/* 골프 게임 도감 전체 스타일 — Flip 카드 + 반응형 레이아웃 */

/* ── 변수 ── */
:root {
  --color-primary: #1a5c2a;
  --color-bg: #f0f4f1;
  --color-card-front: #ffffff;
  --color-text: #1a1a1a;
  --color-text-muted: #777;
  --color-text-on-dark: #ffffff;
  --color-accent: #f5a623;
  --color-star-filled: #f5a623;
  --color-star-empty: #ddd;
  --radius-card: 18px;
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.10);
  --shadow-card-hover: 0 8px 28px rgba(0, 0, 0, 0.18);
  --transition-flip: 0.6s ease;
  --card-min-height: 380px;
  --card-color: #1a5c2a;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Noto Sans KR", "Apple SD Gothic Neo", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

/* ── 헤더 ── */
.site-header {
  background: var(--color-primary);
  color: var(--color-text-on-dark);
  padding: 16px 20px;
}

.header-inner {
  max-width: 1000px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-icon {
  font-size: 2.2rem;
  line-height: 1;
  flex-shrink: 0;
}

.header-text {
  display: flex;
  flex-direction: column;
}

.site-title {
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.site-subtitle {
  margin-top: 3px;
  font-size: clamp(0.78rem, 2vw, 0.875rem);
  opacity: 0.8;
}

.terms-link {
  margin-left: auto;
  flex-shrink: 0;
  padding: 7px 14px;
  background: rgba(255,255,255,0.15);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.35);
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.2s;
}

.terms-link:hover {
  background: rgba(255,255,255,0.28);
}

/* ── 컨트롤 바 ── */
.controls {
  max-width: 1000px;
  margin: 28px auto 0;
  padding: 0 20px;
  display: flex;
  flex-wrap: nowrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.filter-group {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  flex: 1;
  min-width: 0;
}

.filter-group::-webkit-scrollbar {
  display: none;
}

.filter-btn {
  padding: 8px 18px;
  flex-shrink: 0;
  border: 2px solid var(--filter-color, var(--color-primary));
  border-radius: 999px;
  background: transparent;
  color: var(--filter-color, var(--color-primary));
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--filter-color, var(--color-primary));
  color: #fff;
}

.filter-btn[data-filter="전체"]     { --filter-color: #555555; }
.filter-btn[data-filter="초보추천"] { --filter-color: #2980b9; }
.filter-btn[data-filter="중수추천"] { --filter-color: #e67e22; }
.filter-btn[data-filter="고수용"]   { --filter-color: #c0392b; }

.sort-group select {
  padding: 8px 14px;
  border: 2px solid var(--color-primary);
  border-radius: 8px;
  background: #fff;
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  outline: none;
}

.sort-group select:focus {
  box-shadow: 0 0 0 3px rgba(26, 92, 42, 0.2);
}

/* ── 카드 그리드 ── */
.card-grid {
  max-width: 1000px;
  margin: 28px auto 48px;
  padding: 0 20px;
  display: grid;
  grid-template-columns: 1fr;
  column-gap: 28px;
  row-gap: 40px;
}

@media (min-width: 481px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
    column-gap: 24px;
    row-gap: 36px;
  }
}

@media (min-width: 769px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
    column-gap: 28px;
    row-gap: 40px;
  }
}

@media (min-width: 1201px) {
  .card-grid {
    max-width: 1320px;
    grid-template-columns: repeat(4, 1fr);
    column-gap: 28px;
    row-gap: 40px;
  }
}

/* ── Flip 카드 ── */
.card-container {
  perspective: 1000px;
  cursor: pointer;
}

.card-container:focus {
  outline: 3px solid var(--card-color);
  outline-offset: 4px;
  border-radius: var(--radius-card);
}

.card-inner {
  display: grid;
  grid-template-areas: "card";
  transition: transform var(--transition-flip);
  transform-style: preserve-3d;
}

.card-container.is-flipped .card-inner {
  transform: rotateY(180deg);
}

/* 플립 시 앞면을 흐름에서 제거 → 뒷면 콘텐츠 높이로 카드 크기 결정 */
.card-container.is-flipped .card-front {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
}

.card-front,
.card-back {
  grid-area: card;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  width: 100%;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.card-container:hover .card-front,
.card-container:hover .card-back {
  box-shadow: var(--shadow-card-hover);
}

/* ── 카드 앞면 ── */
.card-front {
  background: var(--color-card-front);
}

/* 컬러 헤더 밴드 */
.card-header {
  background: var(--card-color);
  padding: 14px 16px;
  color: #fff;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: var(--radius-card) var(--radius-card) 0 0;
}

.card-front-emoji {
  font-size: 1.8rem;
  line-height: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 1px 2px rgba(0,0,0,0.2));
}

.card-header-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.card-front-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.card-front-name-en {
  font-size: 0.75rem;
  opacity: 0.8;
  margin-top: 2px;
}

/* 카드 본문 */
.card-body {
  padding: 16px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card-divider {
  border: none;
  border-top: 1px solid #efefef;
  margin: 10px 0;
}

.card-stars-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.stars {
  letter-spacing: 1px;
  font-size: 0.82rem;
  color: var(--color-star-filled);
}

.stars .empty {
  color: var(--color-star-empty);
}

.card-summary {
  font-size: 0.875rem;
  color: var(--color-text);
  margin: 10px 0 8px;
  flex: 1;
  line-height: 1.55;
}

.card-target {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.card-target strong {
  color: var(--card-color);
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 14px;
}

.tag {
  font-size: 0.72rem;
  padding: 3px 10px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--card-color) 12%, white);
  color: var(--card-color);
  font-weight: 600;
}

.card-flip-btn {
  margin-top: auto;
  padding: 10px 0;
  background: var(--card-color);
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  pointer-events: none;
  transition: opacity 0.2s;
  text-align: center;
}

.card-container:hover .card-flip-btn {
  opacity: 0.88;
}

/* ── 카드 뒷면 ── */
.card-back {
  background: var(--card-color);
  color: var(--color-text-on-dark);
  transform: rotateY(180deg);
  padding: 22px 20px 20px;
}

.card-back-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 14px;
  opacity: 0.95;
}

.card-rules {
  list-style: none;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin-bottom: 14px;
  counter-reset: rule-counter;
}

.card-rules li {
  font-size: 0.825rem;
  line-height: 1.55;
  padding-left: 22px;
  position: relative;
  opacity: 0.9;
}

.card-rules li::before {
  content: counter(rule-counter) ".";
  counter-increment: rule-counter;
  position: absolute;
  left: 0;
  font-weight: 700;
  color: var(--color-accent);
}

.card-tip {
  font-size: 0.8rem;
  background: rgba(255, 255, 255, 0.14);
  border-left: 3px solid var(--color-accent);
  padding: 8px 10px;
  border-radius: 0 8px 8px 0;
  margin-bottom: 14px;
  line-height: 1.5;
}

.card-tip-label {
  font-weight: 700;
  color: var(--color-accent);
  font-size: 0.75rem;
  display: block;
  margin-bottom: 3px;
}

.card-back-btn {
  margin-top: auto;
  padding: 10px 0;
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  pointer-events: none;
  transition: background 0.2s;
  text-align: center;
}

.card-container:hover .card-back-btn {
  background: rgba(255, 255, 255, 0.28);
}

/* ── 빈 상태 ── */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

/* ── 푸터 ── */
.site-footer {
  margin-top: auto;
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.75);
  text-align: center;
  padding: 22px 16px;
  font-size: 0.825rem;
  line-height: 2;
}