:root {
  /* Primitive Color Tokens */
  --color-white: rgba(255, 255, 255, 1);
  --color-black: rgba(0, 0, 0, 1);
  --color-cream-50: rgba(252, 252, 249, 1);
  --color-cream-100: rgba(255, 255, 253, 1);
  --color-gray-200: rgba(245, 245, 245, 1);
  --color-gray-300: rgba(167, 169, 169, 1);
  --color-gray-400: rgba(119, 124, 124, 1);
  --color-slate-500: rgba(98,108,113, 0.92);
  --color-brown-600: rgba(94, 82, 64, 1);
  --color-charcoal-700: rgba(31, 33, 33, 1);
  --color-charcoal-800: rgba(38, 40, 40, 1);
  --color-slate-900: rgba(19, 52, 59, 1);
  --color-teal-300: rgba(50, 184, 198, 1);
  --color-teal-400: rgba(45, 166, 178, 1);
  --color-teal-500: rgba(33, 128, 141, 1);
  --color-teal-600: rgba(29, 116, 128, 1);
  --color-teal-700: rgba(26, 104, 115, 1);
  --color-teal-800: rgba(41, 150, 161, 1);
  --color-red-400: rgba(255, 84, 89, 1);
  --color-red-500: rgba(192, 21, 47, 1);
  --color-orange-400: rgba(230, 129, 97, 1);
  --color-orange-500: rgba(168, 75, 47, 1);

  /* RGB versions for opacity control */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;
  --color-slate-500-rgb: 98, 108, 113;
  --color-red-500-rgb: 192, 21, 47;
  --color-red-400-rgb: 255, 84, 89;
  --color-orange-500-rgb: 168, 75, 47;
  --color-orange-400-rgb: 230, 129, 97;

  /* Background color tokens (Light Mode) */
  --color-bg-1: rgba(59, 130, 246, 0.08); /* Light blue */
  --color-bg-2: rgba(245, 158, 11, 0.08); /* Light yellow */
  --color-bg-3: rgba(34, 197, 94, 0.08); /* Light green */
  --color-bg-4: rgba(239, 68, 68, 0.08); /* Light red */
  --color-bg-5: rgba(147, 51, 234, 0.08); /* Light purple */
  --color-bg-6: rgba(249, 115, 22, 0.08); /* Light orange */
  --color-bg-7: rgba(236, 72, 153, 0.08); /* Light pink */
  --color-bg-8: rgba(6, 182, 212, 0.08); /* Light cyan */

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);
  --color-select-caret: rgba(var(--color-slate-900-rgb), 0.8);

  /* Common style patterns */
  --focus-ring: 0 0 0 3px var(--color-focus-ring);
  --focus-outline: 2px solid var(--color-primary);
  --status-bg-opacity: 0.15;
  --status-border-opacity: 0.25;
  --select-caret-light: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23134252' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  --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: 15px;
  --font-size-md: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 20px;
  --font-size-3xl: 22px;
  --font-size-4xl: 28px;
  --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;

  --nav-h: 84px;
  --hero-gap: clamp(56px, 6vw, 180px);
}

/* Dark mode colors */
@media (prefers-color-scheme: dark) {
  :root {
    /* RGB versions for opacity control (Dark Mode) */
    --color-gray-400-rgb: 119, 124, 124;
    --color-teal-300-rgb: 50, 184, 198;
    --color-gray-300-rgb: 167, 169, 169;
    --color-gray-200-rgb: 245, 245, 245;

    /* Background color tokens (Dark Mode) */
    --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
    --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
    --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
    --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
    --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
    --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
    --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
    --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

    /* Semantic Color Tokens (Dark Mode) */
    --color-background: var(--color-charcoal-700);
    --color-surface: var(--color-charcoal-800);
    --color-text: var(--color-gray-200);
    --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
    --color-primary: var(--color-teal-300);
    --color-primary-hover: var(--color-teal-400);
    --color-primary-active: var(--color-teal-800);
    --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
    --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
    --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
    --color-border: rgba(var(--color-gray-400-rgb), 0.3);
    --color-error: var(--color-red-400);
    --color-success: var(--color-teal-300);
    --color-warning: var(--color-orange-400);
    --color-info: var(--color-gray-300);
    --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
    --color-btn-primary-text: var(--color-slate-900);
    --color-card-border: rgba(var(--color-gray-400-rgb), 0.2);
    --color-card-border-inner: rgba(var(--color-gray-400-rgb), 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(var(--color-gray-400-rgb), 0.2);
    --color-border-secondary: rgba(var(--color-gray-400-rgb), 0.2);
    --color-select-caret: rgba(var(--color-gray-200-rgb), 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: var(--color-teal-300-rgb);
    --color-error-rgb: var(--color-red-400-rgb);
    --color-warning-rgb: var(--color-orange-400-rgb);
    --color-info-rgb: var(--color-gray-300-rgb);
  }
}

/* Data attribute for manual theme switching */
[data-color-scheme="dark"] {
  /* RGB versions for opacity control (dark mode) */
  --color-gray-400-rgb: 119, 124, 124;
  --color-teal-300-rgb: 50, 184, 198;
  --color-gray-300-rgb: 167, 169, 169;
  --color-gray-200-rgb: 245, 245, 245;

  /* Colorful background palette - Dark Mode */
  --color-bg-1: rgba(29, 78, 216, 0.15); /* Dark blue */
  --color-bg-2: rgba(180, 83, 9, 0.15); /* Dark yellow */
  --color-bg-3: rgba(21, 128, 61, 0.15); /* Dark green */
  --color-bg-4: rgba(185, 28, 28, 0.15); /* Dark red */
  --color-bg-5: rgba(107, 33, 168, 0.15); /* Dark purple */
  --color-bg-6: rgba(194, 65, 12, 0.15); /* Dark orange */
  --color-bg-7: rgba(190, 24, 93, 0.15); /* Dark pink */
  --color-bg-8: rgba(8, 145, 178, 0.15); /* Dark cyan */

  /* Semantic Color Tokens (Dark Mode) */
  --color-background: var(--color-charcoal-700);
  --color-surface: var(--color-charcoal-800);
  --color-text: var(--color-gray-200);
  --color-text-secondary: rgba(var(--color-gray-300-rgb), 0.7);
  --color-primary: var(--color-teal-300);
  --color-primary-hover: var(--color-teal-400);
  --color-primary-active: var(--color-teal-800);
  --color-secondary: rgba(var(--color-gray-400-rgb), 0.15);
  --color-secondary-hover: rgba(var(--color-gray-400-rgb), 0.25);
  --color-secondary-active: rgba(var(--color-gray-400-rgb), 0.3);
  --color-border: rgba(var(--color-gray-400-rgb), 0.3);
  --color-error: var(--color-red-400);
  --color-success: var(--color-teal-300);
  --color-warning: var(--color-orange-400);
  --color-info: var(--color-gray-300);
  --color-focus-ring: rgba(var(--color-teal-300-rgb), 0.4);
  --color-btn-primary-text: var(--color-slate-900);
  --color-card-border: rgba(var(--color-gray-400-rgb), 0.15);
  --color-card-border-inner: rgba(var(--color-gray-400-rgb), 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(var(--color-gray-400-rgb), 0.2);
  --color-select-caret: rgba(var(--color-gray-200-rgb), 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: var(--color-teal-300-rgb);
  --color-error-rgb: var(--color-red-400-rgb);
  --color-warning-rgb: var(--color-orange-400-rgb);
  --color-info-rgb: var(--color-gray-300-rgb);
}

[data-color-scheme="light"] {
  /* RGB versions for opacity control (light mode) */
  --color-brown-600-rgb: 94, 82, 64;
  --color-teal-500-rgb: 33, 128, 141;
  --color-slate-900-rgb: 19, 52, 59;

  /* Semantic Color Tokens (Light Mode) */
  --color-background: var(--color-cream-50);
  --color-surface: var(--color-cream-100);
  --color-text: var(--color-slate-900);
  --color-text-secondary: var(--color-slate-500);
  --color-primary: var(--color-teal-500);
  --color-primary-hover: var(--color-teal-600);
  --color-primary-active: var(--color-teal-700);
  --color-secondary: rgba(var(--color-brown-600-rgb), 0.12);
  --color-secondary-hover: rgba(var(--color-brown-600-rgb), 0.2);
  --color-secondary-active: rgba(var(--color-brown-600-rgb), 0.25);
  --color-border: rgba(var(--color-brown-600-rgb), 0.2);
  --color-btn-primary-text: var(--color-cream-50);
  --color-card-border: rgba(var(--color-brown-600-rgb), 0.12);
  --color-card-border-inner: rgba(var(--color-brown-600-rgb), 0.12);
  --color-error: var(--color-red-500);
  --color-success: var(--color-teal-500);
  --color-warning: var(--color-orange-500);
  --color-info: var(--color-slate-500);
  --color-focus-ring: rgba(var(--color-teal-500-rgb), 0.4);

  /* RGB versions for light mode */
  --color-success-rgb: var(--color-teal-500-rgb);
  --color-error-rgb: var(--color-red-500-rgb);
  --color-warning-rgb: var(--color-orange-500-rgb);
  --color-info-rgb: var(--color-slate-500-rgb);
}

/* 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;
  gap: var(--space-8);
  padding: var(--space-12) var(--space-28);
  min-height: 52px;
  border-radius: 999px;
  font-size: var(--font-size-md);
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-standard);
  border: none;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  letter-spacing: 0.01em;
  background: transparent;
  color: var(--color-text);
  isolation: isolate;
  box-shadow: 0 16px 32px rgba(17, 45, 54, 0.08);
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(
    120% 120% at 10% 10%,
    rgba(255, 255, 255, 0.35),
    rgba(255, 255, 255, 0.05) 55%,
    transparent 70%
  );
  opacity: 0;
  transition: opacity var(--duration-fast) var(--ease-standard);
  pointer-events: none;
}

.btn:hover::after {
  opacity: 1;
}

.btn i,
.btn span {
  position: relative;
  z-index: 1;
}

.btn i {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 999px;
  font-size: 1.05rem;
  background: rgba(255, 255, 255, 0.14);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 6px 18px rgba(12, 52, 64, 0.18);
}

.btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}


.btn-primary {
  color: var(--color-btn-primary-text);
  background: linear-gradient(135deg, rgba(50, 184, 202, 0.98), rgba(18, 86, 103, 0.98));
  box-shadow: 0 22px 45px rgba(33, 128, 141, 0.38);
}

.btn-primary:hover {
  background: linear-gradient(135deg, rgba(74, 206, 221, 1), rgba(20, 110, 128, 0.98));
  box-shadow: 0 26px 54px rgba(33, 128, 141, 0.45);
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 10px 26px rgba(33, 128, 141, 0.34);
}

.btn-primary .btn-depth {
  background: linear-gradient(135deg, rgba(7, 39, 48, 0.35), rgba(18, 86, 103, 0.2));
}

.btn-primary i {
  background: rgba(255, 255, 255, 0.18);
  color: var(--color-btn-primary-text);
}

.btn-secondary {
  color: #1a4653;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.92), rgba(198, 240, 245, 0.55));
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: 0 18px 40px rgba(26, 70, 82, 0.18);
  backdrop-filter: blur(18px) saturate(140%);
}

.btn-secondary:hover {
  color: #15404d;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.98), rgba(214, 248, 251, 0.65));
  border-color: rgba(255, 255, 255, 0.65);
  box-shadow: 0 22px 48px rgba(26, 70, 82, 0.24);
}

.btn-secondary:active {
  transform: translateY(1px);
  box-shadow: 0 12px 26px rgba(26, 70, 82, 0.2);
}

.btn-secondary .btn-depth {
  background: linear-gradient(135deg, rgba(15, 73, 87, 0.16), rgba(255, 255, 255, 0.05));
}

.btn-secondary i {
  background: rgba(33, 128, 141, 0.16);
  color: #1b4d59;
}

.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 */
/* MODERN PORTFOLIO 3D - ULTRA MINIMALIST WHITE LIQUID GLASS THEME */

/* CSS RESET & BASE STYLES */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: var(--font-size-base);
  font-family: var(--font-family-base);
  line-height: var(--line-height-normal);
  background: #ffffff;
  color: #1a2e3b;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  background: #ffffff;
  overflow-x: hidden;
  transform-style: preserve-3d;
  perspective: 1000px;
}

/* 3D PERSPECTIVE CONTAINERS */
.perspective-container {
  transform-style: preserve-3d;
  perspective: 1200px;
}

.section-3d {
  transform-style: preserve-3d;
  will-change: transform;
  padding: 100px 0;
}

/* ULTRA-MODERN LIQUID GLASS EFFECTS */
.glass-effect-3d {
  backdrop-filter: blur(18px) saturate(180%);
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(0, 0, 0, 0.06);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.05);
}

.glass-card-3d {
  backdrop-filter: blur(14px) saturate(160%);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(0, 0, 0, 0.06);
  border-radius: 20px;            /* 24 -> 20 per coerenza con bottoni */
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.06);
}

.glass-card-3d:hover {
  transform: translateY(-8px) translateZ(18px) rotateX(1deg);
  box-shadow: 0 24px 56px rgba(0, 0, 0, 0.08);
  border-color: rgba(33, 128, 141, 0.18);
}

.glass-card-3d::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.4), 
    transparent);
  transition: left 0.8s ease;
  pointer-events: none;
  z-index: 1;
}

.glass-card-3d:hover::before {
  left: 100%;
}

/* MODERN 3D BUTTONS */
.glass-button-3d {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.05));
  backdrop-filter: blur(20px) saturate(160%);
  color: #123038;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.23, 1, 0.32, 1);
  overflow: hidden;
  box-shadow: inset 0 0 12px rgba(255,255,255,0.25), 0 8px 25px rgba(33,128,141,0.18);
}

.glass-button-3d span {
  position: relative;
  z-index: 2;
}

.glass-button-3d i {
  font-size: 1rem;
  background: rgba(33,128,141,0.18);
  padding: 8px;
  border-radius: 50%;
  color: #21808d;
  box-shadow: inset 0 0 6px rgba(255,255,255,0.3);
}

.glass-button-3d::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(120deg, transparent, rgba(255,255,255,0.5), transparent);
  transform: rotate(25deg) translateX(-100%);
  transition: transform 0.6s ease;
  z-index: 1;
}



.glass-button-3d.btn-primary {
  border: 1px solid rgba(33,128,141,0.5);
  background: linear-gradient(135deg, rgba(33,128,141,0.8), rgba(50,184,198,0.7));
  color: #fff;
  text-shadow: 0 1px 3px rgba(0,0,0,0.3);
}

.glass-button-3d.btn-primary:hover {
  background: linear-gradient(135deg, rgba(50,184,198,0.9), rgba(26,104,115,0.9));
}

.glass-button-3d.btn-secondary {
  border: 1px solid rgba(200,200,200,0.35);
  background: linear-gradient(135deg, rgba(255,255,255,0.35), rgba(200,240,245,0.15));
  color: #1a2e3b;
}

.glass-button-3d.btn-secondary:hover {
  background: linear-gradient(135deg, rgba(255,255,255,0.55), rgba(198,240,245,0.28));
  color: #21808d;
}

/* ULTRA-MODERN NAVIGATION */
.nav {
  position: fixed;
  height: var(--nav-h);
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0px 0;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.nav.scrolled {
  backdrop-filter: blur(30px) saturate(200%);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(200, 200, 200, 0.2);
  box-shadow: 
    0 10px 40px rgba(0, 0, 0, 0.06),
    0 4px 20px rgba(0, 0, 0, 0.03);
  transform: translateZ(100px);
  padding: 16px 0;
}

.nav-container {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform-style: preserve-3d;
}

.nav-logo .logo-text {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, #21808d, #32b8ca);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 2px 8px rgba(33, 128, 141, 0.2);
  letter-spacing: -0.02em;
}

.nav-logo .brand{
  display:flex; align-items:center; gap:12px;
}
.brand-logo{
  height: clamp(18px, 4.2vw, 72px);
  width: auto; display:block;
  object-fit: contain;
  transition: transform .25s var(--ease-standard), opacity .25s  var(--ease-standard);
  transform: scale(1.25); transform-origin: left center;
  will-change: transform;
}
.nav.scrolled .brand-logo{
  height: clamp(36px, 3.4vw, 56px);
}
.brand-logo:hover{
  transform: translateZ(12px) scale(1.25);
}

/* Se il tuo SVG è scuro e serve più contrasto in dark mode: */
/*
@media (prefers-color-scheme: dark){
  .brand-logo{ filter: brightness(1.1) contrast(1.05); }
}
*/


.nav-menu {
  display: flex;
  list-style: none;
  gap: 40px;
  transform-style: preserve-3d;
}

.nav-link-3d {
  color: #2a3f4b;
  text-decoration: none;
  font-weight: var(--font-weight-medium);
  font-size: 15px;
  position: relative;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
  padding: 12px 20px;
  border-radius: 12px;
  letter-spacing: -0.01em;
}

.nav-link-3d:hover {
  color: #21808d;
  transform: translateY(-3px) translateZ(15px);
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(15px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
}

.nav-link-3d::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #21808d, #32b8ca);
  border-radius: 2px;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform: translateX(-50%);
}

.nav-link-3d:hover::after {
  width: 60%;
}

.nav-link-3d.active {
  color: #21808d;
  background: rgba(33,128,141,0.08);
  box-shadow: none;
}
.nav.scrolled {
  background: rgba(255,255,255,0.92);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 8px 28px rgba(0,0,0,0.05);
}


/* MODERN FLOATING ANIMATIONS */
.floating-element {
  animation: float3D 8s ease-in-out infinite;
  transform-style: preserve-3d;
}

.floating-hero {
  animation: floatHero 10s ease-in-out infinite;
}

.floating-icon {
  animation: floatIcon 6s ease-in-out infinite;
}

.floating-text {
  animation: floatText 9s ease-in-out infinite;
}

@keyframes float3D {
  0%, 100% { 
    transform: translateY(0px) translateZ(0px) rotateY(0deg);
  }
  25% { 
    transform: translateY(-10px) translateZ(8px) rotateY(1deg);
  }
  50% { 
    transform: translateY(0px) translateZ(15px) rotateY(0deg);
  }
  75% { 
    transform: translateY(10px) translateZ(8px) rotateY(-1deg);
  }
}

@keyframes floatHero {
  0%, 100% { 
    transform: translateY(0px) translateZ(0px) rotateX(0deg);
  }
  33% { 
    transform: translateY(-15px) translateZ(12px) rotateX(1deg);
  }
  66% { 
    transform: translateY(8px) translateZ(6px) rotateX(-1deg);
  }
}

@keyframes floatIcon {
  0%, 100% { 
    transform: translateY(0px) rotateZ(0deg) scale(1);
  }
  50% { 
    transform: translateY(-12px) rotateZ(8deg) scale(1.05);
  }
}

@keyframes floatText {
  0%, 100% { 
    transform: translateX(0px) translateY(0px);
  }
  25% { 
    transform: translateX(3px) translateY(-6px);
  }
  75% { 
    transform: translateX(-3px) translateY(6px);
  }
}

/* MODERN TILT EFFECTS */
.tilt-element {
  transform-style: preserve-3d;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.tilt-card {
  transform-style: preserve-3d;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

/* MODERN HOVER LIFT EFFECTS */
.hover-lift {
  transform-style: preserve-3d;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.hover-lift:hover {
  transform: translateY(-8px) translateZ(25px) rotateX(3deg);
}

.hover-rotate {
  transform-style: preserve-3d;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.hover-rotate:hover {
  transform: translateY(-6px) translateZ(20px) rotateY(4deg) rotateX(2deg);
}

.hover-rotate-y {
  transform-style: preserve-3d;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
}

.hover-rotate-y:hover {
  transform: translateY(-8px) translateZ(30px) rotateY(6deg);
}

/* ULTRA-MODERN HERO SECTION */
.hero-3d {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  perspective: 1500px;
  padding-top: calc(var(--nav-h) + 24px);
}

.hero-background-3d {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 25% 25%, rgba(33, 128, 141, 0.06) 0%, transparent 50%),
    radial-gradient(circle at 75% 75%, rgba(50, 184, 198, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.8) 0%, transparent 40%);
  transform-style: preserve-3d;
}

.hero-card{ 
  margin-bottom: 16px;                  
}

.gradient-orb-3d {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.22;
  transform-style: preserve-3d;
  will-change: transform;
}

.orb-1 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(33, 128, 141, 0.2) 0%, rgba(50, 184, 198, 0.06) 70%);
  top: 10%;
  left: 5%;
  animation: orbFloat1 25s ease-in-out infinite;
}

.orb-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(50, 184, 198, 0.15) 0%, rgba(33, 128, 141, 0.06) 70%);
  top: 60%;
  right: 10%;
  animation: orbFloat2 22s ease-in-out infinite;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(41, 150, 161, 0.12) 0%, rgba(29, 116, 128, 0.04) 70%);
  bottom: 20%;
  left: 30%;
  animation: orbFloat3 28s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) rotateZ(0deg) scale(1); }
  25% { transform: translate(50px, -40px) rotateZ(90deg) scale(1.1); }
  50% { transform: translate(-30px, 30px) rotateZ(180deg) scale(0.9); }
  75% { transform: translate(40px, 50px) rotateZ(270deg) scale(1.05); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) rotateZ(0deg) scale(1); }
  33% { transform: translate(-45px, -50px) rotateZ(120deg) scale(0.95); }
  66% { transform: translate(35px, 40px) rotateZ(240deg) scale(1.08); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(0, 0) rotateZ(0deg) scale(1); }
  20% { transform: translate(40px, -30px) rotateZ(72deg) scale(1.03); }
  40% { transform: translate(-50px, 20px) rotateZ(144deg) scale(0.97); }
  60% { transform: translate(30px, 45px) rotateZ(216deg) scale(1.06); }
  80% { transform: translate(-20px, -25px) rotateZ(288deg) scale(0.98); }
}

.hero-content {
  text-align: center;
  padding: 60px;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  transform-style: preserve-3d;
}

.avatar-placeholder-3d {
  width: 160px;
  height: 160px;
  background: linear-gradient(135deg, #21808d 0%, #32b8ca 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 60px;
  color: white;
  margin: 0 auto 40px;
  box-shadow: 
    0 20px 60px rgba(33, 128, 141, 0.3),
    0 8px 30px rgba(50, 184, 198, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  animation: avatarGlow 5s ease-in-out infinite alternate;
}

@keyframes avatarGlow {
  0% { 
    box-shadow: 
      0 20px 60px rgba(33, 128, 141, 0.3),
      0 8px 30px rgba(50, 184, 198, 0.2),
      inset 0 1px 0 rgba(255, 255, 255, 0.3);
  }
  100% { 
    box-shadow: 
      0 25px 80px rgba(33, 128, 141, 0.4),
      0 12px 40px rgba(50, 184, 198, 0.3),
      inset 0 1px 0 rgba(255, 255, 255, 0.4);
  }
}

.avatar-placeholder-3d::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer3D 4s infinite;
}

@keyframes shimmer3D {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); }
}

.hero-title {
  font-size: clamp(48px, 6vw, 72px);
  margin-bottom: 24px;
  line-height: var(--line-height-tight);
  transform-style: preserve-3d;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  color: #1a2e3b;
}

.highlight-3d {
  background: linear-gradient(135deg, #21808d 0%, #32b8ca 50%, #29a4b0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 4px 12px rgba(33, 128, 141, 0.2);
  animation: highlightPulse 4s ease-in-out infinite;
}

@keyframes highlightPulse {
  0%, 100% { filter: brightness(1) saturate(100%); }
  50% { filter: brightness(1.15) saturate(120%); }
}

.hero-subtitle {
  font-size: 24px;
  color: var(--color-slate-500);
  margin-bottom: 16px;
  font-weight: var(--font-weight-medium);
  letter-spacing: -0.01em;
}

.typewriter-text {
  font-size: 20px;
  color: #6b7c87;
  margin-bottom: 40px;
  font-weight: var(--font-weight-normal);
  letter-spacing: 0.02em;
}

/* MODERN HERO STATS */
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 40px 0;
  flex-wrap: wrap;
}

.stat-modern {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(15px);
  border-radius: 16px;
  border: 1px solid rgba(200, 200, 200, 0.2);
  min-width: 120px;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.stat-modern:hover {
  transform: translateY(-5px) translateZ(15px);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.stat-modern i {
  font-size: 24px;
  color: #21808d;
  margin-bottom: 4px;
}

.stat-modern span {
  font-size: 20px;
  font-weight: var(--font-weight-bold);
  color: #2a3f4b;
}

.stat-modern small {
  font-size: 12px;
  color: #6b7c87;
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.hero-cta {
  display: flex;
  gap: 24px;
  justify-content: center;
  margin: 50px 0 30px;
  flex-wrap: wrap;
}

.hero-location {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #6b7c87;
  font-size: 16px;
  font-weight: var(--font-weight-medium);
}

.hero-location i {
  color: #21808d;
}

.scroll-indicator-3d {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
  z-index: 3;
}

.scroll-arrow-3d {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(15px);
  border-radius: 50%;
  border: 1px solid rgba(200, 200, 200, 0.2);
  color: #21808d;
  font-size: 16px;
  animation: bounce3D 3s infinite;
  transition: all 0.3s ease;
}

.scroll-arrow-3d:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: scale(1.1);
}

@keyframes bounce3D {
  0%, 20%, 50%, 80%, 100% { 
    transform: translateY(0) translateZ(0); 
  }
  40% { 
    transform: translateY(-15px) translateZ(8px); 
  }
  60% { 
    transform: translateY(-8px) translateZ(4px); 
  }
}

/* MODERN SECTIONS STYLING */
.section-title {
  font-size: clamp(36px, 4vw, 48px);
  margin-bottom: 20px;
  position: relative;
  transform-style: preserve-3d;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #2a3f4b;
}

.section-title i {
  color: #21808d;
  font-size: 0.8em;
}

.title-3d::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: 50%;
  transform: translateX(-50%) translateZ(5px);
  width: 100px;
  height: 4px;
  background: linear-gradient(90deg, #21808d, #32b8ca);
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(33, 128, 141, 0.3);
}

.section-subtitle {
  text-align: center;
  color: var(--color-slate-500);
  font-size: 18px;
  font-weight: var(--font-weight-normal);
  letter-spacing: -0.01em;
  line-height: 1.6;
  max-width: 600px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 80px;
  padding: 40px;
}

section[id] {
  scroll-margin-top: calc(var(--nav-h) + 20px);
}

/* MODERN ABOUT SECTION */
.about-content {
  max-width: 1000px;
  margin: 0 auto;
  transform-style: preserve-3d;
}

.about-text {
  padding: 50px;
  text-align: center;
}

.about-intro h3 {
  font-size: 28px;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #21808d, #32b8ca);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;  
  background-clip: text;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.01em;
}

.about-bio {
  font-size: 18px;
  line-height: 1.7;
  color: #4a5e6b;
  margin-bottom: 40px;
  font-weight: var(--font-weight-normal);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 25px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 16px;
  border: 1px solid rgba(200, 200, 200, 0.2);
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.highlight-item:hover {
  transform: translateY(-5px) translateZ(15px);
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.highlight-item i {
  font-size: 32px;
  color: #21808d;
  flex-shrink: 0;
}

.highlight-item h4 {
  font-size: 18px;
  font-weight: var(--font-weight-semibold);
  color: #2a3f4b;
  margin-bottom: 4px;
}

.highlight-item p {
  font-size: 14px;
  color: #6b7c87;
  line-height: 1.4;
}

/* MODERN SERVICES SECTION */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  transform-style: preserve-3d;
}

.service-card {
  padding: 40px;
  text-align: center;
  position: relative;
  transform-style: preserve-3d;
}

.service-hover:hover {
  transform: translateY(-12px) translateZ(35px) rotateX(4deg) rotateY(2deg);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #21808d, #32b8ca);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  box-shadow: 0 10px 30px rgba(33, 128, 141, 0.2);
  transition: all 0.4s ease;
}

.service-icon i {
  font-size: 32px;
  color: white;
}

.service-card h3 {
  font-size: 22px;
  margin-bottom: 16px;
  color: #2a3f4b;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.01em;
}

.service-card p {
  font-size: 15px;
  color: var(--color-slate-500);
  line-height: 1.6;
  margin-bottom: 24px;
}

.service-features {
  list-style: none;
  text-align: left;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: #4a5e6b;
}

.service-features i {
  color: #21808d;
  font-size: 12px;
}

.service-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(33, 128, 141, 0.03) 0%, rgba(50, 184, 198, 0.02) 100%);
  border-radius: 24px;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.service-hover:hover .service-overlay {
  opacity: 1;
}

.service-hover:hover .service-icon {
  transform: translateZ(10px) rotateY(6deg);
  box-shadow: 0 12px 32px rgba(33, 128, 141, 0.26);
}

/* MODERN SKILLS SECTION */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  transform-style: preserve-3d;
}

.skills-category {
  padding: 40px;
  transform-style: preserve-3d;
}

.category-header {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.category-header i {
  font-size: 28px;
  color: #21808d;
}

.category-header h3 {
  font-size: 24px;
  color: #2a3f4b;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.01em;
}

.skill-bars {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.skill-bar {
  position: relative;
}

.skill-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.skill-name {
  font-size: 16px;
  font-weight: var(--font-weight-medium);
  color: var(--color-slate-500);
}

.skill-percentage {
  font-size: 14px;
  font-weight: 600;
  color: #2a3f4b;
}

.skill-progress {
  height: 10px;
  background: rgba(200, 200, 200, 0.2);
  border-radius: 10px;
  overflow: hidden;
  position: relative;
}

.skill-fill {
  height: 100%;
  background: linear-gradient(90deg, #21808d, #32b8ca);
  border-radius: 8px;
  transition: width 2s cubic-bezier(0.23, 1, 0.32, 1);
  position: relative;
  box-shadow: 0 2px 8px rgba(33, 128, 141, 0.2) none;
}

.skill-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: skillShimmer 2.5s infinite;
  opacity: 0.35;
}

@keyframes skillShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* MODERN CONTACT SECTION */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  max-width: 1200px;
  margin: 0 auto;
  transform-style: preserve-3d;
}

.contact-info {
  padding: 50px;
}

.contact-info h3 {
  font-size: 28px;
  margin-bottom: 20px;
  color: #2a3f4b;
  font-weight: var(--font-weight-semibold);
  letter-spacing: -0.01em;
}

.contact-info > p {
  font-size: 16px;
  color: var(--color-slate-500);
  line-height: 1.6;
  margin-bottom: 40px;
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item-3d {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 16px;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  border: 1px solid rgba(200, 200, 200, 0.2);
  transform-style: preserve-3d;
}

.contact-item-3d:hover {
  transform: translateX(10px) translateZ(15px);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #21808d, #32b8ca);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 20px;
  color: white;
}

.contact-item-3d h4 {
  font-size: 16px;
  font-weight: var(--font-weight-semibold);
  color: #2a3f4b;
  margin-bottom: 4px;
}

.contact-item-3d p {
  font-size: 14px;
  color: var(--color-slate-500);
  margin: 0;
}

/* MODERN CONTACT FORM */
.contact-form {
  padding: 50px;
  transform-style: preserve-3d;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-weight: var(--font-weight-medium);
  font-size: 14px;
  color: #2a3f4b;
}

.form-group label i {
  color: #21808d;
  font-size: 14px;
}

.form-input-3d {
  width: 100%;
  padding: 16px 20px;
  border: 1px solid rgba(200, 200, 200, 0.3);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  color: #2a3f4b;
  font-size: 15px;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
  font-family: inherit;
}

.form-input-3d:focus {
  outline: none;
  border-color: #21808d;
  background: rgba(255, 255, 255, 0.8);
  transform: translateY(-2px) translateZ(8px);
  box-shadow: 0 10px 30px rgba(33, 128, 141, 0.15);
}

.form-input-3d::placeholder {
  color: #9ca3af;
}

textarea.form-input-3d {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  margin-top: 16px;
}

/* MODERN FOOTER */
.footer-3d {
  background: linear-gradient(135deg, 
    rgba(33, 128, 141, 0.03) 0%, 
    rgba(50, 184, 198, 0.02) 50%,
    rgba(255, 255, 255, 0.8) 100%);
  padding: 60px 0 30px;
  margin-top: 120px;
  transform-style: preserve-3d;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 40px;
  margin-bottom: 30px;
}

.footer-logo {
  text-align: left;
}

.footer-logo .logo-text {
  font-size: 28px;
  font-weight: var(--font-weight-bold);
  background: linear-gradient(135deg, #21808d, #32b8ca);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 8px;
}

.footer-logo p {
  margin: 0;
  color: #6b7c87;
  font-size: 14px;
  font-weight: var(--font-weight-medium);
}

.footer-tagline {
  color: #21808d !important;
  font-weight: var(--font-weight-semibold) !important;
}

.footer-social {
  display: flex;
  gap: 16px;
}

.social-link-3d {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  color: #21808d;
  text-decoration: none;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(200, 200, 200, 0.2);
  transform-style: preserve-3d;
  font-size: 18px;
}

.social-link-3d:hover {
  background: #21808d;
  color: white;
  transform: translateY(-8px) translateZ(20px) rotateY(15deg);
  box-shadow: 0 15px 40px rgba(33, 128, 141, 0.3);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(200, 200, 200, 0.2);
  color: #9ca3af;
  font-size: 14px;
}

/* PARTICLES CONTAINER */
.particles-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  pointer-events: none;
  z-index: 1;
}

/* HAMBURGER MENU */
.hamburger-3d {
  display: none;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(200, 200, 200, 0.2);
  cursor: pointer;
  padding: 12px;
  gap: 6px;
  border-radius: 12px;
  backdrop-filter: blur(15px);
  transition: all 0.4s ease;
  transform-style: preserve-3d;
}

.hamburger-3d:hover {
  transform: translateY(-3px) translateZ(15px);
  background: rgba(255, 255, 255, 0.95);
}

.hamburger-3d span {
  width: 28px;
  height: 3px;
  background: #21808d;
  border-radius: 3px;
  transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  
  .nav-menu {
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    height: calc(100dvh - var(--nav-h));
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(30px);
    flex-direction: column;
    padding: max(16px, env(safe-area-inset-top)) 24px 24px 24px;
    gap: 24px;
    border-bottom: 1px solid rgba(200, 200, 200, 0.2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform 0.5s cubic-bezier(0.23,1,0.32,1), opacity 0.3s;
    overflow-y: auto;
    z-index: 1001;
    pointer-events: none;
  }

  .nav-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 64px;
    padding: 0;
  }


  .nav-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

    body.menu-open {
    overflow: hidden;
    touch-action: none;
  }

  body.menu-open section[id] {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    transition: none !important;
  }

  .hamburger-3d {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    z-index: 3;
  }

  .nav.scrolled .brand-logo{
    height: 40px;
  }

  .hamburger-3d {
    display: flex;
  }

  .hamburger-3d.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
  }

  .hamburger-3d.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(30px);
  }

  .hamburger-3d.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
  }

  .hero-content {
    padding: 40px 20px;
  }

  .hero-stats {
    flex-direction: column;
    gap: 20px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .section-3d {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 60px;
    padding: 30px 20px;
  }

  .about-highlights,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .services-grid,
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .footer-content {
    flex-direction: column;
    gap: 30px;
    text-align: center;
  }

  .about-text,
  .contact-info,
  .contact-form,
  .skills-category,
  .service-card {
    padding: 30px;
  }

  /* Reduce 3D effects on mobile for performance */
  .glass-card-3d:hover {
    transform: translateY(-6px) translateZ(15px);
  }

  .hover-lift:hover {
    transform: translateY(-6px) translateZ(16px) rotateX(2deg);
  }

  .hover-rotate:hover,
  .hover-rotate-y:hover {
    transform: translateY(-6px) translateZ(20px) rotateY(4deg);
  }
}

@media (max-width: 480px) {
  .hero-content,
  .section-header,
  .glass-card-3d {
    padding: 20px;
  }

  .hero-title {
    font-size: 36px;
  }

  .section-title {
    font-size: 28px;
  }

  .avatar-placeholder-3d {
    width: 120px;
    height: 120px;
    font-size: 40px;
  }

  .orb-1, .orb-2, .orb-3 {
    transform: scale(0.6);
  }

  .nav-container {
    padding: 0 20px;
  }

  /* Further reduce 3D effects on small screens */
  .floating-element,
  .floating-hero,
  .floating-icon,
  .floating-text {
    animation: none;
  }
}

/* PERFORMANCE OPTIMIZATIONS */
.glass-card-3d,
.glass-button-3d,
.nav-link-3d,
.hover-lift,
.hover-rotate,
.hover-rotate-y,
.tilt-card {
  will-change: transform;
  backface-visibility: hidden;
  transform: translateZ(0);
}

/* ACCESSIBILITY */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .floating-element,
  .floating-hero,
  .floating-icon,
  .floating-text {
    animation: none;
  }
  
  .gradient-orb-3d {
    animation: none;
  }
}

section[id] {
  opacity: 0;
  visibility: hidden;
  transform: translateY(40px);
  transition: opacity 420ms var(--ease-standard), transform 420ms var(--ease-standard), visibility 0s linear 420ms;
}

/* visibili quando l'observer le marca */
section[id].is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition: opacity 420ms var(--ease-standard), transform 420ms var(--ease-standard), visibility 0s;
}

/* opzionale: piccoli ritardi sugli elementi interni quando la sezione entra */
section[id].is-visible .glass-card-3d,
section[id].is-visible .service-card,
section[id].is-visible .highlight-item,
section[id].is-visible .stat-modern,
section[id].is-visible .contact-item-3d {
  animation: slideInUp3D 0.6s cubic-bezier(0.23, 1, 0.32, 1) both;
}

/* accessibilità: se l’utente chiede meno animazioni, mostra subito tutto */
@media (prefers-reduced-motion: reduce) {
  section[id] {
    opacity: 1 !important;
    visibility: visible !important;
    transform: none !important;
    transition: none !important;
  }
}