: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://r2cdn.perplexity.ai/fonts/FKGroteskNeue.woff2')
    format('woff2');
}

/* END PERPLEXITY DESIGN SYSTEM */
:root {
  /* Orange Color Scheme */
  --color-primary: #FF6B35;
  --color-primary-hover: #E55A2B;
  --color-primary-active: #CC4F24;
  --color-primary-light: #FFA366;
  --color-primary-lighter: #FFE4D6;
  
  /* Base Colors */
  --color-background: #FEFEFE;
  --color-surface: #FFFFFF;
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-text-light: #999999;
  --color-border: #E0E0E0;
  --color-border-light: #F0F0F0;
  
  /* Status Colors */
  --color-success: #28A745;
  --color-error: #DC3545;
  --color-warning: #FFC107;
  --color-info: #17A2B8;
  
  /* Typography */
  --font-family-base: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;
  --font-size-4xl: 40px;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-bold: 700;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-tooltip: 1050;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
  :root {
    --color-background: #1a1a1a;
    --color-surface: #2d2d2d;
    --color-text: #f5f5f5;
    --color-text-secondary: #cccccc;
    --color-text-light: #999999;
    --color-border: #444444;
    --color-border-light: #333333;
  }
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  overflow-x: hidden;
}

/* Animated background particles */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 80%, rgba(255, 107, 53, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
  animation: backgroundFloat 20s ease-in-out infinite;
}

@keyframes backgroundFloat {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(180deg); }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-text);
  margin-bottom: var(--space-md);
}

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-base); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Utility Classes */
.hidden {
  display: none !important;
}

.sr-only {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width var(--transition-normal), height var(--transition-normal);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

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

.btn--outline {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn--outline:hover {
  background: var(--color-primary);
  color: white;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--full-width {
  width: 100%;
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  margin-bottom: var(--space-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

.form-control {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

/* Navigation */
.navbar {
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
  position: fixed;  
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-fixed);
  transition: all var(--transition-fast);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
}

.nav-brand h2 {
  color: var(--color-primary);
  margin: 0;
  font-size: var(--font-size-xl);
}

.nav-menu {
  display: flex;
  list-style: none;
  align-items: center;
  gap: var(--space-lg);
}

.nav-link {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

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

.nav-dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: var(--space-sm) 0;
  min-width: 200px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  padding: var(--space-xs) var(--space-md);
}

.dropdown-menu .nav-link {
  display: block;
  padding: var(--space-xs) 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  gap: 4px;
  background: none;
  border: none;
  padding: var(--space-xs);
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--color-text);
  transition: all var(--transition-fast);
}

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

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

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* Sections */
.section {
  padding: var(--space-3xl) 0;
  opacity: 0;
  transform: translateY(50px);
  transition: all var(--transition-slow);
  display: none;
}

.section.active {
  opacity: 1;
  transform: translateY(0);
  display: block;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  position: relative;
}

.section-header h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 50px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary-lighter) 0%, var(--color-primary-light) 100%);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('https://user-gen-media-assets.s3.amazonaws.com/gpt4o_images/992fa59b-112f-4309-a9f6-7b7b04d37043.png') center/cover;
  opacity: 0.1;
  animation: heroFloat 15s ease-in-out infinite;
}

@keyframes heroFloat {
  0%, 100% { transform: scale(1) rotate(0deg); }
  50% { transform: scale(1.05) rotate(1deg); }
}

.hero-content {
  text-align: center;
  z-index: 1;
  animation: slideInUp 1s ease-out;
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-title {
  font-size: var(--font-size-4xl);
  color: var(--color-text);
  margin-bottom: var(--space-md);
  animation: fadeInUp 1s ease-out 0.3s both;
}

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

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-xl);
  animation: fadeInUp 1s ease-out 0.6s both;
}

.hero-buttons {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  animation: fadeInUp 1s ease-out 0.9s both;
}

/* About Section */
.about-section {
  margin-bottom: var(--space-3xl);
}

.about-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-text p {
  font-size: var(--font-size-lg);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

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

.stat-item {
  text-align: center;
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-5px);
}

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

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

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.feature-card {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border-light);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
}

.testimonial-card {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: transform var(--transition-fast);
}

.testimonial-card:hover {
  transform: scale(1.05);
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: -20px;
  left: var(--space-lg);
  font-size: 4rem;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.testimonial-content {
  margin-bottom: var(--space-lg);
  font-style: italic;
  color: var(--color-text-secondary);
}

.testimonial-author strong {
  color: var(--color-primary);
}

.testimonial-author span {
  display: block;
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* Tutors Section */
.tutors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.tutor-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-fast);
}

.tutor-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.tutor-card.main-tutor {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-xl);
}

.tutor-image {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
  background: linear-gradient(135deg, var(--color-primary-lighter), var(--color-primary-light));
}

.tutor-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--color-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

.tutor-info {
  padding: var(--space-xl);
}

.tutor-info h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.tutor-title {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
  font-weight: var(--font-weight-medium);
}

.tutor-details p {
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

/* Courses Section */
.courses-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.course-card {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  text-align: center;
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border-light);
  cursor: pointer;
}

.course-card:hover,
.course-card:focus {
  transform: translateY(-10px) rotateY(5deg);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary);
  outline: none;
}

.course-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  animation: rotate 4s linear infinite;
}

@keyframes rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

.course-price {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin: var(--space-md) 0;
}

/* Course Details */
.course-detail {
  background: var(--color-surface);
}

.course-detail-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.course-detail-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.course-info ul {
  list-style: none;
  padding: 0;
}

.course-info li {
  padding: var(--space-sm) 0;
  position: relative;
  padding-left: var(--space-lg);
}

.course-info li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

.schedule-table {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.schedule-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--space-md);
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.schedule-row:last-child {
  border-bottom: none;
}

.schedule-row:nth-child(even) {
  background: var(--color-primary-lighter);
}

.pricing-card {
  background: var(--color-primary-lighter);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-md);
}

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

.price-details {
  color: var(--color-text-secondary);
}

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

.module-card {
  background: var(--color-primary-lighter);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  text-align: center;
  transition: transform var(--transition-fast);
}

.module-card:hover {
  transform: scale(1.05);
}

.module-card h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

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

.benefit-item {
  background: var(--color-surface);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.benefit-item:hover {
  transform: translateY(-5px);
}

.benefit-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

/* Blog Section */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-lg);
}

.blog-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
  cursor: pointer;
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
}

.blog-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
}

.blog-date {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-sm);
}

.blog-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  cursor: pointer;
}

.blog-category {
  display: inline-block;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  margin-top: var(--space-md);
}

/* Blog Modal */
.blog-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.blog-modal.show {
  opacity: 1;
  visibility: visible;
}

.blog-modal-content {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
  transform: scale(0.8);
  transition: transform var(--transition-normal);
}

.blog-modal.show .blog-modal-content {
  transform: scale(1);
}

.blog-modal-close {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: none;
  border: none;
  font-size: var(--font-size-2xl);
  color: var(--color-text-light);
  cursor: pointer;
  padding: var(--space-xs);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.blog-modal-close:hover {
  background: var(--color-border-light);
  color: var(--color-text);
}

.blog-modal-body {
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.blog-modal-body ul,
.blog-modal-body ol {
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.blog-modal-body li {
  margin-bottom: var(--space-xs);
}

.blog-modal-body strong {
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
}

.blog-modal-body em {
  color: var(--color-primary);
  font-style: italic;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

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

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-fast);
}

.contact-item:hover {
  transform: translateX(10px);
}

.contact-icon {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
}

.contact-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.contact-form {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-lg);
}

/* Footer */
.footer {
  background: var(--color-text);
  color: var(--color-surface);
  padding: var(--space-3xl) 0 var(--space-lg);
}

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

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

.footer-section ul {
  list-style: none;
  padding: 0;
}

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

.footer-section a {
  color: var(--color-surface);
  transition: color var(--transition-fast);
}

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

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

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 50px;
  height: 50px;
  background: var(--color-primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-fixed);
  box-shadow: var(--shadow-md);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background: var(--color-primary-hover);
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: 0 var(--space-sm);
  }
  
  .nav-menu {
    position: fixed;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-lg) 0;
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;Z-INDEX: 999;
    position: ABSOLUTE;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .dropdown-menu {
    position: static;
    box-shadow: none;
    background: var(--color-primary-lighter);
    margin-top: var(--space-sm);
    opacity: 1;
    visibility: visible;
    transform: none;
  }
  
  .hero-title {
    font-size: var(--font-size-2xl);
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .about-stats {
    flex-direction: row;
    justify-content: space-between;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  .tutors-grid {
    grid-template-columns: 1fr;
  }
  
  .tutor-card.main-tutor {
    grid-template-columns: 1fr;
  }
  
  .courses-grid {
    grid-template-columns: 1fr;
  }
  
  .course-detail-content {
    grid-template-columns: 1fr;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
  }
  
  .schedule-row {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .modules-grid {
    grid-template-columns: 1fr;
  }
  
  .benefits-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-grid {
    grid-template-columns: 1fr;
  }
  
  .blog-modal-content {
    max-width: 95vw;
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: var(--font-size-xl);
  }
  
  .about-stats {
    flex-direction: column;
  }
  
  .stat-item {
    text-align: left;
  }
  
  .stat-number {
    font-size: var(--font-size-2xl);
  }
}

/* Animation classes for scroll animations */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: all var(--transition-slow);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.slide-in-left {
  opacity: 0;
  transform: translateX(-50px);
  transition: all var(--transition-slow);
}

.slide-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.slide-in-right {
  opacity: 0;
  transform: translateX(50px);
  transition: all var(--transition-slow);
}

.slide-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* Animation delays for staggered effects */
.feature-card:nth-child(1) { animation-delay: 0.1s; }
.feature-card:nth-child(2) { animation-delay: 0.2s; }
.feature-card:nth-child(3) { animation-delay: 0.3s; }
.feature-card:nth-child(4) { animation-delay: 0.4s; }
.feature-card:nth-child(5) { animation-delay: 0.5s; }
.feature-card:nth-child(6) { animation-delay: 0.6s; }

.testimonial-card:nth-child(1) { animation-delay: 0.1s; }
.testimonial-card:nth-child(2) { animation-delay: 0.2s; }
.testimonial-card:nth-child(3) { animation-delay: 0.3s; }

.course-card:nth-child(1) { animation-delay: 0.1s; }
.course-card:nth-child(2) { animation-delay: 0.2s; }
.course-card:nth-child(3) { animation-delay: 0.3s; }
.course-card:nth-child(4) { animation-delay: 0.4s; }

.blog-card:nth-child(1) { animation-delay: 0.1s; }
.blog-card:nth-child(2) { animation-delay: 0.2s; }
.blog-card:nth-child(3) { animation-delay: 0.3s; }
.blog-card:nth-child(4) { animation-delay: 0.4s; }
.blog-card:nth-child(5) { animation-delay: 0.5s; }
.blog-card:nth-child(6) { animation-delay: 0.6s; }

/* Print styles */
@media print {
  .navbar,
  .back-to-top,
  .blog-modal {
    display: none;
  }
  
  .section {
    page-break-inside: avoid;
  }
  
  .hero {
    min-height: auto;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-primary: #CC4F00;
    --color-border: #000000;
    --color-text: #000000;
    --color-background: #FFFFFF;
  }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .hero-bg {
    animation: none;
  }
  
  .feature-icon {
    animation: none;
  }
  
  .tutor-avatar {
    animation: none;
  }
  
  .course-icon {
    animation: none;
  }
}