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

:root {
  /* Colors based on NERB logo */
  --color-primary: #0ea5e9; /* Blue from logo */
  --color-primary-dark: #0284c7;
  --color-primary-light: #38bdf8;
  --color-black: #000000; /* Black from logo */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;

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

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 3.5rem;
}

body {
  font-family: var(--font-sans);
  color: var(--color-gray-900);
  background-color: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Header Styles */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-200);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 3.5rem;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav-spacer {
  display: none;
}

.nav-links {
  display: none;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-base);
}

.nav-link:hover {
  color: var(--color-gray-900);
}

.nav-cta {
  display: none;
  justify-content: flex-end;
}

.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--color-gray-900);
  padding: var(--spacing-sm);
}

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
}

.mobile-menu {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-gray-200);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.mobile-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  padding: var(--spacing-sm) 0;
  transition: color var(--transition-base);
}

.mobile-link:hover {
  color: var(--color-gray-900);
}

/* Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-gray-900);
  border: 1px solid var(--color-gray-300);
}

.btn-outline:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
}

.btn-full {
  width: 100%;
}

.btn-icon {
  width: 16px;
  height: 16px;
}

/* Hero Section */
.hero-section {
  position: relative;
  min-height: 100vh;
  padding-top: 3.5rem;
  overflow: hidden;
  background-color: var(--color-white);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, var(--color-white) 100%);
}

.hero-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: calc(100vh - 3.5rem);
  padding: var(--spacing-2xl) var(--spacing-md);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 64rem;
}

.hero-logo {
  margin-bottom: var(--spacing-xl);
}

.logo-img {
  width: 200px;
  height: auto;
}

.hero-text {
  max-width: 56rem;
}

.hero-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-lg);
}

.highlight-text {
  position: relative;
  display: inline-block;
}

.highlight-inner {
  position: relative;
  z-index: 10;
}

.highlight-underline {
  position: absolute;
  bottom: -0.25rem;
  left: 0;
  width: 100%;
  height: 0.5rem;
  background-color: rgba(14, 165, 233, 0.2);
}

.hero-subtitle {
  margin-top: var(--spacing-lg);
}

.subtitle-main {
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-md);
}

.subtitle-desc {
  font-size: 1rem;
  color: var(--color-gray-600);
  line-height: 1.6;
  max-width: 42rem;
  margin: 0 auto;
}

.hero-cta {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: var(--spacing-2xl);
  width: 100%;
}

.hero-features {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-3xl);
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.feature-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: none;
  animation: bounce 2s infinite;
}

.scroll-mouse {
  width: 20px;
  height: 32px;
  border: 2px solid var(--color-gray-400);
  border-radius: 12px;
  position: relative;
}

.scroll-wheel {
  width: 6px;
  height: 6px;
  background-color: var(--color-gray-400);
  border-radius: 50%;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
}

@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  40% {
    transform: translateX(-50%) translateY(-10px);
  }
  60% {
    transform: translateX(-50%) translateY(-5px);
  }
}

/* Services Section */
.services-section {
  position: relative;
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-white);
  overflow: hidden;
}

.services-bg-left,
.services-bg-right {
  position: absolute;
  width: 384px;
  height: 384px;
  background-color: rgba(14, 165, 233, 0.05);
  filter: blur(80px);
  border-radius: 50%;
}

.services-bg-left {
  top: 0;
  left: 0;
}

.services-bg-right {
  bottom: 0;
  right: 0;
}

.section-header {
  margin-bottom: var(--spacing-3xl);
}

.section-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-primary);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 9999px;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
  max-width: 48rem;
}

.section-desc {
  font-size: 1.125rem;
  color: var(--color-gray-600);
  max-width: 42rem;
}

.packs-grid {
  display: grid;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-3xl);
}

.pack-card {
  position: relative;
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  background-color: var(--color-white);
  overflow: hidden;
  transition: all var(--transition-base);
}

.pack-card:hover {
  box-shadow: var(--shadow-xl);
  border-color: rgba(14, 165, 233, 0.5);
}

.pack-popular {
  border-color: var(--color-primary);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, var(--color-white) 100%);
}

.popular-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  z-index: 10;
  padding: 0.25rem 0.75rem;
  background-color: var(--color-primary);
  color: var(--color-white);
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-md);
}

.pack-content {
  padding: var(--spacing-xl);
}

.pack-header {
  margin-bottom: var(--spacing-lg);
}

.pack-number {
  font-size: 3.5rem;
  font-weight: 700;
  color: rgba(14, 165, 233, 0.1);
  line-height: 1;
}

.pack-info {
  margin-bottom: var(--spacing-xl);
}

.pack-name {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

.pack-price {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.price-amount {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gray-900);
}

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

.pack-desc {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

.pack-features {
  margin-bottom: var(--spacing-xl);
}

.feature {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.feature-bullet {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
  margin-top: 0.5rem;
  flex-shrink: 0;
}

.feature span {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

.pack-btn {
  margin-top: var(--spacing-xl);
}

.clarification-box {
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-2xl);
  background: linear-gradient(135deg, rgba(14, 165, 233, 0.05) 0%, var(--color-white) 100%);
  padding: var(--spacing-2xl);
}

.clarification-content {
  margin-bottom: var(--spacing-lg);
}

.clarification-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

.clarification-text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
  max-width: 48rem;
}

/* About Section */
.about-section {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-white);
}

.about-header {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto var(--spacing-3xl);
}

.values-grid {
  display: grid;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-3xl);
}

.value-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.value-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-primary);
  margin-bottom: var(--spacing-lg);
}

.value-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

.value-desc {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

.approach-box {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  background-color: var(--color-gray-50);
  padding: var(--spacing-2xl);
}

.approach-content {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto;
}

.approach-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-md);
}

.approach-text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  padding: var(--spacing-3xl) 0;
  background-color: rgba(249, 250, 251, 0.3);
}

.contact-header {
  text-align: center;
  max-width: 42rem;
  margin: 0 auto var(--spacing-3xl);
}

.contact-grid {
  display: grid;
  gap: var(--spacing-2xl);
}

.contact-form-wrapper {
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-2xl);
  background-color: var(--color-white);
  padding: var(--spacing-xl);
}

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

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

.form-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-900);
}

.form-input,
.form-textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--color-gray-900);
  background-color: var(--color-white);
  transition: border-color var(--transition-base);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

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

.contact-info-header {
  margin-bottom: var(--spacing-md);
}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.contact-info-desc {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

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

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.contact-method-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-method-label {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-900);
  margin-bottom: 0.25rem;
}

.contact-method-value {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-decoration: none;
  word-break: break-all;
}

.contact-method-value:hover {
  color: var(--color-primary);
}

.contact-guarantee {
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: var(--radius-lg);
  background-color: rgba(14, 165, 233, 0.05);
  padding: var(--spacing-lg);
}

.guarantee-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-sm);
}

.guarantee-text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* Footer */
.footer {
  border-top: 1px solid var(--color-gray-200);
  background-color: var(--color-white);
  padding: var(--spacing-2xl) 0;
}

.footer-grid {
  display: grid;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-logo {
  width: 120px;
  height: auto;
}

.footer-desc {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-gray-900);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.footer-link {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-base);
}

.footer-link:hover {
  color: var(--color-gray-900);
}

.footer-text {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--color-gray-200);
  text-align: center;
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-gray-600);
}

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

/* Responsive Design */
@media (min-width: 640px) {
  .container {
    padding: 0 var(--spacing-lg);
  }

  .logo-img {
    width: 280px;
  }

  .hero-title {
    font-size: 3rem;
  }

  .hero-cta {
    flex-direction: row;
    width: auto;
  }

  .hero-features {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
  }

  .scroll-indicator {
    display: block;
  }

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

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

  .pack-offset {
    transform: translateY(2rem);
  }

  .values-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

@media (min-width: 768px) {
  .nav-spacer {
    display: block;
  }

  .nav-links {
    display: flex;
  }

  .nav-cta {
    display: flex;
  }

  .mobile-menu-btn {
    display: none;
  }

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

@media (min-width: 1024px) {
  .container {
    padding: 0 var(--spacing-2xl);
  }

  .logo-img {
    width: 400px;
  }

  .hero-title {
    font-size: 4.5rem;
  }

  .section-title {
    font-size: 3rem;
  }

  .footer-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}