:root {
  /* Glassmorphism UI Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  
  /* Gradient Background Colors */
  --color-bg-start: #0f0f0f;
  --color-bg-end: #1a1a1a;
  --color-bg-overlay: rgba(255, 255, 255, 0.05);
  
  /* Glass Panel Properties */
  --glass-bg: rgba(255, 255, 255, 0.07);
  --glass-border: rgba(255, 255, 255, 0.15);
  --glass-shadow: rgba(0, 0, 0, 0.4);
  --glass-blur: 20px;
  
  /* Button Gradient */
  --btn-gradient-start: #00c6ff;
  --btn-gradient-end: #0072ff;
  --btn-glow: rgba(0, 114, 255, 0.5);
  
  /* Text Colors */
  --text-primary: #FFFFFF;
  --text-secondary: rgba(255, 255, 255, 0.7);
  
  /* Status Colors */
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);
  --color-success: #00c6ff;

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 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: "SF Pro Display", "Inter", "Manrope", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-family-mono: "SF Mono", ui-monospace, SFMono-Regular, Menlo,
    Monaco, Consolas, monospace;
  --font-size-xs: 11px;
  --font-size-sm: 12px;
  --font-size-base: 15px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  
  /* Spectrum Analyzer Colors */
  --spectrum-bg: #0c0c0c;
  --spectrum-grid: rgba(255, 165, 0, 0.3);
  --spectrum-line: #00e5ff;
  --spectrum-peak: #ff9500;
  --spectrum-text: #ffffff;
  --spectrum-header-bg: #111111;
  --spectrum-controls-bg: #1a1a1a;
  --font-size-3xl: 22px;
  --font-size-4xl: 28px;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --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: 12px;
  --radius-base: 16px;
  --radius-md: 20px;
  --radius-lg: 24px;
  --radius-pill: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-sm: 0 6px 16px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 12px var(--btn-glow);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.1);

  /* Animation */
  --duration-fast: 250ms;
  --duration-normal: 400ms;
  --ease-standard: cubic-bezier(0.4, 0.0, 0.2, 1);

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

/* Base styles for glassmorphism UI */
:root {
  /* We're using a dark theme by default for glassmorphism */
  --color-background: linear-gradient(135deg, var(--color-bg-start), var(--color-bg-end));
  --color-surface: var(--glass-bg);
  --color-text: var(--text-primary);
  --color-text-secondary: var(--text-secondary);
  --color-primary: var(--btn-gradient-end);
  --color-primary-hover: var(--btn-gradient-start);
  --color-primary-active: var(--btn-gradient-end);
  --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: var(--glass-border);
  --color-error: var(--color-red-400);
  --color-warning: var(--color-orange-400);
  --color-info: var(--text-secondary);
  --color-focus-ring: rgba(0, 198, 255, 0.4);
  --color-btn-primary-text: var(--text-primary);
  --color-card-border: var(--glass-border);
  --color-card-border-inner: rgba(255, 255, 255, 0.1);
  
  /* Common style patterns for glassmorphism */
  --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;
  --backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  --select-caret: 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='%23ffffff' 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");
    --color-success-rgb: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
/* Remove extra closing brace */
/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */
  
  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 0.15);
  --shadow-inset-sm: inset 0 1px 0 rgba(255, 255, 255, 0.1),
    inset 0 -1px 0 rgba(0, 0, 0, 0.15);
  --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 0.8);

  /* Common style patterns - updated for dark mode */
  --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 dark mode */
  --color-success-rgb: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

[data-color-scheme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  
  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* 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);
  -webkit-font-smoothing: antialiased;
  box-sizing: border-box;
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-background);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Add subtle radial gradient overlays for depth */
body::before,
body::after {
  content: '';
  position: absolute;
  width: 40vw;
  height: 40vw;
  border-radius: 50%;
  background: var(--color-bg-overlay);
  pointer-events: none;
  z-index: 0;
}

body::before {
  top: -10vw;
  right: -10vw;
}

body::after {
  bottom: -15vw;
  left: -15vw;
}

*,
*::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 with glassmorphism style */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-pill);
  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: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

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

.btn--primary:active {
  background: linear-gradient(135deg, var(--btn-gradient-end), var(--btn-gradient-start));
  transform: translateY(1px);
  box-shadow: var(--shadow-sm);
}

.btn--secondary {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn--secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
}

.btn--secondary:active {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(1px);
}

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

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.2);
}

.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;
  background: rgba(255, 255, 255, 0.2) !important;
  border-color: rgba(255, 255, 255, 0.1) !important;
  box-shadow: none !important;
  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 with glassmorphism effect */
.card {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: transform var(--duration-fast) var(--ease-standard),
              box-shadow var(--duration-fast) var(--ease-standard);
}

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

.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);
  position: relative;
  z-index: 1;
}

@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,
input[type="file"][hidden] {
  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');
}

/* END PERPLEXITY DESIGN SYSTEM */
/* Custom styles for High-Speed MFSK Image Converter */

.header {
  text-align: center;
  margin-bottom: var(--space-32);
  padding: var(--space-24) 0;
  position: relative;
}

.header-subtitle {
  color: var(--text-secondary);
  margin-top: var(--space-8);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-light);
}

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

/* Tab Navigation with glassmorphism */
.tab-nav {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-24);
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}

.tab-btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-20);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.tab-btn:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
}

.tab-btn.active {
  background: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end));
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

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

/* Tab Content */
.tab-content {
  display: none;
  flex-direction: column;
  gap: var(--space-24);
}

.tab-content.active {
  display: flex;
  animation: fadeIn var(--duration-fast) var(--ease-standard);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Preset Buttons */
.preset-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: var(--space-12);
}

.preset-btn {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-16);
  text-align: center;
}

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

.preset-desc {
  font-size: var(--font-size-xs);
  opacity: 0.8;
}

/* Input Method Buttons */
.input-method-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-12);
}

.method-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-20);
  text-align: center;
}

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

.method-btn svg {
  width: 24px;
  height: 24px;
}

/* File Upload Areas */
.file-upload-area {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-32);
  text-align: center;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  box-shadow: var(--shadow-sm);
  position: relative;
  z-index: 1;
  display: block; /* Ensure label behaves like a block element */
}

.file-upload-area:hover {
  border-image: linear-gradient(135deg, var(--btn-gradient-start), var(--btn-gradient-end)) 1;
  background: rgba(255, 255, 255, 0.1);
  box-shadow: var(--shadow-md);
}

.file-upload-area.dragover {
  border-color: var(--btn-gradient-start);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 15px rgba(0, 198, 255, 0.3);
  transform: scale(1.02);
}

.upload-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-12);
  pointer-events: all; /* Ensure all child elements receive pointer events */
  width: 100%; /* Ensure it takes full width of parent */
  height: 100%; /* Ensure it takes full height of parent */
}

.upload-icon {
  color: var(--text-secondary);
  width: 48px;
  height: 48px;
  stroke-width: 1.5;
  pointer-events: all; /* Ensure icon is clickable */
}

.upload-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  margin: 0;
  pointer-events: all; /* Ensure text is clickable */
}

.upload-subtext {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
  pointer-events: all; /* Ensure text is clickable */
}

/* File Info */
.file-info {
  margin-top: var(--space-20);
  padding: var(--space-16);
  background: var(--color-bg-4);
  border-radius: var(--radius-base);
  display: flex;
  gap: var(--space-16);
  align-items: center;
}

.file-preview {
  flex-shrink: 0;
}

.file-preview img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
}

.file-details p {
  margin: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

/* Encode Info Grid */
.encode-info {
  background: var(--color-bg-5);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  margin-bottom: var(--space-20);
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: var(--space-12);
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.info-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

.info-value {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* Progress Styles */
.progress-section {
  margin-top: var(--space-20);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-8);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.2);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--btn-gradient-start), var(--btn-gradient-end));
  border-radius: var(--radius-full);
  transition: width var(--duration-normal) var(--ease-standard);
  width: 0%;
  box-shadow: 0 0 10px rgba(0, 198, 255, 0.5);
}

.progress-text {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  margin: 0;
}

/* Audio Controls with glassmorphism */
.audio-controls {
  text-align: center;
  margin-bottom: var(--space-20);
}

.audio-player {
  width: 100%;
  max-width: 500px;
  height: 50px;
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border-radius: var(--radius-base);
  border: 1px solid var(--glass-border);
}

/* Custom audio player styling */
audio::-webkit-media-controls-panel {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
}

audio::-webkit-media-controls-play-button,
audio::-webkit-media-controls-mute-button {
  filter: invert(1) brightness(1.8);
}

.audio-stats {
  background: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  border: 1px solid var(--glass-border);
  margin-bottom: var(--space-20);
  box-shadow: var(--shadow-sm);
}

.audio-stats p {
  margin: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

/* Microphone Controls */
.mic-controls {
  display: flex;
  justify-content: center;
  gap: var(--space-12);
  margin-bottom: var(--space-24);
}

.mic-controls .btn {
  min-width: 150px;
}

/* Visualizer */
.visualizer-section {
  margin-top: var(--space-20);
}

.visualizer-section h3 {
  margin-bottom: var(--space-16);
  font-size: var(--font-size-lg);
}

#spectrumCanvas {
  width: 100%;
  max-width: 600px;
  height: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  display: block;
  margin: 0 auto var(--space-16) auto;
}

/* Signal Strength Indicator */
.signal-info {
  background: var(--color-bg-7);
  padding: var(--space-16);
  border-radius: var(--radius-base);
}

.signal-strength {
  display: flex;
  align-items: center;
  gap: var(--space-12);
}

.signal-label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  min-width: 120px;
}

.signal-bar {
  flex: 1;
  height: 8px;
  background: var(--color-secondary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.signal-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-success), var(--color-warning), var(--color-error));
  border-radius: var(--radius-full);
  transition: width var(--duration-fast) var(--ease-standard);
  width: 0%;
}

/* Microphone Device Selector */
.mic-device-selector {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin-bottom: var(--space-16);
  flex-wrap: wrap;
}

.mic-device-selector label {
  font-weight: var(--font-weight-medium);
  min-width: 90px;
  font-size: var(--font-size-sm);
}

.mic-device-selector select {
  flex: 1;
  min-width: 200px;
  padding: var(--space-8) var(--space-12);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
  background-color: var(--glass-bg);
  color: var(--color-text);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
}

.btn--small {
  padding: var(--space-4) var(--space-8);
  font-size: var(--font-size-sm);
  border-radius: var(--radius-sm);
}

/* Microphone status indicators */
.mic-status {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  margin-top: var(--space-8);
  font-size: var(--font-size-sm);
}

.status-indicator {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--color-error);
}

.status-indicator.active {
  background-color: var(--color-success);
  box-shadow: 0 0 0 3px rgba(var(--color-success-rgb), 0.3);
  animation: pulse 2s infinite;
}

.signal-value {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  min-width: 40px;
  text-align: right;
}

/* Decode Stats */
.decode-stats {
  background: var(--color-bg-8);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
  margin-top: var(--space-16);
}

.decode-stats p {
  margin: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

/* Decoded Image */
.decoded-image-container {
  text-align: center;
  margin-bottom: var(--space-20);
  padding: var(--space-16);
  background: var(--color-bg-1);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
}

#decodedImage {
  max-width: 100%;
  max-height: 400px;
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-md);
}

.decode-results {
  background: var(--color-bg-3);
  padding: var(--space-16);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-20);
}

.decode-results p {
  margin: var(--space-4) 0;
  font-size: var(--font-size-sm);
}

/* Loading States */
.btn--loading {
  position: relative;
  color: transparent;
}

.btn--loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin-top: -10px;
  margin-left: -10px;
  border: 2px solid var(--color-btn-primary-text);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Status Indicators */
.status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-6);
  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--listening {
  background-color: rgba(var(--color-success-rgb), var(--status-bg-opacity));
  color: var(--color-success);
  border: 1px solid rgba(var(--color-success-rgb), var(--status-border-opacity));
}

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

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

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

.pulse {
  animation: pulse 2s infinite;
}



.footer-tagline {
  background-color: var(--glass-bg);
  backdrop-filter: var(--backdrop-filter);
  -webkit-backdrop-filter: var(--backdrop-filter);
  border-top: 1px solid var(--glass-border);
  padding: var(--space-12) var(--space-16);
  text-align: center;
  font-family: var(--font-family-base);
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
  user-select: none;
}

.footer-tagline .tagline {
  margin: 0;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.02em;
}

.footer-tagline .tagline.professional {
  color: var(--color-text-secondary);
}

.footer-tagline .tagline.creative {
  color: var(--color-primary);
  font-style: italic;
}

.footer-tagline .tagline.legal {
  color: var(--color-error);
  font-weight: var(--font-weight-semibold);
}

/* Responsive Design */
@media (max-width: 768px) {
  .tab-nav {
    flex-direction: column;
  }
  
  .tab-btn {
    justify-content: center;
  }
  
  .preset-buttons,
  .input-method-buttons {
    grid-template-columns: 1fr;
  }
  
  .file-info {
    flex-direction: column;
    text-align: center;
  }
  
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .signal-strength {
    flex-direction: column;
    gap: var(--space-8);
  }
  
  .signal-label {
    min-width: auto;
  }
  
  #spectrumCanvas {
    width: 100%;
    height: 150px;
  }
  
  .mic-controls {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: var(--space-12);
  }
  
  .header h1 {
    font-size: var(--font-size-3xl);
  }
}

/* Hidden utility */
.hidden {
  display: none !important;
}

/* Focus states for accessibility */
.file-upload-area:focus-within {
  outline: var(--focus-outline);
  outline-offset: 2px;
}

/* Tooltips */
.tooltip {
  cursor: help;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin-left: var(--space-4);
  display: inline-block;
  width: 16px;
  height: 16px;
  text-align: center;
  line-height: 16px;
  border-radius: 50%;
  background: var(--color-secondary);
  transition: all var(--duration-fast) var(--ease-standard);
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
  .file-upload-area {
    border-width: 3px;
  }
  
  .progress-bar,
  .signal-bar {
    border: 1px solid var(--color-border);
  }
  
  .btn {
    border: 2px solid currentColor;
  }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .file-upload-area,
  .btn,
  .progress-fill,
  .signal-fill {
    transition: none;
  }
  
  .pulse {
    animation: none;
  }
  
  .btn--loading::after {
    animation: none;
  }
}

/* Frequency Spectrum Analyzer */
.spectrum-analyzer-section {
  margin-top: 2rem;
}

.spectrum-analyzer-section h3 {
  margin-bottom: 1rem;
  font-size: var(--font-size-lg);
  color: var(--text-primary);
}

.spectrum-analyzer-container {
  background-color: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.spectrum-analyzer-header {
  background-color: var(--spectrum-header-bg);
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--glass-border);
}

.spectrum-analyzer-header h4 {
  margin: 0;
  font-size: var(--font-size-md);
  color: var(--spectrum-text);
  text-align: center;
  letter-spacing: 1px;
  font-weight: 600;
}

.spectrum-analyzer-display {
  background-color: var(--spectrum-bg);
  padding: 1rem;
  position: relative;
}

#frequencySpectrumCanvas {
  width: 100%;
  height: 200px;
  background-color: var(--spectrum-bg);
  border-radius: 4px;
}

.spectrum-analyzer-controls {
  display: flex;
  background-color: var(--spectrum-controls-bg);
  padding: 1rem;
  border-top: 1px solid var(--glass-border);
}

.spectrum-controls, .signal-status {
  flex: 1;
  padding: 0.5rem 1rem;
}

.spectrum-controls h5, .signal-status h5 {
  margin: 0 0 0.75rem 0;
  font-size: var(--font-size-sm);
  color: var(--spectrum-text);
  letter-spacing: 0.5px;
  font-weight: 600;
}

.control-item, .status-item {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
}

.control-item span:last-child, .status-item span:last-child {
  color: var(--spectrum-text);
  font-family: var(--font-family-mono);
}