:root {
  /* Colors */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);
  --color-select-caret: rgba(19, 52, 59, 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;
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: rgba(31, 33, 33, 1);
    --color-surface: rgba(38, 40, 40, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(50, 184, 198, 1);
    --color-primary-hover: rgba(45, 166, 178, 1);
    --color-primary-active: rgba(41, 150, 161, 1);
    --color-secondary: rgba(119, 124, 124, 0.15);
    --color-secondary-hover: rgba(119, 124, 124, 0.25);
    --color-secondary-active: rgba(119, 124, 124, 0.3);
    --color-border: rgba(119, 124, 124, 0.3);
    --color-error: rgba(255, 84, 89, 1);
    --color-success: rgba(50, 184, 198, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(50, 184, 198, 0.4);
    --color-btn-primary-text: rgba(19, 52, 59, 1);
    --color-card-border: rgba(119, 124, 124, 0.2);
    --color-card-border-inner: rgba(119, 124, 124, 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);
    --button-border-secondary: rgba(119, 124, 124, 0.2);
    --color-border-secondary: rgba(119, 124, 124, 0.2);
    --color-select-caret: rgba(245, 245, 245, 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: 50, 184, 198;
    --color-error-rgb: 255, 84, 89;
    --color-warning-rgb: 230, 129, 97;
    --color-info-rgb: 167, 169, 169;
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  --color-background: rgba(31, 33, 33, 1);
  --color-surface: rgba(38, 40, 40, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(50, 184, 198, 1);
  --color-primary-hover: rgba(45, 166, 178, 1);
  --color-primary-active: rgba(41, 150, 161, 1);
  --color-secondary: rgba(119, 124, 124, 0.15);
  --color-secondary-hover: rgba(119, 124, 124, 0.25);
  --color-secondary-active: rgba(119, 124, 124, 0.3);
  --color-border: rgba(119, 124, 124, 0.3);
  --color-error: rgba(255, 84, 89, 1);
  --color-success: rgba(50, 184, 198, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(50, 184, 198, 0.4);
  --color-btn-primary-text: rgba(19, 52, 59, 1);
  --color-card-border: rgba(119, 124, 124, 0.15);
  --color-card-border-inner: rgba(119, 124, 124, 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(119, 124, 124, 0.2);
  --color-select-caret: rgba(245, 245, 245, 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: 50, 184, 198;
  --color-error-rgb: 255, 84, 89;
  --color-warning-rgb: 230, 129, 97;
  --color-info-rgb: 167, 169, 169;
}

[data-color-scheme="light"] {
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: rgba(19, 52, 59, 1);
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgba(29, 116, 128, 1);
  --color-primary-active: rgba(26, 104, 115, 1);
  --color-secondary: rgba(94, 82, 64, 0.12);
  --color-secondary-hover: rgba(94, 82, 64, 0.2);
  --color-secondary-active: rgba(94, 82, 64, 0.25);
  --color-border: rgba(94, 82, 64, 0.2);
  --color-btn-primary-text: rgba(252, 252, 249, 1);
  --color-card-border: rgba(94, 82, 64, 0.12);
  --color-card-border-inner: rgba(94, 82, 64, 0.12);
  --color-error: rgba(192, 21, 47, 1);
  --color-success: rgba(33, 128, 141, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(33, 128, 141, 0.4);

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

/* 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://www.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* Custom styles for La Tercera Dimensión */

/* Cosmic theme variables */
:root {
  --cosmic-primary: #1a237e;
  --cosmic-secondary: #3f51b5;
  --cosmic-accent: #7c4dff;
  --cosmic-light: #e8eaf6;
  --cosmic-dark: #0d1421;
  --cosmic-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --cosmic-glow: 0 0 20px rgba(124, 77, 255, 0.3);
  --text-glow: 0 0 10px rgba(124, 77, 255, 0.5);
  
  /* Improved readability colors */
  --text-primary: #f5f5f5;
  --text-secondary: #e0e0e0;
  --text-muted: #b0b0b0;
}

/* Dark mode cosmic adjustments */
@media (prefers-color-scheme: dark) {
  :root {
    --cosmic-primary: #3f51b5;
    --cosmic-secondary: #5c6bc0;
    --cosmic-accent: #9c27b0;
    --cosmic-light: #1a237e;
    --cosmic-dark: #000051;
  }
}

/* Base cosmic styling */
body {
  background: var(--cosmic-dark);
  background-image: 
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(120, 255, 198, 0.05) 0%, transparent 50%);
  min-height: 100vh;
  color: var(--text-primary);
  overflow-x: hidden;
}

/* Navigation Header */
.nav-header {
  background: rgba(13, 20, 33, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(124, 77, 255, 0.2);
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  padding: var(--space-12) 0;
}

.logo-text {
  background: var(--cosmic-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin: 0;
}

.main-nav {
  gap: var(--space-20);
}

.nav-btn {
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: var(--font-size-base);
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.nav-btn:hover {
  background: rgba(124, 77, 255, 0.1);
  color: var(--cosmic-accent);
  box-shadow: var(--cosmic-glow);
}

.search-container {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.search-input {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(124, 77, 255, 0.3);
  border-radius: var(--radius-base);
  padding: var(--space-6) var(--space-12);
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  width: 200px;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  border-color: var(--cosmic-accent);
  box-shadow: var(--cosmic-glow);
  outline: none;
  background: rgba(255, 255, 255, 0.2);
}

.search-btn {
  background: var(--cosmic-accent);
  border: none;
  border-radius: var(--radius-base);
  padding: var(--space-6) var(--space-12);
  color: white;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.search-btn:hover {
  background: var(--cosmic-secondary);
  box-shadow: var(--cosmic-glow);
}

/* Progress Bar */
.progress-container {
  position: fixed;
  top: 60px;
  left: 0;
  width: 100%;
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  z-index: 999;
}

.progress-bar {
  height: 100%;
  background: var(--cosmic-gradient);
  width: 0%;
  transition: width 0.3s ease;
}

/* Main Content */
.main-content {
  margin-top: 70px;
  min-height: calc(100vh - 70px);
}

/* Views */
.view {
  display: none;
  padding: var(--space-32) 0;
}

.view.active {
  display: block;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.cosmic-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--cosmic-gradient);
  opacity: 0.1;
  animation: cosmicPulse 8s ease-in-out infinite;
}

@keyframes cosmicPulse {
  0%, 100% { opacity: 0.1; }
  50% { opacity: 0.2; }
}

.hero-content {
  text-align: center;
  z-index: 2;
  position: relative;
}

.hero-title {
  font-size: clamp(var(--font-size-3xl), 5vw, 64px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-24);
  background: var(--cosmic-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: var(--text-glow);
}

.hero-subtitle {
  font-size: var(--font-size-xl);
  line-height: var(--line-height-normal);
  margin-bottom: var(--space-32);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  color: var(--text-secondary);
}

.hero-actions {
  display: flex;
  gap: var(--space-16);
  justify-content: center;
  flex-wrap: wrap;
}

/* Section Titles */
.section-title {
  text-align: center;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-32);
  background: var(--cosmic-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Table of Contents Grid */
.toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--space-24);
  margin-top: var(--space-32);
}

.toc-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(124, 77, 255, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  backdrop-filter: blur(10px);
}

.toc-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--cosmic-glow);
  border-color: var(--cosmic-accent);
  background: rgba(255, 255, 255, 0.12);
}

.toc-image {
  height: 200px;
  overflow: hidden;
}

.toc-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-normal) var(--ease-standard);
}

.toc-item:hover .toc-image img {
  transform: scale(1.05);
}

.toc-content {
  padding: var(--space-20);
}

.toc-content h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-12);
  color: var(--cosmic-accent);
}

.toc-content p {
  color: var(--text-secondary);
  margin-bottom: var(--space-16);
  line-height: var(--line-height-normal);
}

.toc-concepts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-8);
}

.concept-tag {
  background: rgba(124, 77, 255, 0.2);
  color: var(--cosmic-accent);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  border: 1px solid rgba(124, 77, 255, 0.3);
}

/* Chapter Navigation */
.chapter-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-32);
  gap: var(--space-16);
}

.chapter-nav.bottom {
  margin-top: var(--space-32);
  margin-bottom: 0;
}

/* Chapter Content */
.chapter-content {
  max-width: 800px;
  margin: 0 auto;
}

.chapter-header {
  text-align: center;
  margin-bottom: var(--space-32);
}

.chapter-header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-24);
  background: var(--cosmic-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.chapter-image {
  margin: var(--space-24) 0;
}

.chapter-image img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--cosmic-glow);
}

.chapter-text {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  color: var(--text-primary);
  background: rgba(13, 20, 33, 0.4);
  padding: var(--space-24);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 77, 255, 0.1);
}

.chapter-text p {
  margin-bottom: var(--space-20);
  text-align: justify;
  text-indent: 1.5em;
}

.chapter-text p:first-child {
  text-indent: 0;
}

.chapter-concepts {
  margin-top: var(--space-32);
  padding: var(--space-20);
  background: rgba(124, 77, 255, 0.1);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 77, 255, 0.2);
}

.chapter-concepts h4 {
  color: var(--cosmic-accent);
  margin-bottom: var(--space-16);
}

/* Complete Book View */
.complete-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-32);
  flex-wrap: wrap;
  gap: var(--space-16);
}

.complete-header h2 {
  color: var(--text-primary);
  background: var(--cosmic-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.reading-controls {
  display: flex;
  gap: var(--space-8);
}

.complete-book-content {
  max-width: 900px;
  margin: 0 auto;
  font-size: var(--font-size-lg);
  line-height: 1.8;
  background: rgba(13, 20, 33, 0.4);
  padding: var(--space-32);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(124, 77, 255, 0.1);
}

.complete-book-content .complete-chapter {
  margin-bottom: var(--space-32);
  padding-bottom: var(--space-32);
  border-bottom: 1px solid rgba(124, 77, 255, 0.2);
}

.complete-book-content .complete-chapter:last-child {
  border-bottom: none;
}

.complete-book-content h2 {
  color: var(--cosmic-accent);
  margin-bottom: var(--space-24);
  font-size: var(--font-size-2xl);
}

.complete-book-content p {
  margin-bottom: var(--space-16);
  text-align: justify;
  color: var(--text-primary);
  text-indent: 1.5em;
}

.complete-book-content .chapter-image img {
  margin: var(--space-20) 0;
}

/* Reading Mode */
.reading-mode {
  background: var(--color-background);
  color: var(--color-text);
}

.reading-mode .nav-header,
.reading-mode .progress-container {
  display: none;
}

.reading-mode .main-content {
  margin-top: 0;
}

/* Search Results */
.search-result {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(124, 77, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  margin-bottom: var(--space-16);
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
}

.search-result:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--cosmic-accent);
}

.search-result h3 {
  color: var(--cosmic-accent);
  margin-bottom: var(--space-8);
}

.search-result .search-excerpt {
  color: var(--text-secondary);
  line-height: var(--line-height-normal);
}

.search-highlight {
  background: rgba(124, 77, 255, 0.4);
  color: var(--cosmic-accent);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-semibold);
}

/* Back to Top Button - Made clearer */
.back-to-top {
  position: fixed;
  bottom: var(--space-24);
  right: var(--space-24);
  background: var(--cosmic-accent);
  color: white;
  border: none;
  border-radius: 50%;
  width: 56px;
  height: 56px;
  font-size: var(--font-size-xl);
  cursor: pointer;
  box-shadow: var(--cosmic-glow);
  transition: all var(--duration-normal) var(--ease-standard);
  opacity: 0;
  transform: translateY(20px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top::before {
  content: "↑";
  font-weight: bold;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--cosmic-secondary);
  transform: translateY(-3px);
  box-shadow: 0 0 40px rgba(124, 77, 255, 0.6);
}

/* Reading Progress Indicator */
.reading-indicator {
  position: fixed;
  right: var(--space-24);
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 200px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  z-index: 999;
}

.reading-progress {
  width: 100%;
  background: var(--cosmic-gradient);
  border-radius: var(--radius-full);
  height: 0%;
  transition: height 0.3s ease;
}

/* Custom Button Styles */
.btn--cosmic {
  background: var(--cosmic-gradient);
  color: white;
  border: none;
  box-shadow: var(--cosmic-glow);
}

.btn--cosmic:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(124, 77, 255, 0.5);
}

/* Text Size Classes */
.text-small {
  font-size: var(--font-size-base);
}

.text-medium {
  font-size: var(--font-size-lg);
}

.text-large {
  font-size: var(--font-size-xl);
}

.text-extra-large {
  font-size: var(--font-size-2xl);
}

/* Improved button styling */
.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(--cosmic-accent);
  color: white;
}

.btn--primary:hover {
  background: var(--cosmic-secondary);
  box-shadow: var(--cosmic-glow);
}

.btn--secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
  border: 1px solid rgba(124, 77, 255, 0.3);
}

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

.btn--outline {
  background: transparent;
  border: 1px solid rgba(124, 77, 255, 0.4);
  color: var(--text-primary);
}

.btn--outline:hover {
  background: rgba(124, 77, 255, 0.1);
  border-color: var(--cosmic-accent);
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-12);
  }
  
  .nav-header {
    padding: var(--space-8) 0;
  }
  
  .main-nav {
    flex-direction: column;
    gap: var(--space-8);
  }
  
  .search-container {
    width: 100%;
  }
  
  .search-input {
    width: 100%;
  }
  
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  
  .toc-grid {
    grid-template-columns: 1fr;
    gap: var(--space-16);
  }
  
  .chapter-nav {
    flex-direction: column;
    gap: var(--space-12);
  }
  
  .complete-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .reading-indicator {
    display: none;
  }
  
  .back-to-top {
    bottom: var(--space-16);
    right: var(--space-16);
    width: 48px;
    height: 48px;
  }
  
  .chapter-text,
  .complete-book-content {
    padding: var(--space-16);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
  
  .toc-item {
    min-width: unset;
  }
  
  .chapter-text,
  .complete-book-content {
    font-size: var(--font-size-base);
  }
}

/* Print Styles */
@media print {
  .nav-header,
  .progress-container,
  .chapter-nav,
  .back-to-top,
  .reading-indicator {
    display: none !important;
  }
  
  .main-content {
    margin-top: 0;
  }
  
  .chapter-content,
  .complete-book-content {
    max-width: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .chapter-text,
  .complete-book-content {
    font-size: 12pt;
    line-height: 1.5;
    background: white;
    color: black;
  }
}