:root {
  --bg: #f1f5f9;
  --card: #ffffff;
  --ink: #1e293b;
  --muted: #64748b;
  --faint: #94a3b8;
  --line: #e2e8f0;
  --ok: #047857;
  --ok-bg: #d1fae5;
  --ok-edge: #34d399;
  --warn-bg: #fef3c7;
  --warn-ink: #92400e;
  --expired-ink: #b45309;
  --expired-bg: #fde68a;
  --brand: #0284c7;
  --brand-dark: #0369a1;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo",
    "Malgun Gothic", "Noto Sans KR", Roboto, sans-serif;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

.container { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; }

a { color: var(--brand-dark); }

/* 키보드 접근: 콘텐츠로 건너뛰기 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 14px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

/* 포커스 표시 */
a:focus-visible,
button:focus-visible,
.code-copy:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
  border-radius: 6px;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

/* 헤더 */
.site-header { margin-bottom: 18px; }
.site-title { font-size: 1.6rem; font-weight: 800; margin: 0; display: flex; align-items: center; gap: 8px; }
.site-desc { margin: 6px 0 2px; color: var(--muted); font-size: .92rem; }
.site-desc-en { margin: 0; color: var(--faint); font-size: .8rem; }

.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 14px 0 4px; }
.badge {
  display: inline-flex; align-items: center;
  padding: 5px 12px; border-radius: 999px; font-size: .85rem; font-weight: 600;
}
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-total { background: #e2e8f0; color: var(--muted); }
.toolbar .spacer { margin-left: auto; }

/* 버튼 */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 16px;
  border: 0; border-radius: 10px; cursor: pointer;
  font-size: .9rem; font-weight: 600; font-family: inherit;
}
.btn-primary { background: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn[disabled] { opacity: .6; cursor: progress; }

/* 이용 방법 */
.howto {
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  padding: 12px 16px; margin: 16px 0 24px; font-size: .9rem; color: var(--ink);
}
.howto b { color: var(--brand-dark); }
.howto ol { margin: 6px 0 0; padding-left: 20px; }
.howto li { margin: 2px 0; }

/* 섹션 */
.section { margin-bottom: 28px; }
.section-head {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 10px;
  border-bottom: 1px solid var(--line); padding-bottom: 8px; margin-bottom: 12px;
}
.section-title { font-size: 1.15rem; font-weight: 700; margin: 0; }
.section-count { font-size: .85rem; color: var(--ok); font-weight: 600; }
.section-count .total { color: var(--faint); font-weight: 400; }
.source-link { font-size: .8rem; }
.section-updated { font-size: .75rem; color: var(--faint); margin-left: auto; }
.section-judge { font-size: .78rem; color: var(--faint); margin: -4px 0 12px; }

/* 알림/경고 */
.notice {
  background: var(--warn-bg); color: var(--warn-ink);
  padding: 10px 14px; border-radius: 10px; font-size: .85rem; margin-bottom: 12px;
}

/* 쿠폰 목록 */
.coupon-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.coupon {
  display: flex; align-items: center; gap: 12px;
  background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--ok-edge);
  border-radius: 12px; padding: 12px 14px; min-height: 72px;
}
.coupon--expired { background: #f8fafc; border-left-color: #cbd5e1; }
.coupon-body { flex: 1; min-width: 0; }
.coupon-top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }

.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 1.15rem; font-weight: 700; letter-spacing: .04em; color: #0f172a;
}
.code--expired { text-decoration: line-through; color: var(--faint); }

.code-copy {
  min-height: 32px; padding: 4px 10px;
  border: 1px solid #cbd5e1; background: #fff; border-radius: 8px;
  font-size: .78rem; color: var(--muted); cursor: pointer; font-family: inherit;
}
.code-copy:hover { background: #f1f5f9; }

.tag {
  font-size: .72rem; padding: 3px 8px; border-radius: 6px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 3px;
}
.tag-expired { background: var(--expired-bg); color: var(--expired-ink); }
.tag-event { background: #e2e8f0; color: var(--muted); }
.tag-source { background: #e0f2fe; color: var(--brand-dark); }

/* 상단 통합 요약 섹션 */
.section-summary {
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px 16px;
  margin-bottom: 30px;
}
.section-summary .section-title { color: var(--brand-dark); }

.coupon-meta { font-size: .85rem; color: var(--muted); margin-top: 3px; }
.coupon-meta .dim { color: var(--faint); }

/* 만료 쿠폰 접기 */
.expired-toggle { margin-top: 10px; }
.expired-toggle > summary {
  cursor: pointer; list-style: none; font-size: .85rem; color: var(--muted);
  padding: 8px 12px; background: #fff; border: 1px solid var(--line);
  border-radius: 10px; min-height: 40px; display: flex; align-items: center;
}
.expired-toggle > summary::-webkit-details-marker { display: none; }
.expired-toggle[open] > summary { margin-bottom: 8px; }
.empty { color: var(--faint); font-size: .9rem; padding: 12px 0; }

/* 푸터 */
.site-footer { margin-top: 28px; border-top: 1px solid var(--line); padding-top: 16px; }
.disclosure { font-size: .78rem; color: var(--muted); line-height: 1.6; }
.disclosure a { color: var(--brand-dark); }
.foot-note { font-size: .75rem; color: var(--faint); margin-top: 10px; }

@media (max-width: 480px) {
  .site-title { font-size: 1.4rem; }
  .section-updated { margin-left: 0; width: 100%; }
}