/* ==========================================
   CSS 변수 정의 - Minimal Black and White UI
   ========================================== */
:root {
  /* 컬러 팔레트 - Black & White */
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-100: #f5f5f5;
  --color-gray-200: #e5e5e5;
  --color-gray-300: #d4d4d4;
  --color-gray-400: #a3a3a3;
  --color-gray-500: #737373;
  --color-gray-600: #525252;
  --color-gray-700: #404040;
  --color-gray-800: #262626;
  --color-gray-900: #171717;

  /* Primary colors */
  --primary-color: var(--color-black);
  --text-primary: var(--color-black);
  --text-secondary: var(--color-gray-600);
  --bg-primary: var(--color-white);
  --bg-secondary: var(--color-gray-100);
  --bg-muted: var(--color-gray-100);
  --border-color: var(--color-black);

  /* 간격 */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* 그림자 */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-lg: 0 4px 8px rgba(0,0,0,0.15);

  /* 터치 타겟 */
  --touch-target: 44px;

  /* 헤더 높이 */
  --header-height: 60px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Border width */
  --border-thin: 1px;
  --border-thick: 2px;

  /* Typography */
  --font-size-base: 16px;
  --letter-spacing-tight: -0.5px;
  --letter-spacing-normal: 0px;
  --letter-spacing-wide: 0.3px;
  --letter-spacing-wider: 0.5px;

  /* Line heights */
  --line-height-tight: 1.3;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.6;
}

/* ==========================================
   Reset & Base
   ========================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
  letter-spacing: var(--letter-spacing-normal);
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding-bottom: 80px;
}

/* ==========================================
   헤더
   ========================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--bg-primary);
  border-bottom: var(--border-thick) solid var(--border-color);
  z-index: 100;
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  padding: 0 var(--spacing-lg);
  max-width: 600px;
  margin: 0 auto;
}

.app-title {
  font-size: clamp(20px, 5vw, 24px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.points-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--bg-primary);
  padding: var(--spacing-sm) var(--spacing-md);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-full);
}

.profile-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  background: var(--color-black);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 20px;
  text-decoration: none;
  transition: background 0.2s ease;
}

.profile-btn:active {
  background: var(--color-gray-800);
}

.back-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  color: var(--text-primary);
  font-size: 28px;
  text-decoration: none;
  transition: opacity 0.2s ease;
}

.back-btn:active {
  opacity: 0.7;
}

.points-label {
  font-size: clamp(12px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-wide);
}

.points-value {
  font-size: clamp(14px, 3.5vw, 16px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.streak-text {
  font-size: clamp(11px, 2.5vw, 12px);
  color: var(--text-secondary);
  margin-top: 2px;
  letter-spacing: var(--letter-spacing-wide);
  line-height: var(--line-height-normal);
}

/* ==========================================
   탭 네비게이션
   ========================================== */
.tabs {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--bg-primary);
  border-top: var(--border-thick) solid var(--border-color);
  z-index: 90;
  display: flex;
}

.tab {
  flex: 1;
  padding: var(--spacing-md) 0;
  background: var(--bg-primary);
  border: none;
  border-right: var(--border-thin) solid var(--border-color);
  color: var(--text-primary);
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  cursor: pointer;
  transition: all 0.2s ease;
}

.tab:last-child {
  border-right: none;
}

.tab.active {
  background: var(--color-black);
  color: var(--color-white);
  font-weight: 600;
}

.tab:hover:not(.active) {
  background: var(--color-gray-100);
}

/* ==========================================
   메인 컨텐츠
   ========================================== */
.content-wrapper {
  max-width: 600px;
  margin: 0 auto;
  padding: calc(var(--header-height) + var(--spacing-lg)) 0 calc(50px + var(--spacing-lg));
}

.content {
  display: none;
  padding: 0 var(--spacing-md);
}

.content.active {
  display: block;
}

/* 홈 탭 */
.today-header {
  margin-bottom: var(--spacing-lg);
}

.content-title {
  font-size: clamp(18px, 4.5vw, 20px);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.progress-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.progress-bar {
  flex: 1;
  height: 12px;
  background: var(--bg-secondary);
  border: var(--border-thin) solid var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-black);
  transition: width 0.3s ease;
  width: 0%;
}

.progress-text {
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-primary);
  min-width: 45px;
  text-align: right;
  letter-spacing: var(--letter-spacing-normal);
}

.empty-state-sub {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-wide);
}

/* ==========================================
   퀘스트 리스트
   ========================================== */
.quest-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.empty-state {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--text-secondary);
}

.hidden {
  display: none !important;
}

.empty-state-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
}

.empty-state-text {
  font-size: clamp(15px, 3.5vw, 16px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
}

/* ==========================================
   퀘스트 카드
   ========================================== */
.quest-card {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  transition: all 0.2s ease;
}

.quest-card.completed {
  background: var(--bg-muted);
}

.quest-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.quest-card-left {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  flex: 1;
}

.quest-checkbox {
  width: 24px;
  height: 24px;
  border: var(--border-thick) solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 2px;
  position: relative;
  transition: all 0.2s ease;
}

.quest-checkbox.checked {
  background: var(--color-black);
  border-color: var(--color-black);
}

.quest-checkbox.checked::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
}

.quest-info {
  flex: 1;
}

.quest-title {
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
}

.quest-title.completed {
  text-decoration: line-through;
  color: var(--text-secondary);
}

.quest-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
}

.quest-points {
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.quest-time {
  font-size: clamp(11px, 2.5vw, 12px);
  letter-spacing: var(--letter-spacing-wide);
}

.quest-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-complete {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-complete:hover {
  background: var(--color-gray-800);
}

.btn-complete:active {
  transform: scale(0.95);
}

.badge-verified {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: clamp(11px, 2.5vw, 12px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wider);
}

/* ==========================================
   날짜 피커
   ========================================== */
.date-picker-container {
  margin-bottom: var(--spacing-lg);
  padding: 0 var(--spacing-md);
}

.date-picker {
  display: flex;
  gap: var(--spacing-sm);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  padding-bottom: var(--spacing-sm);
}

.date-picker::-webkit-scrollbar {
  display: none;
}

.date-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  min-width: 80px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.date-btn.active {
  background: var(--color-black);
  color: var(--color-white);
}

.date-btn:hover:not(.active) {
  background: var(--color-gray-100);
}

.date-btn-day {
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-normal);
}

.date-btn-weekday {
  font-size: clamp(11px, 2.5vw, 12px);
  opacity: 0.7;
  letter-spacing: var(--letter-spacing-wide);
}

.date-btn-count {
  font-size: clamp(11px, 2.5vw, 12px);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
}

/* ==========================================
   갤러리 뷰
   ========================================== */
.quest-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: var(--spacing-md);
  padding: 0 var(--spacing-md);
}

.gallery-item {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
}

.gallery-item:active {
  transform: scale(0.98);
}

.gallery-image {
  aspect-ratio: 1;
  background: var(--bg-secondary);
  overflow: hidden;
}

.gallery-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery-info {
  padding: var(--spacing-sm);
  border-top: var(--border-thin) solid var(--border-color);
}

.gallery-title {
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
}

.gallery-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: clamp(11px, 2.5vw, 12px);
  letter-spacing: var(--letter-spacing-wide);
}

.gallery-time {
  color: var(--text-secondary);
}

.gallery-points {
  color: var(--text-primary);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-normal);
}

.gallery-empty {
  text-align: center;
  padding: var(--spacing-xl);
  color: var(--text-secondary);
  font-size: clamp(13px, 3vw, 14px);
  letter-spacing: var(--letter-spacing-wide);
  grid-column: 1 / -1;
}

/* ==========================================
   인스타그램 피드 형식 (프로필 페이지)
   ========================================== */
.profile-feed {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  margin: var(--spacing-md) calc(-1 * var(--spacing-lg)) 0;
}

.feed-item {
  background: var(--bg-primary);
  overflow: hidden;
  cursor: pointer;
  transition: opacity 0.2s ease;
  position: relative;
  width: 100%;
  padding-bottom: 100%; /* 1:1 비율 유지 (구형 브라우저 호환) */
  height: 0;
}

.feed-item:active {
  opacity: 0.7;
}

.feed-photo {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-secondary);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feed-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.feed-photo.no-photo {
  background: var(--bg-secondary);
}

.feed-photo.no-photo .no-photo-icon {
  font-size: 32px;
  opacity: 0.3;
}

/* ==========================================
   캘린더 뷰
   ========================================== */
.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.calendar-title {
  font-size: clamp(18px, 4.5vw, 20px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.calendar-nav {
  display: flex;
  gap: var(--spacing-sm);
}

.calendar-nav-btn {
  width: 40px;
  height: 40px;
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 20px;
  font-weight: 700;
  transition: all 0.2s ease;
}

.calendar-nav-btn:hover {
  background: var(--color-gray-100);
}

.calendar-nav-btn:active {
  transform: scale(0.95);
}

.calendar-container {
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.calendar-weekdays {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--color-black);
  color: var(--color-white);
}

.calendar-weekday {
  text-align: center;
  padding: var(--spacing-md) var(--spacing-xs);
  font-size: clamp(12px, 3vw, 14px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--bg-primary);
}

.calendar-day {
  aspect-ratio: 2/3;
  border-right: var(--border-thin) solid var(--border-color);
  border-bottom: var(--border-thin) solid var(--border-color);
  overflow: hidden;
  cursor: pointer;
  transition: opacity 0.2s ease;
  position: relative;
}

.calendar-day:nth-child(7n) {
  border-right: none;
}

.calendar-day.empty {
  background: var(--bg-secondary);
  cursor: default;
}

.calendar-day:not(.empty):hover {
  opacity: 0.8;
}

.calendar-day.today {
  background: var(--color-gray-100);
}

.calendar-day.today .day-number {
  font-weight: 700;
}

/* 사진이 있는 날 */
.calendar-day.has-photo {
  padding: 0;
}

.calendar-day.has-photo .day-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.calendar-day.has-photo .day-number {
  display: none;
}

.calendar-day.has-photo .day-count {
  position: absolute;
  bottom: var(--spacing-xs);
  right: var(--spacing-xs);
  background: rgba(255, 255, 255, 0.95);
  border: var(--border-thin) solid var(--border-color);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: clamp(10px, 2vw, 11px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-normal);
}

/* 사진이 없는 날 */
.calendar-day:not(.has-photo) {
  padding: var(--spacing-sm);
  display: flex;
  flex-direction: column;
}

.day-number {
  font-size: clamp(12px, 3vw, 14px);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-normal);
}

.day-quest-indicator {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.day-circle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(11px, 2.5vw, 12px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-normal);
}

.day-circle.all-completed {
  background: var(--color-black);
  color: var(--color-white);
}

.day-circle.partial {
  border: var(--border-thick) solid var(--border-color);
  background: var(--bg-primary);
  color: var(--text-primary);
}

.day-total {
  font-size: clamp(10px, 2vw, 11px);
  color: var(--text-secondary);
  margin-top: 2px;
  letter-spacing: var(--letter-spacing-wide);
}

.calendar-legend {
  display: flex;
  gap: var(--spacing-lg);
  font-size: clamp(13px, 3vw, 14px);
  letter-spacing: var(--letter-spacing-wide);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.legend-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
}

.legend-completed {
  background: var(--color-black);
}

.legend-partial {
  border: var(--border-thick) solid var(--border-color);
  background: var(--bg-primary);
}

/* ==========================================
   날짜별 상세 모달
   ========================================== */
.day-detail-summary {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-wide);
}

.day-detail-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.day-detail-item {
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.day-detail-item.incomplete {
  opacity: 0.6;
  border-color: var(--color-gray-400);
}

.day-detail-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: var(--bg-secondary);
}

.day-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.day-detail-info {
  padding: var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.day-detail-quest-title {
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
}

.day-detail-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--color-black);
  color: var(--color-white);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: clamp(11px, 2.5vw, 12px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wider);
}

.day-detail-badge.incomplete-badge {
  background: var(--color-gray-400);
  color: var(--color-white);
}

.day-detail-points {
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-normal);
  white-space: nowrap;
}

.day-detail-points.incomplete-points {
  background: var(--color-gray-400);
  color: var(--color-white);
}

/* 완료 모달 추가 스타일 */
.complete-quest-name {
  font-size: clamp(17px, 4vw, 18px);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-normal);
}

.complete-quest-points {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  letter-spacing: var(--letter-spacing-wide);
}

/* ==========================================
   FAB (Floating Action Button)
   ========================================== */
.fab {
  position: fixed;
  bottom: 80px;
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  background: var(--color-black);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-lg);
  transition: all 0.2s ease;
  z-index: 1000;
}

.fab:hover {
  background: var(--color-gray-800);
  transform: scale(1.05);
}

.fab:active {
  transform: scale(0.95);
}

/* ==========================================
   모달
   ========================================== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg);
}

.modal.active {
  display: flex;
}

.modal-content {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  width: 100%;
  max-width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  overflow-x: hidden;
  box-sizing: border-box;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.modal-title {
  font-size: clamp(18px, 4.5vw, 20px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

.modal-close {
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.modal-close:hover {
  background: var(--color-gray-100);
  border-radius: 50%;
}

.modal-body {
  margin-bottom: var(--spacing-lg);
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}

.modal-footer {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* ==========================================
   퀘스트 상세 모달 (프로필 페이지)
   ========================================== */
.quest-detail-image {
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: var(--spacing-lg);
}

.quest-detail-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.quest-detail-no-photo {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
}

.quest-detail-no-photo .no-photo-icon {
  font-size: 64px;
  opacity: 0.3;
}

.quest-detail-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.quest-detail-title {
  font-size: clamp(18px, 4.5vw, 20px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-normal);
  margin: 0;
}

.quest-detail-meta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.quest-detail-date {
  font-size: clamp(14px, 3.5vw, 15px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-normal);
}

.quest-detail-points-value {
  font-size: clamp(16px, 4vw, 18px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.quest-detail-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: var(--border-thin) solid var(--border-color);
}

.quest-action-btn {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: var(--touch-target);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: clamp(14px, 3.5vw, 15px);
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: var(--letter-spacing-normal);
  flex: 1;
  justify-content: center;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
  touch-action: manipulation;
}

.quest-action-btn:active {
  transform: scale(0.95);
  opacity: 0.8;
}

.quest-action-btn .action-icon {
  font-size: clamp(18px, 4.5vw, 20px);
  line-height: 1;
}

.quest-action-btn .action-count {
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-normal);
}

.quest-like-btn:hover {
  background: var(--color-gray-100);
}

.quest-dislike-btn:hover {
  background: var(--color-gray-100);
}

/* 활성화 상태 (나중에 기능 추가 시 사용) */
.quest-action-btn.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.quest-like-btn.active {
  background: var(--color-black);
  color: var(--color-white);
}

.quest-dislike-btn.active {
  background: var(--color-black);
  color: var(--color-white);
}

/* ==========================================
   폼 요소
   ========================================== */
.form-group {
  margin-bottom: var(--spacing-md);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.form-label {
  display: block;
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: var(--letter-spacing-wide);
}

.form-input,
.form-select {
  width: 100%;
  max-width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: clamp(15px, 3.5vw, 16px);
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
  transition: all 0.2s ease;
  box-sizing: border-box;
}

.form-input:focus,
.form-select:focus {
  outline: none;
  border-color: var(--text-primary);
}

.form-input::placeholder {
  color: var(--text-secondary);
}

/* 날짜 입력 필드 특별 처리 */
input[type="date"].form-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  position: relative;
  padding-right: var(--spacing-md);
}

input[type="date"].form-input::-webkit-calendar-picker-indicator {
  position: absolute;
  right: var(--spacing-md);
  cursor: pointer;
}

input[type="date"].form-input::-webkit-inner-spin-button,
input[type="date"].form-input::-webkit-clear-button {
  display: none;
}

/* 이미지 업로드 */
.image-upload-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  border: var(--border-thick) dashed var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 200px;
}

.image-upload-area:hover {
  background: var(--color-gray-200);
  border-color: var(--text-primary);
}

.image-upload-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
  color: var(--text-secondary);
}

.image-upload-text {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  text-align: center;
  letter-spacing: var(--letter-spacing-wide);
  line-height: var(--line-height-normal);
}

.image-preview {
  display: none;
  width: 100%;
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: var(--spacing-md);
}

.image-preview.active {
  display: block;
}

.image-preview img {
  width: 100%;
  height: auto;
  display: block;
}

/* ==========================================
   버튼
   ========================================== */
.btn {
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--radius-sm);
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-wide);
  cursor: pointer;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.btn-primary {
  background: var(--color-black);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-gray-800);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: var(--border-thick) solid var(--border-color);
}

.btn-secondary:hover {
  background: var(--color-gray-100);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.btn-danger {
  background: var(--color-black);
  color: var(--color-white);
}

.btn-danger:hover {
  background: var(--color-gray-900);
}

.btn-full {
  width: 100%;
}

/* ==========================================
   관리자 페이지
   ========================================== */
.admin-container {
  max-width: 600px;
  margin: 0 auto;
  padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-md) var(--spacing-lg);
}

.admin-section {
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.section-title {
  font-size: clamp(17px, 4vw, 18px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-tight);
}

/* 스토리지 정보 */
.storage-info {
  margin-top: var(--spacing-md);
}

.storage-bar-container {
  width: 100%;
  height: 24px;
  background: var(--bg-secondary);
  border: var(--border-thin) solid var(--border-color);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--spacing-sm);
}

.storage-bar {
  height: 100%;
  background: var(--color-black);
  transition: width 0.3s ease;
  border-radius: var(--radius-full);
}

.storage-text {
  text-align: center;
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  letter-spacing: var(--letter-spacing-wide);
}

.storage-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.storage-details p {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
}

.storage-details strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* 폼 요소 */
.input-with-suffix {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.input-with-suffix input {
  flex: 1;
}

.suffix {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: var(--letter-spacing-wide);
}

.help-text {
  font-size: clamp(11px, 2.5vw, 12px);
  color: var(--text-secondary);
  margin-top: var(--spacing-xs);
  line-height: var(--line-height-normal);
  letter-spacing: var(--letter-spacing-wide);
}

/* 관리자 액션 버튼 */
.admin-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* 앱 정보 */
.app-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.app-info p {
  font-size: clamp(13px, 3vw, 14px);
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  letter-spacing: var(--letter-spacing-wide);
}

.app-info strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ==========================================
   토스트 알림
   ========================================== */
.toast {
  position: fixed;
  bottom: 100px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-black);
  color: var(--color-white);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-size: clamp(13px, 3vw, 14px);
  letter-spacing: var(--letter-spacing-wide);
  line-height: var(--line-height-normal);
  z-index: 10000;
  opacity: 0;
  transition: all 0.3s ease;
  pointer-events: none;
  max-width: 90%;
  text-align: center;
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ==========================================
   프로필 페이지
   ========================================== */
.profile-stats {
  text-align: center;
}

.profile-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.profile-avatar {
  width: 80px;
  height: 80px;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  margin-bottom: var(--spacing-md);
}

.profile-name {
  font-size: clamp(18px, 4.5vw, 20px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.stat-card {
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg) var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.stat-value {
  font-size: clamp(20px, 5vw, 24px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-tight);
}

.stat-label {
  font-size: clamp(11px, 2.5vw, 12px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
}

/* 주간 히트맵 */
.weekly-heatmap {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: var(--spacing-sm);
}

.heatmap-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm);
}

.heatmap-day {
  font-size: 11px;
  color: var(--text-secondary);
  font-weight: 500;
}

.heatmap-dot {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid var(--color-gray-300);
  background: transparent;
  transition: all 0.2s ease;
}

.heatmap-cell.level-1 .heatmap-dot {
  background: var(--color-gray-300);
  border-color: var(--color-gray-300);
}

.heatmap-cell.level-2 .heatmap-dot {
  background: var(--color-gray-500);
  border-color: var(--color-gray-500);
}

.heatmap-cell.level-3 .heatmap-dot {
  background: var(--color-black);
  border-color: var(--color-black);
}

/* 성취 배지 */
.badges-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.badge-item.earned {
  border-color: var(--color-black);
}

.badge-item.locked {
  opacity: 0.4;
}

.badge-item.locked .badge-icon {
  filter: grayscale(100%);
}

.badge-icon {
  font-size: 24px;
  line-height: 1;
}

.badge-name {
  font-size: 11px;
  color: var(--text-secondary);
  text-align: center;
  font-weight: 500;
}

.badge-item.earned .badge-name {
  color: var(--text-primary);
}

.no-photo {
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.no-photo-icon {
  font-size: 32px;
  opacity: 0.5;
}

/* ==========================================
   반응형 (태블릿 이상)
   ========================================== */
@media (min-width: 768px) {
  .quest-gallery {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }

  .modal-content {
    max-width: 500px;
  }

  /* 큰 화면에서 hover 효과 */
  .tab:hover {
    background: var(--color-gray-100);
  }

  .tab.active:hover {
    background: var(--color-black);
  }

  .quest-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
  }

  .calendar-day:not(.empty):hover {
    transform: scale(1.02);
  }

  /* 더 큰 터치 타겟은 필요 없으므로 버튼 패딩 조정 가능 */
  .btn-complete {
    padding: var(--spacing-xs) var(--spacing-md);
  }
}

/* 데스크톱 화면 */
@media (min-width: 1024px) {
  .header-content,
  .content-wrapper {
    max-width: 800px;
  }

  .modal-content {
    max-width: 600px;
  }

  /* 캘린더 그리드 간격 조정 */
  .calendar-grid {
    gap: 1px;
  }
}

/* ==========================================
   모바일 최적화
   ========================================== */
@media (max-width: 768px) {
  /* 터치 최적화 */
  button,
  .btn,
  .tab,
  .fab {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
  }

  /* 모바일에서 버튼 클릭 지연 방지 */
  #add-submit-btn {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  /* 프로필 피드 모바일 최적화 */
  .profile-feed {
    margin: var(--spacing-md) calc(-1 * var(--spacing-md)) 0;
  }

  .feed-item {
    /* iOS Safari 호환성을 위한 추가 설정 */
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
  }

  .feed-photo img {
    /* 이미지 렌더링 최적화 (하드웨어 가속) */
    -webkit-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
  }

  /* 입력 필드 줌 방지 - 최소 16px */
  input[type="text"],
  input[type="number"],
  input[type="date"],
  .form-input,
  .form-select {
    font-size: 16px;
  }

  .modal-content {
    width: 95%;
    max-width: calc(100vw - var(--spacing-lg) * 2);
    max-height: 90vh;
    padding: var(--spacing-md);
  }

  /* 모달 내부 폼 요소들이 잘 맞도록 */
  .modal-body {
    padding: 0;
  }

  .form-group {
    margin-bottom: var(--spacing-md);
  }

  .form-input,
  .form-select {
    width: 100%;
    max-width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
  }

  /* 날짜 입력 필드가 튀어나오지 않도록 */
  input[type="date"].form-input {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
  }

  /* 모바일에서 더 나은 가독성을 위한 조정 */
  body {
    font-size: 16px;
  }

  .header-content {
    padding: 0 var(--spacing-md);
  }

  .content-wrapper {
    padding-left: 0;
    padding-right: 0;
  }
}

/* 작은 모바일 화면 */
@media (max-width: 375px) {
  .app-title {
    font-size: 20px;
  }

  .points-display {
    padding: 6px var(--spacing-sm);
  }

  .points-label,
  .points-value {
    font-size: 12px;
  }

  .streak-text {
    font-size: 10px;
  }

  .calendar-day.has-photo .day-count {
    font-size: 10px;
    padding: 1px 6px;
  }

  /* 작은 화면에서 모달 최적화 */
  .modal-content {
    width: 90%;
    max-width: calc(100vw - var(--spacing-md) * 2);
    padding: var(--spacing-md) var(--spacing-sm);
  }

  .modal-header {
    margin-bottom: var(--spacing-md);
  }

  .modal-title {
    font-size: 17px;
  }

  .form-input,
  .form-select {
    padding: var(--spacing-sm);
    font-size: 15px;
  }

  .btn {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 14px;
  }
}

/* ==========================================
   반복 퀘스트 관련 스타일
   ========================================== */

/* 퀘스트 타입 탭 */
.quest-type-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.quest-type-tab {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: var(--letter-spacing-wide);
}

.quest-type-tab.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

/* 요일 선택 */
.weekday-selector {
  display: flex;
  gap: var(--spacing-xs);
  flex-wrap: wrap;
}

.weekday-chip {
  display: flex;
  align-items: center;
  justify-content: center;
}

.weekday-chip input {
  display: none;
}

.weekday-chip span {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: 50%;
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.weekday-chip input:checked + span {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

/* 반복 요일 배지 */
.repeat-badge {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  background: var(--bg-secondary);
  border: var(--border-thin) solid var(--border-color);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-full);
  font-size: clamp(10px, 2.5vw, 11px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
  margin-left: var(--spacing-xs);
}

.repeat-badge-days {
  font-weight: 600;
  color: var(--text-primary);
}

/* 서브 탭 */
.sub-tabs {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding: 0 var(--spacing-md);
}

.sub-tab {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-sm);
  font-size: clamp(13px, 3vw, 14px);
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
  letter-spacing: var(--letter-spacing-wide);
}

.sub-tab.active {
  background: var(--color-black);
  color: var(--color-white);
  border-color: var(--color-black);
}

.sub-content {
  display: none;
}

.sub-content.active {
  display: block;
}

/* 퀘스트 관리 섹션 */
.manage-section {
  margin-bottom: var(--spacing-xl);
  padding: 0 var(--spacing-md);
}

.manage-section-title {
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: var(--border-thin) solid var(--border-color);
  letter-spacing: var(--letter-spacing-tight);
}

.manage-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.manage-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
}

.manage-item-info {
  flex: 1;
}

.manage-item-title {
  font-size: clamp(14px, 3.5vw, 15px);
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  letter-spacing: var(--letter-spacing-normal);
}

.manage-item-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: clamp(11px, 2.5vw, 12px);
  color: var(--text-secondary);
}

.manage-item-days {
  font-weight: 600;
}

.manage-item-points {
  background: var(--bg-secondary);
  padding: 2px var(--spacing-sm);
  border-radius: var(--radius-full);
}

.manage-item-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.manage-item-btn {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
  border: var(--border-thin) solid var(--border-color);
  border-radius: 50%;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.manage-item-btn:hover {
  background: var(--color-black);
  color: var(--color-white);
}

.manage-item-btn.delete:hover {
  background: #dc2626;
  border-color: #dc2626;
}

/* ==========================================
   리더보드
   ========================================== */
.auth-container {
  padding: var(--spacing-lg) 0;
}

.google-login-btn {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md) var(--spacing-xl);
}

.leaderboard-container {
  padding: 0;
}

.my-rank-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.my-rank-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.my-rank-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--color-white);
  object-fit: cover;
}

.my-rank-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.my-rank-name {
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 600;
  letter-spacing: var(--letter-spacing-normal);
}

.my-rank-points {
  font-size: clamp(13px, 3vw, 14px);
  opacity: 0.8;
  letter-spacing: var(--letter-spacing-wide);
}

.my-rank-number {
  text-align: right;
}

.rank-label {
  display: block;
  font-size: clamp(11px, 2.5vw, 12px);
  opacity: 0.7;
  margin-bottom: 2px;
  letter-spacing: var(--letter-spacing-wide);
}

.rank-value {
  font-size: clamp(24px, 6vw, 28px);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-tight);
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.leaderboard-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-primary);
  border: var(--border-thick) solid var(--border-color);
  border-radius: var(--radius-md);
  transition: all 0.2s ease;
}

.leaderboard-item.top-3 {
  border-width: 3px;
}

.leaderboard-item.rank-1 {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  border-color: #f59e0b;
}

.leaderboard-item.rank-2 {
  background: linear-gradient(135deg, #f3f4f6 0%, #e5e7eb 100%);
  border-color: #9ca3af;
}

.leaderboard-item.rank-3 {
  background: linear-gradient(135deg, #fed7aa 0%, #fdba74 100%);
  border-color: #f97316;
}

.leaderboard-rank {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: clamp(14px, 3.5vw, 16px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.leaderboard-item.rank-1 .leaderboard-rank,
.leaderboard-item.rank-2 .leaderboard-rank,
.leaderboard-item.rank-3 .leaderboard-rank {
  font-size: 20px;
}

.leaderboard-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: var(--border-thick) solid var(--border-color);
  object-fit: cover;
}

.leaderboard-info {
  flex: 1;
}

.leaderboard-name {
  font-size: clamp(14px, 3.5vw, 15px);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
  line-height: var(--line-height-normal);
}

.leaderboard-streak {
  font-size: clamp(11px, 2.5vw, 12px);
  color: var(--text-secondary);
  letter-spacing: var(--letter-spacing-wide);
}

.leaderboard-points {
  font-size: clamp(15px, 3.5vw, 16px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: var(--letter-spacing-normal);
}

.logout-btn {
  width: 100%;
}

/* ==========================================
   친구 관리 섹션
   ========================================== */

.friend-section {
  margin-top: var(--spacing-md);
}

/* 내 친구 코드 박스 */
.friend-code-box {
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.friend-code-label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: var(--letter-spacing-wide);
}

.friend-code-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
}

.friend-code {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 4px;
  font-family: monospace;
}

.copy-btn {
  background: transparent;
  border: none;
  font-size: 18px;
  cursor: pointer;
  padding: var(--spacing-xs);
}

/* 친구 추가 입력 */
.add-friend-box {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.friend-code-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  border: var(--border-thick) solid var(--border-color);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-align: center;
  font-family: monospace;
}

.friend-code-input::placeholder {
  text-transform: none;
  letter-spacing: normal;
}

.add-friend-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-black);
  color: var(--color-white);
  border: var(--border-thick) solid var(--border-color);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
}

.add-friend-btn:active {
  opacity: 0.8;
}

/* 친구 요청 / 목록 */
.friend-subtitle {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.request-count,
.friend-count {
  font-weight: 400;
  color: var(--text-secondary);
}

.friend-request-list,
.friend-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.friend-request-item,
.friend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-secondary);
  border: var(--border-thick) solid var(--border-color);
}

.friend-avatar {
  width: 40px;
  height: 40px;
  min-width: 40px;
  border-radius: 50%;
  border: var(--border-thick) solid var(--border-color);
  background: var(--color-gray-200);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  overflow: hidden;
}

.friend-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.friend-info {
  flex: 1;
}

.friend-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.friend-points {
  font-size: 12px;
  color: var(--text-secondary);
}

.friend-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.accept-btn,
.reject-btn,
.remove-btn {
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: 12px;
  font-weight: 600;
  border: var(--border-thick) solid var(--border-color);
  cursor: pointer;
}

.accept-btn {
  background: var(--color-black);
  color: var(--color-white);
}

.reject-btn {
  background: var(--color-white);
  color: var(--color-black);
}

.remove-btn {
  background: transparent;
  color: var(--text-secondary);
  border-color: var(--color-gray-300);
  font-size: 11px;
}

.empty-requests,
.empty-friends {
  padding: var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
  font-size: 13px;
}

.friend-requests {
  margin-bottom: var(--spacing-lg);
}

.friend-list-container {
  margin-bottom: var(--spacing-md);
}

/* 빈 리더보드 메시지 */
.empty-leaderboard {
  padding: var(--spacing-xl);
  text-align: center;
  color: var(--text-secondary);
  font-size: 14px;
}

/* ==========================================
   사용자 프로필 페이지 (인스타그램 스타일)
   ========================================== */

.user-profile-container {
  padding-top: calc(var(--header-height) + var(--spacing-md));
  min-height: 100vh;
  background: var(--bg-primary);
}

/* 프로필 헤더 */
.user-profile-header {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: var(--border-thick) solid var(--border-color);
}

.user-profile-top {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.user-avatar-large {
  width: 80px;
  height: 80px;
  min-width: 80px;
  border-radius: 50%;
  border: 3px solid var(--border-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
}

.user-avatar-large img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-placeholder {
  font-size: 36px;
}

.user-stats-row {
  display: flex;
  flex: 1;
  justify-content: space-around;
}

.user-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.user-stat-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
}

.user-stat-label {
  font-size: 12px;
  color: var(--text-secondary);
}

.user-profile-info {
  margin-bottom: var(--spacing-md);
}

.user-display-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px 0;
}

.user-friend-code {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 0;
  font-family: monospace;
}

/* 프로필 액션 버튼 */
.user-profile-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.profile-action-btn {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 14px;
  font-weight: 600;
  border: var(--border-thick) solid var(--border-color);
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.profile-action-btn.primary {
  background: var(--color-black);
  color: var(--color-white);
}

.profile-action-btn.secondary {
  background: var(--color-white);
  color: var(--color-black);
}

.profile-action-btn.danger {
  background: var(--color-white);
  color: #dc2626;
  border-color: #dc2626;
}

/* 탭 네비게이션 */
.user-profile-tabs {
  display: flex;
  border-bottom: var(--border-thick) solid var(--border-color);
}

.user-tab-btn {
  flex: 1;
  padding: var(--spacing-md);
  background: transparent;
  border: none;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  cursor: pointer;
  position: relative;
}

.user-tab-btn.active {
  color: var(--text-primary);
}

.user-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-black);
}

/* 탭 컨텐츠 */
.user-tab-content {
  min-height: 200px;
}

.user-tab-pane {
  display: none;
  padding: var(--spacing-md);
}

.user-tab-pane.active {
  display: block;
}

/* 피드 그리드 (인스타그램 스타일) */
.user-feed-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
}

.feed-grid-item {
  aspect-ratio: 1;
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-secondary);
  position: relative;
}

.feed-grid-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.feed-grid-item .no-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  background: var(--bg-secondary);
}

/* 친구 목록 */
.user-friends-list {
  display: flex;
  flex-direction: column;
}

.user-friend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-gray-200);
  cursor: pointer;
}

.user-friend-item:last-child {
  border-bottom: none;
}

.user-friend-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: var(--border-thick) solid var(--border-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary);
}

.user-friend-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.user-friend-info {
  flex: 1;
}

.user-friend-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.user-friend-points {
  font-size: 12px;
  color: var(--text-secondary);
}

/* 빈 상태 */
.empty-feed,
.empty-friends-tab {
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  color: var(--text-secondary);
}

.empty-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-sm);
}

/* 퀘스트 모달 */
.quest-modal-image {
  width: 100%;
  max-height: 300px;
  overflow: hidden;
  margin-bottom: var(--spacing-md);
}

.quest-modal-image img {
  width: 100%;
  height: auto;
  object-fit: contain;
}

.quest-modal-info h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 var(--spacing-sm) 0;
}

.quest-modal-info p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 var(--spacing-xs) 0;
}

/* 클릭 가능한 리더보드 아이템 */
.leaderboard-item.clickable {
  cursor: pointer;
  transition: background-color 0.2s;
}

.leaderboard-item.clickable:hover {
  background-color: var(--bg-secondary);
}

.leaderboard-item.clickable:active {
  background-color: var(--color-gray-200);
}