/* Material Design 3 Color System */
:root {
  /* Primary Colors */
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;

  /* Secondary Colors */
  --md-sys-color-secondary: #625B71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #E8DEF8;
  --md-sys-color-on-secondary-container: #1D192B;

  /* Tertiary Colors */
  --md-sys-color-tertiary: #7D5260;
  --md-sys-color-on-tertiary: #FFFFFF;
  --md-sys-color-tertiary-container: #FFD8E4;
  --md-sys-color-on-tertiary-container: #31111D;

  /* Error Colors */
  --md-sys-color-error: #BA1A1A;
  --md-sys-color-on-error: #FFFFFF;
  --md-sys-color-error-container: #FFDAD6;
  --md-sys-color-on-error-container: #410002;

  /* Surface Colors */
  --md-sys-color-surface: #FEF7FF;
  --md-sys-color-on-surface: #1C1B1F;
  --md-sys-color-surface-variant: #E7E0EC;
  --md-sys-color-on-surface-variant: #49454F;
  --md-sys-color-surface-container: #F3EDF7;
  --md-sys-color-surface-container-high: #ECE6F0;
  --md-sys-color-surface-container-highest: #E6E0E9;

  /* Outline Colors */
  --md-sys-color-outline: #79747E;
  --md-sys-color-outline-variant: #CAC4D0;

  /* Success Colors (Custom) */
  --md-sys-color-success: #4CAF50;
  --md-sys-color-on-success: #FFFFFF;
  --md-sys-color-success-container: #E8F5E8;

  /* Warning Colors (Custom) */
  --md-sys-color-warning: #FF9800;
  --md-sys-color-on-warning: #FFFFFF;
  --md-sys-color-warning-container: #FFF3E0;

  /* Typography Scale */
  --md-sys-typescale-display-large: 400 57px/64px 'Roboto', sans-serif;
  --md-sys-typescale-headline-large: 400 32px/40px 'Roboto', sans-serif;
  --md-sys-typescale-headline-medium: 400 28px/36px 'Roboto', sans-serif;
  --md-sys-typescale-title-large: 400 22px/28px 'Roboto', sans-serif;
  --md-sys-typescale-title-medium: 500 16px/24px 'Roboto', sans-serif;
  --md-sys-typescale-title-small: 500 14px/20px 'Roboto', sans-serif;
  --md-sys-typescale-body-large: 400 16px/24px 'Roboto', sans-serif;
  --md-sys-typescale-body-medium: 400 14px/20px 'Roboto', sans-serif;
  --md-sys-typescale-body-small: 400 12px/16px 'Roboto', sans-serif;
  --md-sys-typescale-label-large: 500 14px/20px 'Roboto', sans-serif;
  --md-sys-typescale-label-medium: 500 12px/16px 'Roboto', sans-serif;
  --md-sys-typescale-label-small: 500 11px/16px 'Roboto', sans-serif;

  /* Shape */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
}

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

body {
  font: var(--md-sys-typescale-body-medium);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* App Bar */
.app-bar {
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  padding: var(--spacing-md) var(--spacing-lg);
  position: sticky;
  top: 0;
  z-index: 100;
}

.app-bar-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 100%;
}

.app-title {
  font: var(--md-sys-typescale-headline-medium);
  color: var(--md-sys-color-primary);
  margin: 0;
}

.version-chip {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: var(--spacing-xs);
}

.version-text {
  font: var(--md-sys-typescale-label-large);
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--md-sys-shape-corner-medium);
}

.update-date {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* Main Content */
.main-content {
  flex: 1;
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
}

/* Control Section */
.control-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Display Section */
.display-section {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Section Cards */
.section-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  padding: var(--spacing-lg);
  border: 1px solid var(--md-sys-color-outline-variant);
}

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

.card-header .material-symbols-outlined {
  color: var(--md-sys-color-primary);
  font-size: 24px;
}

.card-header h2,
.card-header h3 {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  margin: 0;
}

/* Input Fields */
.input-field {
  margin-bottom: var(--spacing-md);
}

.text-field,
.select-field {
  position: relative;
  display: flex;
  align-items: center;
}

.text-field input,
.select-field select {
  width: 100%;
  padding: var(--spacing-md);
  padding-right: 40px;
  font: var(--md-sys-typescale-body-large);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  transition: all 0.2s ease;
}

.text-field input:focus,
.select-field select:focus {
  outline: none;
  border-color: var(--md-sys-color-primary);
  border-width: 2px;
}

.text-field .material-symbols-outlined,
.select-field .material-symbols-outlined {
  position: absolute;
  right: var(--spacing-sm);
  color: var(--md-sys-color-on-surface-variant);
  pointer-events: none;
  font-size: 20px;
}

/* Analysis Grid */
.analysis-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.analysis-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-md);
  border: none;
  border-radius: var(--md-sys-shape-corner-medium);
  font: var(--md-sys-typescale-label-large);
  cursor: pointer;
  transition: all 0.2s ease;
  min-height: 80px;
}

.analysis-btn .material-symbols-outlined {
  font-size: 24px;
}

.analysis-btn.primary {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.analysis-btn.primary:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 90%, black);
}

.analysis-btn.secondary {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.analysis-btn.secondary:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-secondary-container) 90%, black);
}

.analysis-btn.tertiary {
  background-color: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

.analysis-btn.tertiary:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-tertiary-container) 90%, black);
}

/* Export Grid */
.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
}

.export-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--md-sys-color-success-container);
  color: var(--md-sys-color-success);
  border: 1px solid var(--md-sys-color-success);
  border-radius: var(--md-sys-shape-corner-small);
  font: var(--md-sys-typescale-label-medium);
  cursor: pointer;
  transition: all 0.2s ease;
}

.export-btn:hover {
  background-color: var(--md-sys-color-success);
  color: var(--md-sys-color-on-success);
}

/* Loading */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--md-sys-color-outline-variant);
  border-top: 3px solid var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.loading-text {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

/* Chart Area */
.chart-container {
  min-height: 500px;
}

.chart-area {
  width: 100%;
  height: 100%;
  min-height: 450px;
  border-radius: var(--md-sys-shape-corner-medium);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 450px;
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
}

.empty-state .material-symbols-outlined {
  font-size: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.6;
}

.empty-state h3 {
  font: var(--md-sys-typescale-title-medium);
  margin-bottom: var(--spacing-sm);
}

.empty-state p {
  font: var(--md-sys-typescale-body-medium);
  opacity: 0.8;
}

/* Statistics */
.stats-container {
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-large);
  padding: var(--spacing-lg);
  border: 1px solid var(--md-sys-color-outline-variant);
}

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

.stats-header .material-symbols-outlined {
  color: var(--md-sys-color-primary);
  font-size: 24px;
}

.stats-header h3 {
  font: var(--md-sys-typescale-title-medium);
  color: var(--md-sys-color-on-surface);
  margin: 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--md-sys-color-surface);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  cursor: pointer;
  transition: all 0.2s ease;
}

.stat-card:hover {
  background-color: var(--md-sys-color-surface-container-high);
  transform: translateY(-2px);
}

.stat-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--md-sys-shape-corner-medium);
  background-color: var(--md-sys-color-primary-container);
}

.stat-icon .material-symbols-outlined {
  font-size: 24px;
  color: var(--md-sys-color-primary);
}

.stat-icon.low {
  background-color: var(--md-sys-color-success-container);
}

.stat-icon.low .material-symbols-outlined {
  color: var(--md-sys-color-success);
}

.stat-icon.high {
  background-color: var(--md-sys-color-error-container);
}

.stat-icon.high .material-symbols-outlined {
  color: var(--md-sys-color-error);
}

.stat-content {
  flex: 1;
}

.stat-label {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: var(--spacing-xs);
}

.stat-value {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  font-weight: 500;
  margin-bottom: var(--spacing-xs);
}

.stat-unit {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
}

/* Data Table */
.table-container {
  overflow: hidden;
}

.table-wrapper {
  overflow-x: auto;
  border-radius: var(--md-sys-shape-corner-small);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--md-sys-color-surface);
}

.data-table th {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  font: var(--md-sys-typescale-title-small);
  padding: var(--spacing-md);
  text-align: left;
  border-bottom: 2px solid var(--md-sys-color-outline-variant);
}

.data-table td {
  padding: var(--spacing-md);
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.data-table tr:hover {
  background-color: var(--md-sys-color-surface-container);
}

.empty-row td {
  text-align: center;
  color: var(--md-sys-color-on-surface-variant);
  padding: var(--spacing-xl);
}

/* Result Container */
.result-container .result-content {
  padding: var(--spacing-md);
  background-color: var(--md-sys-color-surface);
  border-radius: var(--md-sys-shape-corner-medium);
  border: 1px solid var(--md-sys-color-outline-variant);
}

/* Footer */
.app-footer {
  background-color: var(--md-sys-color-surface-container);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding: var(--spacing-lg);
  margin-top: auto;
}

.footer-content {
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

.footer-content p {
  font: var(--md-sys-typescale-body-small);
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: var(--spacing-xs);
}

.footer-content p:last-child {
  margin-bottom: 0;
}

/* FAB */
.fab {
  position: fixed;
  bottom: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 56px;
  height: 56px;
  border-radius: var(--md-sys-shape-corner-large);
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  transition: all 0.2s ease;
  z-index: 50;
}

.fab:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.fab .material-symbols-outlined {
  font-size: 24px;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .main-content {
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  }
}

@media (max-width: 768px) {
  .app-bar {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .app-title {
    font: var(--md-sys-typescale-title-large);
  }

  .main-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
  }

  .control-section {
    order: 1;
  }

  .display-section {
    order: 2;
  }

  .analysis-grid {
    grid-template-columns: 1fr;
  }

  .analysis-btn {
    padding: var(--spacing-lg);
    min-height: 60px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
  }

  .stat-card {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-sm);
  }

  .stat-icon {
    margin-bottom: var(--spacing-xs);
  }

  .export-grid {
    grid-template-columns: 1fr;
  }

  .fab {
    bottom: var(--spacing-md);
    right: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .app-bar-content {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .version-chip {
    flex-direction: row;
    align-items: center;
    gap: var(--spacing-sm);
  }

  .section-card {
    padding: var(--spacing-md);
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .data-table th,
  .data-table td {
    padding: var(--spacing-sm);
    font-size: 14px;
  }
}

/* Print Styles */
@media print {
  .app-bar,
  .fab,
  .control-section {
    display: none;
  }

  .main-content {
    grid-template-columns: 1fr;
  }

  .section-card {
    border: 1px solid #ccc;
    break-inside: avoid;
  }
}

/* Notification Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-content {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--md-sys-shape-corner-large);
  padding: 0;
  max-width: 500px;
  width: 90%;
  max-height: 90vh;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  animation: slideUp 0.3s ease;
  display: flex;
  flex-direction: column;
}

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

.modal-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.modal-header .material-symbols-outlined {
  font-size: 32px;
  color: var(--md-sys-color-primary);
}

.modal-header h3 {
  font: var(--md-sys-typescale-title-large);
  color: var(--md-sys-color-on-surface);
  margin: 0;
}

.modal-body {
  padding: var(--spacing-lg);
  flex: 1;
  overflow-y: auto;
}

.modal-body p {
  font: var(--md-sys-typescale-body-large);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  margin: 0 0 var(--spacing-md) 0;
  white-space: pre-line;
}

.notification-time {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-small);
}

.notification-time .material-symbols-outlined {
  font-size: 20px;
  color: var(--md-sys-color-primary);
}

.notification-time span:last-child {
  font: var(--md-sys-typescale-body-medium);
  color: var(--md-sys-color-on-surface-variant);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  justify-content: flex-end;
}

.btn-primary {
  padding: var(--spacing-md) var(--spacing-lg);
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  border-radius: var(--md-sys-shape-corner-large);
  font: var(--md-sys-typescale-label-large);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary:hover {
  background-color: color-mix(in srgb, var(--md-sys-color-primary) 90%, black);
}

.btn-primary:active {
  transform: scale(0.98);
}

/* Dark Mode Support (if needed in future) */
@media (prefers-color-scheme: dark) {
  /* Dark mode variables can be added here */
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  :root {
    --md-sys-color-outline: #000000;
    --md-sys-color-outline-variant: #666666;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}