:root {
  --bg: #f4f5f2;
  --surface: #ffffff;
  --surface-2: #eef0ec;
  --text: #1b1f1d;
  --muted: #5d6662;
  --line: #dde1dc;
  --accent: #0d6e6e;
  --accent-ink: #ffffff;
  --accent-soft: #e0efee;
  --ok: #1f7a3d;
  --ok-soft: #e3f3e8;
  --warn: #8a5a00;
  --warn-soft: #fbf0d9;
  --bad: #b3261e;
  --bad-soft: #fbe4e2;
  --info: #3f5a8a;
  --info-soft: #e5ecf8;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgb(20 30 25 / 6%), 0 4px 16px rgb(20 30 25 / 5%);
  --font: -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Pretendard', 'Noto Sans KR', 'Malgun Gothic',
    system-ui, sans-serif;
  --mono: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111413;
    --surface: #1a1e1c;
    --surface-2: #232826;
    --text: #e8ece9;
    --muted: #9aa49f;
    --line: #2f3633;
    --accent: #4fb3b0;
    --accent-ink: #062322;
    --accent-soft: #173533;
    --ok: #6fcf8d;
    --ok-soft: #173322;
    --warn: #e6b450;
    --warn-soft: #3a2d10;
    --bad: #f2867d;
    --bad-soft: #3d1a17;
    --info: #9db5e6;
    --info-soft: #1d2840;
    --shadow: none;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.55 var(--font);
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a {
  color: var(--accent);
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 16px 72px;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid var(--line);
  padding-top: env(safe-area-inset-top);
}

.top-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 10px 16px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.phase {
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 1px 8px;
}

.tabs {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  margin-top: 8px;
  scrollbar-width: none;
}

.tabs a {
  flex: none;
  padding: 8px 12px 10px;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  border-bottom: 2px solid transparent;
}

.tabs a[aria-current='page'] {
  color: var(--text);
  border-bottom-color: var(--accent);
}

h1 {
  font-size: 22px;
  line-height: 1.3;
  margin: 8px 0 4px;
  letter-spacing: -0.01em;
}

h2 {
  font-size: 17px;
  margin: 0 0 10px;
}

h3 {
  font-size: 15px;
  margin: 0 0 6px;
}

p {
  margin: 0 0 8px;
}

.lead {
  color: var(--muted);
  margin-bottom: 16px;
}

.muted {
  color: var(--muted);
}

.small {
  font-size: 13px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  margin: 0 0 12px;
}

.card.flat {
  box-shadow: none;
  background: var(--surface-2);
}

.hero {
  display: grid;
  gap: 6px;
  border-left: 4px solid var(--line);
}

.hero.ok {
  border-left-color: var(--ok);
}

.hero.warn {
  border-left-color: var(--warn);
}

.hero.bad {
  border-left-color: var(--bad);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  border-radius: 999px;
  padding: 2px 10px;
  font-size: 13px;
  font-weight: 700;
  white-space: nowrap;
  background: var(--surface-2);
  color: var(--muted);
}

.badge.ok {
  background: var(--ok-soft);
  color: var(--ok);
}

.badge.warn {
  background: var(--warn-soft);
  color: var(--warn);
}

.badge.bad {
  background: var(--bad-soft);
  color: var(--bad);
}

.badge.info {
  background: var(--info-soft);
  color: var(--info);
}

.badge.accent {
  background: var(--accent-soft);
  color: var(--accent);
}

.callout {
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  margin: 0 0 12px;
  background: var(--info-soft);
  color: var(--text);
  font-size: 15px;
}

.callout.warn {
  background: var(--warn-soft);
}

.callout.bad {
  background: var(--bad-soft);
}

.callout.ok {
  background: var(--ok-soft);
}

dl.kv {
  display: grid;
  grid-template-columns: minmax(96px, 34%) 1fr;
  gap: 8px 12px;
  margin: 0;
}

dl.kv dt {
  color: var(--muted);
  font-size: 14px;
}

dl.kv dd {
  margin: 0;
  font-weight: 500;
}

ul.plain {
  margin: 4px 0 0;
  padding-left: 18px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.toolbar {
  margin-bottom: 12px;
}

.grow {
  flex: 1 1 220px;
  width: auto;
}

.spread {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms ease, transform 80ms ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
}

.btn.block {
  width: 100%;
}

.btn.small {
  min-height: 36px;
  padding: 6px 12px;
  font-size: 14px;
}

.btn[aria-pressed='true'] {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent);
}

.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 55%, transparent);
  outline-offset: 2px;
}

label.field {
  display: grid;
  gap: 6px;
  margin: 0 0 12px;
  font-weight: 600;
  font-size: 14px;
}

input[type='text'],
input[type='password'],
textarea,
select {
  width: 100%;
  min-height: 44px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-weight: 400;
}

textarea {
  min-height: 72px;
  resize: vertical;
}

.choices {
  display: grid;
  gap: 8px;
  margin: 0 0 12px;
}

.choice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  font-weight: 500;
  cursor: pointer;
}

.choice input {
  margin-top: 4px;
  accent-color: var(--accent);
}

.choice:has(input:checked) {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.variant {
  display: grid;
  gap: 10px;
}

.variant .outcomes {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.variant.tapped {
  border-color: var(--accent);
}

.code {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface-2);
  border-radius: 8px;
  padding: 8px 10px;
  word-break: break-all;
}

details {
  margin-top: 8px;
}

summary {
  cursor: pointer;
  color: var(--muted);
  font-weight: 600;
  font-size: 14px;
  padding: 4px 0;
}

.segmented {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface-2);
  border-radius: 12px;
  overflow-x: auto;
  margin: 0 0 12px;
}

.segmented button {
  flex: 1 0 auto;
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 600;
  font-size: 14px;
  padding: 8px 12px;
  border-radius: 9px;
  cursor: pointer;
}

.segmented button[aria-selected='true'] {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow);
}

.table-wrap {
  overflow-x: auto;
  margin: 0 -16px;
  padding: 0 16px;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 14px;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

td.nowrap {
  white-space: nowrap;
}

.probe-ok {
  color: var(--ok);
}

.probe-fail {
  color: var(--bad);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(20px + env(safe-area-inset-bottom));
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 20;
}

@media (min-width: 640px) {
  .wrap {
    padding-top: 24px;
  }

  h1 {
    font-size: 26px;
  }

  .grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 12px;
  }

  .grid-2 > .card {
    margin: 0;
  }
}

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