:root {
  --primary: #0F766E;
  --primary-dark: #115E59;
  --accent: #38BDF8;
  --accent-soft: #E0F2FE;
  --neutral: #334155;
  --neutral-soft: #64748B;
  --bg: #F8FAFC;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --radius: 12px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--neutral);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

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

/* ---------- Logo ---------- */
.logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.logo img {
  height: 36px;
  width: auto;
  display: block;
}

/* ---------- Loading state ---------- */
#loading {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.4s ease, visibility 0.4s ease;
}

#loading img {
  width: 56px;
  height: 56px;
  opacity: 0.8;
  animation: breathe 1.4s ease-in-out infinite;
}

#loading.done {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

@keyframes breathe {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.12); }
}

/* ---------- Header ---------- */
header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
  font-weight: 500;
}

.nav-links a {
  color: var(--neutral-soft);
  transition: color 0.2s;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--primary));
  color: var(--white);
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.35);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(15, 118, 110, 0.45);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}

.btn-outline:hover {
  background: rgba(15, 118, 110, 0.06);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* ---------- Hero ---------- */
.hero {
  padding: 96px 0 72px;
  text-align: center;
  background:
    radial-gradient(800px 400px at 15% -10%, rgba(56, 189, 248, 0.12), transparent 60%),
    radial-gradient(700px 380px at 85% -20%, rgba(15, 118, 110, 0.12), transparent 60%),
    var(--bg);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.badge .icon {
  width: 18px;
  height: 18px;
  display: block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--neutral);
  max-width: 760px;
  margin: 0 auto 20px;
}

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

.hero h1 .accent-word {
  color: var(--accent);
}

.hero .sub {
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  color: var(--neutral-soft);
  max-width: 620px;
  margin: 0 auto 36px;
}

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

.hero .footnote {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--neutral-soft);
}

/* ---------- Sections ---------- */
section {
  padding: 80px 0;
}

.section-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.7rem, 3.5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--neutral);
  margin-bottom: 16px;
}

.section-intro {
  font-size: 1.05rem;
  color: var(--neutral-soft);
  max-width: 640px;
  margin-bottom: 48px;
}

/* ---------- Who it's for ---------- */
.who-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
}

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

.card:hover {
  transform: translateY(-3px);
  border-color: rgba(56, 189, 248, 0.5);
}

.card .icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--accent-soft), rgba(15, 118, 110, 0.12));
}

.card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--neutral);
  margin-bottom: 8px;
}

.card p {
  font-size: 0.92rem;
  color: var(--neutral-soft);
}

/* ---------- How it works ---------- */
.steps {
  counter-reset: step;
}

.step {
  counter-increment: step;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 24px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
}

.step:last-child {
  border-bottom: none;
}

.step .num {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--white);
  background: linear-gradient(135deg, var(--accent), var(--primary));
  box-shadow: 0 4px 14px rgba(15, 118, 110, 0.3);
}

.step h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--neutral);
  margin-bottom: 6px;
}

.step p {
  font-size: 0.95rem;
  color: var(--neutral-soft);
  max-width: 640px;
}

/* ---------- CTA ---------- */
.cta {
  text-align: center;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary) 60%, #0EA5E9);
  border-radius: 20px;
  padding: 64px 32px;
  color: var(--white);
  box-shadow: 0 20px 60px rgba(15, 118, 110, 0.35);
}

.cta h2 {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.cta p {
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 32px;
  opacity: 0.92;
}

.cta .btn-primary {
  background: var(--white);
  color: var(--primary-dark);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.cta .btn-primary:hover {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.28);
}

.cta .email-link {
  display: block;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
}

.cta .email-link:hover {
  color: var(--white);
  text-decoration: underline;
}

/* ---------- Contact modal ---------- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(15, 23, 42, 0.55);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 32px 16px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.35);
  max-width: 640px;
  width: 100%;
  padding: 40px 40px 36px;
  position: relative;
  transform: translateY(16px);
  transition: transform 0.25s ease;
}

.modal-backdrop.open .modal {
  transform: translateY(0);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--neutral-soft);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

.modal-close:hover {
  background: var(--neutral);
  color: var(--white);
}

.modal-title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--neutral);
  margin-bottom: 8px;
}

.modal-sub {
  font-size: 0.95rem;
  color: var(--neutral-soft);
  margin-bottom: 28px;
}

.contact-form .field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.contact-form .field {
  margin-bottom: 18px;
}

.contact-form label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--neutral);
  margin-bottom: 6px;
}

.contact-form label .opt {
  font-weight: 400;
  color: var(--neutral-soft);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-family: inherit;
  font-size: 0.95rem;
  color: var(--neutral);
  background: var(--white);
  transition: border-color 0.2s, box-shadow 0.2s;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.25);
}

.contact-form textarea {
  resize: vertical;
}

.contact-form .btn-submit {
  width: 100%;
  margin-top: 6px;
}

.form-status {
  margin-top: 14px;
  font-size: 0.9rem;
  font-weight: 600;
  text-align: center;
  color: var(--primary);
}

.form-status.error {
  color: #DC2626;
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid var(--border);
  padding: 32px 0;
  margin-top: 40px;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

footer .copyright {
  font-size: 0.85rem;
  color: var(--neutral-soft);
}

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .nav-links {
    display: none;
  }
  .hero {
    padding: 64px 0 48px;
  }
  section {
    padding: 56px 0;
  }
  .step {
    grid-template-columns: 48px 1fr;
    gap: 16px;
  }
  .step .num {
    width: 48px;
    height: 48px;
    font-size: 1.1rem;
  }
  .modal {
    padding: 32px 24px;
  }
  .contact-form .field-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
}