:root {
  /* Logo-Inspired Color Palette */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98, 108, 113, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  
  /* Logo Colors - Orange, Blue, Green */
  --color-orange: rgba(255, 140, 0, 1);      /* Logo Orange */
  --color-orange-light: rgba(255, 165, 0, 1);
  --color-orange-dark: rgba(255, 100, 0, 1);
  
  --color-blue: rgba(0, 123, 255, 1);        /* Logo Blue */
  --color-blue-light: rgba(0, 150, 255, 1);
  --color-blue-dark: rgba(0, 100, 200, 1);
  
  --color-green: rgba(40, 167, 69, 1);       /* Logo Green */
  --color-green-light: rgba(60, 200, 90, 1);
  --color-green-dark: rgba(30, 140, 50, 1);
  
  /* Neutral grays for text and backgrounds */
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);

  /* RGB versions for opacity control */
  --color-orange-rgb: 255, 140, 0;
  --color-blue-rgb: 0, 123, 255;
  --color-green-rgb: 40, 167, 69;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;

  /* Logo-Inspired Background Colors */
  --color-bg-1: rgba(var(--color-blue-rgb), 0.08);   /* Light blue */
  --color-bg-2: rgba(var(--color-orange-rgb), 0.08); /* Light orange */
  --color-bg-3: rgba(var(--color-green-rgb), 0.08);  /* Light green */
  --color-bg-4: rgba(var(--color-blue-rgb), 0.12);   /* Medium blue */
  --color-bg-5: rgba(var(--color-orange-rgb), 0.12); /* Medium orange */
  --color-bg-6: rgba(var(--color-green-rgb), 0.12);  /* Medium green */
  --color-bg-7: rgba(var(--color-blue-rgb), 0.15);   /* Strong blue */
  --color-bg-8: rgba(var(--color-orange-rgb), 0.15); /* Strong orange */

  /* Logo-Inspired Semantic Colors */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-blue);
  --color-primary-hover: var(--color-blue-dark);
  --color-primary-active: var(--color-blue-dark);
  --color-secondary: rgba(var(--color-orange-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-orange-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-orange-rgb), 0.25);
  --color-border: rgba(var(--color-blue-rgb), 0.2);
  --color-btn-primary-text: var(--color-white);
  --color-card-border: rgba(var(--color-blue-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-blue-rgb), 0.12);
  --color-error: var(--color-orange-dark);
  --color-success: var(--color-green);
  --color-warning: var(--color-orange);
  --color-info: var(--color-blue);
  --color-focus-ring: rgba(var(--color-blue-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

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

  /* RGB versions for opacity control */
  --color-success-rgb: var(--color-green-rgb);
  --color-error-rgb: 255, 100, 0;
  --color-warning-rgb: var(--color-orange-rgb);
  --color-info-rgb: var(--color-blue-rgb);

  /* 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;
}



/* 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-blue);
  color: var(--color-btn-primary-text);
  box-shadow: 0 2px 4px rgba(var(--color-blue-rgb), 0.2);
}

.btn--primary:hover {
  background: var(--color-blue-dark);
  box-shadow: 0 4px 8px rgba(var(--color-blue-rgb), 0.3);
}

.btn--primary:active {
  background: var(--color-blue-dark);
  box-shadow: 0 2px 4px rgba(var(--color-blue-rgb), 0.2);
}

.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);
}


.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;
}


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

/* END PERPLEXITY DESIGN SYSTEM */
/* Custom styles built on top of the design system */

/* Global Styles */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', var(--font-family-base);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.98);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--duration-normal) var(--ease-standard);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}


.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    /* padding: var(--space-16) var(--space-24); */
    width: 100%;
    margin: 0;
    max-width: var(--container-xlg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    text-decoration: none;
    flex-shrink: 0;
    margin-left: var(--space-32);
}

.nav-brand img {
   width: 260px;
   height: 80px;
   object-fit: cover;
}

.nav-brand i {
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-32);
    align-items: center;
    margin-left: auto;
}

.nav-link {
    color: var(--color-text);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-base);
    transition: color var(--duration-fast) var(--ease-standard);
    position: relative;
    padding: var(--space-8) 0;
    text-decoration: none;
    opacity: 1;
    visibility: visible;
    white-space: nowrap;
}

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

.nav-link.active {
    color: var(--color-primary);
    font-weight: var(--font-weight-semibold);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--color-green);
    transition: width var(--duration-normal) var(--ease-standard);
    border-radius: 2px;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: var(--space-8);
    border-radius: var(--radius-base);
    transition: all var(--duration-fast) var(--ease-standard);
}

.nav-toggle:hover {
    background: rgba(var(--color-teal-500-rgb), 0.1);
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    transition: all var(--duration-fast) var(--ease-standard);
    border-radius: 2px;
}

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

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

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, 
        rgba(var(--color-blue-rgb), 0.1) 0%, 
        rgba(var(--color-orange-rgb), 0.1) 50%, 
        rgba(var(--color-green-rgb), 0.1) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    animation: gradientShift 8s ease-in-out infinite;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 50%, rgba(var(--color-blue-rgb), 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(var(--color-orange-rgb), 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 80%, rgba(var(--color-green-rgb), 0.15) 0%, transparent 50%);
    pointer-events: none;
    animation: floatingBubbles 12s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 60% 30%, rgba(var(--color-orange-rgb), 0.08) 0%, transparent 40%),
        radial-gradient(circle at 30% 70%, rgba(var(--color-green-rgb), 0.08) 0%, transparent 40%),
        radial-gradient(circle at 70% 80%, rgba(var(--color-blue-rgb), 0.08) 0%, transparent 40%);
    pointer-events: none;
    animation: floatingBubbles 15s ease-in-out infinite reverse;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s var(--ease-standard);
}

/* AI-themed floating elements */
.hero-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* Neural network nodes */
.neural-node {
    position: absolute;
    width: 12px;
    height: 12px;
    background: var(--color-blue);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
    box-shadow: 0 0 20px rgba(var(--color-blue-rgb), 0.3);
}

.neural-node:nth-child(1) {
    top: 25%;
    left: 15%;
    animation-delay: 0s;
}

.neural-node:nth-child(2) {
    top: 45%;
    left: 25%;
    background: var(--color-orange);
    box-shadow: 0 0 20px rgba(var(--color-orange-rgb), 0.3);
    animation-delay: 0.5s;
}

.neural-node:nth-child(3) {
    top: 65%;
    left: 20%;
    background: var(--color-green);
    box-shadow: 0 0 20px rgba(var(--color-green-rgb), 0.3);
    animation-delay: 1s;
}

.neural-node:nth-child(4) {
    top: 30%;
    right: 20%;
    animation-delay: 1.5s;
}

.neural-node:nth-child(5) {
    top: 55%;
    right: 30%;
    background: var(--color-orange);
    box-shadow: 0 0 20px rgba(var(--color-orange-rgb), 0.3);
    animation-delay: 2s;
}

.neural-node:nth-child(6) {
    top: 75%;
    right: 25%;
    background: var(--color-green);
    box-shadow: 0 0 20px rgba(var(--color-green-rgb), 0.3);
    animation-delay: 2.5s;
}

/* Data flow connections */
.neural-connection {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, var(--color-blue), var(--color-orange), var(--color-green));
    animation: dataFlow 3s ease-in-out infinite;
    opacity: 0.6;
}

.neural-connection:nth-child(7) {
    top: 30%;
    left: 20%;
    width: 100px;
    transform: rotate(15deg);
    animation-delay: 0s;
}

.neural-connection:nth-child(8) {
    top: 50%;
    left: 30%;
    width: 80px;
    transform: rotate(-20deg);
    animation-delay: 1s;
}

.neural-connection:nth-child(9) {
    top: 70%;
    left: 25%;
    width: 120px;
    transform: rotate(10deg);
    animation-delay: 2s;
}

/* Floating prompt suggestions */
.prompt-bubble {
    position: absolute;
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--color-blue);
    border-radius: 20px;
    padding: 8px 16px;
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text);
    animation: floatUp 4s ease-in-out infinite;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 150px;
    text-align: center;
}

.prompt-bubble:nth-child(10) {
    top: 20%;
    right: 10%;
    animation-delay: 0s;
    border-color: var(--color-blue);
}

.prompt-bubble:nth-child(11) {
    top: 60%;
    left: 5%;
    animation-delay: 2s;
    border-color: var(--color-orange);
}

.prompt-bubble:nth-child(12) {
    bottom: 25%;
    right: 15%;
    animation-delay: 4s;
    border-color: var(--color-green);
}

/* AI brain visualization */
.ai-brain {
    position: absolute;
    top: 15%;
    right: 10%;
    width: 60px;
    height: 60px;
    background: linear-gradient(45deg, var(--color-blue), var(--color-orange));
    border-radius: 50%;
    animation: brainPulse 3s ease-in-out infinite;
    opacity: 0.1;
}

.ai-brain::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: var(--color-green);
    border-radius: 50%;
    animation: brainPulse 3s ease-in-out infinite reverse;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-16);
    background: linear-gradient(135deg, var(--color-blue), var(--color-orange), var(--color-green));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite;
    position: relative;
    overflow: hidden;
}

.hero-title::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-blue), var(--color-orange), var(--color-green));
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: shimmer 3s ease-in-out infinite reverse;
    opacity: 0.3;
    z-index: -1;
}

/* AI typing cursor effect */
.typing-cursor {
    display: inline-block;
    width: 3px;
    height: 1em;
    background: var(--color-blue);
    margin-left: 2px;
    animation: blink 1s infinite;
    vertical-align: baseline;
}

.hero-subtitle {
    font-size: clamp(1.5rem, 3vw, 2rem);
    color: var(--color-text);
    margin-bottom: var(--space-24);
    font-weight: var(--font-weight-medium);
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-32);
    line-height: 1.7;
}

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

.hero-buttons .btn {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.hero-buttons .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.hero-buttons .btn:hover::before {
    left: 100%;
}

.hero-buttons .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(var(--color-blue-rgb), 0.3);
}

/* Sections */
.section {
    padding: 80px 0;
    position: relative;
}

.section-alt {
    background: var(--color-bg-2);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-16);
    color: var(--color-text);
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Examples Grid */
.examples-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-24);
    margin-top: 40px;
    align-items: start;
}

.example-card {
    transition: all var(--duration-normal) var(--ease-standard);
    border: 1px solid var(--color-card-border);
    position: relative;
    overflow: hidden;
}

.example-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-blue), var(--color-orange), var(--color-green));
}

.example-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.example-icon {
    font-size: var(--font-size-2xl);
    color: var(--color-primary);
    margin-bottom: var(--space-16);
}

.example-text {
    font-size: var(--font-size-base);
    margin-bottom: var(--space-16);
    line-height: 1.6;
}

/* Visual Comparison Section */
.visual-comparison {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-32);
    align-items: center;
    margin: 60px 0;
    padding: var(--space-32);
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.comparison-side {
    text-align: center;
    padding: var(--space-24);
    border-radius: var(--radius-lg);
    transition: all var(--duration-normal) var(--ease-standard);
}

.bad-side {
    background: var(--color-bg-4);
    border: 2px solid rgba(239, 68, 68, 0.2);
}

.good-side {
    background: var(--color-bg-3);
    border: 2px solid rgba(34, 197, 94, 0.2);
}

.comparison-image {
    width: 200px;
    height: 150px;
    margin: 0 auto var(--space-20) auto;
    border-radius: var(--radius-base);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.comparison-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background: white;
}

.comparison-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-12);
}

.comparison-title.bad {
    color: var(--color-error);
}

.comparison-title.good {
    color: var(--color-success);
}

.comparison-description {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.comparison-vs {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-8);
}

.vs-text {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    background: var(--color-surface);
    padding: var(--space-8) var(--space-16);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}

.vs-arrows {
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    animation: pulse 2s infinite;
}

/* Examples Comparison */
.examples-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-32);
    margin-top: 40px;
}

.comparison-column {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-24);
    box-shadow: var(--shadow-sm);
}

.bad-column {
    border-left: 4px solid var(--color-error);
}

.good-column {
    border-left: 4px solid var(--color-success);
}

.examples-header {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--space-20);
    text-align: center;
}

.examples-header.bad {
    color: var(--color-error);
}

.examples-header.good {
    color: var(--color-success);
}

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

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

.example-item.bad {
    background: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.2);
}

.example-item.good {
    background: rgba(34, 197, 94, 0.05);
    border-color: rgba(34, 197, 94, 0.2);
}

.example-prompt {
    font-style: italic;
    font-family: Georgia, serif;
    line-height: 1.6;
    margin-bottom: var(--space-12);
    color: var(--color-text);
}

.example-item.bad .example-prompt {
    font-size: var(--font-size-base);
}

.example-item.good .example-prompt {
    font-size: var(--font-size-sm);
}

/* Structure Grid */
.structure-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-24);
    margin-bottom: 40px;
    align-items: start;
}

.structure-card {
    text-align: center;
    transition: all var(--duration-normal) var(--ease-standard);
    position: relative;
}

.structure-card:hover {
    transform: translateY(-5px);
}

.structure-number {
    width: 60px;
    height: 60px;
    background: var(--color-green);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin: 0 auto var(--space-16) auto;
}

.structure-card h3 {
    margin-bottom: var(--space-8);
    color: var(--color-text);
}

.structure-example {
    margin-top: var(--space-12);
    padding: var(--space-12);
    background: var(--color-bg-1);
    border-radius: var(--radius-base);
    border-left: 3px solid var(--color-primary);
}

.structure-example em {
    font-family: Georgia, serif;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* Example Prompt Card */
.example-prompt-card {
    background: var(--color-bg-3);
    border-radius: var(--radius-lg);
    padding: var(--space-32);
    margin-top: 40px;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.example-prompt-card h3 {
    color: var(--color-text);
    margin-bottom: var(--space-16);
    font-size: var(--font-size-xl);
}

.prompt-example {
    background: var(--color-surface);
    border-radius: var(--radius-base);
    padding: var(--space-20);
    border: 1px solid var(--color-border);
}

.prompt-example p {
    margin-bottom: var(--space-16);
    font-size: var(--font-size-base);
    line-height: 1.7;
}

/* Models Section */
.models-recommendation {
    margin-top: var(--space-16);
    padding: var(--space-16);
    background: var(--color-bg-1);
    border-radius: var(--radius-base);
    border: 2px solid rgba(59, 130, 246, 0.2);
}

.models-recommendation p {
    margin: 0;
    font-size: var(--font-size-lg);
    color: var(--color-text);
}

/* Models Table */
.models-table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    margin-top: var(--space-24);
}

.models-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-surface);
}

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

.models-table th {
    background: var(--color-bg-1);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    position: sticky;
    top: 0;
}

.models-table tr:hover {
    background: var(--color-bg-2);
}

.models-table tr:last-child td {
    border-bottom: none;
}

/* How to Practice Section */
.practice-content {
    max-width: 1000px;
    margin: 0 auto;
}

.practice-bullets {
    margin-bottom: 40px;
}

.practice-list {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    padding: var(--space-32);
    border: 1px solid var(--color-card-border);
    box-shadow: var(--shadow-sm);
}

.practice-list li {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    margin-bottom: var(--space-16);
    color: var(--color-text);
    position: relative;
    padding-left: var(--space-20);
}

.practice-list li:last-child {
    margin-bottom: 0;
}

.practice-list li::before {
    content: '✨';
    position: absolute;
    left: 0;
    top: 0;
    font-size: var(--font-size-base);
}

.practice-highlight {
    margin-bottom: 32px;
}

.practice-highlight .card {
    background: var(--color-bg-1);
    border: 2px solid rgba(59, 130, 246, 0.3);
    text-align: center;
}

.practice-highlight h3 {
    color: var(--color-text);
    margin-bottom: var(--space-16);
    font-size: var(--font-size-xl);
}

.ai-tools-links {
    display: flex;
    gap: var(--space-16);
    justify-content: center;
    flex-wrap: wrap;
    margin: var(--space-24) 0;
}

.practice-message .card {
    background: var(--color-bg-3);
    border: 2px solid rgba(34, 197, 94, 0.3);
    text-align: center;
}

.important-text {
    font-size: var(--font-size-lg);
    color: var(--color-text);
    margin-bottom: var(--space-20);
    line-height: 1.7;
}

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

.encouragement h3 {
    color: var(--color-primary);
    font-size: var(--font-size-2xl);
    margin: 0;
}

/* Topics Grid */
.topics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-24);
    align-items: start;
}

.topic-card {
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-standard);
    border: 1px solid var(--color-card-border);
    position: relative;
    overflow: hidden;
    height: fit-content;
    align-self: start;
}

.topic-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.topic-title {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    margin: 0;
}

.topic-toggle {
    font-size: var(--font-size-lg);
    color: var(--color-primary);
    transition: transform var(--duration-normal) var(--ease-standard);
}

.topic-card.expanded .topic-toggle {
    transform: rotate(180deg);
}

.topic-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-normal) var(--ease-standard);
    margin: 0;
    padding: 0;
}

.topic-card.expanded .topic-content {
    max-height: 1000px;
}

.prompt-item {
    background: var(--color-bg-8);
    border-radius: var(--radius-base);
    padding: var(--space-16);
    margin-bottom: var(--space-12);
    border: 1px solid rgba(8, 145, 178, 0.2);
    position: relative;
}

.prompt-item:last-child {
    margin-bottom: 0;
}

.prompt-text {
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin-bottom: var(--space-12);
    color: var(--color-text);
}

/* Copy Button */
.copy-btn {
    background: var(--color-orange);
    color: var(--color-btn-primary-text);
    border: none;
    padding: var(--space-8) var(--space-16);
    border-radius: var(--radius-base);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-standard);
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    box-shadow: 0 2px 4px rgba(var(--color-orange-rgb), 0.2);
}

.copy-btn:hover {
    background: var(--color-orange-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(var(--color-orange-rgb), 0.3);
}

.copy-btn:active {
    transform: translateY(0);
}

/* Copy Toast */
.copy-toast {
    position: fixed;
    bottom: var(--space-24);
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-success);
    color: white;
    padding: var(--space-12) var(--space-20);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    gap: var(--space-8);
    z-index: 10000;
    transition: all var(--duration-normal) var(--ease-standard);
    opacity: 1;
}

.copy-toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    pointer-events: none;
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 30px;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    margin-bottom: var(--space-16);
}

.footer-brand i {
    font-size: var(--font-size-2xl);
}

.footer-text {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-24);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

.footer-links {
    display: flex;
    gap: var(--space-24);
    justify-content: center;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-standard);
}

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

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

@keyframes gradientShift {
    0%, 100% {
        background: linear-gradient(135deg, 
            rgba(var(--color-blue-rgb), 0.1) 0%, 
            rgba(var(--color-orange-rgb), 0.1) 50%, 
            rgba(var(--color-green-rgb), 0.1) 100%);
    }
    33% {
        background: linear-gradient(135deg, 
            rgba(var(--color-orange-rgb), 0.1) 0%, 
            rgba(var(--color-green-rgb), 0.1) 50%, 
            rgba(var(--color-blue-rgb), 0.1) 100%);
    }
    66% {
        background: linear-gradient(135deg, 
            rgba(var(--color-green-rgb), 0.1) 0%, 
            rgba(var(--color-blue-rgb), 0.1) 50%, 
            rgba(var(--color-orange-rgb), 0.1) 100%);
    }
}

@keyframes floatingBubbles {
    0%, 100% {
        transform: translateY(0px) scale(1);
        opacity: 0.15;
    }
    50% {
        transform: translateY(-20px) scale(1.1);
        opacity: 0.25;
    }
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.1;
    }
    25% {
        transform: translateY(-15px) rotate(90deg);
        opacity: 0.2;
    }
    50% {
        transform: translateY(-30px) rotate(180deg);
        opacity: 0.15;
    }
    75% {
        transform: translateY(-15px) rotate(270deg);
        opacity: 0.2;
    }
}

@keyframes shimmer {
    0% {
        background-position: -200% 0;
    }
    100% {
        background-position: 200% 0;
    }
}

@keyframes dataFlow {
    0%, 100% {
        opacity: 0.3;
        transform: scaleX(0.8);
    }
    50% {
        opacity: 0.8;
        transform: scaleX(1.2);
    }
}

@keyframes floatUp {
    0%, 100% {
        transform: translateY(0px) scale(1);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-20px) scale(1.05);
        opacity: 1;
    }
}

@keyframes brainPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.2;
    }
}

@keyframes typing {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

@keyframes blink {
    0%, 50% {
        border-color: transparent;
    }
    51%, 100% {
        border-color: var(--color-blue);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .nav-menu {
        gap: var(--space-20);
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .visual-comparison {
        grid-template-columns: 1fr;
        gap: var(--space-24);
    }
    
    .comparison-vs {
        flex-direction: row;
        justify-content: center;
    }
    
    .vs-arrows {
        transform: rotate(90deg);
    }
    
    .examples-comparison {
        grid-template-columns: 1fr;
        gap: var(--space-24);
    }
    
    .ai-tools-links {
        flex-direction: column;
        align-items: center;
    }
}

/* Mobile Menu Styles */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
        border-top: 1px solid var(--color-border);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
        flex-direction: column;
        padding: var(--space-20) var(--space-16);
        gap: var(--space-8);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-normal) var(--ease-standard);
        z-index: 999;
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        width: 100%;
        text-align: center;
        padding: var(--space-16) 0;
        font-size: var(--font-size-lg);
        background: transparent;
        border: none;
        margin: 0;
    }
    
    .nav-link:hover {
        color: var(--color-primary);
    }
    
    .nav-link.active {
        color: var(--color-primary);
        font-weight: var(--font-weight-semibold);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .navbar .container {
        padding: var(--space-12) var(--space-16);
        gap: var(--space-16);
    }
    
    .nav-brand {
        margin-left: var(--space-16);
    }
    
    .nav-brand img {
        width: 220px;
        height: 80px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .examples-grid,
    .structure-grid,
    .topics-grid {
        grid-template-columns: 1fr;
    }
    
    .visual-comparison {
        padding: var(--space-20);
        margin: 40px 0;
    }
    
    .comparison-image {
        width: 150px;
        height: 120px;
    }
    
    .models-table-container {
        font-size: var(--font-size-sm);
    }
    
    .models-table th,
    .models-table td {
        padding: var(--space-12);
    }
    
    .ai-tools-links {
        flex-direction: column;
        gap: var(--space-12);
    }
}

@media (max-width: 480px) {
    .navbar .container {
        padding: var(--space-12) var(--space-16);
    }
    
    .hero {
        min-height: 90vh;
        padding: 0 var(--space-16);
    }
    
    .hero-buttons {
        gap: var(--space-12);
    }
    
    .btn--lg {
        padding: var(--space-12) var(--space-24);
        font-size: var(--font-size-base);
    }
    
    .section-header {
        margin-bottom: 40px;
    }
    
    .comparison-image {
        width: 120px;
        height: 100px;
    }
    
    .comparison-title {
        font-size: var(--font-size-lg);
    }
    
    .copy-toast {
        bottom: var(--space-16);
        left: var(--space-16);
        right: var(--space-16);
        transform: none;
    }
    
    .copy-toast.hidden {
        transform: translateY(20px);
    }
}