: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(138, 43, 226, 1); /* BlueViolet */
  --color-primary-hover: rgba(123, 38, 203, 1);
  --color-primary-active: rgba(108, 33, 180, 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(138, 43, 226, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(138, 43, 226, 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: 138, 43, 226;
  --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(28, 27, 34, 1);
    --color-surface: rgba(35, 34, 43, 1);
    --color-text: rgba(245, 245, 245, 1);
    --color-text-secondary: rgba(167, 169, 169, 0.7);
    --color-primary: rgba(171, 102, 255, 1);
    --color-primary-hover: rgba(156, 87, 240, 1);
    --color-primary-active: rgba(141, 72, 225, 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(171, 102, 255, 1);
    --color-warning: rgba(230, 129, 97, 1);
    --color-info: rgba(167, 169, 169, 1);
    --color-focus-ring: rgba(171, 102, 255, 0.4);
    --color-btn-primary-text: rgba(252, 252, 249, 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: 171, 102, 255;
    --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(28, 27, 34, 1);
  --color-surface: rgba(35, 34, 43, 1);
  --color-text: rgba(245, 245, 245, 1);
  --color-text-secondary: rgba(167, 169, 169, 0.7);
  --color-primary: rgba(171, 102, 255, 1);
  --color-primary-hover: rgba(156, 87, 240, 1);
  --color-primary-active: rgba(141, 72, 225, 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(171, 102, 255, 1);
  --color-warning: rgba(230, 129, 97, 1);
  --color-info: rgba(167, 169, 169, 1);
  --color-focus-ring: rgba(171, 102, 255, 0.4);
  --color-btn-primary-text: rgba(252, 252, 249, 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);
  --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: 171, 102, 255;
  --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(138, 43, 226, 1);
  --color-primary-hover: rgba(123, 38, 203, 1);
  --color-primary-active: rgba(108, 33, 180, 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(138, 43, 226, 1);
  --color-warning: rgba(168, 75, 47, 1);
  --color-info: rgba(98, 108, 113, 1);
  --color-focus-ring: rgba(138, 43, 226, 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: 138, 43, 226;
  --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, 138, 43, 226),
    var(--status-bg-opacity)
  );
  color: var(--color-success);
  border: 1px solid
    rgba(var(--color-success-rgb, 138, 43, 226), 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');
}

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

body {
    font-family: var(--font-family-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-background);
    overflow-x: hidden;
}

html {
    scroll-behavior: smooth;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(28, 27, 34, 0.98);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: all var(--duration-normal) var(--ease-standard);
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-16) 0;
    min-height: 70px;
}

.nav-brand h2 {
    color: var(--color-primary);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-24);
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    padding: var(--space-8) var(--space-12);
    border-radius: var(--radius-base);
    transition: all var(--duration-fast) var(--ease-standard);
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: var(--color-secondary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-8);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--color-text);
    margin: 3px 0;
    transition: var(--duration-fast) var(--ease-standard);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, rgba(28, 27, 34, 1) 0%, rgba(35, 34, 43, 1) 50%, rgba(28, 27, 34, 1) 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(138, 43, 226, 0.1) 0%, transparent 70%);
    animation: pulse 8s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

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

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-16);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-32);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* Sections */
.section {
    padding: var(--space-32) 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
    scroll-margin-top: 80px; /* Account for fixed navbar */
}

.section--alt {
    background-color: var(--color-surface);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-16);
    color: var(--color-text);
}

.section-subtitle {
    text-align: center;
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-32);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Introduction Section */
.intro-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
    align-items: center;
}

.intro-content p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-16);
    line-height: 1.7;
}

.device-features {
    margin-top: var(--space-24);
}

.device-features h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
}

.device-features ul {
    list-style: none;
    padding-left: 0;
}

.device-features li {
    padding: var(--space-8) 0;
    padding-left: var(--space-20);
    position: relative;
}

.device-features li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.device-showcase {
    position: relative;
    text-align: center;
}

.device-img {
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: transform var(--duration-normal) var(--ease-standard);
    cursor: pointer;
}

.device-img:hover {
    transform: scale(1.05);
}

.expand-btn {
    position: absolute;
    bottom: var(--space-16);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border: none;
    padding: var(--space-8) var(--space-16);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: all var(--duration-fast) var(--ease-standard);
}

.expand-btn:hover {
    background: var(--color-primary-hover);
    transform: translateX(-50%) translateY(-2px);
}

/* Current State Section */
.current-state-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
    align-items: start;
}

.current-state-content ul {
    margin-top: var(--space-16);
    list-style: none;
}

.current-state-content li {
    padding: var(--space-8) 0;
    border-bottom: 1px solid var(--color-border);
}

.eeg-diagram {
    position: relative;
}

.eeg-img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.eeg-interactive {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.eeg-point {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    animation: ping 2s infinite;
    transform: translate(-50%, -50%);
    z-index: 10;
}

@keyframes ping {
    0% { box-shadow: 0 0 0 0 rgba(138, 43, 226, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(138, 43, 226, 0); }
    100% { box-shadow: 0 0 0 0 rgba(138, 43, 226, 0); }
}

.eeg-tooltip {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text);
    color: var(--color-background);
    padding: var(--space-8) var(--space-12);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--duration-fast) var(--ease-standard);
    z-index: 20;
}

.eeg-point:hover .eeg-tooltip {
    opacity: 1;
}

/* Comparison Table */
.table-container {
    overflow-x: auto;
    margin-top: var(--space-24);
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: var(--space-16);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.comparison-table th {
    background: var(--color-secondary);
    font-weight: var(--font-weight-semibold);
    position: relative;
}

.sort-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    margin-left: var(--space-8);
    font-size: var(--font-size-sm);
    transition: color var(--duration-fast) var(--ease-standard);
}

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

.comparison-table tr:hover {
    background: var(--color-secondary);
}

/* Applications Section */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-20);
    margin-bottom: var(--space-32);
}

.application-card {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--duration-normal) var(--ease-standard);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.application-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.application-card::before {
    content: 'Click to explore';
    position: absolute;
    top: var(--space-8);
    right: var(--space-12);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.application-card:hover::before {
    opacity: 1;
}

.application-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
}

.application-card ul {
    list-style: none;
    margin: var(--space-16) 0;
}

.application-card li {
    padding: var(--space-4) 0;
    padding-left: var(--space-16);
    position: relative;
}

.application-card li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.target-users {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-style: italic;
}

.applications-gallery {
    text-align: center;
    position: relative;
}

.gallery-img {
    width: 100%;
    max-width: 800px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    cursor: pointer;
    transition: transform var(--duration-normal) var(--ease-standard);
}

.gallery-img:hover {
    transform: scale(1.02);
}

.gallery-btn {
    position: absolute;
    bottom: var(--space-20);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border: none;
    padding: var(--space-12) var(--space-24);
    border-radius: var(--radius-full);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-lg);
    transition: all var(--duration-fast) var(--ease-standard);
}

.gallery-btn:hover {
    background: var(--color-primary-hover);
    transform: translateX(-50%) translateY(-2px);
}

/* Challenges Section */
.challenges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-20);
    margin-bottom: var(--space-32);
}

.challenge-card {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-normal) var(--ease-standard);
}

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

.challenge-card h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
}

.solutions {
    margin-top: var(--space-16);
}

.solutions ul {
    list-style: none;
    margin-top: var(--space-8);
}

.solutions li {
    padding: var(--space-4) 0;
    padding-left: var(--space-16);
    position: relative;
}

.solutions li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--color-success);
}

/* Timeline */
.timeline-container {
    margin-top: var(--space-32);
}

.timeline {
    position: relative;
    padding: var(--space-20) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    width: 2px;
    height: 100%;
    background: var(--color-primary);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--space-24);
    width: 50%;
    padding: var(--space-16);
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
    padding-right: var(--space-32);
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
    padding-left: var(--space-32);
}

.timeline-content {
    background: var(--color-surface);
    padding: var(--space-16);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    position: relative;
}

.timeline-content:hover {
    box-shadow: var(--shadow-md);
    transform: scale(1.02);
}

.timeline-content::before {
    content: 'Click for details';
    position: absolute;
    top: var(--space-8);
    right: var(--space-8);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.timeline-content:hover::before {
    opacity: 1;
}

.timeline-year {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    font-size: var(--font-size-lg);
}

.timeline-event {
    font-weight: var(--font-weight-semibold);
    margin: var(--space-8) 0;
}

.timeline-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Market Section */
.market-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-32);
    margin-bottom: var(--space-32);
    flex-wrap: wrap;
}

.stat-card {
    text-align: center;
    padding: var(--space-20);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    min-width: 200px;
    transition: all var(--duration-normal) var(--ease-standard);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card h3 {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--space-8);
}

.market-chart {
    text-align: center;
    margin-bottom: var(--space-32);
    position: relative;
}

.chart-img {
    width: 100%;
    max-width: 800px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.chart-interactive {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.chart-point {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border-radius: 50%;
    cursor: pointer;
    transform: translate(-50%, -50%);
    transition: all var(--duration-fast) var(--ease-standard);
    pointer-events: all;
    z-index: 10;
}

.chart-point:hover {
    transform: translate(-50%, -50%) scale(1.5);
    background: var(--color-primary-hover);
}

.factors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-20);
}

.factor {
    background: var(--color-surface);
    padding: var(--space-16);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--duration-normal) var(--ease-standard);
}

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

.factor h4 {
    color: var(--color-primary);
    margin-bottom: var(--space-8);
}

/* Ethics Section */
.ethics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-20);
    margin-bottom: var(--space-32);
}

.ethics-card {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--duration-normal) var(--ease-standard);
}

.ethics-card:hover {
    border-color: var(--color-warning);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.ethics-card h3 {
    color: var(--color-warning);
    margin-bottom: var(--space-12);
}

.mitigation {
    margin-top: var(--space-16);
    padding-top: var(--space-16);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
}

/* Poll Section */
.ethics-poll {
    background: var(--color-surface);
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.poll-question p {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-20);
}

.poll-options {
    display: flex;
    gap: var(--space-16);
    justify-content: center;
    margin-bottom: var(--space-20);
    flex-wrap: wrap;
}

.poll-option {
    background: var(--color-secondary);
    border: 1px solid var(--color-border);
    padding: var(--space-12) var(--space-20);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
    color: var(--color-text);
}

.poll-option:hover {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    transform: translateY(-2px);
}

.poll-option.selected {
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    border-color: var(--color-primary);
}

.poll-results {
    margin-top: var(--space-20);
}

.poll-result {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-12);
    padding: var(--space-8) var(--space-16);
    background: var(--color-secondary);
    border-radius: var(--radius-base);
}

.poll-result-info {
    display: flex;
    justify-content: space-between;
    width: 100%;
    margin-bottom: var(--space-4);
}

.poll-bar {
    height: 8px;
    background: var(--color-primary);
    border-radius: var(--radius-sm);
    transition: width var(--duration-normal) var(--ease-standard);
    margin-top: var(--space-4);
}

/* Future Section */
.future-predictions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-20);
    margin: var(--space-32) 0;
}

.prediction {
    background: var(--color-surface);
    padding: var(--space-20);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    text-align: center;
    transition: all var(--duration-normal) var(--ease-standard);
}

.prediction:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.prediction h3 {
    color: var(--color-primary);
    margin-bottom: var(--space-12);
}

.future-timeline-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--space-24);
    flex-wrap: wrap;
    gap: var(--space-16);
}

.future-milestone {
    text-align: center;
    padding: var(--space-16);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    flex: 1;
    min-width: 200px;
    position: relative;
}

.future-milestone:hover {
    transform: scale(1.05);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.future-milestone::before {
    content: 'Click to learn more';
    position: absolute;
    top: var(--space-8);
    right: var(--space-8);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-2) var(--space-6);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-standard);
}

.future-milestone:hover::before {
    opacity: 1;
}

.future-milestone h4 {
    color: var(--color-primary);
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-8);
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-32) 0 var(--space-16);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-32);
    margin-bottom: var(--space-24);
}

.footer-section h3,
.footer-section h4 {
    color: var(--color-primary);
    margin-bottom: var(--space-16);
}

.footer-section ul {
    list-style: none;
}

.footer-section li {
    margin-bottom: var(--space-8);
}

.footer-section a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-standard);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-16);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--color-surface);
    margin: 5% auto;
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    width: 90%;
    max-width: 800px;
    position: relative;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.modal-close {
    position: absolute;
    top: var(--space-16);
    right: var(--space-20);
    font-size: var(--font-size-3xl);
    font-weight: bold;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-standard);
    z-index: 10;
}

.modal-close:hover {
    color: var(--color-error);
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(31, 33, 33, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: start;
        align-items: center;
        padding-top: var(--space-32);
        transition: left var(--duration-normal) var(--ease-standard);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .intro-grid,
    .current-state-grid {
        grid-template-columns: 1fr;
        gap: var(--space-24);
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

    .market-stats {
        flex-direction: column;
        align-items: center;
    }

    .poll-options {
        flex-direction: column;
        align-items: center;
    }

    .poll-option {
        width: 100%;
        max-width: 300px;
    }

    .future-timeline-container {
        flex-direction: column;
    }

    .timeline::before {
        left: var(--space-20);
    }

    .timeline-item {
        width: 100%;
        left: 0;
        text-align: left;
        padding-left: var(--space-32);
        padding-right: var(--space-16);
    }

    .timeline-item:nth-child(even) {
        left: 0;
        text-align: left;
        padding-left: var(--space-32);
    }
}

@media (max-width: 480px) {
    .container {
        padding-left: var(--space-12);
        padding-right: var(--space-12);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: var(--font-size-lg);
    }

    .section {
        padding: var(--space-24) 0;
    }

    .modal-content {
        margin: 10% auto;
        padding: var(--space-16);
        width: 95%;
    }
}

/* Utility classes for smooth interactions */
.fade-in {
    animation: fadeIn 0.6s ease-out;
}

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

.slide-up {
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(40px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Loading states */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

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

@keyframes spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* Improved hover effects */
.interactive-hint {
    position: relative;
}

.interactive-hint::after {
    content: 'Interactive';
    position: absolute;
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-primary);
    color: var(--color-btn-primary-text);
    padding: var(--space-4) var(--space-8);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--duration-fast) var(--ease-standard);
    pointer-events: none;
}

.interactive-hint:hover::after {
    opacity: 1;
}