:root {
  --wq-primary: #3182f6;
  --wq-primary-dark: #1b64da;
  --wq-primary-soft: #e8f3ff;
  --wq-text: #191f28;
  --wq-text-2: #4e5968;
  --wq-text-3: #6b7684;
  --wq-line: #e5e8eb;
  --wq-bg: #f8f9fa;
  --wq-danger: #f04452;
  --wq-danger-soft: #ffeeee;
  --wq-warn: #b26a00;
  --wq-warn-soft: #fff6e5;
  --wq-ok: #0f8a5f;
  --wq-ok-soft: #e7f8f0;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--wq-bg);
  color: var(--wq-text);
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Apple SD Gothic Neo', 'Noto Sans KR', 'Malgun Gothic', sans-serif;
  font-size: 16px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

a { color: var(--wq-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.wq-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--wq-line);
}

.wq-header__inner {
  display: flex;
  align-items: center;
  gap: 20px;
  max-width: 1040px;
  margin: 0 auto;
  padding: 10px 20px;
}

.wq-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--wq-text);
  font-weight: 700;
  font-size: 17px;
}
.wq-logo:hover { text-decoration: none; }

.wq-nav { display: flex; gap: 16px; flex: 1; }
.wq-nav a { color: var(--wq-text-2); font-size: 15px; font-weight: 500; }
.wq-nav a:hover { color: var(--wq-text); text-decoration: none; }

.wq-btn {
  display: inline-block;
  padding: 13px 22px;
  border-radius: 12px;
  background: var(--wq-primary);
  color: #fff;
  font-weight: 600;
  font-size: 16px;
  text-align: center;
}
.wq-btn:hover { background: var(--wq-primary-dark); text-decoration: none; }
.wq-btn--small { padding: 8px 14px; border-radius: 10px; font-size: 14px; white-space: nowrap; }

.wq-main { max-width: 760px; margin: 0 auto; padding: 20px 20px 64px; }

.wq-breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
  color: var(--wq-text-3);
  font-size: 13px;
}
.wq-breadcrumb li + li::before { content: '/'; margin-right: 6px; color: #c5ccd3; }
.wq-breadcrumb a { color: var(--wq-text-3); }

.wq-article {
  background: #fff;
  border-radius: 20px;
  padding: 36px 32px;
}

.wq-eyebrow { margin: 0 0 8px; color: var(--wq-primary); font-size: 14px; font-weight: 600; }

.wq-article h1 { margin: 0 0 20px; font-size: 28px; line-height: 1.4; letter-spacing: -0.02em; }
.wq-article h2 { margin: 0 0 12px; font-size: 21px; line-height: 1.45; letter-spacing: -0.01em; }
.wq-article h3 { margin: 0 0 10px; font-size: 16px; }
.wq-article p { margin: 0 0 12px; color: var(--wq-text-2); }

.wq-answer {
  margin: 0 0 20px;
  padding: 18px 20px;
  border-radius: 14px;
  background: var(--wq-primary-soft);
}
.wq-answer p { margin: 0; color: var(--wq-text); font-size: 17px; }
.wq-answer .wq-answer__label { margin-bottom: 4px; color: var(--wq-primary); font-size: 13px; font-weight: 700; }

.wq-levels {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin: 0 0 8px;
}
.wq-level { padding: 12px 14px; border: 1px solid var(--wq-line); border-radius: 12px; }
.wq-level dt { color: var(--wq-text-3); font-size: 13px; }
.wq-level dd { margin: 4px 0 0; }
.wq-level__note { display: block; margin-top: 6px; color: var(--wq-text-3); font-size: 13px; line-height: 1.5; }

.wq-chip { display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 14px; font-weight: 600; }
.wq-chip--danger { background: var(--wq-danger-soft); color: var(--wq-danger); }
.wq-chip--warn { background: var(--wq-warn-soft); color: var(--wq-warn); }
.wq-chip--ok { background: var(--wq-ok-soft); color: var(--wq-ok); }
.wq-chip--muted { background: var(--wq-bg); color: var(--wq-text-3); }

.wq-section { margin-top: 36px; }

.wq-list { margin: 0 0 12px; padding-left: 20px; color: var(--wq-text-2); }
.wq-list li { margin-bottom: 6px; }

.wq-quote { margin: 0 0 12px; padding: 14px 18px; border-left: 3px solid var(--wq-primary); background: var(--wq-bg); border-radius: 0 12px 12px 0; }
.wq-quote blockquote { margin: 0; color: var(--wq-text); }
.wq-quote figcaption { margin-top: 6px; color: var(--wq-text-3); font-size: 13px; }

.wq-fineprint { color: var(--wq-text-3) !important; font-size: 13px; line-height: 1.6; }

.wq-compare { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.wq-compare__col { padding: 16px 18px; border-radius: 14px; }
.wq-compare__col ul { margin: 0; padding-left: 18px; }
.wq-compare__col li { margin-bottom: 8px; color: var(--wq-text); }
.wq-compare__col--avoid { background: var(--wq-danger-soft); }
.wq-compare__col--avoid h3 { color: var(--wq-danger); }
.wq-compare__col--better { background: var(--wq-ok-soft); }
.wq-compare__col--better h3 { color: var(--wq-ok); }

.wq-cta {
  margin-top: 36px;
  padding: 24px;
  border-radius: 16px;
  background: var(--wq-text);
  text-align: center;
}
.wq-cta .wq-cta__title { margin: 0 0 6px; color: #fff; font-size: 19px; font-weight: 700; }
.wq-cta .wq-cta__text { margin: 0 0 16px; color: #d1d6db; }

.wq-faq { border-bottom: 1px solid var(--wq-line); }
.wq-faq summary { padding: 14px 0; cursor: pointer; font-weight: 600; list-style: none; }
.wq-faq summary::-webkit-details-marker { display: none; }
.wq-faq summary::after { content: '+'; float: right; color: var(--wq-text-3); }
.wq-faq[open] summary::after { content: '−'; }
.wq-faq p { padding-bottom: 8px; }

.wq-related { margin: 0; padding: 0; list-style: none; }
.wq-related li { border-bottom: 1px solid var(--wq-line); }
.wq-related a { display: block; padding: 12px 0; color: var(--wq-text); font-weight: 500; }

.wq-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 0; padding: 0; list-style: none; }
.wq-card a {
  display: block;
  height: 100%;
  padding: 16px 18px;
  border: 1px solid var(--wq-line);
  border-radius: 14px;
  color: var(--wq-text);
}
.wq-card a:hover { border-color: var(--wq-primary); text-decoration: none; }
.wq-card strong { display: block; margin-bottom: 4px; font-size: 16px; line-height: 1.45; }
.wq-card span { display: block; color: var(--wq-text-3); font-size: 14px; line-height: 1.5; }
.wq-card--plain { padding: 16px 18px; border: 1px dashed var(--wq-line); border-radius: 14px; }
.wq-card--plain strong { color: var(--wq-text-3); }

.wq-btn--ghost { background: var(--wq-primary-soft); color: var(--wq-primary); font-size: 15px; padding: 10px 16px; }
.wq-btn--ghost:hover { background: var(--wq-primary-soft); color: var(--wq-primary-dark); }
.wq-tool { margin: 12px 0 0; }
.wq-steps { margin: 0 0 8px; padding-left: 22px; }
.wq-steps li { margin-bottom: 8px; color: var(--wq-text); }
.wq-tag {
  display: inline-block;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 6px;
  background: var(--wq-bg);
  color: var(--wq-text-3);
  font-size: 12px;
  font-weight: 600;
  vertical-align: middle;
}
.wq-quote--example { border-left-color: var(--wq-line); }
.wq-table--levels th:first-child { width: 56px; white-space: nowrap; text-align: center; }
.wq-doc-sample { padding: 20px 22px; border: 1px solid var(--wq-line); border-radius: 14px; background: #fff; }
.wq-doc-sample p { color: var(--wq-text); }
.wq-doc-sample .wq-doc-sample__title { margin: 0 0 12px; font-size: 18px; font-weight: 700; text-align: center; }
.wq-doc-sample .wq-table-wrap { margin: 12px 0 0; }
.wq-nowrap { white-space: nowrap; }
.wq-table--rubric th[scope="row"] { width: 5.5em; word-break: keep-all; }
.wq-rubric-levels { margin: 0; padding: 0; list-style: none; }
.wq-rubric-levels li { margin-bottom: 6px; color: var(--wq-text); line-height: 1.55; }
.wq-rubric-levels strong { display: inline-block; margin-right: 4px; color: var(--wq-primary); font-size: 14px; }
.wq-table tfoot th, .wq-table tfoot td { font-weight: 700; border-bottom: none; }

.wq-notice { margin: 20px 0 0; padding: 16px 20px; border-radius: 14px; background: var(--wq-warn-soft); }
.wq-notice .wq-notice__title { margin: 0 0 6px; color: var(--wq-warn); font-weight: 700; }
.wq-notice p, .wq-notice li { color: var(--wq-text); }
.wq-notice .wq-list { margin: 0; }

.wq-table-wrap { overflow-x: auto; margin: 0 0 16px; }
.wq-table { width: 100%; border-collapse: collapse; font-size: 15px; }
.wq-table caption { padding-bottom: 8px; color: var(--wq-text-3); font-size: 13px; text-align: left; }
.wq-table th, .wq-table td { padding: 10px 12px; border-bottom: 1px solid var(--wq-line); text-align: left; vertical-align: top; }
.wq-table thead th { background: var(--wq-bg); color: var(--wq-text-2); font-size: 14px; font-weight: 600; }
.wq-limit strong { display: block; font-size: 17px; }
.wq-limit__bytes { color: var(--wq-text-3); font-size: 13px; }

.wq-calc { padding: 20px; border: 1px solid var(--wq-line); border-radius: 16px; background: #fff; }
.wq-calc__label { display: block; margin: 0 0 6px; color: var(--wq-text-2); font-size: 14px; font-weight: 600; }
.wq-calc__select, .wq-calc__input {
  width: 100%;
  margin-bottom: 14px;
  padding: 12px 14px;
  border: 1px solid #d1d6db;
  border-radius: 12px;
  background: #fff;
  color: var(--wq-text);
  font: inherit;
}
.wq-calc__input { resize: vertical; min-height: 160px; }
.wq-calc__select:focus, .wq-calc__input:focus { outline: 2px solid var(--wq-primary); outline-offset: 1px; border-color: transparent; }
.wq-calc__result { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.wq-calc__result div { padding: 12px; border-radius: 12px; background: var(--wq-bg); text-align: center; }
.wq-calc__result span { display: block; color: var(--wq-text-3); font-size: 13px; }
.wq-calc__result strong { font-size: 22px; font-variant-numeric: tabular-nums; }
.wq-calc__bar { height: 8px; margin: 12px 0 8px; border-radius: 999px; background: var(--wq-line); overflow: hidden; }
.wq-calc__bar span { display: block; width: 0; height: 100%; background: var(--wq-primary); transition: width 0.15s ease; }
.wq-calc[data-state='over'] .wq-calc__bar span { background: var(--wq-danger); }
.wq-calc__status { margin: 0 0 6px !important; font-weight: 600; color: var(--wq-text) !important; }
.wq-calc[data-state='over'] .wq-calc__status { color: var(--wq-danger) !important; }

.wq-meta { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--wq-line); }
.wq-meta p { color: var(--wq-text-3); font-size: 13px; }

.wq-footer { padding: 28px 20px 40px; color: var(--wq-text-3); font-size: 13px; }
.wq-footer__inner { max-width: 760px; margin: 0 auto; }
.wq-footer__links { display: flex; flex-wrap: wrap; gap: 14px; }
.wq-footer a { color: var(--wq-text-2); }

@media (max-width: 720px) {
  .wq-nav { display: none; }
  .wq-header__inner { justify-content: space-between; }
  .wq-main { padding: 12px 12px 48px; }
  .wq-article { padding: 26px 20px; border-radius: 16px; }
  .wq-article h1 { font-size: 24px; }
  .wq-article h2 { font-size: 19px; }
  .wq-levels, .wq-compare, .wq-cards { grid-template-columns: 1fr; }
}