/* ============================================
   Frontier Crypto - Marketing Website Styles
   Primary Color: #FB8A23
   ============================================ */

:root {
  --primary-color: #FB8A23;
  --primary-dark: #D96F15;
  --primary-light: #FFA852;
  --primary-bg: #FFF5ED;
  --text-dark: #1F2937;
  --text-medium: #6B7280;
  --text-light: #9CA3AF;
  --bg-white: #FFFFFF;
  --bg-light: #F9FAFB;
  --bg-dark: #111827;
  --border-color: #E5E7EB;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--bg-white);
  overflow-x: hidden;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

h1 {
  font-size: clamp(36px, 5vw, 60px);
}

h2 {
  font-size: clamp(28px, 4vw, 42px);
}

h3 {
  font-size: clamp(22px, 3vw, 30px);
}

h4 {
  font-size: 20px;
}

p {
  margin-bottom: 1rem;
  color: var(--text-medium);
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* ============================================
   Header & Navigation
   ============================================ */

header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 1rem 0;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-img {
  width: 50px;
  height: 50px;
  object-fit: contain;
}

.logo-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-menu li a {
  color: var(--text-dark);
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-menu li a:hover {
  color: var(--primary-color);
}

.cta-button {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-block;
}

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

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
  color: var(--text-dark);
}

/* ============================================
   Footer
   ============================================ */

footer {
  background-color: var(--bg-dark);
  color: white;
  padding: 4rem 2rem 2rem;
}

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

.footer-brand {
  text-align: center;
  margin-bottom: 3rem;
}

.footer-logo {
  width: 50px;
  height: 50px;
  margin: 0 auto 1rem;
  display: block;
}

.footer-tagline {
  color: var(--text-light);
  font-size: 14px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-section h4 {
  color: white;
  margin-bottom: 1rem;
  font-size: 16px;
}

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

.footer-section ul li {
  margin-bottom: 0.5rem;
}

.footer-section a {
  color: var(--text-light);
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: white;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-light);
  font-size: 14px;
}

/* ============================================
   Container & Sections
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  margin-bottom: 1rem;
}

.section-title p {
  font-size: 18px;
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-medium);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 8px;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  font-size: 16px;
}

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

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

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

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

.btn-outline {
  background-color: white;
  color: var(--text-dark);
  border: 2px solid var(--border-color);
}

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

/* ============================================
   Cards
   ============================================ */

.card {
  background-color: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

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

.card-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 32px;
}

.card-title {
  font-size: 24px;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.card-text {
  color: var(--text-medium);
  line-height: 1.7;
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-bg) 0%, white 100%);
}

.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 2rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  margin-bottom: 1.5rem;
  color: var(--text-dark);
}

.hero-text .lead {
  font-size: 20px;
  line-height: 1.8;
  color: var(--text-medium);
  margin-bottom: 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-image {
  position: relative;
}

.hero-image img {
  width: 100%;
  height: auto;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
}

/* ============================================
   Features Grid
   ============================================ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 3rem;
}

.feature-card {
  background: white;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: var(--shadow-md);
  transition: all 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 48px;
  margin-bottom: 1.5rem;
}

.feature-title {
  font-size: 22px;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.feature-description {
  color: var(--text-medium);
  line-height: 1.7;
}

/* ============================================
   Stats Section
   ============================================ */

.stats-section {
  background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  color: white;
  padding: 5rem 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 48px;
  margin-bottom: 0.5rem;
  color: white;
}

.stat-item p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
}

/* ============================================
   Form Styles
   ============================================ */

.form-group {
  margin-bottom: 1.5rem;
}

.form-label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: var(--text-dark);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 16px;
  font-family: inherit;
  transition: border-color 0.3s ease;
}

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

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.form-checkbox input[type="checkbox"] {
  margin-top: 0.25rem;
  width: 20px;
  height: 20px;
  cursor: pointer;
}

.form-checkbox label {
  font-size: 14px;
  color: var(--text-medium);
  line-height: 1.5;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .mobile-menu-toggle {
    display: block;
  }

  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: white;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: var(--shadow-md);
    padding: 2rem 0;
    gap: 1rem;
  }

  .nav-menu.active {
    left: 0;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-text {
    text-align: center;
  }

  .hero-buttons {
    justify-content: center;
  }

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

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

  .section {
    padding: 3rem 0;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }
}

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

  h1 {
    font-size: 32px;
  }

  h2 {
    font-size: 28px;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
  }
}

/* Additional responsive styles */
@media (max-width: 768px) {
  .use-cases-grid,
  .about-mission-grid {
    grid-template-columns: 1fr !important;
  }
  
  .contact-container {
    grid-template-columns: 1fr !important;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
  text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.primary-color {
  color: var(--primary-color);
}

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

.bg-light {
  background-color: var(--bg-light);
}

.fade-in {
  animation: fadeIn 0.6s ease-in;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}