:root {
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #e5e7eb;
  --page: #f3f4f6;
  --surface: #ffffff;
  --brand: #0f766e;
  --brand-ink: #ffffff;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font: 15px/1.55 "Malgun Gothic", "Apple SD Gothic Neo", "Noto Sans KR", system-ui, sans-serif;
  word-break: keep-all;
}

h1,
h2,
h3,
p {
  margin: 0;
}

.test-banner {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  padding: 6px 16px;
  background: #111827;
  color: #e5e7eb;
  font-size: 12px;
}

.test-banner a {
  color: #ffffff;
}

.site-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.logo {
  color: var(--brand);
  font-size: 20px;
  font-weight: 800;
}

main {
  display: grid;
  gap: 16px;
  max-width: 720px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card h2 {
  margin-bottom: 10px;
  font-size: 16px;
}

.card h3 {
  margin: 14px 0 6px;
  font-size: 14px;
}

.line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 4px 0;
}

.line-total {
  margin-top: 8px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-size: 18px;
  font-weight: 800;
}

.options {
  display: grid;
  gap: 8px;
}

.option {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.btn {
  padding: 12px 20px;
  background: var(--brand);
  border: 1px solid var(--brand);
  border-radius: 6px;
  color: var(--brand-ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.btn-secondary {
  background: var(--surface);
  color: var(--brand);
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 2px;
}

.result {
  margin-top: 12px;
  padding: 10px 12px;
  background: #ecfdf5;
  border-radius: 6px;
  color: #065f46;
}

.muted {
  color: var(--muted);
  font-size: 13px;
}

.steps {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 14px;
  list-style-position: inside;
}

.steps .current {
  color: var(--ink);
  font-weight: 700;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  background: rgba(17, 24, 39, 0.6);
}

.dialog {
  width: 100%;
  max-width: 400px;
  padding: 24px;
  background: var(--surface);
  border-radius: 12px;
}

.dialog h2 {
  margin-bottom: 8px;
  font-size: 18px;
}

.dialog p {
  margin-bottom: 16px;
}