/* === Base Styles === */
:root {
  /* Main Colors */
  --primary-color: #2196F3;
  --success-color: #4CAF50;
  --warning-color: #FFC107;
  --danger-color: #F44336;
  --accent-color: #9C27B0;
  
  /* Light Theme */
  --light-bg: #f5f7fa;
  --light-card-bg: #ffffff;
  --light-text: #333333;
  --light-text-secondary: #666666;
  --light-border: #e0e0e0;
  --light-hover: #f0f0f0;
  
  /* Dark Theme */
  --dark-bg: #1a1a2e;
  --dark-card-bg: #222236;
  --dark-text: #f0f0f0;
  --dark-text-secondary: #b0b0b0;
  --dark-border: #444444;
  --dark-hover: #2d2d44;
  
  /* Gradients */
  --primary-gradient: linear-gradient(135deg, #2196F3, #21CBF3);
  --success-gradient: linear-gradient(135deg, #4CAF50, #8BC34A);
  --warning-gradient: linear-gradient(135deg, #FFC107, #FF9800);
  --danger-gradient: linear-gradient(135deg, #F44336, #FF5722);
  --accent-gradient: linear-gradient(135deg, #9C27B0, #673AB7);
  
  /* Default Theme (Light) */
  --bg-color: var(--light-bg);
  --card-bg: var(--light-card-bg);
  --text-color: var(--light-text);
  --text-secondary: var(--light-text-secondary);
  --border-color: var(--light-border);
  --hover-color: var(--light-hover);
  
  /* Other Variables */
  --border-radius: 12px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
  --header-height: 70px;
  --footer-height: 60px;
}

/* Dark Theme Class */
.dark-theme {
  --bg-color: var(--dark-bg);
  --card-bg: var(--dark-card-bg);
  --text-color: var(--dark-text);
  --text-secondary: var(--dark-text-secondary);
  --border-color: var(--dark-border);
  --hover-color: var(--dark-hover);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  transition: var(--transition);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

main.container {
  flex: 1;
  padding-top: 20px;
  padding-bottom: 40px;
}

h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 1rem;
  color: var(--text-color);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.75rem;
}

h3 {
  font-size: 1.4rem;
}

p {
  margin-bottom: 1rem;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  text-decoration: underline;
}

button {
  cursor: pointer;
  font-family: inherit;
}

input, select, button {
  font-size: 1rem;
}

/* === Header Styles === */
.app-header {
  background: var(--primary-gradient);
  color: white;
  padding: 15px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
}

.logo {
  height: 40px;
  margin-right: 10px;
}

.main-nav {
  display: flex;
  gap: 15px;
}

.nav-btn, .theme-toggle {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  transition: var(--transition);
}

.nav-btn:hover, .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

/* === Footer Styles === */
.app-footer {
  background-color: var(--card-bg);
  color: var(--text-secondary);
  padding: 20px 0;
  border-top: 1px solid var(--border-color);
  text-align: center;
  margin-top: auto;
}

/* === Button Styles === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: var(--border-radius);
  font-weight: 500;
  border: none;
  transition: var(--transition);
  gap: 8px;
}

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

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

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

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

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

.btn-icon {
  background: transparent;
  border: none;
  color: var(--text-color);
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  transition: var(--transition);
}

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

/* === View Management === */
.view {
  display: none;
}

.active-view {
  display: block;
}

/* === Dashboard Styles === */
.dashboard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.financial-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 20px;
  margin-bottom: 24px;
}

.summary-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

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

.summary-card h3 {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
}

.amount {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

.next-renewal {
  font-size: 1.1rem;
}

.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 24px;
}

.filter-container {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 24px;
  align-items: center;
}

.search-box {
  position: relative;
  flex: 1;
  min-width: 200px;
}

.search-box input {
  width: 100%;
  padding: 12px 40px 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: var(--transition);
}

.search-box i {
  position: absolute;
  right: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-secondary);
}

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

.filter-options {
  display: flex;
  gap: 15px;
}

.filter-options select {
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--card-bg);
  color: var(--text-color);
  transition: var(--transition);
  cursor: pointer;
}

.filter-options select:focus {
  outline: none;
  border-color: var(--primary-color);
}

.subscriptions-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.subscription-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  cursor: grab;
  position: relative;
  overflow: hidden;
}

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

.card-header {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-bottom: 15px;
}

.card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: white;
  border-radius: 8px;
  font-size: 1.2rem;
}

.card-title {
  flex: 1;
}

.card-title h3 {
  margin-bottom: 5px;
  font-size: 1.2rem;
}

.badge {
  display: inline-block;
  padding: 3px 8px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
}

.badge-monthly {
  background-color: rgba(33, 150, 243, 0.2);
  color: var(--primary-color);
}

.badge-yearly {
  background-color: rgba(156, 39, 176, 0.2);
  color: var(--accent-color);
}

.card-body {
  margin-bottom: 15px;
}

.card-info {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

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

.card-info-value {
  font-weight: 500;
}

.card-price {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary-color);
  text-align: right;
}

.card-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.card-btn {
  background-color: var(--hover-color);
  border: none;
  border-radius: 50%;
  width: 35px;
  height: 35px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
  font-size: 0.9rem;
  transition: var(--transition);
}

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

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

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 40px;
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.empty-state-img {
  width: 150px;
  margin-bottom: 20px;
}

/* === Form Styles === */
.form-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

#subscription-form {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--box-shadow);
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--bg-color);
  color: var(--text-color);
  transition: var(--transition);
}

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

.radio-group, .checkbox-group {
  display: flex;
  gap: 20px;
}

.radio-label, .checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.icon-selector {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(50px, 1fr));
  gap: 10px;
  max-height: 150px;
  overflow-y: auto;
  padding: 10px;
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.icon-option {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 1.5rem;
}

.icon-option:hover {
  background-color: var(--hover-color);
}

.icon-option.selected {
  background-color: var(--primary-color);
  color: white;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  gap: 15px;
  margin-top: 30px;
}

/* === Charts View Styles === */
.view-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.charts-filters {
  margin-bottom: 24px;
}

.charts-filters select {
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  background-color: var(--card-bg);
  color: var(--text-color);
}

.charts-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

.chart-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
}

.chart-wrapper {
  position: relative;
  height: 300px;
}

/* === Settings View Styles === */
.settings-container {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--box-shadow);
}

.settings-group {
  margin-bottom: 30px;
}

.settings-group h3 {
  font-size: 1.2rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 15px;
}

.setting-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

.theme-toggle-container {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Switch Toggle */
.switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--border-color);
  transition: var(--transition);
}

.slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: var(--transition);
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:focus + .slider {
  box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(26px);
}

.slider.round {
  border-radius: 34px;
}

.slider.round:before {
  border-radius: 50%;
}

/* === History View Styles === */
.history-actions {
  margin-bottom: 24px;
  text-align: right;
}

.history-container {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  padding: 20px;
  box-shadow: var(--box-shadow);
}

.history-item {
  padding: 15px;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.history-item:hover {
  background-color: var(--hover-color);
}

.history-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 10px;
}

.history-service {
  font-weight: 600;
}

.history-date {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.history-changes {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.history-change {
  display: flex;
  gap: 10px;
}

.change-field {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.change-value {
  display: flex;
  gap: 10px;
  align-items: center;
}

.old-value {
  text-decoration: line-through;
  color: var(--danger-color);
}

.new-value {
  color: var(--success-color);
}

/* === Responsive Styles === */
@media (max-width: 768px) {
  .financial-summary {
    grid-template-columns: 1fr;
  }
  
  .action-buttons {
    flex-direction: column;
  }
  
  .filter-container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .charts-container {
    grid-template-columns: 1fr;
  }
  
  .setting-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  
  .form-actions {
    flex-direction: column;
  }
  
  .form-actions button {
    width: 100%;
  }
}

/* === Animations === */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideInUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

.subscription-card {
  animation: slideInUp 0.3s ease;
}

/* === Utility Classes === */
.hidden {
  display: none !important;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-success {
  color: var(--success-color);
}

.text-warning {
  color: var(--warning-color);
}

.text-danger {
  color: var(--danger-color);
}

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

.mt-1 {
  margin-top: 0.5rem;
}

.mt-2 {
  margin-top: 1rem;
}

.mb-1 {
  margin-bottom: 0.5rem;
}

.mb-2 {
  margin-bottom: 1rem;
}