:root {
  --primary: #0F766E;
  --primary-light: #14B8A6;
  --secondary: #B45309;
  --dark: #0F172A;
  --gray: #64748B;
  --light: #F8FAFC;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --radius: 16px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--dark);
  background: var(--white);
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

/* NAV */
nav {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  padding: 0 24px;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--dark);
  text-decoration: none;
}

.nav-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
}

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

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

/* HERO */
.hero {
  padding: 120px 24px 80px;
  background: linear-gradient(160deg, #F0FDFA 0%, #FFFFFF 60%);
  text-align: center;
}

.hero-inner {
  max-width: 780px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(15,118,110,0.1);
  color: var(--primary);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  color: var(--dark);
}

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

.hero p {
  font-size: 1.15rem;
  color: var(--gray);
  max-width: 560px;
  margin: 0 auto 36px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: white;
  border: none;
}

.btn-primary:hover {
  background: #0D6B63;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(15,118,110,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
  margin-left: 12px;
}

.btn-outline:hover {
  background: rgba(15,118,110,0.06);
  text-decoration: none;
}

.hero-mockup {
  margin-top: 56px;
  display: flex;
  justify-content: center;
  gap: 16px;
}

.mockup-phone {
  width: 180px;
  height: 360px;
  background: var(--dark);
  border-radius: 28px;
  border: 6px solid #1E293B;
  box-shadow: 0 24px 64px rgba(0,0,0,0.18);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.15);
  font-size: 0.8rem;
  text-align: center;
  padding: 12px;
  position: relative;
  overflow: hidden;
}

.mockup-phone::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(160deg, rgba(15,118,110,0.2), transparent);
}

.mockup-phone.center {
  transform: scale(1.06);
  z-index: 1;
}

/* FEATURES */
.features {
  padding: 80px 24px;
  background: var(--white);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-label {
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.section-sub {
  text-align: center;
  color: var(--gray);
  max-width: 520px;
  margin: 0 auto 52px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--light);
  transition: box-shadow 0.2s, transform 0.2s;
}

.feature-card:hover {
  box-shadow: 0 8px 32px rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--gray);
  line-height: 1.6;
}

/* HOW IT WORKS */
.how {
  padding: 80px 24px;
  background: #F0FDFA;
}

.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 32px;
  margin-top: 52px;
}

.step {
  text-align: center;
}

.step-num {
  width: 52px;
  height: 52px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 800;
  margin: 0 auto 16px;
}

.step h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* CTA */
.cta {
  padding: 80px 24px;
  text-align: center;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  color: white;
}

.cta h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta p {
  font-size: 1.05rem;
  opacity: 0.88;
  margin-bottom: 36px;
}

.btn-white {
  background: white;
  color: var(--primary);
  border: none;
}

.btn-white:hover {
  background: #F0FDFA;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}

/* FOOTER */
footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 40px 24px;
  text-align: center;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 20px;
  list-style: none;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: white;
  text-decoration: none;
}

.footer-copy {
  font-size: 0.85rem;
}

/* RESPONSIVE */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hero-mockup { gap: 8px; }
  .mockup-phone { width: 130px; height: 260px; }
  .btn-outline { margin-left: 0; margin-top: 12px; }
  .hero .btn-group { display: flex; flex-direction: column; align-items: center; gap: 12px; }
}