/* ============== Fonts ============== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Rubik:wght@500;700&display=swap');

/* ============== Design tokens ============== */
:root{
  --bg: #ffffff;
  --text: #1f1f1f;
  --muted: #6b7280;
  --line: rgba(0,0,0,.08);
  --card: #ffffff;

  --brand: #f48220;
  --brand-600: #d96c13;
  --charcoal: #2f2f2f;

  --radius: 14px;
  --radius-sm: 10px;

  --shadow-1: 0 1px 2px rgba(0,0,0,.04);
  --shadow-2: 0 10px 30px rgba(0,0,0,.10);

  --nav-h: 84px;
  --container: 1120px;
}

/* ============== Base ============== */
*{ box-sizing: border-box; margin:0; padding:0; }
html,body{ height:100%; }
body{
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a{ color: inherit; text-decoration: none; }
img{ display:block; max-width:100%; height:auto; }
.container{ max-width: var(--container); margin: 0 auto; padding: 0 20px; }

/* Focus */
a:focus-visible, .btn:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible{
  outline: 3px solid #111;
  outline-offset: 3px;
  border-radius: 10px;
}

/* ============== Buttons ============== */
.btn{
  display:inline-flex; align-items:center; gap:.5rem;
  padding: 12px 18px; border-radius: var(--radius-sm);
  font-weight: 600; letter-spacing:.2px;
  transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease, color .15s ease, border-color .15s ease;
  border: 1px solid transparent;
  cursor: pointer;
}
.btn-primary{ background: var(--brand); color:#fff; box-shadow: var(--shadow-1); }
.btn-primary:hover{ background: var(--brand-600); transform: translateY(-1px); box-shadow: var(--shadow-2); }
.btn-quiet{ background:#fff; color: var(--text); border-color: var(--line); }
.btn-quiet:hover{ background:#f8f8f8; transform: translateY(-1px); }

/* ============== Header / Nav ============== */
.navbar{
  position: sticky; top:0; z-index:1000; height: var(--nav-h);
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.72);
  backdrop-filter: saturate(140%) blur(14px);
}
.nav-inner{ height:100%; display:flex; align-items:center; justify-content:space-between; gap:20px; }
.brand .logo{ height:56px; width:auto; }

.nav-links ul{ display:flex; gap:26px; }
.nav-links a{ position:relative; padding:8px 2px; font-weight:500; color:#2a2a2a; }
.nav-links a.active,
.nav-links a:hover{ color: var(--brand); }

.nav-ctas{ display:flex; align-items:center; gap:10px; }

/* Mobile toggle */
.nav-toggle{
  display:none;
  width:40px; height:40px; border-radius:10px;
  border:1px solid var(--line);
  background:#fff; cursor:pointer;
  align-items:center; justify-content:center; gap:4px;
}
.nav-toggle .bar{
  display:block; width:18px; height:2px; background:#111; border-radius:2px;
}

/* Mobile menu */
.mobile-menu{
  position:fixed; inset: var(--nav-h) 0 0 0;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(10px) saturate(140%);
  transform: translateY(-8px);
  opacity:0; visibility:hidden;
  transition: opacity .2s ease, transform .2s ease, visibility .2s;
  border-top:1px solid var(--line);
  z-index: 900;
}
.mobile-menu.open{ opacity:1; visibility:visible; transform:none; }
.mobile-menu ul{
  display:flex; flex-direction:column; gap:12px;
  padding:16px 20px;
}
.mobile-menu a{
  padding:12px 10px; border-radius:10px; font-weight:600;
  color:#222; border:1px solid transparent;
}
.mobile-menu a:hover{ background:#f6f6f6; }
.mobile-menu .donate-mobile{
  background: var(--brand); color:#fff; border-color: transparent; text-align:center;
}
body.no-scroll{ overflow:hidden; }

/* ============== Hero ============== */
.hero{
  position:relative; min-height: calc(100svh - var(--nav-h));
  display:grid; place-items:center; text-align:center; color:#fff;
  background:
    radial-gradient(1000px 600px at 70% 15%, rgba(0,0,0,.35), transparent 60%),
    linear-gradient(180deg, rgba(0,0,0,.35), rgba(0,0,0,.25)),
    url('hero-stethoscope.jpg') center 40% / cover no-repeat;
}
.hero-overlay{ position:absolute; inset:0; }
.hero-content{ position:relative; z-index:1; }
.hero h1{
  font-family: 'Rubik', system-ui, sans-serif;
  font-size: clamp(34px, 6vw, 64px);
  line-height:1.08; letter-spacing:.2px; margin-bottom: 18px;
  text-shadow: 0 8px 32px rgba(0,0,0,.35);
}
.hero p{
  font-size: clamp(16px, 1.8vw, 20px);
  color: #f4f4f4; opacity:.95; margin-bottom: 26px;
}
.hero-actions{ display:flex; gap:12px; justify-content:center; flex-wrap:wrap; }

/* Subpage hero */
.hero--sub{
  min-height: min(48svh, 520px);
  background-position: center 42%;
}

/* ============== Feature links (cards) ============== */
.features{
  display:grid; grid-template-columns: repeat(12, 1fr);
  gap: 14px; margin: clamp(36px, 8vh, 120px) auto;
}
.feature{
  grid-column: span 4;
  display:grid; grid-template-columns: auto 1fr auto; align-items:center; gap: 14px;
  padding: 18px 18px; border-radius: var(--radius);
  background: var(--card); border:1px solid var(--line); box-shadow: var(--shadow-1);
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.feature:hover{ transform: translateY(-3px); box-shadow: var(--shadow-2); border-color: rgba(0,0,0,.12); }
.feature .icon{
  width:40px; height:40px; border-radius: 10px;
  display:grid; place-items:center; color: var(--brand); background: #fff5ec; border: 1px solid rgba(244,130,32,.25);
}
.feature .icon svg{ width:20px; height:20px; }
.feature .copy h2{ font-size: 18px; line-height:1.3; margin-bottom: 2px; }
.feature .copy p{ color: var(--muted); font-size: 14px; }
.feature .chev{ font-size: 22px; color:#9ca3af; transition: transform .15s ease, color .15s ease; }
.feature:hover .chev{ transform: translateX(2px); color: var(--brand); }

/* ============== Footer ============== */
.site-footer{ border-top:1px solid var(--line); margin-top: clamp(36px, 8vh, 120px); }
.footer-grid{
  display:grid; gap: 26px; padding: 40px 0;
  grid-template-columns: 1.2fr 1fr 1.2fr;
}
.logo-footer{ height:58px; width:auto; margin-bottom: 10px; }
.footer-links ul{ display:grid; gap:10px; }
.footer-links a:hover{ color: var(--brand); }
.footer-contact p{ margin-bottom: 6px; }
.footer-ctas{ display:flex; gap:10px; margin-top: 10px; }
.footer-bottom{ padding: 16px 0 34px; color: #6b7280; border-top:1px solid var(--line); text-align:center; }

/* ============== Page and layout helpers ============== */
.page{ margin: clamp(28px, 6vh, 80px) auto; }
.grid-2{ display:grid; gap:18px; grid-template-columns: 1fr 1fr; }
.grid-3{ display:grid; gap:14px; grid-template-columns: repeat(3, 1fr); }
.callout{
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  background:#fff;
  box-shadow: var(--shadow-1);
  margin-top: 20px;
}
.stack-sm{ display:flex; gap:10px; flex-wrap:wrap; }

/* Prose */
.prose h2, .prose h3{ margin-bottom: 8px; }
.prose p{ margin-bottom: 10px; color:#303030; }
.prose ul{ padding-left: 18px; margin: 8px 0 2px; }
.prose li{ list-style: disc; margin-left: 14px; margin-bottom: 6px; }

/* FAQs */
.faq-list{ margin: 10px 0 6px; }
.faq{ border-bottom: 1px solid var(--line); padding: 12px 0; }
.faq summary{ list-style: none; cursor: pointer; }
.faq summary::-webkit-details-marker{ display:none; }
.faq h2{ font-size: 18px; }
.faq-body{ padding: 6px 0 2px 0; color: var(--muted); }

/* Forms */
.form{ display:grid; gap:12px; }
.field{ display:grid; gap:6px; }
.field-inline{ align-items: center; }
label{ font-weight: 600; }
.req{ color:#b91c1c; margin-left:4px; }

input[type="text"], input[type="email"], input[type="tel"], select, textarea{
  width:100%; padding:12px 12px; border-radius: var(--radius-sm);
  border:1px solid var(--line); background:#fff; color:var(--text);
  transition: border-color .15s ease, box-shadow .15s ease;
}
textarea{ resize: vertical; }
input:focus, select:focus, textarea:focus{
  outline: none; border-color: rgba(244,130,32,.6);
  box-shadow: 0 0 0 4px rgba(244,130,32,.12);
}
input[aria-invalid="true"], select[aria-invalid="true"], textarea[aria-invalid="true"]{
  border-color:#ef4444; box-shadow: 0 0 0 4px rgba(239,68,68,.12);
}
.error{ color:#b91c1c; font-size:13px; min-height:1em; }
.checkbox{ display:flex; gap:10px; align-items:flex-start; font-weight: 500; }
.actions{ display:flex; gap:10px; margin-top:4px; }

.notice{
  margin-top: 10px; border:1px solid var(--line); border-radius: var(--radius);
  background:#fff; box-shadow: var(--shadow-1); padding: 12px;
}

/* ============== Reveal animations ============== */
.reveal{
  opacity:0; transform: translateY(14px);
  transition: opacity 420ms ease, transform 420ms ease;
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, transform;
}
.reveal[data-animate="fade"]{ transform:none; }
.reveal[data-animate="up"]{ transform: translateY(18px); }
.reveal.is-visible{ opacity:1; transform:none; }
.stagger > .reveal{} /* delays applied by JS */

@media (prefers-reduced-motion: reduce){
  *{ transition:none !important; animation:none !important; }
  .reveal{ opacity:1 !important; transform:none !important; }
}

/* ============== Responsive ============== */
@media (max-width: 1024px){
  .nav-links ul{ gap:18px; }
  .features .feature{ grid-column: span 6; }
}
@media (max-width: 900px){
  .grid-2, .grid-3{ grid-template-columns: 1fr; }
}
@media (max-width: 720px){
  :root{ --nav-h: 72px; }
  .brand .logo{ height:48px; }
  .nav-links{ display:none; }
  .nav-toggle{ display:inline-flex; }
  .features .feature{ grid-column: 1 / -1; }
  .footer-grid{ grid-template-columns: 1fr; }
}