/* ============================================================
   Ru's Science Cafe — design tokens
   Palette pulled from the real logo (navy #0c447c, slate #5f5e5a)
   plus a warm amber accent lifted from the test-tube mark.
   ============================================================ */
:root{
  --navy: #0c447c;
  --navy-deep: #082e56;
  --sky: #185fa5;
  --slate: #5f5e5a;
  --ink: #12202b;
  --paper: #f5f8fb;
  --paper-warm: #fbf9f4;
  --line: #d9e2ec;
  --amber: #d6971f;
  --amber-deep: #b57a12;
  --white: #ffffff;

  --font-display: "Fraunces", "Iowan Old Style", serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;

  --radius: 14px;
  --radius-sm: 8px;
  --shadow-soft: 0 12px 32px -16px rgba(12,68,124,0.28);
  --shadow-lift: 0 20px 44px -18px rgba(12,68,124,0.35);
  --max: 1180px;
}

@media (prefers-color-scheme: dark){ :root{ color-scheme: light; } }

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  line-height: 1.55;
}
img{ max-width:100%; display:block; }
a{ color: inherit; }
h1,h2,h3,h4{
  font-family: var(--font-display);
  color: var(--navy-deep);
  line-height: 1.12;
  margin: 0 0 .5em;
  font-weight: 600;
}
p{ margin: 0 0 1em; color: #33454f; }
.container{ max-width: var(--max); margin: 0 auto; padding: 0 24px; }
.eyebrow{
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .72rem;
  color: var(--amber-deep);
  font-weight: 600;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.eyebrow::before{
  content:"";
  width:18px; height:2px;
  background: var(--amber);
  display:inline-block;
}
:focus-visible{ outline: 3px solid var(--amber); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce){
  *{ animation-duration: .001ms !important; animation-iteration-count: 1 !important; transition-duration: .001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  font-family: var(--font-body); font-weight: 600; font-size: .95rem;
  padding: 13px 26px; border-radius: 999px; border: 2px solid transparent;
  cursor:pointer; text-decoration:none; transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
  white-space: nowrap;
}
.btn-primary{ background: var(--navy); color:#fff; box-shadow: var(--shadow-soft); }
.btn-primary:hover{ background: var(--navy-deep); transform: translateY(-2px); box-shadow: var(--shadow-lift); }
.btn-amber{ background: var(--amber); color: var(--navy-deep); box-shadow: 0 12px 26px -14px rgba(214,151,31,.6); }
.btn-amber:hover{ background: var(--amber-deep); color:#fff; transform: translateY(-2px); }
.btn-ghost{ background: transparent; border-color: rgba(12,68,124,.25); color: var(--navy); }
.btn-ghost:hover{ border-color: var(--navy); background: rgba(12,68,124,.06); }
.btn-block{ width:100%; }
.btn[disabled]{ opacity:.6; cursor:not-allowed; transform:none !important; }

/* ---------- Header / nav ---------- */
header.site{
  position: sticky; top:0; z-index: 50;
  background: rgba(245,248,251,.86); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav-row{ display:flex; align-items:center; justify-content:space-between; padding: 12px 0; }
.brand{ display:flex; align-items:center; gap:10px; text-decoration:none; }
.brand img{ height: 40px; width:auto; }
.brand-text{ font-family: var(--font-display); font-weight:600; font-size:1.05rem; color: var(--navy-deep); }
nav.links{ display:flex; align-items:center; gap: 28px; }
nav.links a{
  text-decoration:none; color: var(--ink); font-weight:500; font-size:.95rem;
  position:relative; padding: 4px 0;
}
nav.links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:-2px; height:2px; background: var(--amber);
  transition: right .2s ease;
}
nav.links a:hover::after, nav.links a[aria-current="page"]::after{ right:0; }
nav.links a[aria-current="page"]{ color: var(--navy-deep); font-weight:700; }
.nav-cta{ display:flex; align-items:center; gap:14px; }
.nav-toggle{ display:none; background:none; border:none; cursor:pointer; padding:6px; }
.nav-toggle span{ display:block; width:24px; height:2px; background: var(--navy-deep); margin:5px 0; border-radius:2px; }

@media (max-width: 880px){
  nav.links{
    position:fixed; inset: 64px 0 0 0; background: var(--paper);
    flex-direction:column; justify-content:flex-start; align-items:flex-start;
    padding: 32px 24px; gap: 22px; transform: translateX(100%);
    transition: transform .25s ease; overflow-y:auto;
  }
  nav.links.open{ transform: translateX(0); }
  nav.links a{ font-size:1.2rem; }
  .nav-toggle{ display:block; }
  .nav-cta .btn-ghost{ display:none; }
}

/* ---------- Hero ---------- */
.hero{
  position: relative; overflow: hidden;
  background: radial-gradient(circle at 15% -10%, rgba(24,95,165,.16), transparent 55%),
              radial-gradient(circle at 100% 0%, rgba(214,151,31,.14), transparent 45%),
              var(--paper);
  padding: 76px 0 60px;
}
.hero-grid{ display:grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items:center; }
@media (max-width: 900px){ .hero-grid{ grid-template-columns:1fr; } }
.hero h1{ font-size: clamp(2.1rem, 4.6vw, 3.3rem); }
.hero h1 em{ font-style: normal; color: var(--sky); border-bottom: 4px solid var(--amber); }
.tagline{
  font-family: var(--font-display); font-style: italic; font-weight:500;
  font-size: clamp(1.05rem, 1.6vw, 1.3rem); color: var(--amber-deep);
  margin: 0 0 14px; display:flex; align-items:center; gap:10px;
}
.tagline::before{ content:"✧"; color: var(--amber); font-size:1.1em; }
.hero-sub{ font-size: 1.08rem; max-width: 46ch; }
.scroll-hint{
  display:inline-block; margin-top:18px; font-size:.88rem; font-weight:600;
  color: var(--navy); text-decoration:none; border-bottom: 1px dashed var(--sky); padding-bottom:2px;
}
.scroll-hint:hover{ color: var(--sky); }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; margin-top: 22px; }
.hero-badges{ display:flex; gap:22px; margin-top:26px; flex-wrap:wrap; }
.hero-badge{ display:flex; flex-direction:column; max-width: 170px; }
.hero-badge b{ font-family: var(--font-display); font-size:1.25rem; color: var(--navy-deep); line-height:1.15; }
.hero-badge span{ font-size:.76rem; color: var(--slate); font-family: var(--font-mono); text-transform:uppercase; letter-spacing:.04em; line-height:1.3; }

.method-heading{ font-size: clamp(1.7rem, 3.2vw, 2.3rem); }

/* ---- floating lab-glassware signature scene ---- */
.lab-scene{ position:relative; height: 420px; }
.lab-item{ position:absolute; filter: drop-shadow(0 18px 26px rgba(12,68,124,.18)); animation: labFloat ease-in-out infinite; }
.li-1{ width: 30%; left: 8%;  top: 6%;  animation-duration: 7s; }
.li-2{ width: 26%; left: 56%; top: 2%;  animation-duration: 8.5s; animation-delay: .6s; }
.li-3{ width: 46%; left: 30%; top: 54%; animation-duration: 9s;  animation-delay: .3s; }
.li-4{ width: 26%; left: 4%;  top: 58%; animation-duration: 6.5s; animation-delay: 1s; }
@keyframes labFloat{
  0%, 100%{ transform: translateY(0) rotate(0deg); }
  50%{ transform: translateY(-14px) rotate(-2deg); }
}
@media (max-width: 900px){ .lab-scene{ height: 300px; max-width:420px; margin:0 auto; } }
@media (prefers-reduced-motion: reduce){ .lab-item{ animation: none; } }

/* floating molecule canvas */
#molecule-canvas{ position:absolute; inset:0; width:100%; height:100%; pointer-events:none; opacity:.55; }

/* ---------- Sections generic ---------- */
section{ padding: 74px 0; }
.section-head{ max-width: 640px; margin-bottom: 40px; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.alt-bg{ background: var(--white); border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.navy-bg{ background: linear-gradient(160deg, var(--navy-deep), var(--navy)); color:#eaf2fb; }
.navy-bg h2, .navy-bg h3{ color:#fff; }
.navy-bg p{ color:#c9dcee; }

/* ---------- How it works ---------- */
.steps{ display:grid; grid-template-columns: repeat(3,1fr); gap: 26px; counter-reset: step; }
@media (max-width:820px){ .steps{ grid-template-columns:1fr; } }
.step{ background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 28px 24px; position:relative; }
.step::before{
  counter-increment: step; content: counter(step,decimal-leading-zero);
  font-family: var(--font-mono); font-size:.78rem; color: var(--amber-deep); font-weight:700;
  display:block; margin-bottom: 10px; letter-spacing:.08em;
}

/* ---------- Subjects / services cards ---------- */
.cards{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
@media (max-width: 900px){ .cards{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px){ .cards{ grid-template-columns: 1fr; } }
.card{
  background:#fff; border:1px solid var(--line); border-radius: var(--radius);
  padding: 24px; display:flex; flex-direction:column; gap:10px;
  transition: box-shadow .2s ease, transform .2s ease;
}
.card:hover{ box-shadow: var(--shadow-soft); transform: translateY(-3px); }
.card .icon{ width:44px; height:44px; }
.card h3{ font-size:1.15rem; margin-bottom:2px; }
.card .price{ font-family: var(--font-mono); color: var(--navy); font-weight:700; margin-top:auto; }

/* ---------- Pricing table ---------- */
.pricing-table{ width:100%; border-collapse: collapse; background:#fff; border-radius: var(--radius); overflow:hidden; box-shadow: var(--shadow-soft); }
.pricing-table th, .pricing-table td{ padding: 16px 20px; text-align:left; border-bottom:1px solid var(--line); }
.pricing-table th{ font-family: var(--font-mono); text-transform:uppercase; font-size:.72rem; letter-spacing:.06em; color: var(--slate); background: var(--paper); }
.pricing-table tr:last-child td{ border-bottom:none; }
.pricing-table td.rate{ font-family: var(--font-mono); font-weight:700; color: var(--navy); white-space:nowrap; }
.pricing-note{
  margin-top: 18px; padding: 16px 18px; border-radius: var(--radius-sm);
  background: #fff8e8; border:1px dashed var(--amber-deep); font-size:.92rem; color:#5c4408;
}
.pricing-note strong{ color: var(--amber-deep); }

/* ---------- Testimonials ---------- */
.testi-grid{ display:grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
@media (max-width: 900px){ .testi-grid{ grid-template-columns: 1fr; } }
.testi{
  background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 26px;
  display:flex; flex-direction:column; gap: 12px;
}
.testi .stars{ color: var(--amber); letter-spacing: 2px; }
.testi footer{ margin-top:auto; font-size:.85rem; color: var(--slate); font-weight:600; }
.review-cta{
  margin-top: 44px; display:flex; align-items:center; justify-content:space-between; gap:24px;
  background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 26px 30px; flex-wrap:wrap;
}

/* ---------- About ---------- */
.about-grid{ display:grid; grid-template-columns: .85fr 1.15fr; gap: 52px; align-items:start; }
@media (max-width:900px){ .about-grid{ grid-template-columns:1fr; } }
.headshot-wrap{ position:relative; width: min(320px, 100%); margin: 0 auto; }
.headshot-wrap img{
  border-radius: 50%; aspect-ratio:1/1; object-fit:cover; object-position: top center;
  border: 6px solid #fff; box-shadow: var(--shadow-lift);
}
.headshot-ring{
  position:absolute; inset:-14px; border-radius:50%;
  border: 2px dashed rgba(12,68,124,.35);
  animation: spin 30s linear infinite;
}
@keyframes spin{ to{ transform: rotate(360deg); } }
.timeline{ list-style:none; margin:0; padding:0; border-left:2px solid var(--line); }
.timeline li{ position:relative; padding: 4px 0 22px 26px; }
.timeline li::before{
  content:""; position:absolute; left:-7px; top:6px; width:12px; height:12px; border-radius:50%;
  background: var(--amber); border: 3px solid var(--paper); box-shadow:0 0 0 2px var(--amber);
}
.timeline b{ color: var(--navy-deep); }

.creds{ display:grid; grid-template-columns: repeat(2,1fr); gap:14px; margin-top: 18px; }
.cred{ display:flex; gap:10px; align-items:flex-start; background:#fff; border:1px solid var(--line); border-radius: var(--radius-sm); padding:14px; }
.cred svg{ flex:none; width:22px; height:22px; color: var(--navy); }
.cred span{ font-size:.9rem; }

/* ---------- Contact / booking ---------- */
.contact-grid{ display:grid; grid-template-columns: 1fr 1.2fr; gap: 44px; align-items:start; }
@media (max-width: 940px){ .contact-grid{ grid-template-columns:1fr; } }
.contact-info .item{ display:flex; gap:14px; align-items:flex-start; margin-bottom:20px; }
.contact-info .item svg{ flex:none; width:22px; height:22px; color: var(--amber-deep); margin-top:3px; }
.contact-info a{ color: var(--navy); text-decoration:none; font-weight:600; }
.contact-info a:hover{ text-decoration:underline; }

form.booking{ background:#fff; border:1px solid var(--line); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow-soft); }
.form-row{ display:grid; grid-template-columns: 1fr 1fr; gap:16px; }
@media (max-width:560px){ .form-row{ grid-template-columns:1fr; } }
.field{ margin-bottom: 18px; }
.field label{ display:block; font-size:.85rem; font-weight:600; margin-bottom:6px; color: var(--navy-deep); }
.field small{ display:block; color: var(--slate); font-size:.78rem; margin-top:4px; }
.field input, .field select, .field textarea{
  width:100%; padding: 12px 14px; border-radius: var(--radius-sm); border: 1.5px solid var(--line);
  font-family: var(--font-body); font-size: .95rem; background: var(--paper); color: var(--ink);
  transition: border-color .15s ease, background .15s ease;
}
.field input:focus, .field select:focus, .field textarea:focus{ border-color: var(--sky); background:#fff; outline:none; }
.field.invalid input, .field.invalid select, .field.invalid textarea{ border-color:#c0392b; background:#fff5f4; }
.error-msg{ color:#c0392b; font-size:.78rem; margin-top:4px; display:none; }
.field.invalid .error-msg{ display:block; }
.form-status{ margin-top:14px; padding: 12px 14px; border-radius: var(--radius-sm); font-size:.9rem; display:none; }
.form-status.show{ display:block; }
.form-status.ok{ background:#eaf7ec; color:#1e6b2f; border:1px solid #bfe3c4; }
.form-status.err{ background:#fdecea; color:#a02622; border:1px solid #f3c2bd; }
.consent{ display:flex; gap:10px; align-items:flex-start; font-size:.85rem; margin: 6px 0 20px; }
.consent input{ width:auto; margin-top:3px; }

/* ---------- FAQ ---------- */
details.faq{ background:#fff; border:1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 20px; margin-bottom:12px; }
details.faq summary{ cursor:pointer; font-weight:600; color: var(--navy-deep); list-style:none; display:flex; justify-content:space-between; align-items:center; }
details.faq summary::-webkit-details-marker{ display:none; }
details.faq summary::after{ content:"+"; font-size:1.3rem; color: var(--amber-deep); }
details.faq[open] summary::after{ content:"–"; }
details.faq p{ margin-top:12px; }

/* ---------- Footer ---------- */
footer.site{ background: var(--navy-deep); color:#cfe0f0; padding: 48px 0 26px; }
footer.site p{ color:#b9cfe4; }
.footer-grid{ display:grid; grid-template-columns: 1.4fr 1fr 1fr; gap:34px; }
@media (max-width:760px){ .footer-grid{ grid-template-columns:1fr; } }
footer.site a{ color:#cfe0f0; text-decoration:none; }
footer.site a:hover{ text-decoration:underline; }
footer.site h4{ color:#fff; font-family: var(--font-mono); text-transform:uppercase; font-size:.78rem; letter-spacing:.08em; margin-bottom: 14px; }
footer.site ul{ list-style:none; margin:0; padding:0; }
footer.site li{ margin-bottom:10px; font-size:.92rem; }
.footer-bottom{ margin-top:34px; padding-top:22px; border-top:1px solid rgba(255,255,255,.14); font-size:.8rem; color:#9fb8cf; display:flex; justify-content:space-between; flex-wrap:wrap; gap:8px; }

/* reveal on scroll */
.reveal{ opacity:0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:none; }

.skip-link{ position:absolute; left:-999px; top:0; background:var(--navy); color:#fff; padding:10px 16px; z-index:100; border-radius: 0 0 8px 0; }
.skip-link:focus{ left:0; }