:root {
  --color-bg: #f5f4ef;
  --color-surface: #ffffff;
  --color-text: #2b2a27;
  --color-text-muted: #6b6a66;
  --color-accent: #d97757;
  --color-accent-hover: #c15f3c;
  --color-accent-rgb: 217, 119, 87;
  --color-border: #e8e6df;
  --color-success: #4f7a5a;
  --color-success-tint: rgba(79, 122, 90, 0.08);
  --color-danger: #b3543f;

  --radius-card: 14px;
  --radius-control: 10px;
  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.04);

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Pretendard", "Malgun Gothic", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1f1e1b;
    --color-surface: #2a2926;
    --color-text: #edebe4;
    --color-text-muted: #a8a69f;
    --color-accent: #e08962;
    --color-accent-hover: #eb9c78;
    --color-accent-rgb: 224, 137, 98;
    --color-border: #3a3833;
    --color-success: #6fa47c;
    --color-success-tint: rgba(111, 164, 124, 0.14);
    --color-danger: #d97c68;
    --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.2);
  }
}

* {
  box-sizing: border-box;
}

[x-cloak] {
  display: none !important;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.app-shell {
  max-width: 640px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-2) var(--space-4);
}

@media (min-width: 900px) {
  .app-shell {
    max-width: 760px;
    padding-top: var(--space-4);
  }
  .app-shell.wide {
    max-width: 960px;
  }
}

h1,
h2,
h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin: 0 0 var(--space-2);
}

h1 {
  font-size: 22px;
}

h2 {
  font-size: 17px;
}

p {
  margin: 0 0 var(--space-2);
  color: var(--color-text-muted);
}

/* iOS 홈 화면 추가 안내 배너 */
.ios-install-banner {
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  box-shadow: var(--shadow-card);
  padding: 10px 12px;
  margin-bottom: var(--space-2);
  font-size: 13px;
  color: var(--color-text);
}

.ios-install-banner button {
  flex-shrink: 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
}

/* 상단 네비게이션 */
.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
}

.top-nav .brand {
  font-weight: 600;
  font-size: 17px;
}

.top-nav .nav-links {
  display: flex;
  gap: var(--space-2);
}

.top-nav .nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 14px;
  padding: 6px 10px;
  border-radius: var(--radius-control);
}

.top-nav .nav-links a.active {
  color: var(--color-text);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.top-nav .nav-user {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 13px;
  color: var(--color-text-muted);
}

.btn-link {
  background: none;
  border: none;
  padding: 0;
  font: inherit;
  font-size: 13px;
  color: var(--color-text-muted);
  text-decoration: underline;
  cursor: pointer;
}

/* 카드 */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-3);
  margin-bottom: var(--space-2);
}

/* 버튼 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  gap: 6px;
  border: none;
  border-radius: var(--radius-control);
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  font-family: inherit;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

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

.btn-danger-ghost {
  background: transparent;
  color: var(--color-danger);
  border: 1px solid var(--color-border);
}

.btn-block {
  width: 100%;
}

/* 입력 */
input[type="text"],
input[type="time"],
input[type="password"] {
  width: 100%;
  font-family: inherit;
  font-size: 15px;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: var(--color-bg);
  color: var(--color-text);
}

label {
  display: block;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.field {
  margin-bottom: var(--space-2);
}

.form-error-text {
  color: var(--color-danger);
  font-size: 13px;
  margin: -8px 0 var(--space-2);
  min-height: 1em;
}

/* 탭 */
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.tabs a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 14px;
  padding: 10px 4px;
  margin-right: var(--space-2);
  border-bottom: 2px solid transparent;
}

.tabs a.active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
  font-weight: 600;
}

/* 요일 선택 pill */
.weekday-picker {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.weekday-pill {
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.weekday-pill.selected {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.everyday-btn {
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  font-size: 13px;
  padding: 8px 14px;
  cursor: pointer;
  margin-left: 4px;
}

.everyday-btn.selected {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 습관 리스트 아이템 */
.habit-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px var(--space-2);
  padding: 12px 4px;
  border-bottom: 1px solid var(--color-border);
}

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

.habit-item.today-checked {
  background: var(--color-success-tint);
  border-radius: var(--radius-control);
  margin: 0 -4px;
  padding-left: 8px;
  padding-right: 8px;
}

.habit-item-main {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  flex: 1 1 auto;
}

.habit-item-name {
  font-size: 15px;
  overflow-wrap: break-word;
  word-break: break-word;
}

.habit-item-condition {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.habit-item-meta {
  font-size: 12px;
  color: var(--color-text-muted);
}

.habit-item-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 6px;
}

.drag-handle {
  flex-shrink: 0;
  cursor: grab;
  color: var(--color-text-muted);
  font-size: 18px;
  line-height: 1;
  padding: 4px 2px;
  touch-action: none;
  user-select: none;
}

.sortable-ghost {
  opacity: 0.4;
}

.sortable-chosen .habit-item {
  background: var(--color-bg);
  border-radius: var(--radius-control);
}

.habit-item-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.check-indicator {
  width: 26px;
  height: 26px;
  padding: 0;
  margin: 0;
  border-radius: 50%;
  border: 2px solid var(--color-border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  background: transparent;
  font-family: inherit;
  font-size: 13px;
  line-height: 1;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.check-indicator.checked {
  background: var(--color-success);
  border-color: var(--color-success);
  color: #fff;
}

.empty-state {
  text-align: center;
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-2);
  font-size: 14px;
}

.badge {
  display: inline-block;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--color-bg);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

/* 월별 캘린더 */
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 4px;
  margin-bottom: 4px;
}

.calendar-weekday {
  text-align: center;
  font-size: 12px;
  color: var(--color-text-muted);
  padding: 4px 0;
}

.calendar-cell {
  aspect-ratio: 1;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.calendar-cell.muted {
  opacity: 0.35;
}

.calendar-date {
  font-size: 12px;
  font-weight: 500;
}

.calendar-ratio {
  font-size: 10px;
  color: var(--color-text-muted);
}

/* 주별 매트릭스 */
.week-matrix {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}

.week-matrix th,
.week-matrix td {
  padding: 10px 8px;
  text-align: center;
  border-bottom: 1px solid var(--color-border);
}

.week-matrix th:first-child,
.week-matrix td:first-child {
  text-align: left;
}

.week-matrix th {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 12px;
}

.wm-check {
  color: var(--color-success);
  font-weight: 700;
}

.wm-dash {
  color: var(--color-border);
}