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

:root {
  --color-primary: #14B8A6;
  --color-primary-dark: #0F766E;
  --color-secondary: #F0FDFA;
  --color-accent: #F59E0B;
  --color-text: #0F172A;
  --color-text-light: #64748B;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F8FAFC;
  --color-border: #E2E8F0;
  --font-main: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --max-width: 1100px;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  display: block;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  padding: 16px 0;
}

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

.nav-logo {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-logo:hover {
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: var(--color-text-light);
  font-size: 0.95rem;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-primary);
  text-decoration: none;
}

/* Hero */
.hero {
  padding: 100px 0 80px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-bg) 100%);
}

.hero h1 {
  font-size: 3.2rem;
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--color-text);
}

.hero h1 span {
  color: var(--color-primary);
}

.hero p {
  font-size: 1.25rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto 40px;
}

.hero-cta {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

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

.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  text-decoration: none;
}

/* Store Buttons */
.btn-store {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 12px 24px;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn-store:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-store-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.2;
}

.btn-store-text small {
  font-size: 0.65rem;
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.btn-apple {
  background: #000;
  color: #fff;
}

.btn-apple:hover {
  background: #1a1a1a;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

.btn-google {
  background: #000;
  color: #fff;
}

.btn-google:hover {
  background: #1a1a1a;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

/* Features */
.features {
  padding: 80px 0;
}

.features h2 {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.features .subtitle {
  text-align: center;
  color: var(--color-text-light);
  font-size: 1.1rem;
  margin-bottom: 60px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 32px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: 0 8px 24px rgba(20, 184, 166, 0.08);
  transform: translateY(-2px);
  border-color: var(--color-primary);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* How It Works */
.how-it-works {
  padding: 80px 0;
  background: var(--color-bg-alt);
}

.how-it-works h2 {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 60px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  max-width: 900px;
  margin: 0 auto;
}

.step {
  text-align: center;
  padding: 24px;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.step h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.step p {
  color: var(--color-text-light);
  font-size: 0.9rem;
}

/* FAQ Section */
.faq-section {
  padding: 80px 0;
}

.faq-section h2 {
  text-align: center;
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 48px;
}

.faq-list {
  max-width: 700px;
  margin: 0 auto;
}

.faq-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-item h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-text);
}

.faq-item p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* CTA Section */
.cta-section {
  padding: 80px 0;
  text-align: center;
  background: var(--color-bg-alt);
}

.cta-section h2 {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--color-text-light);
  font-size: 1.1rem;
  margin-bottom: 32px;
}

/* Footer */
.footer {
  background: var(--color-text);
  color: #CBD5E0;
  padding: 48px 0 24px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand h3 {
  color: #fff;
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: 0.9rem;
  line-height: 1.6;
}

.footer-links h4 {
  color: #fff;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 12px;
}

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #CBD5E0;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-bottom {
  border-top: 1px solid #4A5568;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
}

/* Page Styles (Terms, Privacy, Support) */
.page-header {
  padding: 60px 0 40px;
  background: var(--color-secondary);
  text-align: center;
}

.page-header h1 {
  font-size: 2.4rem;
  font-weight: 700;
}

.page-header p {
  color: var(--color-text-light);
  margin-top: 8px;
}

.page-content {
  padding: 60px 0;
  max-width: 780px;
  margin: 0 auto;
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 12px;
}

.page-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-top: 28px;
  margin-bottom: 8px;
}

.page-content p {
  margin-bottom: 16px;
  color: var(--color-text);
}

.page-content ul, .page-content ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.page-content li {
  margin-bottom: 8px;
  color: var(--color-text);
}

/* Support Page */
.support-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin: 40px 0;
}

.support-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}

.support-card .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.support-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.support-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1.05rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .nav-links {
    gap: 16px;
  }

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

@media (max-width: 480px) {
  .hero {
    padding: 60px 0 50px;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

  .nav-links {
    display: none;
  }

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

  .btn-store {
    width: 100%;
    max-width: 220px;
    justify-content: center;
  }
}