #090d0c;
    --bg-glow-1: rgba(16, 163, 127, .14);
    --bg-glow-2: rgba(80, 120, 255, .07);
    --grid: rgba(255, 255, 255, .035);
    --card: #111816;
    --card-2: #0c1311;
    --line: #1f2a27;
    --line-2: #2b3834;
    --text: #e8f0ed;
    --muted: #9aaaa6;
    --faint: #6d7d79;
    --accent: #19c295;
    --accent-hover: #2ad3a5;
    --accent-ink: #04130e;
    --accent-soft: rgba(25, 194, 149, .12);
    --accent-line: rgba(25, 194, 149, .35);
    --warn: #f0b44c;
    --warn-soft: rgba(240, 180, 76, .1);
    --danger: #ff7b7b;
    --danger-soft: rgba(255, 123, 123, .1);
    --info: #8eaaff;
    --info-soft: rgba(142, 170, 255, .1);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 24px 60px -20px rgba(0, 0, 0, .7);
  }
}

/* ===================== base ===================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 var(--font);
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code { font-family: var(--mono); font-size: .92em; background: var(--card-2); border: 1px solid var(--line); border-radius: 6px; padding: 0 5px; }
h1, h2 { margin: 0; letter-spacing: -.02em; }
h2 { font-size: 19px; line-height: 1.3; margin-bottom: 6px; }
.muted { color: var(--muted); margin: 0 0 18px; }
.mono { font-family: var(--mono); }

.backdrop {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(700px 420px at 50% -120px, var(--bg-glow-1), transparent 70%),
    radial-gradient(500px 360px at 95% 30%, var(--bg-glow-2), transparent 70%),
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 32px 32px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 32px 32px;
  mask-image: linear-gradient(to bottom, #000 0%, #000 55%, transparent 100%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, #000 55%, transparent 100%);
}

/* ===================== topbar ===================== */
.topbar {
  width: 100%; max-width: 1080px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px;
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font-weight: 650; font-size: 16px; }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: linear-gradient(140deg, var(--accent), #0a7d61); color: #fff;
  box-shadow: 0 6px 16px -6px rgba(16, 163, 127, .6);
}
.lang { display: inline-flex; padding: 3px; gap: 2px; border: 1px solid var(--line); background: var(--card); border-radius: 999px; }
.lang button {
  border: 0; background: transparent; color: var(--muted); font: 600 12px/1 var(--font);
  padding: 7px 11px; border-radius: 999px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--text); color: var(--bg); }

/* ===================== layout ===================== */
.wrap { width: 100%; max-width: 580px; margin: 0 auto; padding: 8px 16px 40px; flex: 1; }
.hero { text-align: center; margin: 18px 0 26px; }
.eyebrow {
  display: inline-block; font: 600 12px/1 var(--font); letter-spacing: .04em; color: var(--accent);
  background: var(--accent-soft); border: 1px solid var(--accent-line); padding: 6px 10px; border-radius: 999px; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(28px, 6vw, 38px); line-height: 1.12; font-weight: 750; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p { color: var(--muted); margin: 12px auto 0; max-width: 440px; }

.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 8px 8px 22px;
}

/* ===================== tabs ===================== */
.tabs { display: flex; gap: 4px; padding: 4px; background: var(--card-2); border: 1px solid var(--line); border-radius: 14px; }
.tab {
  flex: 1; min-width: 0; border: 0; background: transparent; color: var(--muted);
  font: 600 13.5px/1.2 var(--font); padding: 10px 8px; border-radius: 10px; cursor: pointer;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tab:hover { color: var(--text); }
.tab[aria-selected="true"] { background: var(--card); color: var(--text); box-shadow: 0 1px 2px rgba(0, 0, 0, .06), 0 0 0 1px var(--line); }
@media (max-width: 440px) {
  .tab { white-space: normal; font-size: 12.5px; line-height: 1.25; padding: 8px 4px; }
  .plan-chip .pc-code { display: none; }
}
.panel { padding: 22px 16px 0; }
@media (min-width: 520px) { .panel { padding: 24px 22px 0; } }

/* ===================== stepper ===================== */
.stepper { list-style: none; display: flex; align-items: center; gap: 8px; margin: 0 0 24px; padding: 0; }
.stepper li { display: flex; align-items: center; gap: 8px; color: var(--faint); font-size: 13px; font-weight: 600; flex: 1; }
.stepper li:last-child { flex: 0 0 auto; }
.stepper li:not(:last-child)::after { content: ""; flex: 1; height: 2px; border-radius: 2px; background: var(--line); }
.stepper .dot {
  display: grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  border: 2px solid var(--line-2); font-size: 12px; background: var(--card); flex: none;
}
.stepper li.active { color: var(--text); }
.stepper li.active .dot { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.stepper li.done { color: var(--muted); }
.stepper li.done .dot { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.stepper li.done::after { background: var(--accent); }
@media (max-width: 400px) { .stepper .lbl { display: none; } .stepper li.active .lbl { display: inline; } }

/* ===================== fields ===================== */
.field { position: relative; display: block; margin-bottom: 14px; }
.field-icon { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--faint); display: flex; }
input, textarea {
  width: 100%; font: inherit; color: var(--text); background: var(--card-2);
  border: 1.5px solid var(--line); border-radius: var(--radius-sm); outline: none;
  transition: border-color .15s, box-shadow .15s, background .15s;
}
input { height: 52px; padding: 0 14px 0 42px; font-size: 15px; letter-spacing: .02em; }
textarea { padding: 12px 14px; font-size: 13px; line-height: 1.5; resize: vertical; min-height: 96px; margin-bottom: 10px; display: block; }
input:focus, textarea:focus { border-color: var(--accent); background: var(--card); box-shadow: 0 0 0 4px var(--accent-soft); }
input::placeholder, textarea::placeholder { color: var(--faint); opacity: .8; }

/* ===================== buttons ===================== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 48px; padding: 0 20px; border-radius: var(--radius-sm); border: 1.5px solid transparent;
  font: 650 15px/1 var(--font); cursor: pointer; text-decoration: none; white-space: nowrap;
  transition: background .15s, transform .05s, opacity .15s, border-color .15s;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 20px -10px rgba(16, 163, 127, .7); }
.btn.primary:hover { background: var(--accent-hover); }
.btn.ghost { background: transparent; color: var(--muted); border-color: var(--line); }
.btn.ghost:hover { color: var(--text); border-color: var(--line-2); }
.btn.block { width: 100%; }
.btn[disabled] { opacity: .5; cursor: not-allowed; box-shadow: none; }
.btn .arrow { transition: transform .15s; }
.btn:hover:not([disabled]) .arrow { transform: translateX(3px); }
.btn.busy { pointer-events: none; opacity: .8; }
.btn.busy .arrow { display: none; }
.btn.busy::after {
  content: ""; width: 16px; height: 16px; border-radius: 50%;
  border: 2px solid currentColor; border-right-color: transparent; animation: spin .7s linear infinite;
}
.row { display: flex; gap: 10px; margin-top: 4px; }
.row .grow { flex: 1; }
@media (max-width: 420px) { .row { flex-direction: column-reverse; } .row .btn { width: 100%; } }

/* ===================== alerts & notes ===================== */
.alert {
  display: flex; gap: 10px; align-items: flex-start; padding: 11px 14px; margin: 0 0 14px;
  border-radius: var(--radius-sm); font-size: 14px; background: var(--danger-soft); color: var(--danger);
  border: 1px solid color-mix(in srgb, var(--danger) 25%, transparent);
}
.alert.warn { background: var(--warn-soft); color: var(--warn); border-color: color-mix(in srgb, var(--warn) 25%, transparent); }
.alert ul { margin: 6px 0 0; padding-left: 18px; }
.hint { font-size: 13px; color: var(--muted); margin: 0 0 16px; }

.plan-chip {
  display: flex; align-items: center; gap: 12px; padding: 12px 14px; margin-bottom: 18px;
  background: var(--accent-soft); border: 1px solid var(--accent-line); border-radius: 14px;
}
.plan-chip .pc-icon { display: grid; place-items: center; width: 36px; height: 36px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); flex: none; }
.plan-chip .pc-title { font-weight: 700; }
.plan-chip .pc-sub { font-size: 12.5px; color: var(--muted); }
.plan-chip .pc-code { margin-left: auto; font: 12px var(--mono); color: var(--muted); white-space: nowrap; }

.howto { margin: 10px 0 14px; padding: 0; list-style: none; counter-reset: s; }
.howto li { position: relative; padding: 0 0 10px 34px; font-size: 14px; counter-increment: s; }
.howto li::before {
  content: counter(s); position: absolute; left: 0; top: -1px; width: 22px; height: 22px; border-radius: 50%;
  display: grid; place-items: center; font-size: 12px; font-weight: 700; background: var(--card-2); border: 1px solid var(--line); color: var(--muted);
}
.howto a { font-weight: 600; word-break: break-all; }

.summary { margin: 0 0 16px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.summary > div { display: flex; justify-content: space-between; gap: 16px; padding: 11px 14px; background: var(--card-2); }
.summary > div + div { border-top: 1px solid var(--line); }
.summary dt { color: var(--muted); font-size: 13.5px; }
.summary dd { margin: 0; font-weight: 600; text-align: right; word-break: break-word; font-size: 14px; }

.notes { margin: 0 0 16px; padding: 0; list-style: none; }
.notes li { position: relative; padding: 0 0 8px 24px; font-size: 13.5px; color: var(--muted); }
.notes li::before { content: "!"; position: absolute; left: 0; top: 1px; width: 16px; height: 16px; border-radius: 50%; display: grid; place-items: center; font-size: 10px; font-weight: 800; background: var(--warn-soft); color: var(--warn); }

.check { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; margin: 0 0 16px; cursor: pointer; }
.check input { width: 18px; height: 18px; margin: 2px 0 0; padding: 0; flex: none; accent-color: var(--accent); }

/* ===================== progress / result ===================== */
.result { text-align: center; padding: 4px 0 6px; }
.result h2 { font-size: 21px; margin: 14px 0 6px; }
.result .muted { max-width: 420px; margin: 0 auto 18px; }
.result-icon {
  width: 64px; height: 64px; margin: 0 auto; border-radius: 50%; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent);
}
.result-icon.spin::before {
  content: ""; width: 30px; height: 30px; border-radius: 50%;
  border: 3px solid var(--accent-line); border-top-color: var(--accent); animation: spin .9s linear infinite;
}
.result-icon.ok { background: var(--accent); color: var(--accent-ink); box-shadow: 0 0 0 8px var(--accent-soft); animation: pop .35s ease-out; }
.result-icon.fail { background: var(--danger-soft); color: var(--danger); }
.result-icon.wait { background: var(--warn-soft); color: var(--warn); }

.track { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 6px; margin: 0 0 18px; padding: 0; }
.track li { font-size: 11.5px; color: var(--faint); text-align: center; padding-top: 12px; position: relative; line-height: 1.3; }
.track li::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 4px; border-radius: 4px; background: var(--line); }
.track li.done { color: var(--muted); }
.track li.done::before { background: var(--accent); }
.track li.current { color: var(--text); font-weight: 600; }
.track li.current::before { background: linear-gradient(90deg, var(--accent) 0%, var(--accent-line) 50%, var(--accent) 100%); background-size: 200% 100%; animation: shimmer 1.4s linear infinite; }
.track.failed li.current::before { background: var(--danger); animation: none; }

/* ===================== lookup ===================== */
.lookup { list-style: none; margin: 18px 0 0; padding: 0; display: grid; gap: 10px; }
.lookup li { border: 1px solid var(--line); background: var(--card-2); border-radius: 14px; padding: 12px 14px; }
.lookup .lk-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.lookup .lk-code { font: 600 13px var(--mono); }
.lookup .lk-meta { margin-top: 6px; font-size: 13px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 4px 14px; }
.badge { display: inline-flex; align-items: center; gap: 6px; font: 650 12px/1 var(--font); padding: 6px 9px; border-radius: 999px; white-space: nowrap; }
.badge::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge.ok { background: var(--accent-soft); color: var(--accent); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.fail { background: var(--danger-soft); color: var(--danger); }
.badge.info { background: var(--info-soft); color: var(--info); }
.badge.mute { background: var(--card); color: var(--muted); border: 1px solid var(--line); }

/* ===================== faq / footer ===================== */
.faq { margin-top: 40px; }
.faq h2 { font-size: 17px; margin-bottom: 12px; padding-left: 4px; }
.faq details { border: 1px solid var(--line); background: var(--card); border-radius: 14px; margin-bottom: 8px; }
.faq summary {
  cursor: pointer; padding: 14px 44px 14px 16px; font-weight: 600; font-size: 14.5px; list-style: none; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 16px; top: 50%; transform: translateY(-50%); font-size: 20px; color: var(--faint); font-weight: 400; }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin: 0; padding: 0 16px 16px; color: var(--muted); font-size: 14px; }

.footer {
  width: 100%; max-width: 580px; margin: 0 auto; padding: 18px 16px 28px;
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  color: var(--faint); font-size: 13px;
}
.support { display: inline-flex; align-items: center; gap: 8px; color: var(--text); font-weight: 600; padding: 8px 12px; border: 1px solid var(--line); background: var(--card); border-radius: 999px; }
.support:hover { text-decoration: none; border-color: var(--accent-line); }

.demo-banner {
  background: #1d1a08; color: #ffe58a; border-bottom: 1px solid #5b4d0d;
  font: 600 12.5px/1.4 var(--font); padding: 8px 16px; text-align: center;
}

/* ===================== motion ===================== */
.view { animation: fade .22s ease-out; }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: scale(1); opacity: 1; } }
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: 0 0; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }