:root {
  /* Colors */
  --color-background: rgba(252, 252, 249, 1);
  --color-surface: rgba(255, 255, 253, 1);
  --color-text: black;
  --color-text-secondary: rgba(98, 108, 113, 1);
  --color-primary: rgba(33, 128, 141, 1);
  --color-primary-hover: rgb(0, 0, 0);
  --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');
}

: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);

    /* 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;
  }
}

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

/* Tennis-themed Portfolio Styles */
:root {
  /* Tennis-themed colors */
  --tennis-green: #228B22;
  --tennis-light-green: #32CD32;
  --tennis-lighter-green: #90EE90;
  --tennis-white: #FFFFFF;
  --tennis-cream: #F8F8FF;
  --tennis-court-brown: #8B4513;
  --tennis-ball-yellow: #CCFF00;
  --tennis-net-gray: #708090;
  --tennis-dark-green: #006400;
  
  /* Override design system colors with tennis theme */
  --color-primary: var(--tennis-green);
  --color-primary-hover: #1e7a1e;
  --color-primary-active: #1a6b1a;
  --color-secondary: rgba(144, 238, 144, 0.2);
  --color-secondary-hover: rgba(144, 238, 144, 0.3);
  --color-accent: var(--tennis-ball-yellow);
  
  /* 3D Court Variables */
  --court-perspective: 1000px;
  --court-depth: 400px;
  --court-width: 500px;
  --court-height: 300px;
}

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

/* Loading Screen */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  transition: opacity 0.5s ease;
}

.loading-content {
  text-align: center;
  color: var(--tennis-green);
}

.court-setup {
  position: relative;
  width: 200px;
  height: 120px;
  margin: 0 auto 30px;
  perspective: 600px;
}

.court-base {
  width: 100%;
  height: 100%;
  background: var(--tennis-green);
  border-radius: 8px;
  transform: rotateX(45deg) rotateY(10deg);
  animation: courtSetup 2s ease-in-out infinite;
}

.court-lines-setup {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform: rotateX(45deg) rotateY(10deg);
}

.setup-line {
  position: absolute;
  background: white;
  animation: lineSetup 2s ease-in-out infinite;
}

.setup-line-1 {
  width: 100%;
  height: 2px;
  top: 50%;
  left: 0;
  animation-delay: 0.5s;
}

.setup-line-2 {
  width: 2px;
  height: 100%;
  top: 0;
  left: 50%;
  animation-delay: 1s;
}

.setup-line-3 {
  width: 80%;
  height: 2px;
  top: 30%;
  left: 10%;
  animation-delay: 1.5s;
}

.loading-ball {
  position: absolute;
  width: 15px;
  height: 15px;
  background: var(--tennis-ball-yellow);
  border-radius: 50%;
  top: 20px;
  left: 30px;
  animation: loadingBallBounce 1s ease-in-out infinite;
}

.loading-text {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--tennis-green);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  border-bottom: 1px solid var(--color-border);
  transition: all 0.3s ease;
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--color-primary);
}

.tennis-ball {
  width: 35px;
  height: 35px;
  background: var(--tennis-ball-yellow);
  border-radius: 50%;
  position: relative;
  border: 2px solid var(--tennis-white);
}

.tennis-ball::before,
.tennis-ball::after {
  content: '';
  position: absolute;
  width: 70%;
  height: 2px;
  background: var(--tennis-white);
  left: 15%;
  border-radius: 2px;
}

.tennis-ball::before {
  top: 30%;
  transform: rotate(45deg);
}

.tennis-ball::after {
  bottom: 30%;
  transform: rotate(-45deg);
}

.nav__menu {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav__link {
  color: black;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.nav__link:hover,
.nav__link.active-link {
  color: var(--color-primary);
}

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

.nav__toggle {
  display: none;
  cursor: pointer;
}

.hamburger {
  width: 25px;
  height: 3px;
  background: var(--color-primary);
  position: relative;
  transition: all 0.3s ease;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 25px;
  height: 3px;
  background: var(--color-primary);
  transition: all 0.3s ease;
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

/* Home Section */
.home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--tennis-lighter-green) 0%, var(--tennis-white) 100%);
  position: relative;
  overflow: hidden;
}

.home::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 49px,
    rgba(34, 139, 34, 0.1) 50px,
    rgba(34, 139, 34, 0.1) 51px
  );
}

.home__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}

.home__content {
  animation: slideInLeft 1s ease-out;
}

.home__title {
  margin-bottom: 20px;
}

.title-main {
  display: block;
  font-size: 3.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.title-sub {
  display: block;
  font-size: 2rem;
  font-weight: 300;
  color: var(--color-text-secondary);
}

.home__description {
  font-size: 1.2rem;
  margin-bottom: 10px;
  color: var(--color-text);
}

.home__subtitle {
  font-size: 1.1rem;
  margin-bottom: 30px;
  color: var(--color-text-secondary);
  font-style: italic;
}

.home__buttons {
  display: flex;
  gap: 20px;
}

.home__visual {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  animation: slideInRight 1s ease-out;
}

/* 3D Tennis Court */
.tennis-court-3d {
  perspective: var(--court-perspective);
  perspective-origin: 50% 40%;
  width: var(--court-width);
  height: var(--court-height);
  position: relative;
}

.court-container {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  animation: courtRotate 20s linear infinite;
}

.court-surface {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transform: rotateX(60deg) rotateY(5deg);
}

.court-base-3d {
  position: absolute;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--tennis-green) 0%,
    var(--tennis-dark-green) 50%,
    var(--tennis-green) 100%
  );
  border-radius: 12px;
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.2),
    inset 0 -10px 20px rgba(0, 0, 0, 0.1);
  transform: translateZ(-20px);
}

.court-base-3d::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 2px,
    rgba(255, 255, 255, 0.05) 2px,
    rgba(255, 255, 255, 0.05) 4px
  );
  border-radius: 12px;
}

.court-lines-3d {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
}

.court-line-3d {
  position: absolute;
  background: var(--tennis-white);
  border-radius: 1px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transform: translateZ(1px);
  opacity: 0;
  transform-origin: left center;
}

/* Baseline lines */
.baseline-far {
  width: 100%;
  height: 3px;
  top: 10%;
  left: 0;
  animation: drawLineHorizontal 1s ease-out 1s forwards;
}

.baseline-near {
  width: 100%;
  height: 3px;
  bottom: 10%;
  left: 0;
  animation: drawLineHorizontal 1s ease-out 1.2s forwards;
}

/* Service lines */
.service-line-far {
  width: 100%;
  height: 3px;
  top: 35%;
  left: 0;
  animation: drawLineHorizontal 1s ease-out 1.4s forwards;
}

.service-line-near {
  width: 100%;
  height: 3px;
  bottom: 35%;
  left: 0;
  animation: drawLineHorizontal 1s ease-out 1.6s forwards;
}

/* Center line */
.center-line {
  width: 100%;
  height: 3px;
  top: 50%;
  left: 0;
  transform: translateY(-50%) translateZ(1px);
  animation: drawLineHorizontal 1s ease-out 1.8s forwards;
}

/* Sidelines */
.sideline-left {
  width: 3px;
  height: 100%;
  top: 0;
  left: 10%;
  animation: drawLineVertical 1s ease-out 2s forwards;
}

.sideline-right {
  width: 3px;
  height: 100%;
  top: 0;
  right: 10%;
  animation: drawLineVertical 1s ease-out 2.2s forwards;
}

/* Center service line */
.center-service-line {
  width: 3px;
  height: 30%;
  top: 35%;
  left: 50%;
  transform: translateX(-50%) translateZ(1px);
  animation: drawLineVertical 1s ease-out 2.4s forwards;
}

/* Tennis Net */
.tennis-net-3d {
  position: absolute;
  top: 48%;
  left: 10%;
  width: 80%;
  height: 4%;
  transform: translateZ(15px);
  animation: netAppear 1s ease-out 2.6s forwards;
  opacity: 0;
}

.net-posts {
  position: absolute;
  top: -15px;
  left: 0;
  width: 100%;
  height: 30px;
  display: flex;
  justify-content: space-between;
}

.net-post {
  width: 4px;
  height: 100%;
  background: var(--tennis-net-gray);
  border-radius: 2px;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.net-mesh {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(112, 128, 144, 0.8) 50%,
    transparent 100%
  );
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Tennis Ball 3D */
.tennis-ball-3d {
  position: absolute;
  width: 25px;
  height: 25px;
  background: var(--tennis-ball-yellow);
  border-radius: 50%;
  top: 40%;
  left: 30%;
  transform: translateZ(30px);
  box-shadow: 
    0 10px 20px rgba(0, 0, 0, 0.3),
    inset -5px -5px 10px rgba(0, 0, 0, 0.2);
  animation: ballPhysics 4s ease-in-out infinite;
  opacity: 0;
}

.tennis-ball-3d::before,
.tennis-ball-3d::after {
  content: '';
  position: absolute;
  width: 70%;
  height: 2px;
  background: var(--tennis-white);
  left: 15%;
  border-radius: 2px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.tennis-ball-3d::before {
  top: 30%;
  transform: rotate(45deg);
}

.tennis-ball-3d::after {
  bottom: 30%;
  transform: rotate(-45deg);
}

.ball-shadow {
  position: absolute;
  width: 35px;
  height: 15px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  bottom: -40px;
  left: -5px;
  transform: translateZ(-25px);
  animation: shadowPhysics 4s ease-in-out infinite;
}

/* 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);
}

.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);
}

/* Section Headers */
.section__header {
  text-align: center;
  margin-bottom: 60px;
}

.section__title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 15px;
}

.section__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  background: var(--color-surface);
}

.about__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.about__info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.about__card {
  background: var(--tennis-white);
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.about__card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.card__icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.card__title {
  font-size: 1.3rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.card__description {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.about__text h3 {
  font-size: 1.8rem;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.about__text p {
  margin-bottom: 20px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.achievements {
  display: flex;
  gap: 30px;
  margin-top: 30px;
}

.achievement {
  text-align: center;
  padding: 20px;
  background: var(--tennis-lighter-green);
  border-radius: var(--radius-md);
  border: 1px solid var(--tennis-light-green);
}

.achievement__number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
}

.achievement__label {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

/* Projects Section */
.projects {
  background: var(--color-background);
}

.projects__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
}

.project-card {
  background: var(--tennis-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.project-card__header {
  padding: 20px;
  background: linear-gradient(135deg, var(--tennis-green), var(--tennis-light-green));
  color: var(--tennis-white);
  position: relative;
}

.match-status {
  display: inline-block;
  padding: 5px 15px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 10px;
}

.project-card__title {
  font-size: 1.4rem;
  font-weight: 600;
  margin: 0;
}

.project-card__content {
  padding: 25px;
}

.project-card__description {
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.project-card__tech {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tech-tag {
  padding: 6px 12px;
  background: var(--tennis-lighter-green);
  color: var(--color-primary);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
}

.project-card__footer {
  padding: 0 25px 25px;
}

/* Skills Section */
.skills {
  background: var(--color-surface);
}

.skills__content {
  display: grid;
  gap: 40px;
}

.skills__category {
  background: var(--tennis-white);
  padding: 30px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.skills__category-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 25px;
  text-align: center;
}

.skills__grid {
  display: grid;
  gap: 20px;
}

.skill-item {
  padding: 15px;
  background: var(--color-background);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-border);
}

.skill-item__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.skill-item__name {
  font-weight: 600;
  color: var(--color-text);
}

.skill-item__level {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  font-weight: 500;
}

.skill-item__bar {
  height: 8px;
  background: var(--color-secondary);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.skill-item__progress {
  height: 100%;
  background: linear-gradient(90deg, var(--tennis-green), var(--tennis-light-green));
  border-radius: var(--radius-sm);
  transition: width 1s ease;
}

.skills__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.skill-tag {
  padding: 10px 20px;
  background: var(--tennis-lighter-green);
  color: var(--color-primary);
  border-radius: var(--radius-base);
  font-weight: 500;
  transition: transform 0.3s ease;
}

.skill-tag:hover {
  transform: translateY(-3px);
}

/* Contact Section */
.contact {
  background: var(--color-background);
}

.contact__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact__info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.contact__card {
  background: var(--tennis-white);
  padding: 25px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  text-align: center;
  transition: transform 0.3s ease;
}

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

.contact__icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

.contact__title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.contact__description {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

.contact__form {
  background: var(--tennis-white);
  padding: 40px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.form__title {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 30px;
  text-align: center;
}

.form__group {
  margin-bottom: 25px;
}

.form__input {
  width: 100%;
  padding: 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-base);
  font-size: 1rem;
  font-family: inherit;
  background: var(--color-background);
  color: var(--color-text);
  transition: border-color 0.3s ease;
}

.form__input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form__input::placeholder {
  color: var(--color-text-secondary);
}

/* Footer */
.footer {
  background: var(--color-primary);
  color: var(--tennis-white);
  padding: 40px 0 20px;
}

.footer__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  margin-bottom: 30px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 15px;
}

.footer__description {
  color: rgba(255, 255, 255, 0.8);
  max-width: 400px;
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.footer__links {
  display: flex;
  gap: 20px;
}

.footer__links a {
  color: var(--tennis-white);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.footer__links a:hover {
  opacity: 0.8;
}

/* Animations */
@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes courtSetup {
  0%, 100% {
    transform: rotateX(45deg) rotateY(10deg);
  }
  50% {
    transform: rotateX(45deg) rotateY(-10deg);
  }
}

@keyframes lineSetup {
  0% {
    opacity: 0;
    transform: scaleX(0);
  }
  100% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes loadingBallBounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes courtRotate {
  0% {
    transform: rotateY(0deg);
  }
  100% {
    transform: rotateY(360deg);
  }
}

@keyframes drawLineHorizontal {
  0% {
    opacity: 0;
    transform: scaleX(0) translateZ(1px);
  }
  100% {
    opacity: 1;
    transform: scaleX(1) translateZ(1px);
  }
}

@keyframes drawLineVertical {
  0% {
    opacity: 0;
    transform: scaleY(0) translateZ(1px);
  }
  100% {
    opacity: 1;
    transform: scaleY(1) translateZ(1px);
  }
}

@keyframes netAppear {
  0% {
    opacity: 0;
    transform: translateZ(15px) scale(0.8);
  }
  100% {
    opacity: 1;
    transform: translateZ(15px) scale(1);
  }
}

@keyframes ballPhysics {
  0% {
    opacity: 1;
    transform: translateZ(30px) translateY(0px) translateX(0px);
  }
  25% {
    transform: translateZ(30px) translateY(-30px) translateX(50px);
  }
  50% {
    transform: translateZ(30px) translateY(0px) translateX(100px);
  }
  75% {
    transform: translateZ(30px) translateY(-20px) translateX(150px);
  }
  100% {
    transform: translateZ(30px) translateY(0px) translateX(200px);
  }
}

@keyframes shadowPhysics {
  0% {
    opacity: 0.3;
    transform: translateZ(-25px) scale(1);
  }
  25% {
    opacity: 0.1;
    transform: translateZ(-25px) scale(0.7);
  }
  50% {
    opacity: 0.3;
    transform: translateZ(-25px) scale(1);
  }
  75% {
    opacity: 0.15;
    transform: translateZ(-25px) scale(0.8);
  }
  100% {
    opacity: 0.3;
    transform: translateZ(-25px) scale(1);
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: var(--tennis-white);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    transition: left 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  }

  .nav__menu.show-menu {
    left: 0;
  }

  .nav__toggle {
    display: block;
  }

  .home__container {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

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

  .title-sub {
    font-size: 1.5rem;
  }

  .home__buttons {
    justify-content: center;
  }

  .tennis-court-3d {
    width: 350px;
    height: 220px;
  }

  .about__content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .achievements {
    flex-direction: column;
    gap: 15px;
  }

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

  .contact__content {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .footer__bottom {
    flex-direction: column;
    gap: 15px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }

  .section {
    padding: 60px 0;
  }

  .section__title {
    font-size: 2rem;
  }

  .tennis-court-3d {
    width: 280px;
    height: 180px;
  }

  .court-container {
    animation: none;
  }
}

/* Hamburger menu animation */
.hamburger.active {
  background: transparent;
}

.hamburger.active::before {
  transform: rotate(45deg);
  top: 0;
}

.hamburger.active::after {
  transform: rotate(-45deg);
  top: 0;
}

/* 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);
}

.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);
}

.block {
  display: block;
}
.hidden {
  display: none;
}

.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;
}