:root {
  --primary-color: #4a90e2;
  --bg-color: #f5f7fa;
  --header-bg: #fff;
  --card-bg: #fff;
  --text-color: #333;
  --label-color: #666;
  --border-color: #ddd;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --input-bg: #fff;
  --header-shadow: 0 2px 4px rgba(0,0,0,0.05);
  --card-header-bg: #fafafa;
}

body.dark-mode {
  --bg-color: #1a1a1a;
  --header-bg: #2d2d2d;
  --card-bg: #2d2d2d;
  --text-color: #e0e0e0;
  --label-color: #aaa;
  --border-color: #444;
  --shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
  --input-bg: #3d3d3d;
  --header-shadow: 0 2px 4px rgba(0,0,0,0.3);
  --card-header-bg: #353535;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
  transition: background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
}

header {
  background-color: var(--header-bg);
  padding: 1rem 2rem;
  box-shadow: var(--header-shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  max-width: 800px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-self: end;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary-color);
  text-align: center;
}

.menu-btn {
  font-size: 1.5rem;
  cursor: pointer;
  justify-self: start;
}

.mode-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.auth-btn {
  padding: 0.5rem 1.2rem;
  border-radius: 20px;
  background-color: var(--primary-color);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

main {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem;
}

.fixed-top {
  margin-bottom: 2rem;
}

.target-amount-box, .total-summary-box {
  background: var(--card-bg);
  padding: 1.5rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  text-align: center;
}

.target-amount-box label, .summary-label {
  display: block;
  font-size: 0.9rem;
  color: var(--label-color);
  margin-bottom: 1rem;
  font-weight: 600;
  text-align: left;
}

.display-wrapper.centered {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  min-height: 3rem;
}

.value-underline-group {
  display: inline-flex;
  align-items: baseline;
  padding-bottom: 0.2rem;
}

.setting-btn {
  position: absolute;
  right: 0;
}

.summary-value-small {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-color);
}

.value-underline-group .unit {
  font-size: 1.4rem;
  font-weight: 700;
  margin-left: 0.3rem;
  color: var(--text-color);
}

.summary-value {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary-color);
  padding-bottom: 0.2rem;
}

.input-wrapper {
  display: flex;
  align-items: center;
  border-bottom: 2px solid var(--primary-color);
}

.input-wrapper input {
  flex: 1;
  border: none;
  background: transparent;
  color: var(--text-color);
  font-size: 1.2rem;
  padding: 0.5rem 0;
  outline: none;
  font-weight: 700;
  -moz-appearance: textfield;
}

.input-wrapper input::-webkit-outer-spin-button,
.input-wrapper input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.draggable-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.expense-card {
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s, opacity 0.2s;
  cursor: default;
}

.expense-card.dragging {
  opacity: 0.5;
  transform: scale(0.95);
  border: 2px dashed var(--primary-color);
}

.card-header {
  padding: 1rem;
  background-color: var(--card-header-bg);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
}

.drag-handle {
  cursor: move;
  margin-right: 1rem;
  color: #ccc;
  font-size: 1.2rem;
  user-select: none;
}

.card-title {
  font-weight: 700;
  color: var(--text-color);
}

.card-body {
  padding: 1.5rem;
}

.input-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.input-row:last-child {
  margin-bottom: 0;
}

.clickable-row {
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 8px;
  transition: background-color 0.2s;
}

.clickable-row:hover {
  background-color: rgba(0,0,0,0.03);
}

body.dark-mode .clickable-row:hover {
  background-color: rgba(255,255,255,0.03);
}

.label-btn {
  background: none;
  border: 1px solid var(--primary-color);
  color: var(--primary-color);
  padding: 0.3rem 0.8rem;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s;
  pointer-events: none; /* Let the row handle the click */
}

.actual-display-group {
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text-color);
  display: flex;
  align-items: baseline;
  gap: 0.2rem;
}

.actual-display-group .unit {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--label-color);
}

.input-with-clear {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.input-with-clear .unit {
  font-size: 0.9rem;
  color: var(--label-color);
}

.clear-btn {
  background: var(--border-color);
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-color);
  font-size: 16px;
  line-height: 1;
  transition: background 0.2s, color 0.2s;
}

.clear-btn:hover {
  filter: brightness(0.9);
}

.list-management {
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
}

.action-btn {
  background-color: var(--primary-color);
  color: white;
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 25px;
  font-weight: 700;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: transform 0.2s, background-color 0.2s;
}

.action-btn:hover {
  background-color: #357abd;
  transform: translateY(-2px);
}

.card-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.header-budget {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-right: 0.5rem;
}

.rename-btn, .delete-btn {
  background: none;
  border: 1px solid var(--border-color);
  color: var(--text-color);
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.rename-btn:hover {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.delete-btn:hover {
  background-color: #ff4d4f;
  color: white;
  border-color: #ff4d4f;
}

.card-title[contenteditable="true"] {
  border-bottom: 2px solid var(--primary-color);
  outline: none;
  padding: 0 0.5rem;
  background: var(--input-bg);
}

.input-row input, .settings-item input, .detail-item input {
  width: 150px;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  background-color: var(--input-bg);
  color: var(--text-color);
  text-align: right;
  font-weight: 600;
  -moz-appearance: textfield;
}

/* Chrome, Safari, Edge, Opera */
.input-row input::-webkit-outer-spin-button,
.input-row input::-webkit-inner-spin-button,
.settings-item input::-webkit-outer-spin-button,
.settings-item input::-webkit-inner-spin-button,
.detail-item input::-webkit-outer-spin-button,
.detail-item input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.input-row input:focus {
  border-color: var(--primary-color);
  outline: none;
}

@media (max-width: 600px) {
  .header-container {
    padding: 0.5rem 1rem;
    grid-template-columns: auto auto auto;
    justify-content: space-between;
  }
}

/* Custom Modal Styles */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  max-width: 400px;
  width: 90%;
  text-align: center;
  transform: translateY(-20px);
  transition: all 0.3s ease;
}

.settings-content, .actual-detail-content {
  max-width: 500px;
}

.modal-overlay.active .modal-content {
  transform: translateY(0);
}

.modal-content h3 {
  margin-bottom: 1rem;
  color: var(--text-color);
}

.modal-content p {
  margin-bottom: 1.5rem;
  color: var(--label-color);
}

.detail-header {
  display: flex;
  justify-content: flex-end;
  margin-bottom: 1rem;
}

.detail-items-list, .settings-list {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 2rem;
  text-align: left;
}

.detail-item, .settings-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--border-color);
  gap: 1rem;
}

.detail-item input.name-input {
  flex: 1;
  text-align: left;
}

.detail-item input.val-input {
  width: 120px;
}

.detail-footer {
  margin-bottom: 1.5rem;
  padding-top: 1rem;
  border-top: 2px solid var(--primary-color);
}

.detail-total-row {
  display: flex;
  justify-content: space-between;
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--primary-color);
}

.modal-actions {
  display: flex;
  justify-content: center;
  gap: 1rem;
}

.modal-btn {
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: none;
  color: var(--text-color);
  transition: all 0.2s;
}

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

.modal-btn.confirm {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-color);
}

.modal-btn.confirm:hover {
  filter: brightness(0.9);
}

/* Partnership Section */
.partnership-section {
  max-width: 800px;
  margin: 2rem auto;
  padding: 0 1rem 4rem;
}

.partnership-container {
  background-color: var(--card-bg);
  padding: 2rem;
  border-radius: 12px;
  box-shadow: var(--shadow);
  text-align: center;
}

.partnership-container h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.partnership-container p {
  font-size: 0.9rem;
  color: var(--label-color);
  margin-bottom: 2rem;
}

.partnership-form {
  text-align: left;
}

.form-group {
  margin-bottom: 1.2rem;
}

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text-color);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background-color: var(--input-bg);
  color: var(--text-color);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-color);
}

.submit-btn {
  width: 100%;
  padding: 1rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: opacity 0.2s;
}

.submit-btn:hover {
  opacity: 0.9;
}

/* Sidebar Styles */
.sidebar-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
}

.sidebar {
  position: fixed;
  top: -100%;
  left: 0;
  width: 100%;
  max-height: 80%;
  background-color: var(--card-bg);
  z-index: 1001;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  display: flex;
  flex-direction: column;
  border-bottom-left-radius: 20px;
  border-bottom-right-radius: 20px;
  overflow-y: auto;
}

.sidebar.active {
  top: 0;
}

.sidebar-header {
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.sidebar-logo {
  font-size: 1.2rem;
  font-weight: 800;
  color: var(--primary-color);
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.8rem;
  color: var(--text-color);
  cursor: pointer;
}

.sidebar-nav {
  flex: 1;
  padding: 1rem 0;
}

.sidebar-nav ul {
  list-style: none;
}

.sidebar-nav li a {
  display: block;
  padding: 1rem 1.5rem;
  text-decoration: none;
  color: var(--text-color);
  font-weight: 500;
  transition: background 0.2s;
}

.sidebar-nav li a:hover {
  background-color: rgba(74, 144, 226, 0.1);
  color: var(--primary-color);
}

.sidebar-footer {
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
}

.sidebar-partnership {
  padding: 1rem;
  box-shadow: none;
  border: 1px solid var(--border-color);
}

.sidebar-partnership h3 {
  font-size: 1rem;
}

.sidebar-partnership p {
  font-size: 0.8rem;
  margin-bottom: 1rem;
}

.sidebar-partnership .form-group {
  margin-bottom: 0.8rem;
}

.sidebar-partnership input, 
.sidebar-partnership textarea {
  padding: 0.6rem;
  font-size: 0.85rem;
}

.sidebar-partnership .submit-btn {
  padding: 0.7rem;
  font-size: 0.9rem;
}

/* Info Sections for AdSense Value */
.info-section {
  margin-top: 4rem;
  padding: 2rem;
  background-color: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

.info-section h2 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  text-align: center;
}

.info-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.info-card {
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  transition: transform 0.2s;
}

.info-card:hover {
  transform: translateY(-5px);
}

.info-card h3 {
  margin-bottom: 1rem;
  font-size: 1.1rem;
  color: var(--text-color);
}

.info-card p {
  font-size: 0.9rem;
  color: var(--label-color);
}

.text-block p {
  line-height: 1.8;
  color: var(--text-color);
}

/* Footer Styles */
.site-footer {
  margin-top: 5rem;
  padding: 3rem 1rem;
  background-color: var(--header-bg);
  border-top: 1px solid var(--border-color);
  text-align: center;
}

.footer-container {
  max-width: 800px;
  margin: 0 auto;
}

.footer-container p {
  font-size: 0.9rem;
  color: var(--label-color);
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.footer-links a {
  color: var(--primary-color);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 600;
}

/* Legal Content Styles */
.legal-content {
  max-width: 600px;
  text-align: left;
}

.legal-text {
  max-height: 400px;
  overflow-y: auto;
  margin-bottom: 2rem;
  padding: 1rem;
  background-color: var(--bg-color);
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.legal-text p {
  margin-bottom: 1rem;
}

/* Info Modal Content Styles */
.info-modal-content {
  max-width: 500px;
  text-align: left;
}

.info-modal-body {
  margin: 1.5rem 0;
  max-height: 400px;
  overflow-y: auto;
  padding-right: 0.5rem;
}

.info-item {
  margin-bottom: 1.5rem;
}

.info-item h4 {
  color: var(--primary-color);
  margin-bottom: 0.5rem;
  font-size: 1.05rem;
}

.info-item p {
  font-size: 0.9rem;
  color: var(--text-color);
  line-height: 1.6;
}

.info-modal-body ul {
  padding-left: 1.2rem;
  margin-top: 1rem;
}

.info-modal-body li {
  margin-bottom: 0.8rem;
  font-size: 0.9rem;
  color: var(--text-color);
  line-height: 1.6;
}