/* ── rem 기준값 (boilerplate-2026 공식 이식) ────────────────────────────────
 * html 기준을 10px 로 두어 px → rem 계산을 눈으로 할 수 있게 한다: 1.4rem = 14px.
 * 좁은 화면(500px 이하)에서는 기준값이 유동적으로 커져 rem 로 쓴 값이 함께 늘어난다.
 *
 * body 에 1.6rem(=16px)을 명시하는 이유: html 을 10px 로 낮추면 글자 크기를
 * 지정하지 않은 요소가 모두 10px 로 상속돼 버린다. 기존 화면과 같게 유지한다.
 * 기존 px 값은 그대로 두고, 새로 쓰는 치수만 rem 으로 적으면 된다.
 * ────────────────────────────────────────────────────────────────────────── */
html {
  font-size: 10px;
  text-size-adjust: 100%;
}

@media (max-width: 500px) {
  html { font-size: calc(10px + 0.0266 * (100vw - 375px)); }
}

body { font-size: 1.6rem; }

/* 이미지 기본 규칙 — 컨테이너를 넘지 않고 비율 유지 (docs/rem-convention.md '이미지 규칙').
   HTML 의 width·height 속성은 레이아웃 흔들림(CLS) 방지용이라 남기고,
   실제 표시 크기는 CSS 가 정한다 → height:auto 로 속성값을 덮는다. */
img, svg, video { max-width: 100%; }
img, video { height: auto; }

/* ==================== CSS Variables ==================== */
:root {
  /* Colors - Dark Theme */
  --color-bg-primary: #0f172a;
  --color-bg-secondary: #1e293b;
  --color-bg-tertiary: #1f2937;
  --color-bg-input: #0f172a;

  --color-border-primary: #334155;
  --color-border-secondary: #475569;
  --color-border-focus: #64748b;

  --color-text-primary: #f1f5f9;
  --color-text-secondary: #e2e8f0;
  --color-text-tertiary: #cbd5e1;
  --color-text-muted: #94a3b8;
  --color-text-placeholder: #64748b;

  /* Accent Colors */
  --color-blue: #3b82f6;
  --color-blue-hover: #2563eb;
  --color-blue-light: #60a5fa;

  --color-red: #ff4757;
  --color-red-hover: #ee5a6f;

  --color-orange: #f59e0b;

  --color-income: #2196F3;
  --color-expense: #ff4757;

  /* Spacing */
  --spacing-xs: 5px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 15px;
  --spacing-xl: 20px;
  --spacing-2xl: 25px;
  --spacing-3xl: 30px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-xl: 15px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-size-sm: 14px;
  --font-size-base: 15px;
  --font-size-md: 16px;
  --font-size-lg: 1.5em;
  --font-size-xl: 2.5em;
}

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

body {
  font-family: var(--font-family);
  background: var(--color-bg-primary);
  padding: var(--spacing-xl);
  min-height: 100vh;
  color: var(--color-text-primary);
}

body.modal-open {
  overflow: hidden;
}

/* ==================== Layout ==================== */
.container {
  max-width: 900px;
  margin: 0 auto;
}

/* ==================== Page Header ==================== */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

.page-header h1 {
  margin: 0;
  text-align: left;
  font-size: var(--font-size-xl);
}

.page-header-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 600;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border-secondary);
}

.btn-logout {
  padding: 10px 20px;
}

/* 햄버거 토글 — 데스크톱에서는 숨김 */
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid var(--color-border-primary);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 0;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text-secondary);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}
.page-header.menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.page-header.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}
.page-header.menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ==================== 모바일 (≤720px) ==================== */
@media (max-width: 720px) {
  .container { padding: 0 14px; }

  .page-header {
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
  }
  .page-header h1 {
    font-size: 1.3em;
    flex: 1;
  }
  .menu-toggle {
    display: inline-flex;
  }
  .page-header-actions {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 8px;
    margin-top: 12px;
    padding: 12px;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border-primary);
    border-radius: var(--radius-md);
  }
  .page-header.menu-open .page-header-actions {
    display: flex;
  }
  .page-header-actions .nav-link,
  .page-header-actions .btn-danger {
    width: 100%;
    justify-content: center;
    padding: 12px;
    text-align: center;
  }
}

/* ==================== Label Colors ==================== */
.label-income {
  color: var(--color-income);
}

.label-expense {
  color: var(--color-expense);
}

/* ==================== Typography ==================== */
h1 {
  text-align: center;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-3xl);
  font-size: var(--font-size-xl);
  font-weight: 700;
}

h2 {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* ==================== Sections ==================== */
.section {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-2xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border-primary);
}

.summary {
  background: var(--color-bg-tertiary);
  color: white;
  position: relative;
  overflow: hidden;
}

.summary h2 {
  color: white;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  padding-bottom: 10px;
  margin-bottom: var(--spacing-xl);
}

/* ==================== Form Elements ==================== */
.input-group {
  margin-bottom: var(--spacing-lg);
}

.input-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-tertiary);
  font-weight: 600;
}

.input-group input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid var(--color-border-secondary);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-md);
  transition: border-color var(--transition-fast);
  background: var(--color-bg-input);
  color: var(--color-text-primary);
}

.input-group input:focus {
  outline: none;
  border-color: var(--color-border-focus);
  background: var(--color-bg-secondary);
}

.input-group input::placeholder {
  text-align: right;
  color: var(--color-text-placeholder);
  font-size: var(--font-size-sm);
}

.input-group input[readonly] {
  background-color: var(--color-border-primary);
  cursor: not-allowed;
  color: var(--color-text-primary);
  font-weight: 600;
}

.input-group input[readonly]::placeholder {
  color: var(--color-text-muted);
}

/* ==================== Buttons ==================== */
.btn-primary {
  background: var(--color-blue);
  color: white;
  border: none;
  padding: var(--spacing-md) 24px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition-fast);
  margin-top: var(--spacing-sm);
}

/* 탭 컨텐츠 내부 추가 버튼은 전체 너비로 */
.tab-content > button.btn-primary {
  width: 100%;
}

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

.btn-primary:disabled {
  background: #ccc;
  cursor: not-allowed;
}

.btn-danger {
  background: var(--color-red);
  color: white;
  border: none;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.btn-quick {
  background: var(--color-border-primary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex: 1;
}

.btn-quick:hover {
  background: var(--color-border-secondary);
  border-color: var(--color-border-focus);
}

.quick-amounts {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

/* ==================== Expense Items ==================== */
.expense-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md);
  background: var(--color-bg-input);
  border-radius: var(--radius-md);
  margin-bottom: 10px;
  border: 1px solid var(--color-border-primary);
}

.expense-item span:first-child {
  font-weight: 600;
  color: var(--color-text-secondary);
}

.expense-item > div {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  white-space: nowrap;
}

.expense-item > div > span {
  color: var(--color-blue-light);
  font-weight: 700;
}

#fixedExpensesList,
#temporaryExpensesList,
#expectedIncomeList {
  margin-top: var(--spacing-lg);
}

#fixedExpensesList .expense-item {
  border-left: 4px solid var(--color-blue);
}

#temporaryExpensesList .expense-item {
  border-left: 4px solid var(--color-orange);
}

#expectedIncomeList .expense-item {
  border-left: 4px solid var(--color-income);
}

/* ==================== Tabs ==================== */
.tab-header {
  display: flex;
  gap: 0;
  margin-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border-primary);
}

.tab-btn {
  flex: 1;
  padding: 10px 0;
  background: none;
  border: none;
  color: var(--color-text-muted);
  font-size: 1.7rem;
  font-weight: 600;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-default);
}

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

.tab-btn.active {
  color: var(--color-blue);
  border-bottom-color: var(--color-blue);
}

.tab-content {
  display: none;
}

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

/* ==================== Summary Items ==================== */
.summary-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.summary-item:last-of-type,
.summary-item:has(+ .summary-item.highlight) {
  border-bottom: none;
}

.summary-item.highlight {
  padding-top: var(--spacing-xl);
  margin-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.4);
  font-size: 1.3em;
  font-weight: 700;
}

.amount {
  font-weight: 600;
}

.amount-large {
  font-size: 1.5em;
  font-weight: 800;
}

.btn-toggle-view {
  display: block;
  margin-left: auto;
  margin-top: 8px;
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 20px;
  color: var(--color-text-muted);
  font-size: 1.3rem;
  cursor: pointer;
  transition: var(--transition-default);
}

.btn-toggle-view:hover {
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn-toggle-view.active {
  color: var(--color-blue);
  border-color: var(--color-blue);
}

/* ==================== Modal ==================== */
.modal {
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-3xl);
  border-radius: var(--radius-xl);
  max-width: 1000px;
  width: 90%;
  max-height: 80vh;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border-primary);
}

.close {
  position: absolute;
  right: var(--spacing-xl);
  top: var(--spacing-lg);
  font-size: 35px;
  font-weight: bold;
  color: var(--color-text-muted);
  cursor: pointer;
  line-height: 20px;
}

.close:hover {
  color: var(--color-text-primary);
}

.modal-layout {
  display: flex;
  gap: var(--spacing-xl);
  overflow: hidden;
  flex: 1;
  margin-top: var(--spacing-xl);
}

.month-buttons-container {
  min-width: 180px;
  max-width: 180px;
  overflow-y: auto;
  border-right: 2px solid var(--color-border-primary);
  padding-right: var(--spacing-lg);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-secondary) transparent;
}

.month-buttons-container::-webkit-scrollbar {
  width: 6px;
}

.month-buttons-container::-webkit-scrollbar-track {
  background: transparent;
}

.month-buttons-container::-webkit-scrollbar-thumb {
  background-color: var(--color-border-secondary);
  border-radius: 3px;
}

.month-detail-container {
  flex: 1;
  overflow-y: auto;
  padding-right: 10px;
}

/* ==================== Monthly Records ==================== */
.monthly-record {
  background: var(--color-bg-input);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  border-left: 5px solid var(--color-blue);
  border: 1px solid var(--color-border-primary);
}

.monthly-record h3 {
  color: var(--color-blue-light);
  margin-bottom: var(--spacing-lg);
}

.monthly-record-item {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border-primary);
  color: var(--color-text-tertiary);
}

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

.btn-month {
  display: block;
  width: 100%;
  background: var(--color-bg-input);
  color: var(--color-text-tertiary);
  border: 2px solid var(--color-border-secondary);
  padding: var(--spacing-md) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-bottom: 10px;
  text-align: center;
}

.btn-month:hover {
  background: var(--color-border-primary);
  color: white;
  border-color: var(--color-blue);
  transform: translateX(5px);
}

.btn-month.active {
  background: var(--color-blue);
  color: white;
  border-color: var(--color-blue);
}

/* ==================== Floating Action Buttons ==================== */
.fab-container {
  position: fixed;
  bottom: var(--spacing-3xl);
  right: var(--spacing-3xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  z-index: 999;
}

.fab {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
  transition: all var(--transition-base);
  color: white;
}

.fab:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.5);
}

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

.fab-save {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.fab-save:hover {
  background: linear-gradient(135deg, #5568d3 0%, #62408a 100%);
}

.fab-list {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.fab-list:hover {
  background: linear-gradient(135deg, #d77ee0 0%, #d94a5d 100%);
}

.fab svg {
  width: 24px;
  height: 24px;
}

.save-monthly-info {
  position: fixed;
  bottom: 140px;
  right: var(--spacing-3xl);
  background: var(--color-bg-secondary);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  box-shadow: var(--shadow-md);
  z-index: 998;
  max-width: 200px;
  text-align: right;
  border: 1px solid var(--color-border-primary);
}

/* ==================== Responsive ==================== */
@media (max-width: 768px) {
  body {
    padding: 0;
  }

  .container {
    padding: 0;
    display: flex;
    flex-direction: column;
  }

  /* 헤더 영역 고정 */
  .container > div:first-child {
    padding: var(--spacing-md);
    flex-shrink: 0;
  }

  /* 섹션 Swiper 컨테이너 */
  .sections-swiper {
    flex: 1;
    width: 100%;
    height: 100%;
    padding: var(--spacing-md);
  }

  .sections-swiper .swiper-slide {
    height: auto;
  }

  .sections-swiper .section {
    margin-bottom: 0;
  }

  /* 이번달/다음달 결과 부분 폰트 크기 축소 */
  .summary-item.highlight {
    font-size: 1.1em;
  }

  .summary-item.highlight span:first-child {
    font-size: 0.9em;
  }

  .amount-large {
    font-size: 1.2em;
  }

  /* 월간 가계부 저장 버튼 - 세로 정렬 */
  .section button.btn-primary {
    width: 100%;
    margin-left: 0 !important;
    margin-bottom: var(--spacing-sm);
  }

  .section button.btn-primary:last-of-type {
    margin-bottom: 0;
  }

  /* 모달 모바일 최적화 */
  .modal-content {
    width: 95%;
    max-height: 90vh;
    padding: var(--spacing-xl);
  }

  .modal-content h2 {
    font-size: 1.3em;
    margin-bottom: var(--spacing-md);
  }

  .close {
    right: var(--spacing-md);
    top: var(--spacing-md);
    font-size: 28px;
  }

  /* 월간 가계부 모달 레이아웃 - 세로로 변경 */
  .modal-layout {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .month-buttons-container {
    min-width: 100%;
    max-width: 100%;
    border-right: none;
    border-bottom: 2px solid var(--color-border-primary);
    padding-bottom: var(--spacing-md);
    max-height: none;
  }

  /* 월 버튼 Swiper */
  .month-buttons-swiper {
    width: 100%;
  }

  .month-buttons-swiper .swiper-slide {
    width: auto;
  }

  .month-detail-container {
    padding-right: 0;
    max-height: calc(90vh - 300px);
  }

  /* 월 버튼 모바일 최적화 */
  .btn-month {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
    min-width: 120px;
    white-space: nowrap;
    width: 100%;
  }

  .btn-month:hover {
    transform: translateX(0);
  }

  /* FAB 모바일 최적화 */
  .fab-container {
    bottom: var(--spacing-xl);
    right: var(--spacing-md);
    gap: var(--spacing-sm);
  }

  .fab {
    width: 52px;
    height: 52px;
  }

  .fab svg {
    width: 22px;
    height: 22px;
  }

  .save-monthly-info {
    bottom: 120px;
    right: var(--spacing-md);
    max-width: 160px;
    font-size: 12px;
  }

  /* 월간 기록 카드 모바일 최적화 */
  .monthly-record {
    padding: var(--spacing-md);
  }

  .monthly-record h3 {
    font-size: 1.1em;
    margin-bottom: var(--spacing-md);
  }

  .monthly-record-item {
    font-size: var(--font-size-sm);
    padding: var(--spacing-xs) 0;
    flex-wrap: wrap;
  }

  .monthly-record-item span {
    word-break: break-word;
  }
}