:root {
  /* Dark Theme Colors */
  --color-background: #1a1a1a;
  --color-surface: #2d2d2d;
  --color-text: #ffffff;
  --color-text-secondary: #b0b0b0;
  --color-primary: #007acc;
  --color-primary-hover: #005a9e;
  --color-primary-active: #004578;
  --color-secondary: rgba(255, 255, 255, 0.1);
  --color-secondary-hover: rgba(255, 255, 255, 0.15);
  --color-secondary-active: rgba(255, 255, 255, 0.2);
  --color-border: #404040;
  --color-btn-primary-text: #ffffff;
  --color-card-border: #404040;
  --color-card-border-inner: #404040;
  --color-error: #ff4444;
  --color-success: #00aa44;
  --color-warning: #ffaa00;
  --color-info: #00aaff;
  --color-focus-ring: rgba(0, 122, 204, 0.4);
  --color-select-caret: rgba(255, 255, 255, 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --select-caret-dark: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23f5f5f5' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");

  /* RGB versions for opacity control */
  --color-success-rgb: 33, 128, 141;
  --color-error-rgb: 192, 21, 47;
  --color-warning-rgb: 168, 75, 47;
  --color-info-rgb: 98, 108, 113;

  /* Typography */
  --font-family-base: "FKGroteskNeue", "Geist", "Inter", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "Berkeley Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 24px;
  --font-size-4xl: 30px;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 550;
  --font-weight-bold: 600;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --letter-spacing-tight: -0.01em;

  /* Spacing */
  --space-0: 0;
  --space-1: 1px;
  --space-2: 2px;
  --space-4: 4px;
  --space-6: 6px;
  --space-8: 8px;
  --space-10: 10px;
  --space-12: 12px;
  --space-16: 16px;
  --space-20: 20px;
  --space-24: 24px;
  --space-32: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-base: 8px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.02);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.04),
    0 2px 4px -1px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.04),
    0 4px 6px -2px rgba(0, 0, 0, 0.02);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.03);

  /* Animation */
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --ease-standard: cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
}

/* Remove auto dark mode - we're using fixed dark theme */

/* Remove theme switching - using fixed dark theme */

/* Base styles */
html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
}

*,
*::before,
*::after {
  box-sizing: inherit;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
}

h1 {
  font-size: var(--font-size-4xl);
}
h2 {
  font-size: var(--font-size-3xl);
}
h3 {
  font-size: var(--font-size-2xl);
}
h4 {
  font-size: var(--font-size-xl);
}
h5 {
  font-size: var(--font-size-lg);
}
h6 {
  font-size: var(--font-size-md);
}

p {
  margin: 0 0 var(--space-16) 0;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-standard);
}

a:hover {
  color: var(--color-primary-hover);
}

code,
pre {
  font-family: var(--font-family-mono);
  font-size: calc(var(--font-size-base) * 0.95);
  background-color: var(--color-secondary);
  border-radius: var(--radius-sm);
}

code {
  padding: var(--space-1) var(--space-4);
}

pre {
  padding: var(--space-16);
  margin: var(--space-16) 0;
  overflow: auto;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  font-size: var(--font-size-base);
  font-weight: 500;
  line-height: 1.5;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

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

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

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

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

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

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

.btn--outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

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

.btn--sm {
  padding: var(--space-4) var(--space-12);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

.btn--lg {
  padding: var(--space-10) var(--space-20);
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
}

.btn--full-width {
  width: 100%;
}

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

/* Form elements */
.form-control {
  display: block;
  width: 100%;
  padding: var(--space-8) var(--space-12);
  font-size: var(--font-size-md);
  line-height: 1.5;
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  transition: border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

textarea.form-control {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
}

select.form-control {
  padding: var(--space-8) var(--space-12);
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: var(--select-caret-light);
  background-repeat: no-repeat;
  background-position: right var(--space-12) center;
  background-size: 16px;
  padding-right: var(--space-32);
}

/* Add a dark mode specific caret */
@media (prefers-color-scheme: dark) {
  select.form-control {
    background-image: var(--select-caret-dark);
  }
}

/* Also handle data-color-scheme */
[data-color-scheme="dark"] select.form-control {
  background-image: var(--select-caret-dark);
}

[data-color-scheme="light"] select.form-control {
  background-image: var(--select-caret-light);
}

.form-control:focus {
  border-color: var(--color-primary);
  outline: var(--focus-outline);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.form-group {
  margin-bottom: var(--space-16);
}

/* Card component */
.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-card-border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow var(--duration-normal) var(--ease-standard);
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.card__body {
  padding: var(--space-16);
}

.card__header,
.card__footer {
  padding: var(--space-16);
  border-bottom: 1px solid var(--color-card-border-inner);
}

/* Status indicators - simplified with CSS variables */
.status {
  display: inline-flex;
  align-items: center;
  padding: var(--space-6) var(--space-12);
  border-radius: var(--radius-full);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-sm);
}

.status--success {
  background-color: rgba(
    var(--color-success-rgb, 33, 128, 141),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 33, 128, 141), var(--status-border-opacity));
}

.status--error {
  background-color: rgba(
    var(--color-error-rgb, 192, 21, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-error);
  border: 1px solid
    rgba(var(--color-error-rgb, 192, 21, 47), var(--status-border-opacity));
}

.status--warning {
  background-color: rgba(
    var(--color-warning-rgb, 168, 75, 47),
    var(--status-bg-opacity)
  );
  color: var(--color-warning);
  border: 1px solid
    rgba(var(--color-warning-rgb, 168, 75, 47), var(--status-border-opacity));
}

.status--info {
  background-color: rgba(
    var(--color-info-rgb, 98, 108, 113),
    var(--status-bg-opacity)
  );
  color: var(--color-info);
  border: 1px solid
    rgba(var(--color-info-rgb, 98, 108, 113), var(--status-border-opacity));
}

/* Container layout */
.container {
  width: 100%;
  margin-right: auto;
  margin-left: auto;
  padding-right: var(--space-16);
  padding-left: var(--space-16);
}

@media (min-width: 640px) {
  .container {
    max-width: var(--container-sm);
  }
}
@media (min-width: 768px) {
  .container {
    max-width: var(--container-md);
  }
}
@media (min-width: 1024px) {
  .container {
    max-width: var(--container-lg);
  }
}
@media (min-width: 1280px) {
  .container {
    max-width: var(--container-xl);
  }
}

/* Utility classes */
.flex {
  display: flex;
}
.flex-col {
  flex-direction: column;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.justify-between {
  justify-content: space-between;
}
.gap-4 {
  gap: var(--space-4);
}
.gap-8 {
  gap: var(--space-8);
}
.gap-16 {
  gap: var(--space-16);
}

.m-0 {
  margin: 0;
}
.mt-8 {
  margin-top: var(--space-8);
}
.mb-8 {
  margin-bottom: var(--space-8);
}
.mx-8 {
  margin-left: var(--space-8);
  margin-right: var(--space-8);
}
.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.p-0 {
  padding: 0;
}
.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}
.px-8 {
  padding-left: var(--space-8);
  padding-right: var(--space-8);
}
.py-16 {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
.px-16 {
  padding-left: var(--space-16);
  padding-right: var(--space-16);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

/* Accessibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

:focus-visible {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Dark mode specifics */
[data-color-scheme="dark"] .btn--outline {
  border: 1px solid var(--color-border-secondary);
}

@font-face {
  font-family: 'FKGroteskNeue';
  src: url('https://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* Custom styles building upon the design system */

/* Main layout */
body {
  min-height: 100vh;
  padding: var(--space-20);
  margin: 0;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0;
  width: 100%;
}

.header {
  margin-bottom: var(--space-24);
}

.header h1 {
  color: var(--color-text);
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-8);
  font-weight: var(--font-weight-semibold);
}

.header__description {
  color: var(--color-text-secondary);
  font-size: var(--font-size-base);
}

.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-24);
}

.data-processor {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-20);
  width: 100%;
}

@media (min-width: 768px) {
  .data-processor {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-24);
    align-items: start;
  }

  /* Ensure equal heights on desktop */
  .input-section,
  .output-section {
    min-height: 600px;
  }

  /* Desktop textarea heights - compensate for file upload area */
  #input-data {
    min-height: 280px;
    height: 280px;
  }

  #output-data {
    min-height: 420px;
    height: 420px;
  }
}

/* Mobile specific adjustments */
@media (max-width: 767px) {
  .data-processor {
    gap: var(--space-16);
  }

  .input-section,
  .output-section {
    margin-bottom: var(--space-16);
  }

  /* Mobile - equal heights since no side-by-side comparison */
  #input-data,
  #output-data {
    min-height: 300px;
    height: 300px;
  }
}

/* Section styling */
.input-section,
.output-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  border: 1px solid var(--color-border);
  width: 100%;
  min-width: 0; /* Prevents grid items from overflowing */
  display: flex;
  flex-direction: column;
}

/* Desktop: Make sections equal height */
@media (min-width: 768px) {
  .input-section,
  .output-section {
    height: 600px;
  }
}

.form-label {
  color: var(--color-text);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-16);
  display: block;
  flex-shrink: 0;
}

/* Form elements styling */
.data-textarea {
  font-family: var(--font-family-mono);
  resize: vertical;
  background-color: #1e1e1e;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.4;
  width: 100%;
  box-sizing: border-box;
  flex: 1;
}

.data-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(0, 122, 204, 0.2);
}

/* Input textarea - smaller due to file upload area */
#input-data {
  min-height: 280px;
  height: 280px;
}

/* Output textarea - larger to compensate for missing file upload area */
#output-data {
  min-height: 420px;
  height: 420px;
}

.controls,
.output-controls {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-12);
  margin-top: var(--space-16);
  flex-shrink: 0;
}

.controls .btn,
.output-controls .btn {
  margin-bottom: 0;
  flex: 0 0 auto;
}

/* Ensure form groups take full available space */
.form-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

/* Special handling for output section to maximize textarea */
.output-section .form-group {
  flex: 1;
}

.output-section .data-textarea {
  flex: 1;
  min-height: 420px;
}

/* Statistics section */
.statistics {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  border: 1px solid var(--color-border);
  margin-top: var(--space-24);
}

.statistics h3 {
  color: var(--color-text);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-16);
  font-weight: var(--font-weight-medium);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-16);
}

@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
  text-align: center;
}

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* Notification */
.notification {
  position: fixed;
  bottom: var(--space-24);
  left: 50%;
  transform: translateX(-50%);
  padding: var(--space-12) var(--space-20);
  background-color: var(--color-success);
  color: white;
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  transition: opacity 0.3s ease-in-out;
  max-width: 90%;
  text-align: center;
}

/* Animation for processing */
@keyframes pulse {
  0% { opacity: 1; }
  50% { opacity: 0.6; }
  100% { opacity: 1; }
}

.processing {
  animation: pulse 1.5s infinite;
  pointer-events: none;
}

/* Button styles override for dark theme */
.btn--primary {
  background-color: var(--color-primary);
  color: var(--color-btn-primary-text);
  border: none;
  font-weight: var(--font-weight-medium);
}

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

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

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

.btn--outline {
  background-color: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
}

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

/* Custom scrollbar for textareas */
.data-textarea::-webkit-scrollbar {
  width: 8px;
}

.data-textarea::-webkit-scrollbar-track {
  background: var(--color-secondary);
  border-radius: 4px;
}

.data-textarea::-webkit-scrollbar-thumb {
  background-color: #1976d2;
  border-radius: 4px;
}

.data-textarea::-webkit-scrollbar-thumb:hover {
  background-color: #1565c0;
}

/* Error state */
.error {
  border-color: var(--color-error) !important;
}

.error-message {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--space-4);
}

/* File Upload Area */
.file-upload-area {
  border: 2px dashed #555;
  border-radius: var(--radius-base);
  padding: var(--space-16);
  text-align: center;
  background-color: #1e1e1e;
  transition: all var(--duration-normal) var(--ease-standard);
  cursor: pointer;
  margin-bottom: var(--space-16);
  position: relative;
  flex-shrink: 0;
  width: 100%;
  box-sizing: border-box;
  height: 120px; /* Fixed height to maintain consistency */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.file-upload-area:hover {
  border-color: var(--color-primary);
  background-color: rgba(0, 122, 204, 0.1);
}

.file-upload-area.dragover {
  border-color: var(--color-primary);
  background-color: rgba(0, 122, 204, 0.1);
  transform: scale(1.01);
}

.file-upload-content {
  pointer-events: none;
}

.file-upload-icon {
  font-size: 2rem;
  margin-bottom: var(--space-8);
  opacity: 0.8;
}

.file-upload-text {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

.file-upload-link {
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.file-upload-area.processing {
  border-color: var(--color-success);
  background-color: rgba(0, 170, 68, 0.1);
}

.file-upload-area.processing .file-upload-icon {
  animation: pulse 1.5s infinite;
}

/* File upload success state */
.file-upload-success {
  border-color: var(--color-success);
  background-color: rgba(0, 170, 68, 0.1);
}

.file-upload-success .file-upload-text {
  color: var(--color-success);
  font-weight: var(--font-weight-medium);
}