: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');
}

/* Navigation */
.navigation {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 253, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  transition: all var(--duration-normal) var(--ease-standard);
}

.nav-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-16);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-16);
}

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

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

.progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-border);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  width: 0%;
  transition: width var(--duration-fast) ease-out;
}

/* Hero Section */
.hero-section {
  min-height: 100vh;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-32) var(--space-16);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, var(--color-primary) 0.5px, transparent 0.5px);
  background-size: 40px 40px;
  opacity: 0.03;
  animation: float 20s ease-in-out infinite;
}

.presenter-section {
  position: absolute;
  top: 35%;
  /* Adjust as needed for vertical positioning */
  right: 10%;
  /* Adjust as needed for horizontal positioning */
  /* Added for potential hover effects or pseudo-elements if desired later */
}

.presenter-profile-image {
  width: 200px;
  /* Adjust size as needed */
  height: 200px;
  /* Adjust size as needed */
  border-radius: 50%;
  /* Makes the image circular */
  object-fit: cover;
  /* Ensures the image covers the area without distortion */
  border: 4px solid white;
  /* Adds a white border around the image */
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  /* Adds a subtle shadow for depth */
  transition: transform 0.3s ease-in-out;
  /* Smooth transition for hover effect */
}

.presenter-profile-image:hover {
  transform: scale(1.05);
  /* Slightly enlarge image on hover */
}

.presenter-name {
  margin-top: var(--space-16);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-medium);
  text-align: center;
  color: var(--color-text);
  letter-spacing: var(--letter-spacing-tight);
  transition: color 0.2s ease;
}

.presenter-section:hover .presenter-name {
  color: var(--color-primary);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .presenter-section {
    top: 20px;
    right: 20px;
  }

  .presenter-profile-image {
    width: 80px;
    height: 80px;
    border-width: 3px;
  }

  .presenter-name {
    margin-top: var(--space-4);
    font-size: var(--font-size-md);
  }

  h1 {
    font-size: 2rem;
  }

  p {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .presenter-section {
    /* Center image on very small screens if preferred, or keep top-right */
    /* Example: Centering the image
                left: 50%;
                transform: translateX(-50%);
                right: auto;
                */
    top: 70px;
    right: 15px;
  }

  .presenter-profile-image {
    width: 80px;
    height: 80px;
  }

  h1 {
    font-size: 1.8rem;
  }
}

@keyframes float {

  0%,
  100% {
    transform: translate(0, 0) rotate(0deg);
  }

  50% {
    transform: translate(-20px, -20px) rotate(1deg);
  }
}

.hero-content {
  max-width: 800px;
  z-index: 1;
}

.hero-title {
  font-size: clamp(var(--font-size-3xl), 5vw, 48px);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-16);
  background: linear-gradient(135deg, var(--color-text), var(--color-primary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: var(--line-height-tight);
}

.hero-subtitle {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-16);
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-32);
  line-height: var(--line-height-normal);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-24);
  margin-top: var(--space-32);
}

.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  display: flex;
  flex-direction: column;
  align-items: center;
  transition: transform var(--duration-normal) var(--ease-standard);
  box-shadow: var(--shadow-sm);
}

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

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

.stat-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

/* Section Styles */
.section {
  min-height: 100vh;
  padding: 100px var(--space-16) var(--space-24);
  position: relative;
  display: flex;
  align-items: center;
}

.section:nth-child(even) {
  background: var(--color-surface);
}

.section-title {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  text-align: center;
  margin-bottom: var(--space-32);
  color: var(--color-text);
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -var(--space-16);
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  border-radius: var(--radius-full);
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--space-16);
}

/* Introduction Section */
.intro-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-32);
  align-items: start;
}

.intro-content h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.intro-content p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
  line-height: var(--line-height-normal);
}

.comparison-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  margin-top: var(--space-16);
}

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

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

.comparison-card.traditional {
  border-left: 4px solid var(--color-warning);
}

.comparison-card.agentic {
  border-left: 4px solid var(--color-success);
}

.comparison-card h4 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
  font-size: var(--font-size-lg);
}

.comparison-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.comparison-card li {
  padding: var(--space-4) 0;
  color: var(--color-text-secondary);
  position: relative;
  padding-left: var(--space-16);
}

.comparison-card li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: bold;
}

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

.stat-item {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  transition: transform var(--duration-normal) var(--ease-standard);
}

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

.stat-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-success));
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

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

.stat-details h4 {
  margin-bottom: var(--space-4);
  color: var(--color-text);
  font-size: var(--font-size-lg);
}

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

.stat-context {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  font-style: italic;
}

/* Prompting Section */
.prompting-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
}

.principles-section h3,
.example-section h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-20);
  color: var(--color-text);
}

.principle-cards {
  display: grid;
  gap: var(--space-16);
}

.principle-card {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  border-left: 4px solid var(--color-primary);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.principle-card:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.principle-card h4 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.principle-card p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.prompt-comparison {
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
}

.prompt-example {
  border-radius: var(--radius-lg);
  padding: var(--space-16);
  border: 1px solid var(--color-card-border);
}

.prompt-example.bad {
  background: rgba(var(--color-error-rgb), 0.05);
  border-left: 4px solid var(--color-error);
}

.prompt-example.good {
  background: rgba(var(--color-success-rgb), 0.05);
  border-left: 4px solid var(--color-success);
}

.prompt-example h4 {
  margin-bottom: var(--space-12);
}

.prompt-text {
  background: var(--color-background);
  border-radius: var(--radius-base);
  padding: var(--space-16);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: 1.6;
  overflow-x: auto;
  white-space: pre-line;
}

/* MCP Section */
.mcp-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.mcp-intro h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.mcp-intro p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

.architecture-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-16);
  margin: var(--space-24) 0;
  flex-wrap: wrap;
}

.arch-component {
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  text-align: center;
  min-width: 180px;
  transition: transform var(--duration-normal) var(--ease-standard);
}

.arch-component:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

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

.arch-component p {
  margin-bottom: var(--space-4);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.arch-component span {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

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

.capability-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-16);
}

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

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

.capability-card h4 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

.capability-card p {
  color: var(--color-text-secondary);
  margin: 0;
}

.security-checklist {
  display: flex;
  flex-direction: column;
  gap: var(--space-12);
}

.security-item {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-16);
  transition: transform var(--duration-normal) var(--ease-standard);
}

.security-item:hover {
  transform: translateX(4px);
}

.security-icon {
  font-size: var(--font-size-lg);
}

/* Claude Evolution Section */
.claude-evolution-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.evolution-intro h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.evolution-intro p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
}

.chart-container {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
  text-align: center;
}

.chart-container h3 {
  margin-bottom: var(--space-20);
  color: var(--color-text);
}

.performance-chart {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-sm);
}

.chart-caption {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-12);
  font-style: italic;
}

.model-timeline {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.model-timeline h3 {
  margin-bottom: var(--space-24);
  color: var(--color-text);
  text-align: center;
}

.timeline-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-20);
  position: relative;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 60px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  display: flex;
  align-items: center;
  gap: var(--space-20);
  position: relative;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 54px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-surface);
  z-index: 1;
}

.timeline-item.breakthrough::before {
  background: #FF6B35;
  width: 16px;
  height: 16px;
  left: 52px;
}

.timeline-item.world-class::before {
  background: linear-gradient(135deg, #FFD700, #FFA500);
  width: 16px;
  height: 16px;
  left: 52px;
}

.timeline-date {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  min-width: 120px;
  text-align: right;
  padding-right: var(--space-20);
}

.timeline-content {
  flex: 1;
  background: var(--color-background);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-16);
  position: relative;
}

.timeline-content h4 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.timeline-content p {
  margin-bottom: var(--space-8);
  color: var(--color-text-secondary);
}

.timeline-features {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.breakthrough-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: #FF6B35;
  color: white;
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-base);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.world-class-badge {
  position: absolute;
  top: -8px;
  right: -8px;
  background: linear-gradient(135deg, #FFD700, #FFA500);
  color: var(--color-text);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-base);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
}

.models-comparison-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-20);
}

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

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

.model-detail-card.claude-37 {
  border-top: 4px solid #FF6B35;
}

.model-detail-card.claude-4 {
  border-top: 4px solid #FFD700;
}

.model-detail-card.claude-4-sonnet {
  border-top: 4px solid #FF6B35;
}

.model-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-16);
}

.model-header h4 {
  color: var(--color-text);
  margin: 0;
}

.release-date {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: var(--color-secondary);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-base);
}

.model-metrics {
  display: flex;
  gap: var(--space-16);
  margin-bottom: var(--space-16);
}

.metric {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--color-background);
  border-radius: var(--radius-base);
  padding: var(--space-12);
  flex: 1;
}

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

.metric-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-align: center;
}

.model-features h5 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

.model-features ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.model-features li {
  padding: var(--space-4) 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.citation-ref {
  margin-top: var(--space-16);
  padding-top: var(--space-12);
  border-top: 1px solid var(--color-border);
}

.citation-ref small {
  color: var(--color-text-secondary);
  font-style: italic;
}

.research-validation {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.research-validation h3 {
  margin-bottom: var(--space-20);
  color: var(--color-text);
  text-align: center;
}

.validation-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-16);
  margin-bottom: var(--space-24);
}

.validation-item {
  background: var(--color-background);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-16);
}

.validation-item h4 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.validation-item p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

/* TDD Section */
.tdd-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.analogy-section h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.analogy-section p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
  line-height: var(--line-height-normal);
}

.analogy-comparison {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-24);
}

.analogy-item {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
}

.analogy-item h4 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

.analogy-item p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-16);
}

.analogy-visual {
  background: var(--color-background);
  border-radius: var(--radius-base);
  padding: var(--space-12);
}

.fitness-bar {
  height: 24px;
  background: linear-gradient(90deg, var(--color-success), var(--color-primary));
  border-radius: var(--radius-base);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.test-results {
  display: flex;
  gap: var(--space-16);
  align-items: center;
}

.test-pass {
  color: var(--color-success);
  font-weight: var(--font-weight-medium);
}

.test-fail {
  color: var(--color-error);
  font-weight: var(--font-weight-medium);
}

.coverage {
  color: var(--color-info);
  font-weight: var(--font-weight-medium);
}

.ffdd-concept {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.ffdd-concept h3 {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.ffdd-concept p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-24);
  line-height: var(--line-height-normal);
}

.ffdd-process {
  display: flex;
  align-items: center;
  gap: var(--space-16);
  flex-wrap: wrap;
  justify-content: center;
}

.research {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.research h3 {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.research p {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

.process-step {
  background: var(--color-background);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  text-align: center;
  min-width: 200px;
  transition: transform var(--duration-normal) var(--ease-standard);
}

.process-step:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

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

.process-step p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

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

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

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

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

.benefit-card h4 {
  margin-bottom: var(--space-12);
  color: var(--color-text);
}

.benefit-card p {
  color: var(--color-text-secondary);
  margin: 0;
}

/* Hybrid Section */
.hybrid-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-32);
}

.approach-section {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.approach-section.llm {
  border-left: 4px solid #FF6B35;
}

.approach-section.classical {
  border-left: 4px solid #4285F4;
}

.approach-section h3 {
  margin-bottom: var(--space-20);
  color: var(--color-text);
}

.capabilities-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.capability-item {
  display: flex;
  align-items: center;
  gap: var(--space-12);
  background: var(--color-background);
  border-radius: var(--radius-base);
  padding: var(--space-12);
}

.capability-metric {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  min-width: 60px;
}

.capability-desc {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

.integration-pattern h3 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-20);
  color: var(--color-text);
  text-align: center;
}

.pattern-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-16);
  flex-wrap: wrap;
}

.pattern-step {
  background: var(--color-surface);
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-20);
  text-align: center;
  min-width: 200px;
  transition: transform var(--duration-normal) var(--ease-standard);
}

.pattern-step:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-lg);
}

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

.pattern-step p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

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

.integration-challenges {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.integration-challenges h3 {
  margin-bottom: var(--space-20);
  color: var(--color-text);
  text-align: center;
}

.challenge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-16);
}

.challenge-item {
  background: var(--color-background);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-16);
}

.challenge-item h4 {
  margin-bottom: var(--space-8);
  color: var(--color-text);
}

.challenge-item p {
  margin-bottom: var(--space-8);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* Conclusion Section */
.conclusion-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-32);
}

.takeaways-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-20);
}

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

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

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

.takeaway-card p {
  color: var(--color-text-secondary);
  margin: 0;
}

.next-steps {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.next-steps h3 {
  margin-bottom: var(--space-12);
  color: white;
}

.next-steps p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: 0;
}

.demo-prep {
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-base);
  padding: var(--space-12);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-16);
}

.demo-status {
  font-weight: var(--font-weight-medium);
}

.timer {
  font-family: var(--font-family-mono);
  font-weight: var(--font-weight-bold);
  background: rgba(255, 255, 255, 0.2);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-base);
}

.citations-section {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.citations-section h3 {
  margin-bottom: var(--space-20);
  color: var(--color-text);
  text-align: center;
}

.citations-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-16);
}

.citation-item {
  display: flex;
  gap: var(--space-16);
  background: var(--color-background);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  padding: var(--space-16);
}

.citation-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

.citation-content {
  flex: 1;
}

.citation-content strong {
  color: var(--color-text);
  display: block;
  margin-bottom: var(--space-4);
}

.citation-content p {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  margin: 0;
}

.qa-section {
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  padding: var(--space-24);
}

.qa-section h3 {
  margin-bottom: var(--space-16);
  color: var(--color-text);
}

.qa-section p {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: var(--font-size-lg);
}

/* Animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  animation: fadeInUp 1s ease-out forwards;
}

@keyframes fadeInUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-delayed {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .timeline-container {
    display: block;
  }

  .timeline-container::before {
    display: none;
  }

  .timeline-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .timeline-item::before {
    display: none;
  }

  .timeline-date {
    min-width: auto;
    text-align: left;
    padding-right: 0;
    margin-bottom: var(--space-8);
  }

  .models-comparison-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    gap: var(--space-8);
  }

  .nav-link {
    font-size: var(--font-size-xs);
    padding: var(--space-6) var(--space-8);
  }

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

  .intro-grid,
  .prompting-grid,
  .comparison-grid {
    grid-template-columns: 1fr;
  }

  .architecture-diagram,
  .pattern-flow,
  .ffdd-process {
    flex-direction: column;
  }

  .arch-arrow,
  .pattern-arrow,
  .process-arrow {
    transform: rotate(90deg);
  }

  .analogy-comparison {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 80px var(--space-16) var(--space-16);
  }

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

  .validation-grid,
  .challenge-grid {
    grid-template-columns: 1fr;
  }

  .citation-tooltip {
    max-width: 95vw;
    min-width: 280px;
  }
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  .navigation {
    background: rgba(38, 40, 40, 0.95);
  }

  .hero-section {
    background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
  }
}

[data-color-scheme="dark"] .navigation {
  background: rgba(38, 40, 40, 0.95);
}

[data-color-scheme="dark"] .hero-section {
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 100%);
}

/* Citation Tooltips */
.cited-text {
  border-bottom: 1px dotted var(--color-primary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-standard);
  position: relative;
}

.cited-text:hover {
  border-bottom-color: var(--color-primary-hover);
  color: var(--color-primary);
  background: rgba(var(--color-success-rgb), 0.05);
}

.citation-tooltip {
  position: absolute;
  z-index: 2000;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-base);
  box-shadow: var(--shadow-lg), 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  padding: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--duration-normal) var(--ease-standard);
  max-width: 320px;
  min-width: 280px;
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  pointer-events: none;
  backdrop-filter: blur(12px);
}

.citation-tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}

.citation-tooltip.position-top {
  transform: translateY(-8px);
}

.citation-tooltip.position-top.visible {
  transform: translateY(0);
}

.citation-tooltip.position-left {
  transform: translateX(-8px);
}

.citation-tooltip.position-left.visible {
  transform: translateX(0);
}

.citation-tooltip.position-right {
  transform: translateX(8px);
}

.citation-tooltip.position-right.visible {
  transform: translateX(0);
}

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

.tooltip-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-12);
  gap: var(--space-8);
}

.tooltip-title {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-md);
  line-height: var(--line-height-tight);
  flex: 1;
  margin: 0 0 var(--space-8) 0;
}

.tooltip-source {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-tight);
  flex: 1;
  font-style: italic;
  margin: 0 0 var(--space-8) 0;
}

.tooltip-summary {
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  margin: 0 0 var(--space-8) 0;
}

.tooltip-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  background: var(--color-secondary);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-sm);
  white-space: nowrap;
  font-weight: var(--font-weight-medium);
}

.tooltip-preview {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

.tooltip-footer {
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-card-border-inner);
}

.tooltip-click-hint {
  font-size: var(--font-size-xs);
  color: var(--color-info);
  font-style: italic;
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.tooltip-click-hint::before {
  content: "🔗";
  font-style: normal;
}

.tooltip-arrow {
  position: absolute;
  width: 8px;
  height: 8px;
  background: var(--color-surface);
  border: 1px solid var(--color-card-border);
  transform: rotate(45deg);
  pointer-events: none;
}

.citation-tooltip.position-bottom .tooltip-arrow {
  top: -5px;
  left: 50%;
  margin-left: -4px;
  border-bottom: none;
  border-right: none;
}

.citation-tooltip.position-top .tooltip-arrow {
  bottom: -5px;
  left: 50%;
  margin-left: -4px;
  border-top: none;
  border-left: none;
}

.citation-tooltip.position-left .tooltip-arrow {
  right: -5px;
  top: 50%;
  margin-top: -4px;
  border-left: none;
  border-bottom: none;
}

.citation-tooltip.position-right .tooltip-arrow {
  left: -5px;
  top: 50%;
  margin-top: -4px;
  border-right: none;
  border-top: none;
}

/* Cited text styling */
[data-cite] {
  position: relative;
  cursor: pointer;
  border-bottom: 1px dotted var(--color-primary);
  transition: border-color var(--duration-fast) var(--ease-standard);
}

[data-cite]:hover {
  border-bottom-color: var(--color-primary-hover);
}

/* Citation hover state enhancements */
.cited-text:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.cited-text:active {
  background: rgba(var(--color-success-rgb), 0.1);
}

/* Touch-friendly citation styling */
@media (hover: none) and (pointer: coarse) {
  .cited-text {
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    background: rgba(var(--color-success-rgb), 0.05);
    border-bottom: 2px solid var(--color-primary);
  }

  .citation-tooltip {
    font-size: var(--font-size-md);
    min-width: 280px;
    max-width: 90vw;
  }
}

/* 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');
}