:root{
  --bg: #f6f2ea;
  --text: #13161a;
  --muted: #4b5563;
  --line: rgba(19,22,26,0.12);

  --dark: #0c0f12;
  --dark-text: #f4f6f8;
  --dark-muted: rgba(244,246,248,0.78);
  --dark-line: rgba(244,246,248,0.14);

  --accent: #0b7285;
  --accent-2: #c76d4f;

  --radius: 14px;
  --shadow: 0 8px 24px rgba(0,0,0,0.08);
  --max: 1120px;
}

*{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
}

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

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 20px;
}

header{
  background: var(--dark);
  color: var(--dark-text);
  border-bottom: 1px solid var(--dark-line);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding: 14px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width: 240px;
}

.logo{
  width: 46px;
  height: 46px;
  border-radius: 12px;
  overflow: hidden;
  display:flex;
  align-items:center;
  justify-content:center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--dark-line);
}

.logo img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand-title{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.brand-title strong{
  font-weight: 700;
  letter-spacing: 0.2px;
}

.brand-title span{
  color: var(--dark-muted);
  font-size: 13px;
}

nav{
  display:flex;
  flex-wrap:wrap;
  gap: 14px;
  justify-content:flex-end;
}

nav a{
  color: var(--dark-text);
  font-size: 14px;
  opacity: 0.92;
  padding: 8px 10px;
  border-radius: 10px;
}
nav a:hover{
  background: rgba(255,255,255,0.06);
  text-decoration:none;
}

.hero{
  background: linear-gradient(180deg, rgba(12,15,18,1) 0%, rgba(12,15,18,0.98) 52%, rgba(246,242,234,1) 100%);
  color: var(--dark-text);
  padding: 56px 0 42px;
}

.hero-grid{
  display:grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 26px;
  align-items: start;
}

.hero h1{
  margin:0 0 10px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.15;
  letter-spacing: -0.3px;
}

.hero p{
  margin: 0 0 14px;
  color: var(--dark-muted);
  font-size: 16px;
  max-width: 66ch;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  border-radius: 12px;
  padding: 11px 14px;
  font-weight: 650;
  font-size: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
}

.btn-primary{
  background: var(--accent);
  color: white;
  border-color: rgba(255,255,255,0.15);
}
.btn-primary:hover{ filter: brightness(0.98); text-decoration:none; }

.btn-ghost{
  background: transparent;
  border-color: var(--line);
  color: var(--text);
}
.btn-ghost:hover{ background: rgba(19,22,26,0.04); text-decoration:none; }

.hero .btn-ghost{
  background: rgba(255,255,255,0.06);
  border-color: var(--dark-line);
  color: var(--dark-text);
}
.hero .btn-ghost:hover{ background: rgba(255,255,255,0.10); text-decoration:none; }

.hero-card{
  border: 1px solid var(--dark-line);
  background: rgba(255,255,255,0.05);
  border-radius: var(--radius);
  padding: 16px;
}
.hero-card h3{
  margin:0 0 8px;
  font-size: 14px;
  letter-spacing: 0.2px;
}
.hero-card p{
  margin:0 0 10px;
  font-size: 14px;
  color: var(--dark-muted);
}
.pills{
  display:flex;
  flex-wrap:wrap;
  gap: 8px;
}
.pill{
  font-size: 12px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--dark-line);
  background: rgba(255,255,255,0.04);
  color: var(--dark-text);
}

section{
  padding: 42px 0;
}

.section-title{
  margin: 0 0 14px;
  font-size: 22px;
  letter-spacing: -0.2px;
}
.lead{
  color: var(--muted);
  margin: 0 0 18px;
  max-width: 76ch;
}

.grid-2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.card{
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
}

.card h3{
  margin:0 0 8px;
  font-size: 16px;
}

.card p{
  margin:0;
  color: var(--muted);
}

.book-list{
  margin: 12px 0 0;
  padding-left: 18px;
  color: var(--muted);
}
.book-list li{ margin: 6px 0; }
.book-list a{ font-weight: 650; }

.callout{
  border-left: 3px solid var(--accent);
  padding: 10px 14px;
  background: rgba(11,114,133,0.06);
  border-radius: 12px;
}

hr.sep{
  border: none;
  border-top: 1px solid var(--line);
  margin: 22px 0;
}

.form{
  margin-top: 16px;
  display:flex;
  flex-direction:column;
  gap: 14px;
}

.q{
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.65);
}

.q label{
  display:block;
  font-weight: 650;
  margin-bottom: 8px;
}

.range-row{
  display:flex;
  align-items:center;
  gap: 10px;
}
.range-row input[type="range"]{
  width: 100%;
}
.range-value{
  width: 42px;
  text-align:right;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.form-actions{
  display:flex;
  flex-wrap:wrap;
  gap: 10px;
  align-items:center;
  margin-top: 6px;
}

input[type="email"], input[type="text"]{
  width: min(520px, 100%);
  padding: 11px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: white;
  font-size: 14px;
}

.small{
  font-size: 13px;
  color: var(--muted);
  margin-top: 8px;
}

.result{
  border: 1px dashed rgba(19,22,26,0.28);
  border-radius: 14px;
  padding: 14px;
  background: rgba(255,255,255,0.70);
  margin-top: 10px;
}
.result strong{ color: var(--text); }
.result p{ margin: 6px 0 0; color: var(--muted); }

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.diag-card{
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
  display:flex;
  flex-direction:column;
  gap: 8px;
}

.diag-card .tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size: 12px;
  color: var(--muted);
}
.diag-card h3{
  margin:0;
  font-size: 16px;
  line-height: 1.25;
}
.diag-card p{
  margin:0;
  color: var(--muted);
}
.diag-card a{
  margin-top: 6px;
  font-weight: 650;
}

footer{
  background: var(--dark);
  color: var(--dark-text);
  border-top: 1px solid var(--dark-line);
  padding: 26px 0;
}
footer p{
  margin: 0;
  color: var(--dark-muted);
  font-size: 13px;
}

@media (max-width: 920px){
  .hero-grid{ grid-template-columns: 1fr; }
  .cards{ grid-template-columns: repeat(2, 1fr); }
  .grid-2{ grid-template-columns: 1fr; }
}
@media (max-width: 560px){
  nav{ gap: 6px; }
  nav a{ padding: 7px 8px; }
  .cards{ grid-template-columns: 1fr; }
}

/* Contact fields for diagnostic form */
.contact-fields{
    margin-top: 24px;
    padding: 20px;
    background: var(--bg);
    border-radius: var(--radius);
    border: 1px solid var(--line);
}
.contact-fields p{
    margin-bottom: 16px;
}
.field-row{
    margin-bottom: 14px;
}
.field-row label{
    display: block;
    font-size: 14px;
    margin-bottom: 6px;
    color: var(--text);
}
.field-row input{
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 6px;
    font-size: 15px;
    background: #fff;
}
.field-row input:focus{
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(11,114,133,0.1);
}