/* ============================================================
   Epicentra Health Research (EHR) — Benti Geleta Buli, PhD
   Shared stylesheet
   ============================================================ */

:root{
  --ink:#1B2A4A; --paper:#F7F5F0; --paper-dim:#EFEBE2;
  --teal:#3D7068; --teal-dark:#2B5650;
  --clay:#C25E3A; --clay-dark:#A84E2E;
  --slate:#6B7280; --text:#14181F; --line:rgba(27,42,74,0.14);
}
*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; }
body{
  background:var(--paper);
  color:var(--text);
  font-family:'Inter',system-ui,-apple-system,sans-serif;
  min-height:100vh;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:'Source Serif 4', Georgia, serif;
  color:var(--ink);
  line-height:1.15;
  margin:0 0 .5em 0;
  font-weight:600;
}
p{ line-height:1.65; color:var(--text); margin:0 0 1em 0; }
ul{ margin:0; padding:0; list-style:none; }
a{ color:inherit; text-decoration:none; }
.mono{ font-family:'IBM Plex Mono', monospace; }
.eyebrow{
  font-family:'IBM Plex Mono', monospace;
  text-transform:uppercase;
  letter-spacing:.12em;
  font-size:.72rem;
  color:var(--teal-dark);
  margin:0 0 .9em 0;
  font-weight:500;
}
button, .btn{ font-family:inherit; cursor:pointer; }

/* Nav */
.nav{ position:sticky; top:0; z-index:50; background:rgba(247,245,240,0.92); backdrop-filter:blur(8px); border-bottom:1px solid var(--line); }
.nav-inner{ max-width:1180px; margin:0 auto; padding:14px 28px; display:flex; align-items:center; justify-content:space-between; gap:24px; }
.brand{ display:flex; align-items:center; gap:10px; }
.brand-mark{ width:34px; height:34px; border-radius:8px; background:var(--ink); color:var(--paper); font-family:'Source Serif 4',serif; font-weight:700; font-size:1.1rem; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.brand-text{ font-family:'Source Serif 4',serif; font-weight:600; font-size:1.02rem; color:var(--ink); line-height:1.1; text-align:left; display:flex; flex-direction:column; }
.brand-sub{ font-family:'Inter',sans-serif; font-weight:400; font-size:.66rem; letter-spacing:.04em; color:var(--slate); text-transform:uppercase; margin-top:2px; }
.nav-links{ display:flex; align-items:center; gap:6px; }
.nav-link{ background:none; border:none; font-size:.92rem; padding:8px 14px; border-radius:7px; color:var(--text); }
.nav-link:hover{ background:var(--paper-dim); }
.nav-link.active{ color:var(--teal-dark); font-weight:600; }
.nav-cta{ margin-left:8px; background:var(--ink); color:var(--paper); border:none; padding:9px 18px; border-radius:7px; font-size:.88rem; font-weight:500; display:inline-block; }
.nav-cta:hover{ background:var(--teal-dark); }
.nav-burger{ display:none; flex-direction:column; gap:4px; background:none; border:none; padding:8px; }
.nav-burger span{ width:22px; height:2px; background:var(--ink); display:block; }
.nav-mobile{ display:none; flex-direction:column; padding:8px 20px 16px; gap:2px; border-top:1px solid var(--line); }
.nav-mobile.open{ display:flex; }
.nav-mobile-link{ background:none; border:none; text-align:left; padding:12px 8px; font-size:.98rem; border-radius:6px; display:block; }
.nav-mobile-link.active{ color:var(--teal-dark); font-weight:600; }
.nav-mobile-link.cta{ background:var(--ink); color:var(--paper); margin-top:6px; }

@media (max-width:880px){
  .nav-links{ display:none; }
  .nav-burger{ display:flex; }
  .brand-sub{ display:none; }
}

/* Buttons */
.btn{ border-radius:8px; padding:13px 24px; font-size:.95rem; font-weight:600; border:1px solid transparent; transition:transform .15s ease, background .15s ease; display:inline-block; }
.btn:hover{ transform:translateY(-1px); }
.btn-clay{ background:var(--clay); color:#fff; }
.btn-clay:hover{ background:var(--clay-dark); }
.btn-ghost{ background:transparent; color:var(--ink); border:1px solid var(--line); }
.btn-ghost:hover{ background:var(--paper-dim); }
.btn-paper{ background:var(--paper); color:var(--ink); }
.btn-paper:hover{ background:#fff; }
.btn.back{ margin-top:28px; }

/* Hero */
.hero{ padding:64px 28px 40px; }
.hero-inner{ max-width:1180px; margin:0 auto; display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:center; }
.hero-text h1{ font-size:clamp(2.1rem,4vw,3.1rem); }
.hero-text h1 em{ font-style:italic; color:var(--teal-dark); }
.lede{ font-size:1.08rem; color:var(--slate); max-width:540px; }
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-top:8px; }
.hero-visual{ position:relative; }
.traj-svg{ width:100%; height:auto; display:block; }
@keyframes draw{ to{ stroke-dashoffset:0; } }
@keyframes fadeIn{ to{ opacity:1; } }
.traj-svg path{ animation: draw 1.6s cubic-bezier(.4,0,.2,1) forwards; }
.traj-svg path.p0{ stroke-dasharray:520; stroke-dashoffset:520; animation-delay:0s; }
.traj-svg path.p1{ stroke-dasharray:520; stroke-dashoffset:520; animation-delay:.15s; }
.traj-svg path.p2{ stroke-dasharray:520; stroke-dashoffset:520; animation-delay:.3s; }
.traj-svg circle.dot{ opacity:0; animation: fadeIn .4s forwards; }
.traj-svg circle.dot0{ animation-delay:1.5s; }
.traj-svg circle.dot1{ animation-delay:1.65s; }
.traj-svg circle.dot2{ animation-delay:1.8s; }
.hero-visual-caption{ font-size:.74rem; color:var(--slate); margin-top:10px; line-height:1.5; }

@media (max-width:880px){
  .hero-inner{ grid-template-columns:1fr; gap:32px; }
  .hero{ padding:40px 20px 24px; }
}

/* Stats */
.stats{ border-top:1px solid var(--line); border-bottom:1px solid var(--line); background:var(--paper-dim); }
.stats-inner{ max-width:1180px; margin:0 auto; padding:32px 28px; display:grid; grid-template-columns:repeat(4,1fr); gap:24px; }
.stat-n{ font-family:'Source Serif 4',serif; font-size:1.9rem; color:var(--ink); font-weight:700; }
.stat-l{ font-size:.82rem; color:var(--slate); margin-top:2px; }
@media (max-width:760px){ .stats-inner{ grid-template-columns:repeat(2,1fr); } }

/* Sections */
.section{ padding:72px 28px; }
.section.alt{ background:var(--paper-dim); }
.section-inner{ max-width:1180px; margin:0 auto; }
.section-inner h2{ font-size:clamp(1.5rem,2.6vw,2.1rem); max-width:680px; }
.two-col{ display:grid; grid-template-columns:1.1fr 0.9fr; gap:56px; align-items:start; }
@media (max-width:880px){ .two-col{ grid-template-columns:1fr; gap:32px; } .section{ padding:48px 20px; } }

.info-card{ background:#fff; border:1px solid var(--line); border-radius:14px; padding:28px; }
.info-card h3{ font-size:1.05rem; }
.info-card h3.mt{ margin-top:24px; }
.info-card ul li{ padding:9px 0; border-bottom:1px solid var(--line); color:var(--text); font-size:.95rem; }
.info-card ul li:last-child{ border-bottom:none; }
.info-card ul li::before{ content:"—"; color:var(--teal); margin-right:8px; }

.edu-list{ margin:0; }
.edu-list dt{ font-family:'IBM Plex Mono',monospace; font-size:.78rem; color:var(--teal-dark); margin-top:12px; }
.edu-list dt:first-child{ margin-top:0; }
.edu-list dd{ margin:2px 0 0; font-size:.92rem; }
.chips{ display:flex; flex-wrap:wrap; gap:8px; margin-top:10px; }
.chip{ background:var(--paper-dim); border:1px solid var(--line); border-radius:6px; padding:5px 10px; font-size:.74rem; color:var(--ink); }

/* Advantage grid */
.adv-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:22px; margin-top:36px; }
.advantage{ border-top:2px solid var(--teal); padding-top:16px; }
.advantage h3{ font-size:1rem; font-family:'Inter',sans-serif; font-weight:600; color:var(--ink); }
.advantage p{ font-size:.9rem; color:var(--slate); }
@media (max-width:880px){ .adv-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width:560px){ .adv-grid{ grid-template-columns:1fr; } }

/* Page hero (Services / About / Contact) */
.page-hero{ max-width:820px; margin:0 auto; padding:72px 28px 24px; text-align:left; }
.page-hero h1{ font-size:clamp(2rem,4vw,2.7rem); }
@media (max-width:600px){ .page-hero{ padding:48px 20px 16px; } }

/* Services */
.service-group{ padding:30px 0; border-bottom:1px solid var(--line); }
.service-group:first-child{ padding-top:0; }
.service-group:last-child{ border-bottom:none; }
.service-group-head{ display:flex; align-items:baseline; gap:16px; flex-wrap:wrap; margin-bottom:18px; }
.tag{ font-family:'IBM Plex Mono',monospace; font-size:.68rem; text-transform:uppercase; letter-spacing:.08em; background:var(--ink); color:var(--paper); padding:5px 10px; border-radius:5px; white-space:nowrap; }
.service-group-head h2{ font-size:1.4rem; margin:0; }
.service-list{ display:grid; grid-template-columns:repeat(2,1fr); gap:10px 28px; }
.service-list li{ font-size:.95rem; padding-left:18px; position:relative; }
.service-list li::before{ content:""; position:absolute; left:0; top:.55em; width:7px; height:7px; border-radius:50%; background:var(--teal); }
@media (max-width:700px){ .service-list{ grid-template-columns:1fr; } }

/* Pricing */
.pricing-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:32px; }
.price-card{ background:#fff; border:1px solid var(--line); border-radius:14px; padding:26px; }
.price-card h3{ font-size:1.02rem; font-family:'Inter',sans-serif; font-weight:600; color:var(--ink); }
.price-amount{ font-family:'Source Serif 4',serif; font-size:1.5rem; color:var(--clay-dark); margin:8px 0 12px; }
.price-amount .unit{ font-size:.7rem; color:var(--slate); font-family:'IBM Plex Mono',monospace; }
.price-card p{ font-size:.88rem; color:var(--slate); margin:0; }
.price-foot{ margin-top:28px; font-size:.86rem; color:var(--slate); max-width:760px; }
@media (max-width:880px){ .pricing-grid{ grid-template-columns:1fr; } }

/* Timeline */
.timeline{ margin-top:32px; max-width:760px; }
.t-row{ display:grid; grid-template-columns:110px 24px 1fr; gap:0 18px; }
.t-range{ font-size:.76rem; color:var(--teal-dark); padding-top:3px; }
.t-dot-col{ display:flex; flex-direction:column; align-items:center; }
.t-dot{ width:10px; height:10px; border-radius:50%; background:var(--ink); flex-shrink:0; margin-top:2px; }
.t-bar{ width:1px; flex:1; background:var(--line); margin-top:4px; }
.t-body{ padding-bottom:26px; }
.t-body h4{ font-size:1rem; margin-bottom:2px; }
.t-body p{ font-size:.86rem; color:var(--slate); margin:0; }
@media (max-width:600px){ .t-row{ grid-template-columns:80px 20px 1fr; } .t-range{ font-size:.68rem; } }

/* Portfolio */
.portfolio-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:20px; margin-top:32px; }
.port-card{ background:#fff; border:1px solid var(--line); border-radius:14px; padding:24px; display:flex; flex-direction:column; gap:8px; }
.port-card .tag{ background:var(--paper-dim); color:var(--teal-dark); align-self:flex-start; }
.port-card h3{ font-size:1.05rem; }
.port-card p{ font-size:.88rem; color:var(--slate); margin:0; }
@media (max-width:880px){ .portfolio-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .portfolio-grid{ grid-template-columns:1fr; } }

/* CTA band */
.cta-band{ background:var(--ink); padding:56px 28px; }
.cta-inner{ max-width:1180px; margin:0 auto; display:flex; align-items:center; justify-content:space-between; gap:28px; flex-wrap:wrap; }
.cta-inner h2{ color:#fff; font-size:1.5rem; max-width:480px; margin:0; }
.cta-inner p{ color:rgba(247,245,240,0.75); margin:0; max-width:420px; }

/* Contact */
.contact-hero{ max-width:1000px; }
.contact-grid{ display:grid; grid-template-columns:1.3fr 0.9fr; gap:32px; margin-top:24px; }
.contact-form{ display:flex; flex-direction:column; gap:16px; background:#fff; border:1px solid var(--line); border-radius:14px; padding:28px; }
.contact-form label{ display:flex; flex-direction:column; gap:6px; font-size:.86rem; color:var(--slate); }
.contact-form input, .contact-form textarea{ font-family:'Inter',sans-serif; font-size:.95rem; padding:11px 13px; border:1px solid var(--line); border-radius:8px; background:var(--paper); color:var(--text); resize:vertical; }
.contact-form input:focus, .contact-form textarea:focus{ outline:2px solid var(--teal); outline-offset:1px; }
.form-note{ font-size:.82rem; color:var(--slate); margin:0; }
.contact-side h3{ font-size:1rem; }
.contact-side h3.mt{ margin-top:20px; }
@media (max-width:760px){ .contact-grid{ grid-template-columns:1fr; } }

/* Footer */
.footer{ background:var(--paper-dim); border-top:1px solid var(--line); padding:48px 28px 20px; }
.footer-inner{ max-width:1180px; margin:0 auto; display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:36px; }
.footer-brand{ margin-bottom:14px; }
.footer-note{ font-size:.86rem; color:var(--slate); max-width:320px; margin:0 0 .6em 0; }
.footer-col h4{ font-family:'Inter',sans-serif; font-size:.78rem; text-transform:uppercase; letter-spacing:.06em; color:var(--ink); margin-bottom:12px; font-weight:600; }
.footer-col a{ display:block; padding:6px 0; font-size:.9rem; color:var(--text); text-align:left; }
.footer-col a:hover{ color:var(--teal-dark); }
.footer-bottom{ max-width:1180px; margin:32px auto 0; padding-top:18px; border-top:1px solid var(--line); font-size:.78rem; color:var(--slate); }
@media (max-width:760px){ .footer-inner{ grid-template-columns:1fr; gap:24px; } }

/* Research arc */
.arc-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:32px; }
.arc-card{ background:#fff; border:1px solid var(--line); border-radius:14px; padding:22px; display:flex; flex-direction:column; gap:8px; }
.arc-card .tag{ background:var(--paper-dim); color:var(--teal-dark); align-self:flex-start; }
.arc-card h3{ font-size:1rem; }
.arc-card p{ font-size:.86rem; color:var(--slate); margin:0; }
@media (max-width:880px){ .arc-grid{ grid-template-columns:1fr 1fr; } }
@media (max-width:600px){ .arc-grid{ grid-template-columns:1fr; } }

/* Publication / evaluation lists */
.pub-list{ margin:28px 0 0; padding:0; list-style:none; max-width:880px; }
.pub-list li{ padding:16px 0; border-bottom:1px solid var(--line); }
.pub-list li:first-child{ padding-top:0; }
.pub-list li:last-child{ border-bottom:none; }
.pub-text{ font-size:.92rem; line-height:1.6; color:var(--text); }
.pub-text em{ font-style:italic; color:var(--ink); }

@media (prefers-reduced-motion: reduce){
  .traj-svg path, .traj-svg circle{ animation:none !important; stroke-dashoffset:0 !important; opacity:1 !important; }
}