/* ============================================================
   style.css  –  트위터(X) 주간 랭킹 사이트
   심플 SaaS 대시보드 스타일 / 반응형
   ============================================================ */

/* ── 1. 리셋 & 기본 설정 ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  /* 포인트 컬러 (파란색 계열 단일 사용) */
  --color-primary:       #2563eb;
  --color-primary-light: #eff6ff;
  --color-primary-hover: #1d4ed8;

  /* 중립 컬러 */
  --color-bg:       #f8fafc;
  --color-surface:  #ffffff;
  --color-border:   #e2e8f0;
  --color-text:     #1e293b;
  --color-muted:    #64748b;
  --color-subtle:   #94a3b8;

  /* 변동 컬러 */
  --color-up:   #16a34a;
  --color-down: #dc2626;

  /* 그림자 */
  --shadow-sm: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md: 0 4px 12px rgba(0,0,0,.07);

  /* 간격 */
  --radius: 10px;
  --gap:    24px;

  /* 폰트 – 시스템 폰트 스택 */
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
}

html {
  scroll-behavior: smooth; /* 부드러운 스크롤 */
}

body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

/* ── 2. 레이아웃 컨테이너 ── */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── 3. HERO 영역 ── */
.hero {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 48px 0 40px;
}

.hero__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--gap);
  justify-content: space-between;
}

.hero__title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: 8px;
}

.hero__desc {
  font-size: 0.95rem;
  color: var(--color-muted);
  line-height: 1.7;
}

/* 데스크톱에서만 줄바꿈 표시 */
.br-desktop { display: none; }

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  flex-shrink: 0;
}

/* ── 4. 버튼 ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: background-color .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}

.btn--primary {
  background-color: var(--color-primary);
  color: #fff;
}
.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-primary-hover);
  box-shadow: 0 0 0 3px rgba(37,99,235,.25);
  outline: none;
}

.btn--secondary {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(37,99,235,.15);
  outline: none;
}

/* ── 5. 섹션 공통 ── */
main .container > section,
.kpi-section,
.ranking-section,
.rules-section,
.submit-section,
.flow-section {
  margin: 36px auto;
  max-width: 960px;
  padding: 0 20px;
}

/* main 내부 섹션은 container 없이 직접 배치 */
main > section {
  margin: 36px 0;
}

.section-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--color-text);
}

/* ── 6. KPI 카드 ── */
.kpi-section {
  margin-top: 32px;
}

.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 24px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  text-align: center;
}

.kpi-card__icon {
  font-size: 1.5rem;
  line-height: 1;
}

.kpi-card__value {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.kpi-card__label {
  font-size: 0.8rem;
  color: var(--color-muted);
}

/* ── 7. 랭킹 테이블 ── */
.ranking-section {
  margin-top: 12px;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.section-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--color-subtle);
}

.divider { user-select: none; }

.week-label {
  font-weight: 600;
  color: var(--color-muted);
}

.score-formula {
  font-size: 0.82rem;
  color: var(--color-muted);
  background: var(--color-primary-light);
  border: 1px solid #bfdbfe;
  border-radius: 6px;
  display: inline-block;
  padding: 5px 12px;
  margin-bottom: 16px;
}

/* 로딩 / 에러 상태 */
.table-status {
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 12px 0;
  min-height: 20px;
}

/* 가로 스크롤 래퍼 */
.table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
}

.ranking-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  min-width: 560px;
}

/* 헤더 – 진하게 */
.ranking-table thead {
  background: linear-gradient(to bottom, #1e40af, #2563eb);
}

.ranking-table thead tr {
  border-bottom: none;
}

.ranking-table th {
  padding: 13px 18px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #fff;
  text-align: left;
  white-space: nowrap;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* 숫자 헤더 오른쪽 정렬 */
.ranking-table th:nth-child(3),
.ranking-table th:nth-child(4),
.ranking-table th:nth-child(5),
.ranking-table th:nth-child(6) {
  text-align: right;
}

/* 변동 헤더 가운데 정렬 */
.ranking-table th:nth-child(7) {
  text-align: center;
}

/* tbody 줄무늬 (짝수 행 연한 배경) */
.ranking-table tbody tr:nth-child(even) {
  background-color: #f8fafc;
}

.ranking-table tbody tr:nth-child(odd) {
  background-color: #ffffff;
}

/* 행 hover */
.ranking-table tbody tr:hover {
  background-color: #eff6ff;
  transition: background-color .1s ease;
}

/* 1위 행 특별 강조 */
.ranking-table tbody tr.rank-first {
  background: linear-gradient(to right, #fffbeb, #ffffff);
  border-left: 3px solid #f59e0b;
}
.ranking-table tbody tr.rank-first:hover {
  background: linear-gradient(to right, #fef3c7, #eff6ff);
}

.ranking-table td {
  padding: 15px 18px;
  font-size: 0.92rem;
  color: var(--color-text);
  border-top: 1px solid var(--color-border);
  white-space: nowrap;
  vertical-align: middle;
}

/* 순위 배지 */
.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  font-size: 0.9rem;
  font-weight: 800;
}

.rank-badge--gold   {
  background: linear-gradient(135deg, #fde68a, #f59e0b);
  color: #78350f;
  box-shadow: 0 2px 6px rgba(245,158,11,.35);
}
.rank-badge--silver {
  background: linear-gradient(135deg, #e2e8f0, #94a3b8);
  color: #1e293b;
  box-shadow: 0 2px 6px rgba(148,163,184,.3);
}
.rank-badge--bronze {
  background: linear-gradient(135deg, #fed7aa, #f97316);
  color: #7c2d12;
  box-shadow: 0 2px 6px rgba(249,115,22,.3);
}
.rank-badge--normal {
  background: #f1f5f9;
  color: var(--color-muted);
}

/* 계정 정보 셀 */
.account-handle {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
}
.account-status {
  font-size: 0.75rem;
  color: var(--color-subtle);
  margin-top: 2px;
}

/* 숫자 컬럼 – 굵고 오른쪽 정렬 */
.num-cell {
  font-weight: 700;
  font-size: 0.95rem;
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--color-text);
}

/* 점수 컬럼 강조 */
.score-cell {
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
  text-align: right;
  letter-spacing: -0.01em;
}

/* 변동 컬럼 */
.change-cell {
  font-weight: 700;
  font-size: 0.88rem;
  text-align: center;
  min-width: 52px;
}
.change-up   { color: var(--color-up); }
.change-down { color: var(--color-down); }
.change-none { color: var(--color-subtle); }

/* ── 8. 제출 규칙 카드 ── */
.rules-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.rule-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 24px 20px;
}

.rule-card__number {
  display: block;
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-primary-light);
  /* 수치 테두리 강조 */
  -webkit-text-stroke: 1.5px var(--color-primary);
  margin-bottom: 10px;
}

.rule-card__title {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.rule-card__desc {
  font-size: 0.85rem;
  color: var(--color-muted);
  line-height: 1.65;
}

/* ── 9. 제출 항목 리스트 ── */
.submit-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.submit-list__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  padding: 16px 20px;
}

.submit-list__icon {
  font-size: 1.2rem;
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: 8px;
  font-weight: 700;
  color: var(--color-primary);
}

.submit-list__item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 2px;
}

.submit-list__item p {
  font-size: 0.83rem;
  color: var(--color-muted);
}

/* ── 10. 운영 흐름 ── */
.flow-desc {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 20px;
}

.flow-steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

/* 세로선 연결 */
.flow-steps::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 28px;
  bottom: 28px;
  width: 2px;
  background: var(--color-border);
  border-radius: 2px;
}

.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 0;
  position: relative;
}

.flow-step__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 800;
  font-size: 0.9rem;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.flow-step__body strong {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 3px;
}

.flow-step__body p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

/* ── 11. 푸터 ── */
.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 28px 0;
  text-align: center;
  margin-top: 48px;
}

.footer p {
  font-size: 0.85rem;
  color: var(--color-muted);
}

.footer__sub {
  font-size: 0.78rem;
  color: var(--color-subtle);
  margin-top: 4px;
}

/* ── 12. 반응형 ── */

/* 태블릿 이하 (768px) */
@media (max-width: 768px) {
  .hero__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .hero__title { font-size: 1.4rem; }

  .hero__actions {
    width: 100%;
  }

  .btn { flex: 1; justify-content: center; }

  .kpi-grid { grid-template-columns: 1fr; }

  .rules-grid { grid-template-columns: 1fr; }

  .section-header { flex-direction: column; gap: 4px; }

  .br-desktop { display: none !important; }
}

/* 데스크톱 (769px 이상) */
@media (min-width: 769px) {
  .br-desktop { display: inline; }

  .kpi-grid { grid-template-columns: repeat(3, 1fr); }

  .rules-grid { grid-template-columns: repeat(3, 1fr); }
}