/* Fresh & User-Friendly Age Calculator Design */
@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Space+Grotesk:wght@400;500;600;700&display=swap");

:root {
  /* Fresh Color Palette */
  --primary-50: #f0f9ff;
  --primary-100: #e0f2fe;
  --primary-200: #bae6fd;
  --primary-300: #7dd3fc;
  --primary-400: #38bdf8;
  --primary-500: #0ea5e9;
  --primary-600: #0284c7;
  --primary-700: #0369a1;
  --primary-800: #075985;
  --primary-900: #0c4a6e;

  /* Neutral Colors */
  --gray-50: #fafafa;
  --gray-100: #f4f4f5;
  --gray-200: #e4e4e7;
  --gray-300: #d4d4d8;
  --gray-400: #a1a1aa;
  --gray-500: #71717a;
  --gray-600: #52525b;
  --gray-700: #3f3f46;
  --gray-800: #27272a;
  --gray-900: #18181b;

  /* Accent Colors */
  --success: #22c55e;
  --warning: #f59e0b;
  --error: #ef4444;
  --purple: #8b5cf6;
  --pink: #ec4899;
  --orange: #f97316;

  /* Typography */
  --font-primary: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: "Space Grotesk", sans-serif;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;

  /* Border Radius - Updated to 4px */
  --radius-sm: 0.25rem;
  --radius: 0.25rem;
  --radius-md: 0.25rem;
  --radius-lg: 0.25rem;
  --radius-xl: 0.25rem;
  --radius-2xl: 0.25rem;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 10px 10px -5px rgb(0 0 0 / 0.04);

  /* Transitions */
  --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset & Base Styles */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-weight: 400;
  line-height: 1.6;
  color: var(--gray-800);
  background: var(--gray-50);
  min-height: 100vh;
}

/* Typography Scale */
.text-xs {
  font-size: 0.75rem;
  line-height: 1rem;
}
.text-sm {
  font-size: 0.875rem;
  line-height: 1.25rem;
}
.text-base {
  font-size: 1rem;
  line-height: 1.5rem;
}
.text-lg {
  font-size: 1.125rem;
  line-height: 1.75rem;
}
.text-xl {
  font-size: 1.25rem;
  line-height: 1.75rem;
}
.text-2xl {
  font-size: 1.5rem;
  line-height: 2rem;
}
.text-3xl {
  font-size: 1.875rem;
  line-height: 2.25rem;
}
.text-4xl {
  font-size: 2.25rem;
  line-height: 2.5rem;
}
.text-5xl {
  font-size: 3rem;
  line-height: 1;
}
.text-6xl {
  font-size: 3.75rem;
  line-height: 1;
}

.font-light {
  font-weight: 300;
}
.font-normal {
  font-weight: 400;
}
.font-medium {
  font-weight: 500;
}
.font-semibold {
  font-weight: 600;
}
.font-bold {
  font-weight: 700;
}
.font-extrabold {
  font-weight: 800;
}

/* Header - Fully Responsive */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  transition: var(--transition);
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  position: relative;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--gray-900);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.5rem;
  transition: var(--transition);
  z-index: 60;
}

.logo:hover {
  color: var(--primary-600);
}

.logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  position: relative;
}

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  list-style: none;
  gap: var(--space-6);
  margin: 0;
}

.nav-link {
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-2) var(--space-3);
  border-radius: 4px;
  transition: var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: #000000;
  background: var(--primary-50);
}

/* Desktop Language Selector */
.desktop-lang {
  position: relative;
}

.language-select {
  appearance: none;
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  padding: var(--space-2) var(--space-8) var(--space-2) var(--space-3);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  cursor: pointer;
  transition: var(--transition);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.5rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
}

.language-select:hover {
  border-color: var(--primary-400);
}

.language-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgb(14 165 233 / 0.1);
}

/* Mobile Menu Toggle Button */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  padding: var(--space-2);
  cursor: pointer;
  border-radius: 4px;
  transition: var(--transition);
  z-index: 60;
  position: relative;
  width: 40px;
  height: 40px;
  justify-content: center;
  align-items: center;
}

.mobile-menu-toggle:hover {
  background: var(--gray-100);
}

.mobile-menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--gray-600);
  border-radius: 1px;
  transition: var(--transition);
  display: block;
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 45;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Mobile Menu */
.mobile-menu {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 50;
  max-height: calc(100vh - 70px);
  overflow-y: auto;
}

.mobile-menu.active {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Mobile Navigation Menu */
.mobile-nav-menu {
  display: flex;
  flex-direction: column;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 0;
}

.mobile-nav-menu li {
  width: 100%;
  border-bottom: 1px solid var(--gray-100);
}

.mobile-nav-menu li:last-child {
  border-bottom: none;
}

.mobile-nav-menu .nav-link {
  display: block;
  width: 100%;
  padding: var(--space-4);
  text-align: center;
  font-size: 1.1rem;
  color: var(--gray-700);
  border-radius: 0;
}

.mobile-nav-menu .nav-link:hover,
.mobile-nav-menu .nav-link.active {
  color: #000;
  background: var(--primary-50);
}

/* Mobile Language Selector */
.mobile-language-selector {
  width: 100%;
  padding: var(--space-4);
  background: var(--gray-50);
  border-radius: 4px;
  border: 1px solid var(--gray-200);
}

.mobile-lang-label {
  display: block;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
  text-align: center;
  font-size: 0.9rem;
}

.mobile-language-select {
  width: 100%;
  padding: var(--space-3);
  font-size: 1rem;
  text-align: center;
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  color: var(--gray-700);
  cursor: pointer;
  transition: var(--transition);
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.75rem center;
  background-repeat: no-repeat;
  background-size: 1.5em 1.5em;
  padding-right: 2.5rem;
}

.mobile-language-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgb(14 165 233 / 0.1);
}

/* Mobile Language Selector in Header (separate from dropdown menu) */
.mobile-language-selector-header {
  display: none;
  position: relative;
}

.mobile-language-select-header {
  appearance: none;
  background: white;
  border: 1px solid var(--gray-300);
  border-radius: 4px;
  padding: var(--space-2) var(--space-6) var(--space-2) var(--space-2);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-700);
  cursor: pointer;
  transition: var(--transition);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
  background-position: right 0.25rem center;
  background-repeat: no-repeat;
  background-size: 1em 1em;
  min-width: 50px;
}

.mobile-language-select-header:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 2px rgb(14 165 233 / 0.1);
}

/* Desktop View (≥ 1024px) - Show full horizontal menu */
@media (min-width: 1024px) {
  .mobile-menu-toggle {
    display: none !important;
  }

  .desktop-nav {
    display: flex !important;
  }

  .desktop-lang {
    display: block !important;
  }

  .mobile-language-selector-header {
    display: none !important;
  }

  .mobile-menu,
  .mobile-menu-overlay {
    display: none !important;
  }
}

/* Tablet and Mobile View (≤ 1023px) - Show hamburger menu */
@media (max-width: 1023px) {
  .mobile-menu-toggle {
    display: flex !important;
  }

  .desktop-nav {
    display: none !important;
  }

  .desktop-lang {
    display: none !important;
  }

  .mobile-language-selector-header {
    display: block !important;
  }

  /* Remove the old mobile language selector styles */
  .mobile-language-selector {
    display: none !important;
  }

  /* Hamburger Animation */
  .mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

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

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

/* Mobile specific adjustments (≤ 767px) */
@media (max-width: 767px) {
  .header-container {
    padding: 0 var(--space-3);
  }

  .logo {
    font-size: 1.25rem;
  }

  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: 1rem;
  }

  .mobile-menu-content {
    padding: var(--space-3);
  }

  .mobile-nav-menu .nav-link {
    padding: var(--space-3);
    font-size: 1rem;
  }

  .mobile-language-selector {
    padding: var(--space-3);
  }
}

/* Hero Section - Fully Responsive */
.hero {
  padding: var(--space-12) 0 var(--space-8);
  background: linear-gradient(135deg, var(--primary-50) 0%, white 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 40%;
  height: 100%;
  background: url("data:image/svg+xml,%3Csvg width='40' height='40' viewBox='0 0 40 40' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%230ea5e9' fill-opacity='0.03'%3E%3Ccircle cx='20' cy='20' r='3'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")
    repeat;
  z-index: 1;
}

.hero-content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  margin-bottom: var(--space-10);
  padding: 0 var(--space-4);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--gray-600);
  margin-bottom: var(--space-6);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.hero-features {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  padding: 0 var(--space-2);
}

.hero-feature {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-600);
  font-size: 0.875rem;
  font-weight: 500;
  white-space: nowrap;
  flex-shrink: 0;
}

.hero-feature-icon {
  width: 20px;
  height: 20px;
  background: var(--primary-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
}

/* Hero Responsive */
@media (max-width: 768px) {
  .hero {
    padding: var(--space-8) 0 var(--space-6);
  }

  .hero-content {
    padding: 0 var(--space-3);
  }

  .hero-title {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
    margin-bottom: var(--space-3);
  }

  .hero-subtitle {
    font-size: 1rem;
    margin-bottom: var(--space-4);
  }

  .hero-features {
    justify-content: center;
    gap: var(--space-3);
    padding: 0 var(--space-3);
    flex-wrap: wrap;
  }

  .hero-feature {
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .hero {
    padding: var(--space-6) 0 var(--space-4);
  }

  .hero-content {
    padding: 0 var(--space-2);
  }

  .hero-title {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }

  .hero-subtitle {
    font-size: 0.9rem;
  }

  .hero-features {
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }

  .hero-feature {
    font-size: 0.75rem;
  }

  .hero-feature-icon {
    width: 16px;
    height: 16px;
    font-size: 0.65rem;
  }
}

/* Calculator Card - Fully Responsive */
.calculator-card {
  background: white;
  border-radius: 4px;
  box-shadow: var(--shadow-lg);
  padding: var(--space-8);
  max-width: 1100px;
  margin: 0 auto;
  border: 1px solid var(--gray-200);
}

.calculator-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.calculator-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.calculator-subtitle {
  color: var(--gray-600);
  font-size: 1rem;
}

.calculator-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.form-label {
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.875rem;
}

.form-input {
  padding: var(--space-4);
  border: 2px solid var(--gray-200);
  border-radius: 4px;
  font-size: 1rem;
  transition: var(--transition);
  background: white;
  color: var(--gray-900);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgb(14 165 233 / 0.1);
}

.form-input.error {
  border-color: var(--error);
  box-shadow: 0 0 0 3px rgb(239 68 68 / 0.1);
}

.error-message {
  color: var(--error);
  font-size: 0.875rem;
  margin-top: var(--space-1);
}

.calculate-btn {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  border: none;
  border-radius: 4px;
  padding: var(--space-4) var(--space-6);
  font-size: 1.125rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.calculate-btn:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.calculate-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

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

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

/* Calculator Responsive */
@media (max-width: 1024px) {
  .calculator-card {
    margin: 0 var(--space-4);
    padding: var(--space-6);
  }
}

@media (max-width: 768px) {
  .calculator-card {
    margin: 0 var(--space-3);
    padding: var(--space-5);
  }

  .calculator-title {
    font-size: 1.25rem;
  }

  .calculator-subtitle {
    font-size: 0.9rem;
  }

  .form-input {
    padding: var(--space-3);
    font-size: 0.95rem;
  }

  .calculate-btn {
    padding: var(--space-3) var(--space-5);
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .calculator-card {
    margin: 0 var(--space-2);
    padding: var(--space-4);
  }

  .calculator-title {
    font-size: 1.1rem;
  }

  .calculator-subtitle {
    font-size: 0.85rem;
  }

  .form-input {
    padding: var(--space-2);
    font-size: 0.9rem;
  }

  .calculate-btn {
    padding: var(--space-2) var(--space-4);
    font-size: 0.95rem;
  }
}

/* Results Section - Fully Responsive */
.results-section {
  padding: var(--space-12) 0;
  background: var(--gray-50);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.results-section.show {
  opacity: 1;
  transform: translateY(0);
}

.results-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.results-header {
  text-align: center;
  margin-bottom: var(--space-8);
}

.results-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.results-subtitle {
  color: var(--gray-600);
  font-size: 1.125rem;
}

/* Primary Age Display */
.age-display-card {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
  color: white;
  border-radius: 4px;
  padding: var(--space-8);
  text-align: center;
  margin-bottom: var(--space-8);
  position: relative;
  overflow: hidden;
}

.age-display-card::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(180deg);
  }
}

.age-display {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  margin-bottom: var(--space-3);
  position: relative;
  z-index: 2;
}

.age-label {
  font-size: 1.125rem;
  opacity: 0.9;
  font-weight: 500;
  position: relative;
  z-index: 2;
}

/* Stats Grid - Fully Responsive */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-12);
}

.stat-card {
  background: white;
  border-radius: 4px;
  padding: var(--space-6);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  transition: var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  transform: scaleY(0);
  transition: transform 0.3s ease;
}

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

.stat-card:hover::before {
  transform: scaleY(1);
}

.stat-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.stat-icon {
  width: 40px;
  height: 40px;
  background: var(--primary-50);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--primary-600);
}

.stat-title {
  font-weight: 600;
  color: var(--gray-700);
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
  padding: 0rem 1.3rem;
}

.stat-unit {
  color: var(--gray-500);
  font-size: 0.875rem;
  font-weight: 500;
}

/* Stats Grid Responsive */
@media (max-width: 1024px) {
  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
  }

  .results-container {
    padding: 0 var(--space-3);
  }
}

@media (max-width: 768px) {
  .results-section {
    padding: var(--space-8) 0;
  }

  .stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-3);
  }

  .stat-card {
    padding: var(--space-4);
  }

  .stat-value {
    font-size: 1.5rem;
  }

  .results-title {
    font-size: 1.75rem;
  }

  .results-subtitle {
    font-size: 1rem;
  }

  .age-display-card {
    padding: var(--space-6);
  }

  .age-display {
    font-size: clamp(1.75rem, 6vw, 2.5rem);
  }

  .age-label {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }

  .stat-card {
    padding: var(--space-3);
  }

  .stat-icon {
    width: 32px;
    height: 32px;
    font-size: 1rem;
  }

  .stat-value {
    font-size: 1.25rem;
  }

  .stat-title {
    font-size: 0.75rem;
  }

  .results-container {
    padding: 0 var(--space-2);
  }

  .age-display-card {
    padding: var(--space-4);
  }

  .age-display {
    font-size: clamp(1.5rem, 8vw, 2rem);
  }
}

/* Section Styles - Responsive */
.section {
  padding: var(--space-12) 0;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.section.show {
  opacity: 1;
  transform: translateY(0);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-10);
  padding: 0 var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  color: var(--gray-600);
  font-size: 1rem;
  max-width: 600px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .section {
    padding: var(--space-8) 0;
  }

  .section-header {
    margin-bottom: var(--space-6);
    padding: 0 var(--space-3);
  }

  .section-title {
    font-size: 1.75rem;
  }

  .section-subtitle {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .section {
    padding: var(--space-6) 0;
  }

  .section-header {
    padding: 0 var(--space-2);
  }

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

/* Fun Facts Section - Responsive */
.facts-section {
  background: white;
  border-radius: 4px;
  padding: var(--space-12);
  margin: var(--space-8) 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
}

.facts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.fact-card {
  background: var(--gray-50);
  border-radius: 4px;
  padding: var(--space-6);
  text-align: center;
  transition: var(--transition-slow);
  border: 1px solid var(--gray-200);
}

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

.fact-emoji {
  font-size: 2.5rem;
  margin-bottom: var(--space-4);
  display: block;
}

.fact-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-600);
  margin-bottom: var(--space-2);
}

.fact-label {
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

.fact-description {
  color: var(--gray-500);
  font-size: 0.875rem;
}

@media (max-width: 1024px) {
  .facts-section {
    padding: var(--space-8);
    margin: var(--space-6) var(--space-4);
  }

  .facts-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
  }
}

@media (max-width: 768px) {
  .facts-section {
    padding: var(--space-6);
    margin: var(--space-4) var(--space-3);
  }

  .facts-grid {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }

  .fact-card {
    padding: var(--space-4);
  }

  .fact-emoji {
    font-size: 2rem;
  }

  .fact-number {
    font-size: 1.75rem;
  }
}

@media (max-width: 480px) {
  .facts-section {
    padding: var(--space-4);
    margin: var(--space-3) var(--space-2);
  }

  .fact-card {
    padding: var(--space-3);
  }

  .fact-emoji {
    font-size: 1.75rem;
  }

  .fact-number {
    font-size: 1.5rem;
  }

  .fact-description {
    font-size: 0.8rem;
  }
}

/* Action Buttons - Responsive */
.action-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-8);
  padding: 0 var(--space-4);
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  border-radius: 4px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  font-size: 0.875rem;
}

.action-btn.primary {
  background: var(--primary-600);
  color: white;
}

.action-btn.secondary {
  background: white;
  color: var(--gray-700);
  border: 1px solid var(--gray-300);
}

.action-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.action-btn.primary:hover {
  background: var(--primary-700);
}

.action-btn.secondary:hover {
  background: var(--gray-50);
  border-color: var(--gray-400);
}

@media (max-width: 768px) {
  .action-buttons {
    gap: var(--space-3);
    padding: 0 var(--space-3);
  }

  .action-btn {
    padding: var(--space-2) var(--space-4);
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  .action-buttons {
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: 0 var(--space-2);
  }

  .action-btn {
    width: 100%;
    max-width: 200px;
    justify-content: center;
  }
}

/* Footer - Fully Responsive */
.footer {
  background: var(--gray-900);
  color: white;
  padding: var(--space-16) 0 var(--space-8);
  margin-top: 1rem;
}

.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(218px, 1fr));
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.footer-section h3 {
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: white;
}

.footer-section p,
.footer-section a {
  color: var(--gray-400);
  text-decoration: none;
  transition: var(--transition);
}

.footer-section a:hover {
  color: var(--primary-400);
}

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

.footer-section ul li {
  margin-bottom: var(--space-2);
}

.footer-bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: var(--space-6);
  text-align: center;
  color: #ffffff;
}

@media (max-width: 1024px) {
  .footer {
    padding: var(--space-12) 0 var(--space-6);
  }

  .footer-container {
    padding: 0 var(--space-3);
  }

  .footer-content {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-6);
  }
}

@media (max-width: 768px) {
  .footer {
    padding: var(--space-8) 0 var(--space-4);
  }

  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-4);
  }

  .footer-section h3 {
    font-size: 1rem;
  }

  .footer-section p,
  .footer-section a {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-3);
    text-align: center;
  }

  .footer-container {
    padding: 0 var(--space-2);
  }

  .footer-section h3 {
    font-size: 0.95rem;
  }

  .footer-section p,
  .footer-section a {
    font-size: 0.85rem;
  }
}

/* Extended Results - Responsive */
.extended-section {
  background: white;
  border-radius: 4px;
  padding: var(--space-6);
  margin: var(--space-6) 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease;
}

.extended-section:nth-child(even) {
  background: #eeeeee;
}

.extended-section.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .extended-section {
    padding: var(--space-4);
    margin: var(--space-4) var(--space-3);
  }
}

@media (max-width: 768px) {
  .extended-section {
    padding: var(--space-3);
    margin: var(--space-3) var(--space-2);
  }
}

@media (max-width: 480px) {
  .extended-section {
    padding: var(--space-2);
    margin: var(--space-2) var(--space-1);
  }
}

/* Grid Layouts - Fully Responsive */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}

.info-item {
  background: var(--gray-50);
  border-radius: 4px;
  padding: var(--space-3);
  text-align: center;
  transition: var(--transition-slow);
  border: 1px solid var(--gray-200);
}

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

.info-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.info-value {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--gray-900);
  line-height: 1.3;
}

.info-subvalue {
  font-size: 0.8rem;
  color: var(--gray-500);
  margin-top: var(--space-1);
}

@media (max-width: 1024px) {
  .info-grid {
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-2);
  }
}

@media (max-width: 768px) {
  .info-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-2);
  }

  .info-item {
    padding: var(--space-2);
  }

  .info-value {
    font-size: 1rem;
  }

  .info-label {
    font-size: 0.65rem;
  }
}

@media (max-width: 480px) {
  .info-grid {
    grid-template-columns: 1fr;
  }

  .info-value {
    font-size: 0.95rem;
  }
}

/* Countdown Grid - Responsive */
.countdown-section {
  background: white;
  border-radius: 4px;
  padding: var(--space-8);
  margin: var(--space-8) 0;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  text-align: center;
}

.countdown-section h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: var(--space-4);
}

.countdown-message {
  color: var(--gray-600);
  margin-bottom: var(--space-6);
}

.countdown-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: 600px;
  margin: 0 auto;
}

.countdown-item {
  background: var(--gray-50);
  border-radius: 4px;
  padding: var(--space-4);
  text-align: center;
  border: 1px solid var(--gray-200);
}

.countdown-value {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: white !important;
  padding: var(--space-3);
  border-radius: 8px;
  margin-bottom: var(--space-1);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

#countdownDays {
  background: linear-gradient(135deg, #dc2626, #b91c1c) !important;
  color: white !important;
}

#countdownHours {
  background: linear-gradient(135deg, #ea580c, #c2410c) !important;
  color: white !important;
}

#countdownMinutes {
  background: linear-gradient(135deg, #16a34a, #15803d) !important;
  color: white !important;
}

#countdownSeconds {
  background: linear-gradient(135deg, #2563eb, #1d4ed8) !important;
  color: white !important;
}

.countdown-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

@media (max-width: 1024px) {
  .countdown-section {
    padding: var(--space-6);
    margin: var(--space-6) var(--space-3);
  }
}

@media (max-width: 768px) {
  .countdown-section {
    padding: var(--space-4);
    margin: var(--space-4) var(--space-2);
  }

  .countdown-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .countdown-section h3 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .countdown-grid {
    grid-template-columns: 1fr;
  }

  .countdown-value {
    font-size: 1.1rem;
  }

  .countdown-section {
    padding: var(--space-3);
    margin: var(--space-3) var(--space-1);
  }
}

/* Utility Classes */
.container {
  max-width: 1100px;
  margin: 0 auto;
}

/* Content Sections - Responsive */
.content-sections {
  padding: 1rem;
  background: white;
}

.content-section {
  max-width: 1100px;
  margin: 0 auto var(--space-12);
  padding: 0 var(--space-4);
}

.content-section h2 {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
  text-align: center;
}

.content-section h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-800);
  margin: var(--space-8) 0 var(--space-4);
}

.content-section p {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--gray-700);
  margin-bottom: var(--space-4);
}

.content-section ul {
  margin: var(--space-4) 0;
  padding-left: var(--space-6);
}

.content-section li {
  font-size: 1.125rem;
  line-height: 1.7;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}

@media (max-width: 1024px) {
  .content-sections {
    padding: var(--space-12) 0;
  }

  .content-section {
    padding: 0 var(--space-3);
  }
}

@media (max-width: 768px) {
  .content-sections {
    padding: var(--space-8) 0;
  }

  .content-section {
    padding: 0 var(--space-2);
    margin: 0 auto var(--space-8);
  }

  .content-section h2 {
    font-size: 1.75rem;
  }

  .content-section h3 {
    font-size: 1.25rem;
  }

  .content-section p,
  .content-section li {
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .content-section h2 {
    font-size: 1.5rem;
  }

  .content-section h3 {
    font-size: 1.1rem;
  }

  .content-section p,
  .content-section li {
    font-size: 0.9rem;
  }
}

/* Features Section - Responsive */
.features {
  padding: 2rem 0;
  background: var(--gray-50);
}

.features h2 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  text-align: center;
  margin-bottom: var(--space-12);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.feature-card {
  background: white;
  border-radius: 4px;
  padding: var(--space-8);
  text-align: center;
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  transition: var(--transition-slow);
}

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

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
}

.feature-card p {
  color: var(--gray-600);
  line-height: 1.6;
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    padding: 0 var(--space-3);
  }

  .features h2 {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .features {
    padding: 1.5rem 0;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: 0 var(--space-2);
  }

  .feature-card {
    padding: var(--space-6);
  }

  .feature-icon {
    font-size: 2.5rem;
  }

  .features h2 {
    font-size: 1.75rem;
    margin-bottom: var(--space-8);
  }
}

@media (max-width: 480px) {
  .feature-card {
    padding: var(--space-4);
  }

  .feature-icon {
    font-size: 2rem;
  }

  .feature-card h3 {
    font-size: 1.1rem;
  }

  .feature-card p {
    font-size: 0.9rem;
  }
}

/* Page Header - Responsive */
.page-header {
  padding: var(--space-16) 0 var(--space-12);
  background: linear-gradient(135deg, var(--primary-50) 0%, white 100%);
  text-align: center;
}

.page-header h1 {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.page-header p {
  font-size: 1.25rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--space-4);
}

@media (max-width: 768px) {
  .page-header {
    padding: var(--space-12) 0 var(--space-8);
  }

  .page-header h1 {
    font-size: 2rem;
  }

  .page-header p {
    font-size: 1.1rem;
    padding: 0 var(--space-3);
  }
}

@media (max-width: 480px) {
  .page-header {
    padding: var(--space-8) 0 var(--space-6);
  }

  .page-header h1 {
    font-size: 1.75rem;
  }

  .page-header p {
    font-size: 1rem;
    padding: 0 var(--space-2);
  }
}

/* Blog Styles - Responsive */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--space-8);
  margin-top: var(--space-8);
  padding: 0 var(--space-4);
}

.blog-post {
  background: white;
  border-radius: 4px;
  padding: var(--space-8);
  box-shadow: var(--shadow);
  border: 1px solid var(--gray-200);
  transition: var(--transition-slow);
}

.blog-post:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.blog-post h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-3);
  text-align: left;
}

.post-meta {
  font-size: 0.875rem;
  color: var(--gray-500);
  margin-bottom: var(--space-4);
}

.read-more {
  color: var(--primary-600);
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
}

.read-more:hover {
  color: var(--primary-700);
}

@media (max-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-6);
    padding: 0 var(--space-3);
  }
}

@media (max-width: 768px) {
  .blog-grid {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding: 0 var(--space-2);
  }

  .blog-post {
    padding: var(--space-6);
  }

  .blog-post h2 {
    font-size: 1.25rem;
  }
}

@media (max-width: 480px) {
  .blog-post {
    padding: var(--space-4);
  }

  .blog-post h2 {
    font-size: 1.1rem;
  }

  .post-meta {
    font-size: 0.8rem;
  }
}

/* Full Width Gradient Section - Responsive */
.full-width-gradient-section {
  width: 100%;
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-500) 50%, var(--primary-400) 100%);
  padding: var(--space-16) 0;
}

.gradient-section-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.gradient-section-left {
  display: flex;
  align-items: center;
  justify-content: center;
}

.gradient-section-title {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: white;
  text-align: center;
  line-height: 1.2;
}

.gradient-section-right {
  color: white;
}

.gradient-section-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.gradient-bullet-point {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.gradient-bullet-icon {
  width: 24px;
  height: 24px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.gradient-bullet-text {
  flex: 1;
}

.gradient-bullet-title {
  font-weight: 600;
  font-size: 1.125rem;
  margin-bottom: var(--space-2);
  color: white;
}

.gradient-bullet-description {
  font-size: 1rem;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

@media (max-width: 1024px) {
  .full-width-gradient-section {
    padding: var(--space-12) 0;
  }

  .gradient-section-container {
    padding: 0 var(--space-3);
    gap: var(--space-8);
  }

  .gradient-section-title {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  .full-width-gradient-section {
    padding: var(--space-8) 0;
  }

  .gradient-section-container {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    text-align: center;
    padding: 0 var(--space-2);
  }

  .gradient-section-title {
    font-size: 1.75rem;
  }

  .gradient-bullet-title {
    font-size: 1rem;
  }

  .gradient-bullet-description {
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .full-width-gradient-section {
    padding: var(--space-6) 0;
  }

  .gradient-section-title {
    font-size: 1.5rem;
  }

  .gradient-bullet-point {
    gap: var(--space-2);
  }

  .gradient-bullet-icon {
    width: 20px;
    height: 20px;
    font-size: 0.75rem;
  }

  .gradient-bullet-title {
    font-size: 0.95rem;
  }

  .gradient-bullet-description {
    font-size: 0.85rem;
  }
}

/* Calculator Value Colors */
#totalMonths {
  color: #dc2626;
} /* Red */
#totalWeeks {
  color: #ea580c;
} /* Orange */
#totalDays {
  color: #ca8a04;
} /* Yellow */
#totalHours {
  color: #dc2626;
} /* Dark Red */
#totalMinutes {
  color: #16a34a;
} /* Green */
#totalSeconds {
  color: #2563eb;
} /* Blue */
#breaths {
  color: #7c3aed;
} /* Purple */
#heartbeats {
  color: #dc2626;
} /* Red */
#laughing {
  color: #059669;
} /* Emerald */
#sleeping {
  color: #4338ca;
} /* Indigo */
#blinks {
  color: #c2410c;
} /* Orange */
#wordsSpoken {
  color: #be185d;
} /* Pink */
#bloodPumped {
  color: #dc2626;
} /* Red */
#mealsEaten {
  color: #16a34a;
} /* Green */
#mercuryAge {
  color: #f59e0b;
} /* Amber */
#venusAge {
  color: #ef4444;
} /* Red */
#marsAge {
  color: #dc2626;
} /* Dark Red */
#jupiterAge {
  color: #f97316;
} /* Orange */
#saturnAge {
  color: #eab308;
} /* Yellow */
#uranusAge {
  color: #06b6d4;
} /* Cyan */
#neptuneAge {
  color: #3b82f6;
} /* Blue */
#countdownDays {
  color: #dc2626;
} /* Red */
#countdownHours {
  color: #ea580c;
} /* Orange */
#countdownMinutes {
  color: #16a34a;
} /* Green */
#countdownSeconds {
  color: #2563eb;
} /* Blue */

/* Utility Classes */
.text-center {
  text-align: center;
}
.hidden {
  display: none;
}
.flex {
  display: flex;
}
.items-center {
  align-items: center;
}
.justify-center {
  justify-content: center;
}
.gap-4 {
  gap: var(--space-4);
}
.mb-4 {
  margin-bottom: var(--space-4);
}
.mb-6 {
  margin-bottom: var(--space-6);
}
.mt-8 {
  margin-top: var(--space-8);
}

/* Loading States */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid transparent;
  border-top: 2px solid currentColor;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

/* Animations */
.fade-in {
  animation: fadeIn 0.6s ease-out;
}

.slide-up {
  animation: slideUp 0.6s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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



/* === EXPERT VALIDATION SECTION === */
.expert-validation-section {
    background: linear-gradient(135deg, #065F46 0%, #047857 50%, #059669 100%);
    padding: var(--space-16) 0;
    color: white;
}

.validation-content {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.validation-header {
    margin-bottom: var(--space-12);
}

.validation-title {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--space-6);
    color: white;
}

.verification-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: rgba(255, 255, 255, 0.2);
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-full);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

.badge-text {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
}

.professor-endorsement {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 4px;
    padding: var(--space-4);
    margin: var(--space-4) 0;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.professor-image {
    flex-shrink: 0;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.professor-photo {
    width: 150px;
    height: 150px;
    border-radius: 100px;
    object-fit: cover;
}

.linkedin-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: white;
    border-radius: 4px;
    transition: opacity 0.2s;
}

.linkedin-link:hover {
    opacity: 0.8;
}

.endorsement-content {
    flex: 1;
    min-width: 0;
}

.professor-quote {
    font-size: 1rem;
    color: #fff;
    line-height: 1.4;
    margin: 0 0 var(--space-2) 0;
    font-style: italic;
    font-style: italic;
}

.professor-info {
    margin-top: var(--space-1);
}

.validation-buttons {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.validation-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--font-size-xs);
    color: #052e12;
    background: rgba(255, 255, 255, 0.9);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

.check-icon {
    background: #10B981;
    color: white;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
}

.professor-name {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: #052e12;
    margin-bottom: var(--space-1);
}

.professor-title {
    font-size: var(--font-size-base);
    color: #eee;
}

.validation-checkpoints {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-4);
    margin-top: var(--space-8);
}

.checkpoint {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--space-4);
    border-radius: var(--radius-base);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.checkpoint-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: #10B981;
    border-radius: 50%;
    color: white;
    font-weight: var(--font-weight-bold);
    flex-shrink: 0;
}

.checkpoint-text {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
}


@media (max-width: 768px) {
    .professor-endorsement {
        flex-direction: column;
        max-height: none;
        padding: 1rem;
        background: white;
        border-radius: 4px;
        border: 1px solid #A7F3D0;
        margin-top: 1rem;
        gap: var(--space-3);
        text-align: center;
    }
}

@media (max-width: 768px) {
    .validation-content * {
        color: #052e12 !important;
    }
}

@media (max-width: 768px) {
    .professor-endorsement, .educational-description {
        padding: var(--space-6);
        margin: var(--space-6) 0;
    }
}