/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --teal:        #1D9E75;
  --teal-dark:   #157a5b;
  --teal-light:  #E8F7F2;
  --text:        #1a1a2e;
  --text-soft:   #4a4a5a;
  --bg:          #ffffff;
  --bg-alt:      #f8fdfb;
  --border:      #d8ede6;
  --radius:      14px;
  --shadow:      0 4px 24px rgba(29,158,117,.10);
}

html { scroll-behavior: smooth; font-size: 18px; }

body {
  font-family: 'Lato', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

h1, h2, h3 {
  font-family: 'Merriweather', serif;
  line-height: 1.3;
  color: var(--text);
}

a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

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

/* =============================================
   LAYOUT
   ============================================= */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 28px;
}

/* =============================================
   BUTTONS
   ============================================= */
.btn {
  display: inline-block;
  padding: 16px 32px;
  border-radius: 50px;
  font-family: 'Lato', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--teal);
  color: #fff;
}
.btn-primary:hover {
  background: var(--teal-dark);
  color: #fff;
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-nav {
  background: var(--teal);
  color: #fff;
  padding: 12px 24px;
  font-size: .9rem;
}
.btn-nav:hover { background: var(--teal-dark); color: #fff; text-decoration: none; }

/* =============================================
   HEADER / NAV
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}

.logo {
  font-family: 'Merriweather', serif;
  font-size: 1.35rem;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}
.logo span { color: var(--teal); }

nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

nav a {
  color: var(--text-soft);
  font-weight: 700;
  font-size: .95rem;
}
nav a:hover { color: var(--teal); text-decoration: none; }

/* =============================================
   HERO
   ============================================= */
.hero {
  background: linear-gradient(160deg, #f0fbf7 0%, #ffffff 60%);
  padding: 96px 0 80px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.eyebrow, .section-eyebrow {
  display: inline-block;
  font-size: .85rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 16px;
}

.hero h1 {
  font-size: 2.6rem;
  margin-bottom: 24px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-soft);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-note {
  margin-top: 14px;
  font-size: .85rem;
  color: var(--text-soft);
}

.hero-image {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 28px;
  box-shadow: var(--shadow);
}

.hero-card-offset { margin-left: 32px; }

.hero-card-icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 10px;
}

.hero-card p {
  font-size: 1rem;
  font-style: italic;
  color: var(--text);
  margin-bottom: 10px;
}

.hero-card-attr {
  font-size: .85rem;
  font-weight: 700;
  color: var(--teal);
}

/* =============================================
   TOPICS
   ============================================= */
.topics {
  padding: 96px 0;
  background: var(--bg);
}

.topics h2, .how-it-works h2, .about h2, .signup h2 {
  font-size: 2.1rem;
  margin-bottom: 14px;
}

.section-sub {
  font-size: 1.1rem;
  color: var(--text-soft);
  margin-bottom: 56px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.topic-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow .2s, transform .2s;
}

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

.card-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.7rem;
  margin-bottom: 20px;
}

.topic-card h3 {
  font-size: 1.2rem;
  margin-bottom: 12px;
}

.topic-card p {
  font-size: .95rem;
  color: var(--text-soft);
  margin-bottom: 20px;
}

.card-link {
  font-size: .9rem;
  font-weight: 700;
  color: var(--teal);
}
.card-link:hover { text-decoration: underline; }

/* =============================================
   HOW IT WORKS
   ============================================= */
.how-it-works {
  background: var(--bg-alt);
  padding: 96px 0;
  text-align: center;
}

.how-it-works .section-sub { margin-bottom: 64px; }

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
}

.step {
  flex: 1;
  max-width: 280px;
  padding: 0 24px;
  text-align: center;
}

.step-number {
  width: 60px;
  height: 60px;
  background: var(--teal);
  color: #fff;
  font-family: 'Merriweather', serif;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}

.step h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
}

.step p {
  font-size: .95rem;
  color: var(--text-soft);
}

.step-arrow {
  font-size: 2rem;
  color: var(--teal);
  opacity: .4;
  padding-top: 12px;
  flex-shrink: 0;
}

/* =============================================
   ABOUT
   ============================================= */
.about {
  padding: 96px 0;
  background: var(--bg);
}

.about-inner {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 72px;
  align-items: start;
}

.photo-placeholder {
  width: 220px;
  height: 220px;
  background: var(--teal-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  border: 4px solid var(--border);
}

.about-text p {
  color: var(--text-soft);
  margin-bottom: 18px;
  font-size: 1.05rem;
}

.about-text p strong { color: var(--text); }

.about-text h2 { margin-bottom: 24px; }

/* =============================================
   SIGNUP
   ============================================= */
.signup {
  background: linear-gradient(135deg, #0e7a5a 0%, var(--teal) 60%, #25c08e 100%);
  padding: 96px 0;
  text-align: center;
  color: #fff;
}

.signup .section-eyebrow { color: rgba(255,255,255,.7); }
.signup h2 { color: #fff; margin-bottom: 14px; }
.signup .section-sub { color: rgba(255,255,255,.85); margin-bottom: 40px; }

.signup-form { max-width: 680px; margin: 0 auto; }

.form-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
}

.form-row input {
  flex: 1;
  min-width: 200px;
  padding: 16px 20px;
  border-radius: 50px;
  border: 2px solid transparent;
  font-family: 'Lato', sans-serif;
  font-size: 1rem;
  outline: none;
  transition: border-color .2s;
}

.form-row input:focus {
  border-color: #fff;
}

.form-row .btn-primary {
  background: #fff;
  color: var(--teal-dark);
  white-space: nowrap;
}
.form-row .btn-primary:hover {
  background: #e8f7f2;
  color: var(--teal-dark);
  transform: translateY(-1px);
}

.form-note {
  margin-top: 16px;
  font-size: .85rem;
  color: rgba(255,255,255,.75);
}

.form-success {
  margin-top: 16px;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  min-height: 1.5em;
}

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--text);
  padding: 36px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.site-footer .logo { color: #fff; }
.site-footer .logo span { color: #6ee7c0; }

.site-footer p {
  font-size: .85rem;
  color: rgba(255,255,255,.6);
}

.site-footer a { color: rgba(255,255,255,.7); }
.site-footer a:hover { color: #fff; }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-image { display: none; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .about-inner { grid-template-columns: 1fr; }
  .photo-placeholder { margin: 0 auto; }
  .steps { flex-direction: column; align-items: center; gap: 32px; }
  .step-arrow { transform: rotate(90deg); }
}

@media (max-width: 600px) {
  html { font-size: 16px; }
  .hero h1 { font-size: 2rem; }
  .card-grid { grid-template-columns: 1fr; }
  nav { gap: 16px; }
  nav a:not(.btn-nav) { display: none; }
  .form-row { flex-direction: column; }
  .form-row input, .form-row .btn { width: 100%; }
  .footer-inner { flex-direction: column; text-align: center; }
}