/* 수면 시간 계산기 전용 스타일 */

nav { max-width: 820px; }
main { max-width: 820px; }

.subtitle {
  color: var(--text-sub);
  margin-bottom: 1.25rem;
}

/* 모드 탭 */
.mode-tabs {
  display: flex;
  gap: 0.4rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.mode-tab {
  flex: 1;
  min-width: 200px;
  padding: 0.65rem 1rem;
  font-size: 0.88rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text-sub);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
}

.mode-tab:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mode-tab.active {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

/* 시간 입력 */
.time-input {
  margin-bottom: 1.25rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.85rem 1rem;
}

.time-input label {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-sub);
  margin-bottom: 0.45rem;
}

.time-row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
}

#time-ref {
  flex: 1;
  padding: 0.65rem 0.8rem;
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.4rem;
  font-weight: 700;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  outline: none;
  text-align: center;
  min-width: 0;
}

#time-ref:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.12);
}

.now-btn {
  padding: 0.7rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}

.now-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* 결과 카드 그리드 */
.results {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.7rem;
  margin-bottom: 1.25rem;
}

.result-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem 0.85rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  text-align: center;
  position: relative;
  transition: transform 0.15s, box-shadow 0.15s;
}

.result-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.rc-time {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.1;
}

.rc-meta {
  display: flex;
  gap: 0.3rem;
  font-size: 0.78rem;
  color: var(--text-sub);
}

.rc-dot {
  opacity: 0.4;
}

.rc-tag {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.18rem 0.55rem;
  border-radius: 999px;
  margin-top: 0.15rem;
}

/* 추천 카드 (5~6 주기) */
.cat-recommended {
  background: linear-gradient(135deg, rgba(34, 197, 94, 0.08), rgba(34, 197, 94, 0.04));
  border-color: #22c55e;
}

.cat-recommended .rc-time {
  color: #16a34a;
}

.cat-recommended-tag {
  background: #22c55e;
  color: #fff;
}

@media (prefers-color-scheme: dark) {
  .cat-recommended .rc-time {
    color: #4ade80;
  }
}

/* 짧음 (3~4 주기) */
.cat-short-tag {
  background: var(--surface);
  color: var(--warning, #d97706);
  border: 1px solid var(--warning, #d97706);
}

/* 긴 휴식 (7~8 주기) */
.cat-long-tag {
  background: var(--surface);
  color: var(--text-sub);
  border: 1px solid var(--border);
}

/* 안내 박스 */
.info-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--primary);
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-sub);
  margin-bottom: 1.5rem;
}

.info-box strong {
  color: var(--text);
}

.info-box em {
  font-style: normal;
  font-weight: 600;
  color: var(--text);
}

@media (max-width: 600px) {
  .results {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }
  .result-card { padding: 0.85rem 0.5rem; }
  .rc-time { font-size: 1.25rem; }
  .rc-meta { font-size: 0.72rem; }
  #time-ref { font-size: 1.2rem; }
  .mode-tab { min-width: 0; padding: 0.55rem 0.6rem; font-size: 0.8rem; }
}