/* ===================================
   Mobile-First Design System
   Clean White/Green with Bottom Navigation
   =================================== */

/* Import Modern Font */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* CSS Variables - Color Palette */
:root {
  /* Primary Colors */
  --primary-green: #10b981;
  --primary-green-hover: #059669;
  --primary-green-light: #d1fae5;

  /* Background Colors */
  --bg-white: #ffffff;
  --bg-gray-50: #f9fafb;
  --bg-gray-100: #f3f4f6;

  /* Text Colors */
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-tertiary: #9ca3af;

  /* Border Colors */
  --border-light: #e5e7eb;
  --border-medium: #d1d5db;

  /* Status Colors */
  --danger-red: #ef4444;
  --danger-red-hover: #dc2626;
  --danger-light: #fee2e2;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Bottom Nav Height */
  --bottom-nav-height: 64px;
}

/* ===================================
   Base Styles
   =================================== */

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-gray-50);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
}

/* ===================================
   Layout
   =================================== */

.app-container {
  max-width: 100%;
  min-height: 100vh;
  padding-bottom: var(--bottom-nav-height);
}

/* ===================================
   Typography
   =================================== */

header {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 50;
}

h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  letter-spacing: -0.025em;
}

h1 svg {
  width: 28px;
  height: 28px;
  color: var(--primary-green);
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

h2 svg {
  width: 24px;
  height: 24px;
  color: var(--primary-green);
}

h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* ===================================
   Page System
   =================================== */

.page {
  display: none;
  padding: var(--spacing-md);
  animation: fadeIn 0.3s ease;
}

.page.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===================================
   Bottom Navigation
   =================================== */

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--bottom-nav-height);
  background: var(--bg-white);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  border: none;
  background: none;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  padding: var(--spacing-sm);
  min-height: 44px;
  font-size: 0.75rem;
  font-weight: 500;
}

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

.nav-item.active {
  color: var(--primary-green);
}

.nav-item svg {
  width: 24px;
  height: 24px;
  stroke-width: 2;
}

/* ===================================
   Cards
   =================================== */

.glass-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--spacing-md);
}

/* ===================================
   Form Elements
   =================================== */

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

label {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

label svg {
  width: 16px;
  height: 16px;
  color: var(--text-secondary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="datetime-local"],
textarea,
select {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-white);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  outline: none;
  -webkit-appearance: none;
  appearance: none;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="datetime-local"]:focus,
textarea:focus,
select:focus {
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px var(--primary-green-light);
  background: var(--bg-white);
}

input[type="text"]::placeholder,
input[type="email"]::placeholder,
input[type="password"]::placeholder,
textarea::placeholder {
  color: var(--text-tertiary);
}

textarea {
  min-height: 100px;
  resize: vertical;
}

/* ===================================
   Trash Type Buttons
   =================================== */

.trash-types {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.trash-type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  min-height: 80px;
}

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

.trash-type-btn:hover {
  border-color: var(--primary-green);
  background: var(--bg-gray-50);
}

.trash-type-btn.active {
  border-color: var(--primary-green);
  background: var(--primary-green-light);
  color: var(--primary-green);
}

.trash-type-btn svg {
  width: 32px;
  height: 32px;
}

/* ===================================
   Buttons
   =================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  outline: none;
  text-decoration: none;
  min-height: 44px;
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn:active:not(:disabled) {
  transform: scale(0.95);
}

.btn svg {
  width: 20px;
  height: 20px;
}

.btn-primary {
  background: var(--primary-green);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--primary-green-hover);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-gray-50);
  border-color: var(--border-medium);
}

.btn-danger {
  background: var(--danger-red);
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-danger:hover:not(:disabled) {
  background: var(--danger-red-hover);
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  min-height: 36px;
}

/* ===================================
   Statistics
   =================================== */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.stat-card {
  background: var(--bg-gray-50);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  text-align: center;
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-green);
  margin-bottom: var(--spacing-xs);
}

.stat-value-with-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  font-size: 1rem !important;
}

.stat-value-with-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary-green);
}

.stat-value-with-icon span {
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ===================================
   Chart
   =================================== */

.chart-container {
  margin: var(--spacing-lg) 0;
}

.chart-bar {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.chart-label {
  min-width: 120px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.chart-label svg {
  width: 18px;
  height: 18px;
  color: var(--text-secondary);
}

.chart-bar-bg {
  flex: 1;
  height: 32px;
  background: var(--bg-gray-100);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.chart-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--primary-green), var(--primary-green-hover));
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: var(--spacing-sm);
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  transition: width var(--transition-slow);
  min-width: 32px;
}

/* ===================================
   Records List
   =================================== */

.filters {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.filter-group {
  flex: 1;
  min-width: 140px;
}

.filter-group select {
  width: 100%;
}

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

.record-item {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: all var(--transition-base);
}

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

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

.record-type {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  font-size: 1rem;
  color: var(--text-primary);
}

.record-type svg {
  width: 20px;
  height: 20px;
  color: var(--primary-green);
}

.record-time {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.record-location {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.record-location svg {
  width: 16px;
  height: 16px;
}

.record-user {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.record-user svg {
  width: 16px;
  height: 16px;
  color: var(--primary-green);
}

.record-notes {
  padding: var(--spacing-md);
  background: var(--bg-gray-50);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  border-left: 3px solid var(--primary-green);
}

.record-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: var(--spacing-md);
}

/* ===================================
   Empty State
   =================================== */

.empty-state {
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
}

.empty-state-icon {
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
  display: flex;
  justify-content: center;
}

.empty-state-icon svg {
  width: 64px;
  height: 64px;
  color: var(--text-tertiary);
}

.empty-state-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===================================
   Modal
   =================================== */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--spacing-md);
}

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

.modal-dialog {
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 400px;
  width: 100%;
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.modal-overlay.active .modal-dialog {
  transform: scale(1);
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}

.modal-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-message {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

.modal-footer {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--border-light);
  display: flex;
  gap: var(--spacing-md);
}

.modal-footer .btn {
  flex: 1;
}

/* ===================================
   Utility Classes
   =================================== */

.flex {
  display: flex;
}

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

.gap-sm {
  gap: var(--spacing-sm);
}

.gap-md {
  gap: var(--spacing-md);
}

.gap-lg {
  gap: var(--spacing-lg);
}

.mb-sm {
  margin-bottom: var(--spacing-sm);
}

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

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

.mb-xl {
  margin-bottom: var(--spacing-xl);
}

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

#page-map {
  padding-bottom: var(--spacing-md);
}

#page-map .glass-card {
  margin-bottom: var(--spacing-xl);
}

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

/* ===================================
   Pie Chart
   =================================== */

.chart-pie-container {
  max-width: 300px;
  margin: 0 auto;
  padding: var(--spacing-md);
}

/* ===================================
   Custom Date Picker
   =================================== */

.custom-date-picker {
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-md);
  background: var(--bg-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

/* ===================================
   Map
   =================================== */

.map-container {
  height: 400px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-light);
  margin-bottom: var(--spacing-md);
}

.map-filters {
  display: flex;
  gap: var(--spacing-md);
}

.map-filters select {
  flex: 1;
}

.map-legend {
  padding: var(--spacing-md);
  background: var(--bg-gray-50);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
}

.legend-title {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.legend-items {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.legend-icon {
  width: 16px;
  height: 16px;
  color: var(--primary-green);
}

/* ===================================
   Account Page
   =================================== */

.user-info-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-gray-50);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.user-avatar {
  flex-shrink: 0;
}

.user-avatar svg {
  width: 64px;
  height: 64px;
  color: var(--primary-green);
}

.user-details {
  flex: 1;
}

.user-name {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
}

.user-email {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.auth-notice {
  padding: var(--spacing-md);
  background: var(--primary-green-light);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary-green);
}

.auth-notice p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.auth-notice p:last-child {
  margin-bottom: 0;
}

.auth-notice svg {
  width: 16px;
  height: 16px;
  color: var(--primary-green);
}

.auth-divider {
  display: flex;
  align-items: center;
  text-align: center;
  margin: var(--spacing-lg) 0;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  border-bottom: 1px solid var(--border-light);
}

.auth-divider span {
  padding: 0 var(--spacing-md);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

.form-hint {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.user-verified {
  font-size: 0.75rem;
  margin-top: var(--spacing-xs);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.user-verified.verified {
  color: var(--primary-green);
}

.user-verified.unverified {
  color: var(--text-tertiary);
}

.user-verified svg {
  width: 14px;
  height: 14px;
}

/* ===================================
   Responsive Design (Tablet+)
   =================================== */

@media (min-width: 768px) {
  .app-container {
    max-width: 768px;
    margin: 0 auto;
  }

  .trash-types {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .flex.gap-md {
    flex-direction: row;
  }

  .btn {
    width: auto;
  }

  .map-container {
    height: 500px;
  }

  .legend-items {
    grid-template-columns: repeat(3, 1fr);
  }
}