/* ==========================================================================
   Pocket POCUS — site styles
   Distinct ultrasound identity: deep slate + teal/cyan "beam" accents
   ========================================================================== */

:root {
  --ink:       #0b1220;   /* near-black slate for dark sections           */
  --ink-2:     #0f1b2d;   /* slightly lifted dark                          */
  --navy:      #0f2a3f;   /* deep teal-navy                                */
  --teal:      #0891b2;   /* primary accent (cyan-600)                     */
  --teal-500:  #06b6d4;
  --teal-400:  #22d3ee;   /* bright highlight                              */
  --teal-300:  #67e8f9;
  --aqua-glow: rgba(34, 211, 238, 0.35);

  --text:      #16212e;   /* body text on light                            */
  --muted:     #5b6b7c;   /* secondary text                                */
  --muted-2:   #8595a4;
  --line:      #e3e9ef;   /* hairline borders                              */
  --bg:        #f6f9fb;   /* page background                               */
  --card:      #ffffff;
  --card-soft: #f0f6f9;

  --radius:    16px;
  --radius-sm: 11px;
  --shadow:    0 1px 2px rgba(16,33,46,.05), 0 12px 30px rgba(16,33,46,.07);
  --shadow-lg: 0 30px 70px rgba(8,40,60,.28);
  --maxw:      1120px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial,
          "Helvetica Neue", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: var(--teal); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Logo mark ---------------------------------------------------- */
.logo-mark { width: 1.25em; height: 1.25em; flex: 0 0 auto; object-fit: contain; border-radius: 22%; }

/* ---------- Top navigation ---------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(246, 249, 251, 0.82);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: 11px;
  font-weight: 700; font-size: 1.16rem; letter-spacing: -.02em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.brand .logo-mark { font-size: 1.55rem; color: var(--teal); }
.brand b { color: var(--teal); font-weight: 700; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  color: var(--muted); font-weight: 550; font-size: .95rem;
  padding: 8px 13px; border-radius: 9px; transition: .15s;
}
.nav-links a:hover { color: var(--ink); background: rgba(8,145,178,.08); text-decoration: none; }
.nav-links a.active { color: var(--teal); }

/* ---------- Buttons ------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  font-weight: 600; font-size: 1rem; line-height: 1;
  padding: 14px 22px; border-radius: 12px; border: 1px solid transparent;
  cursor: pointer; transition: transform .12s ease, box-shadow .2s ease, background .2s;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(180deg, var(--teal-500), var(--teal));
  color: #fff; box-shadow: 0 8px 22px rgba(8,145,178,.35);
}
.btn-primary:hover { box-shadow: 0 12px 28px rgba(8,145,178,.45); }
.btn-ghost {
  background: rgba(255,255,255,.07); color: #eaf6fb;
  border-color: rgba(255,255,255,.22);
}
.btn-ghost:hover { background: rgba(255,255,255,.14); }
.btn-soft { background: var(--card-soft); color: var(--navy); border-color: var(--line); }
.btn-soft:hover { background: #e6f1f5; }

/* "Coming soon" App Store button (non-functional placeholder) */
.btn-store {
  position: relative; cursor: default;
  background: #0c1a25; color: #eaf6fb; border: 1px solid rgba(255,255,255,.16);
  padding: 12px 22px; flex-direction: column; align-items: flex-start; gap: 2px;
}
.btn-store:hover { transform: none; }
.btn-store .store-kicker {
  font-size: .68rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--teal-300); font-weight: 700;
}
.btn-store .store-line { display: inline-flex; align-items: center; gap: 9px; font-size: 1.12rem; font-weight: 650; }
.btn-store .store-line svg { width: 19px; height: 19px; }

/* ---------- Hero --------------------------------------------------------- */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(120% 90% at 78% -10%, rgba(34,211,238,.20), transparent 55%),
    radial-gradient(90% 70% at 8% 4%, rgba(8,145,178,.22), transparent 50%),
    linear-gradient(180deg, var(--ink) 0%, var(--ink-2) 70%, var(--navy) 100%);
  color: #eaf2f7;
}
/* faint sonography "beam" lines */
.hero::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image:
    repeating-linear-gradient(115deg, rgba(255,255,255,.025) 0 2px, transparent 2px 46px);
  mask-image: radial-gradient(70% 80% at 80% 0%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 80% at 80% 0%, #000 30%, transparent 75%);
}
.hero .wrap {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center;
  padding-top: 80px; padding-bottom: 84px;
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .8rem; font-weight: 650; letter-spacing: .12em; text-transform: uppercase;
  color: var(--teal-300);
  background: rgba(34,211,238,.10); border: 1px solid rgba(34,211,238,.25);
  padding: 6px 13px; border-radius: 999px;
}
.hero h1 {
  font-size: clamp(2.25rem, 4.4vw, 3.5rem); line-height: 1.05; letter-spacing: -.03em;
  margin: 20px 0 0; color: #fff; font-weight: 750;
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--teal-300), var(--teal-500));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede { font-size: 1.16rem; color: #b9cad6; margin: 22px 0 0; max-width: 33em; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 32px; align-items: center; }
.hero-note { font-size: .85rem; color: #8ba3b3; margin-top: 16px; }

/* Phone mockup */
.phone {
  position: relative; width: 290px; margin: 0 auto;
  border-radius: 44px; padding: 11px;
  background: linear-gradient(160deg, #2a3a47, #0c151d);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,.10);
}
.phone::before {
  content: ""; position: absolute; top: 20px; left: 50%; transform: translateX(-50%);
  width: 92px; height: 26px; background: #05080b; border-radius: 999px; z-index: 3;
}
.phone img { border-radius: 34px; width: 100%; display: block; }
.phone-wrap { position: relative; }
.phone-glow {
  position: absolute; inset: -10% -6% -16% -6%; z-index: -1; filter: blur(46px);
  background: radial-gradient(50% 50% at 50% 38%, var(--aqua-glow), transparent 70%);
}

/* ---------- Sections ----------------------------------------------------- */
section { padding: 78px 0; }
.section-head { max-width: 720px; margin: 0 auto 48px; text-align: center; }
.section-head.left { margin-left: 0; text-align: left; }
.kicker {
  font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--teal);
}
h2 { font-size: clamp(1.7rem, 3vw, 2.35rem); line-height: 1.12; letter-spacing: -.025em;
     margin: 10px 0 0; color: var(--ink); font-weight: 720; }
.section-head p { color: var(--muted); font-size: 1.08rem; margin: 14px 0 0; }

/* Protocols / scan coverage */
.protocols { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.proto-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.proto-card {
  border: 1px solid var(--line); border-radius: var(--radius); padding: 24px 24px 22px;
  background: linear-gradient(180deg, #fff, var(--card-soft));
  transition: transform .15s, box-shadow .2s, border-color .2s;
}
.proto-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: #cfe6ee; }
.proto-card .ph { display: flex; align-items: center; gap: 12px; }
.proto-icon {
  width: 42px; height: 42px; flex: 0 0 auto; border-radius: 11px;
  display: grid; place-items: center; color: #fff;
  background: linear-gradient(150deg, var(--teal-500), var(--teal));
}
.proto-icon svg { width: 23px; height: 23px; }
.proto-card h3 { margin: 0; font-size: 1.18rem; color: var(--ink); letter-spacing: -.01em; }
.proto-card .sub { color: var(--muted-2); font-size: .82rem; font-weight: 600; }
.chips { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.chip {
  font-size: .82rem; color: var(--navy); background: var(--card-soft);
  border: 1px solid var(--line); padding: 5px 11px; border-radius: 999px; font-weight: 550;
}

/* Feature grid */
.features { background: var(--bg); }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.feat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px 24px; box-shadow: var(--shadow);
}
.feat .ic {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(8,145,178,.10); color: var(--teal); margin-bottom: 16px;
}
.feat .ic svg { width: 25px; height: 25px; }
.feat h3 { margin: 0 0 7px; font-size: 1.14rem; color: var(--ink); letter-spacing: -.01em; }
.feat p { margin: 0; color: var(--muted); font-size: .97rem; }

/* Screenshot gallery */
.gallery { background: var(--ink); color: #eaf2f7; position: relative; overflow: hidden; }
.gallery::after {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5;
  background-image: repeating-linear-gradient(115deg, rgba(255,255,255,.022) 0 2px, transparent 2px 46px);
}
.gallery .section-head h2 { color: #fff; }
.gallery .section-head p { color: #aebecb; }
.gallery .kicker { color: var(--teal-300); }
.shots { position: relative; z-index: 1;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; align-items: start; }
.shot { text-align: center; }
.shot .frame {
  border-radius: 30px; padding: 8px; background: linear-gradient(160deg, #243440, #0c151d);
  border: 1px solid rgba(255,255,255,.10); box-shadow: var(--shadow-lg);
}
.shot .frame img { border-radius: 23px; }
.shot p { color: #aebecb; font-size: .9rem; margin: 16px 4px 0; }
.shot p b { color: #eaf2f7; font-weight: 650; display: block; margin-bottom: 2px; }

/* Built by physicians / CTA band */
.band { background: #fff; border-top: 1px solid var(--line); }
.authors { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 8px; }
.author {
  display: inline-flex; align-items: center; gap: 9px; font-weight: 600; color: var(--navy);
  background: var(--card-soft); border: 1px solid var(--line);
  padding: 9px 16px; border-radius: 999px;
}
.author .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--teal); }

.cta {
  position: relative; overflow: hidden; text-align: center;
  background:
    radial-gradient(90% 120% at 50% -20%, rgba(34,211,238,.20), transparent 60%),
    linear-gradient(180deg, var(--navy), var(--ink));
  color: #fff; border-radius: 0;
}
.cta h2 { color: #fff; }
.cta p { color: #b9cad6; max-width: 40em; margin: 14px auto 0; }
.cta .hero-cta { justify-content: center; }

/* Disclaimer strip */
.disclaimer { background: var(--card-soft); border-top: 1px solid var(--line); }
.disclaimer .wrap { padding-top: 30px; padding-bottom: 30px; }
.disclaimer .box {
  display: flex; gap: 15px; align-items: flex-start;
  font-size: .92rem; color: var(--muted); max-width: 880px; margin: 0 auto;
}
.disclaimer .box svg { width: 22px; height: 22px; flex: 0 0 auto; color: var(--teal); margin-top: 2px; }
.disclaimer .box b { color: var(--navy); }

/* ---------- Legal / content pages --------------------------------------- */
.page-hero {
  background:
    radial-gradient(90% 120% at 85% -30%, rgba(34,211,238,.16), transparent 55%),
    linear-gradient(180deg, var(--ink), var(--navy));
  color: #fff; padding: 64px 0 56px;
}
.page-hero .kicker { color: var(--teal-300); }
.page-hero h1 { font-size: clamp(2rem, 4vw, 2.8rem); margin: 10px 0 0; letter-spacing: -.025em; font-weight: 740; }
.page-hero p { color: #b9cad6; margin: 14px 0 0; max-width: 44em; }
.updated { font-size: .85rem; color: #8ba3b3; margin-top: 18px; }

.legal { padding: 56px 0 30px; }
.legal .wrap { max-width: 820px; }
.legal h2 {
  font-size: 1.3rem; margin: 38px 0 0; color: var(--ink); letter-spacing: -.01em;
  padding-top: 8px;
}
.legal h2:first-of-type { margin-top: 0; }
.legal h3 { font-size: 1.05rem; margin: 26px 0 6px; color: var(--navy); }
.legal p, .legal li { color: #34424f; font-size: 1.01rem; }
.legal p { margin: 12px 0 0; }
.legal ul { margin: 12px 0 0; padding-left: 22px; }
.legal li { margin: 7px 0; }
.legal strong { color: var(--ink); }
.legal .lead {
  font-size: 1.1rem; color: var(--muted); background: var(--card);
  border: 1px solid var(--line); border-left: 4px solid var(--teal);
  border-radius: var(--radius-sm); padding: 18px 20px; margin-top: 4px;
}
.legal .legalese {
  font-size: .9rem; color: #51606e; background: var(--card-soft);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 16px 18px; letter-spacing: .005em;
}

/* Support specifics */
.support-card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 30px; text-align: center; margin-top: 4px;
}
.support-card .email-btn { margin-top: 8px; }
.faq { margin-top: 30px; }
.faq details {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 4px 20px; margin-top: 12px;
}
.faq details[open] { box-shadow: var(--shadow); }
.faq summary {
  cursor: pointer; font-weight: 640; color: var(--ink); padding: 14px 0; list-style: none;
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--teal); font-size: 1.4rem; font-weight: 400; line-height: 1; }
.faq details[open] summary::after { content: "\2212"; }
.faq details p { margin: 0 0 16px; color: #34424f; }

/* ---------- Footer ------------------------------------------------------- */
.footer { background: var(--ink); color: #9fb2c0; padding: 46px 0 38px; }
.footer .top {
  display: flex; flex-wrap: wrap; gap: 20px; align-items: center; justify-content: space-between;
  padding-bottom: 26px; border-bottom: 1px solid rgba(255,255,255,.10);
}
.footer .brand { color: #fff; }
.footer .brand .logo-mark { color: var(--teal-400); }
.footer nav { display: flex; flex-wrap: wrap; gap: 6px 4px; }
.footer nav a { color: #9fb2c0; padding: 6px 12px; border-radius: 8px; font-size: .94rem; }
.footer nav a:hover { color: #fff; background: rgba(255,255,255,.07); text-decoration: none; }
.footer .legal-note {
  font-size: .85rem; color: #74899a; margin-top: 22px; max-width: 760px;
}
.footer .copy {
  margin-top: 18px; font-size: .85rem; color: #74899a;
  display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: center;
}
.footer .copy a { color: #9fb2c0; }

/* ---------- Responsive --------------------------------------------------- */
@media (max-width: 920px) {
  .hero .wrap { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 60px; gap: 44px; }
  .hero-text { text-align: center; }
  .hero .lede { margin-left: auto; margin-right: auto; }
  .eyebrow { margin: 0 auto; }
  .hero-cta { justify-content: center; }
  .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .shots { grid-template-columns: repeat(2, 1fr); gap: 28px 22px; }
}
@media (max-width: 620px) {
  section { padding: 56px 0; }
  .nav-links a { padding: 8px 9px; font-size: .9rem; }
  .brand { font-size: 1.05rem; }
  .proto-grid { grid-template-columns: 1fr; }
  .feat-grid { grid-template-columns: 1fr; }
  .shots { grid-template-columns: 1fr; max-width: 320px; margin: 0 auto; }
  .footer .top { flex-direction: column; align-items: flex-start; }
}