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

:root {
  --teal:        #3AADA8;
  --teal-dark:   #2A8785;
  --teal-deeper: #1E6C6A;
  --teal-pale:   #EAF6F5;
  --teal-light:  #C5E8E6;
  --bg:          #F6FAFA;
  --white:       #FFFFFF;
  --text:        #1A2E2D;
  --text-muted:  #5A7372;
  --border:      #D8ECEB;
  --font-head:   'Raleway', sans-serif;
  --font-body:   'Open Sans', sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font-body); color: var(--text); background: var(--bg); line-height: 1.7; -webkit-font-smoothing: antialiased; }

nav {
  position: sticky; top: 0; z-index: 100;
  padding: 0 2rem; height: 68px;
  display: flex; align-items: center; justify-content: space-between;
  background: rgba(255,255,255,.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(58,173,168,.1);
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo img { height: 44px; width: auto; display: block; }
.nav-back {
  font-family: var(--font-head); font-size: .88rem; font-weight: 500;
  color: var(--text-muted); text-decoration: none;
  display: flex; align-items: center; gap: .4rem;
  transition: color .2s;
}
.nav-back:hover { color: var(--teal); }
.nav-back svg { width: 16px; height: 16px; fill: currentColor; }

main { max-width: 780px; margin: 0 auto; padding: 3.5rem 2rem 5rem; }

.page-header { margin-bottom: 3rem; padding-bottom: 1.5rem; border-bottom: 2px solid var(--teal-light); }
.page-header .label {
  font-family: var(--font-head); font-size: .75rem; font-weight: 700;
  letter-spacing: .15em; text-transform: uppercase; color: var(--teal-deeper);
  margin-bottom: .5rem;
}
.page-header h1 {
  font-family: var(--font-head); font-size: clamp(1.7rem, 4vw, 2.4rem);
  font-weight: 700; color: var(--text); line-height: 1.2;
  margin-bottom: .6rem;
}
.page-header p { font-size: .88rem; color: var(--text-muted); }

.prose section { margin-bottom: 2.5rem; }
.prose h2 {
  font-family: var(--font-head); font-size: 1.15rem; font-weight: 700;
  color: var(--text); margin-bottom: .8rem;
  padding-left: .9rem; border-left: 3px solid var(--teal);
}
.prose h3 {
  font-family: var(--font-head); font-size: 1rem; font-weight: 600;
  color: var(--text); margin: 1.2rem 0 .5rem;
}
.prose p { font-size: .95rem; color: var(--text-muted); margin-bottom: .9rem; }
.prose p:last-child { margin-bottom: 0; }
.prose ul { margin: .5rem 0 .9rem 1.2rem; }
.prose ul li { font-size: .95rem; color: var(--text-muted); margin-bottom: .3rem; }
.prose a { color: var(--teal-dark); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--teal-deeper); }
.prose strong { color: var(--text); font-weight: 600; }

.info-box {
  background: white; border: 1px solid var(--border);
  border-left: 4px solid var(--teal);
  border-radius: 8px; padding: 1.4rem 1.6rem;
  margin-bottom: .9rem;
}
.info-box p { margin-bottom: .3rem; }

footer {
  background: var(--text); color: rgba(255,255,255,.5);
  padding: 1.8rem 2rem; text-align: center;
  font-size: .82rem;
}
footer a { color: rgba(255,255,255,.6); text-decoration: none; margin: 0 .6rem; }
footer a:hover { color: var(--teal-light); }

@media (max-width: 600px) {
  main { padding: 2rem 1.2rem 4rem; }
  nav { padding: 0 1.2rem; }
}