:root {
  /* brand: from the official DiaPulse logo — green (health) fused with purple (AI/tech) */
  --green: #00cb87;
  --purple: #817ffe;
  --neon: #abff14;
  --chip: #12122a;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 999px;
  --disp: 'Space Grotesk', sans-serif;
  --body: 'Inter', sans-serif;
  --ease: cubic-bezier(.16,1,.3,1);
  --ease-spring: cubic-bezier(.34,1.56,.64,1);

  --gradient-brand: linear-gradient(135deg, var(--green) 0%, var(--purple) 100%);
  --gradient-text: linear-gradient(100deg, var(--green) 0%, var(--purple) 90%);
}
html[data-theme="dark"] {
  --bg: #07070f;
  --bg-2: #0d0d1c;
  --surface: rgba(255,255,255,0.045);
  --surface-hover: rgba(255,255,255,0.075);
  --surface-solid: #12122480;
  --surface-solid-opaque: #14142e;
  --text: #f3f4fb;
  --text-dim: #9aa0bc;
  --text-faint: #676c8a;
  --line: rgba(255,255,255,0.08);
  --line-strong: rgba(255,255,255,0.14);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
  --shadow-md: 0 10px 28px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);
  --shadow-xl: 0 32px 90px rgba(0,0,0,0.6);
  --glow-green: 0 0 1px rgba(0,203,135,.4), 0 0 50px rgba(0,203,135,.16);
  --glow-purple: 0 0 1px rgba(129,127,254,.4), 0 0 50px rgba(129,127,254,.18);
  --glass-blur: blur(20px) saturate(1.4);
  --header-bg: rgba(7,7,15,0.6);
  --header-bg-scrolled: rgba(7,7,15,0.86);
}
html[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-2: #ffffff;
  --surface: rgba(15,15,35,0.03);
  --surface-hover: rgba(15,15,35,0.055);
  --surface-solid: #ffffffcc;
  --surface-solid-opaque: #ffffff;
  --text: #0c0d1f;
  --text-dim: #5a5d78;
  --text-faint: #9396ab;
  --line: rgba(15,15,35,0.08);
  --line-strong: rgba(15,15,35,0.14);
  --shadow-sm: 0 2px 8px rgba(20,20,50,0.05);
  --shadow-md: 0 10px 28px rgba(20,20,50,0.07);
  --shadow-lg: 0 24px 60px rgba(20,20,50,0.09);
  --shadow-xl: 0 32px 90px rgba(20,20,50,0.11);
  --glow-green: 0 0 1px rgba(0,203,135,.3), 0 0 40px rgba(0,203,135,.10);
  --glow-purple: 0 0 1px rgba(129,127,254,.3), 0 0 40px rgba(129,127,254,.12);
  --glass-blur: blur(20px) saturate(1.4);
  --header-bg: rgba(246,247,251,0.6);
  --header-bg-scrolled: rgba(246,247,251,0.88);
}

* { box-sizing: border-box; margin:0; padding:0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background .4s ease, color .4s ease;
  overflow-x: clip;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.wrap { max-width: 1160px; margin:0 auto; padding:0 28px; position:relative; }
::selection { background: var(--green); color: #06140e; }
a:focus-visible, button:focus-visible, input:focus-visible { outline:2px solid var(--green); outline-offset:3px; border-radius:4px; }
h1,h2,h3 { font-family: var(--disp); font-weight:600; letter-spacing:-.02em; }
.icon { display:inline-block; vertical-align:middle; flex-shrink:0; color:currentColor; }
.accent { color: var(--green); }
.accent-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  position: relative;
}

/* --- scroll reveal --- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
  transition-delay: calc(var(--d, 0) * 90ms);
}
[data-reveal].revealed { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  [data-reveal] { opacity:1 !important; transform:none !important; transition:none !important; }
}

/* ================= header & nav ================= */
header {
  position: sticky; top:0; z-index:100;
  background: var(--header-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom:1px solid transparent;
  transition: background .3s var(--ease), border-color .3s var(--ease), box-shadow .3s var(--ease);
}
header.scrolled {
  background: var(--header-bg-scrolled);
  border-bottom-color: var(--line);
  box-shadow: var(--shadow-sm);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 28px; max-width:1160px; margin:0 auto;
  gap: 16px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.icon-chip {
  background: var(--chip); border-radius: 12px; padding:6px;
  display: flex; align-items: center; justify-content: center;
  width: 36px; height: 36px;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.06) inset;
}
.brand:hover .icon-chip { transform: scale(1.06) rotate(-3deg); box-shadow: var(--glow-green); }
.icon-chip img { width:100%; height:100%; object-fit: contain; }
.brand-mark { font-family: var(--disp); font-weight:600; font-size:20px; letter-spacing:-0.02em; }
.brand-mark .accent { color: var(--green); }
.navlinks { display: flex; gap: 8px; font-size:14px; font-weight:500; color: var(--text-dim); }
.navlinks a {
  position: relative;
  padding: 8px 14px; border-radius: var(--radius-full);
  transition: color .2s ease, background .2s ease;
}
.navlinks a:hover { color: var(--text); background: var(--surface); }
.nav-right { display: flex; align-items: center; gap: 10px; }

/* theme toggle */
.theme-toggle {
  width:44px; height:26px; border-radius:100px;
  border:1px solid var(--line);
  background: var(--surface);
  position:relative; cursor:pointer;
  display:flex; align-items:center;
  padding:3px;
  flex-shrink:0;
  transition: background .3s, border-color .3s;
}
.theme-toggle:hover { border-color: var(--line-strong); }
.theme-toggle .knob {
  width:18px; height:18px; border-radius:50%;
  background: var(--gradient-brand);
  transition: transform .35s var(--ease-spring);
  display:flex; align-items:center; justify-content:center;
  position: relative;
  color: #08160f;
  box-shadow: 0 2px 8px rgba(0,203,135,0.35);
}
html[data-theme="light"] .theme-toggle .knob { transform: translateX(18px); }
.theme-toggle .knob .icon { position:absolute; transition: opacity .25s ease, transform .3s var(--ease); }
.icon-sun-ico { opacity:0; transform: rotate(-60deg) scale(.6); }
.icon-moon-ico { opacity:1; transform: rotate(0) scale(1); }
html[data-theme="light"] .icon-sun-ico { opacity:1; transform: rotate(0) scale(1); }
html[data-theme="light"] .icon-moon-ico { opacity:0; transform: rotate(60deg) scale(.6); }

.btn {
  font-family: var(--body); font-weight:600; font-size:13.5px;
  padding: 10px 22px; border-radius:var(--radius-full);
  display: inline-flex; align-items: center; justify-content:center; gap: 8px;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), background .22s ease, border-color .22s ease, color .22s ease;
  border:1px solid transparent; white-space:nowrap;
  cursor: pointer;
  letter-spacing:0.01em;
  position: relative;
}
.btn:active { transform: translateY(1px) scale(.98); }
.btn-primary {
  background: var(--gradient-brand); background-size: 160% 160%; background-position: 0% 50%;
  color: #06160f; box-shadow: var(--shadow-sm), var(--glow-green);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-md), var(--glow-green); background-position: 100% 50%; }
.btn-ghost { border-color: var(--line); color: var(--text); background: var(--surface); }
.btn-ghost:hover { border-color: var(--purple); transform: translateY(-2px); background: var(--surface-hover); box-shadow: var(--shadow-sm); }
.btn-sm { padding: 8px 18px; font-size:12.5px; }
.btn-lg { padding: 15px 30px; font-size:15px; }
.btn-block { width:100%; }
.btn-outline { border-color: var(--green); color: var(--green); background: transparent; }
.btn-outline:hover { background: var(--green); color: #06160f; transform: translateY(-2px); box-shadow: var(--glow-green); }
.btn[disabled] { opacity:.7; cursor:not-allowed; }
.btn:disabled:hover { transform:none; }

/* button loading state */
.btn-spinner {
  display:none; width:15px; height:15px; border-radius:50%;
  border:2px solid rgba(0,0,0,0.25); border-top-color: currentColor;
  animation: spin .7s linear infinite;
}
.btn.is-loading .btn-label { visibility:hidden; }
.btn.is-loading .btn-spinner {
  display:block; position:absolute; top:50%; left:50%; margin:-7.5px 0 0 -7.5px;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* hamburger (mobile nav trigger) */
.hamburger {
  display:none; width:38px; height:38px; align-items:center; justify-content:center;
  border-radius: var(--radius-sm); border:1px solid var(--line); background: var(--surface);
  color: var(--text); cursor:pointer; transition: background .2s ease, border-color .2s ease;
}
.hamburger:hover { background: var(--surface-hover); border-color: var(--line-strong); }

/* mobile nav drawer */
.mobile-nav { position: fixed; inset:0; z-index: 998; visibility:hidden; pointer-events:none; }
.mobile-nav.open { visibility:visible; pointer-events:auto; }
.mobile-nav-backdrop {
  position:absolute; inset:0; background: rgba(0,0,0,0.55); backdrop-filter: blur(4px);
  opacity:0; transition: opacity .3s var(--ease);
}
.mobile-nav.open .mobile-nav-backdrop { opacity:1; }
.mobile-nav-panel {
  position:absolute; top:0; right:0; bottom:0; width:min(320px, 86vw);
  background: var(--surface-solid-opaque); border-left:1px solid var(--line);
  box-shadow: var(--shadow-xl);
  padding: 20px 22px 28px;
  display:flex; flex-direction:column; gap: 28px;
  transform: translateX(100%);
  transition: transform .38s var(--ease);
}
.mobile-nav.open .mobile-nav-panel { transform: translateX(0); }
.mobile-nav-head { display:flex; align-items:center; justify-content:space-between; }
.mobile-navlinks { display:flex; flex-direction:column; gap:4px; }
.mobile-navlinks a {
  font-size:16px; font-weight:600; padding:12px 14px; border-radius:var(--radius-sm);
  transition: background .2s ease, color .2s ease;
}
.mobile-navlinks a:hover { background: var(--surface); color: var(--green); }
body.no-scroll { overflow:hidden; }

@keyframes fadeIn { from { opacity:0; } to { opacity:1; } }

/* ---- floating-label fields (used by the newsletter/registration form) ---- */
.field { position: relative; margin-bottom: 18px; }
.field input {
  width:100%; padding: 18px 16px 8px;
  border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--bg-2); color: var(--text);
  font-family: var(--body); font-size: 15px;
  transition: border .22s ease, box-shadow .22s ease, background .22s ease;
  height: 54px;
}
.field label {
  position:absolute; left:16px; top:50%; transform: translateY(-50%);
  font-size:15px; color: var(--text-faint); pointer-events:none;
  transition: transform .18s var(--ease), font-size .18s var(--ease), color .18s var(--ease), top .18s var(--ease);
  transform-origin: left top;
}
.field input:focus { border-color: var(--green); box-shadow: 0 0 0 4px rgba(0,203,135,0.1); outline: none; background: var(--bg); }
.field input:focus + label,
.field input:not(:placeholder-shown) + label {
  top:13px; font-size:11px; font-weight:600; letter-spacing:.03em; text-transform:uppercase; color: var(--text-dim);
}
.field input:focus + label { color: var(--green); }
.req { color: var(--green); font-weight:700; margin-left:2px; }

/* select field: static (non-floating) label above a styled <select> */
.field-select { display:flex; flex-direction:column; gap:6px; position:relative; }
.field-select label {
  position:static; transform:none; pointer-events:auto;
  font-size:11px; font-weight:600; letter-spacing:.03em; text-transform:uppercase; color: var(--text-dim);
}
.field-select select {
  width:100%; height:54px; padding: 0 34px 0 16px;
  border-radius: var(--radius-sm); border: 1px solid var(--line);
  background: var(--bg-2); color: var(--text);
  font-family: var(--body); font-size: 15px;
  appearance: none; -webkit-appearance: none;
  transition: border .22s ease, box-shadow .22s ease, background .22s ease;
}
.field-select select:invalid { color: var(--text-faint); }
.field-select select:focus { border-color: var(--green); box-shadow: 0 0 0 4px rgba(0,203,135,0.1); outline: none; background: var(--bg); }
.field-select::after {
  content:''; position:absolute; right:16px; bottom:22px;
  width:7px; height:7px; border-right:2px solid var(--text-faint); border-bottom:2px solid var(--text-faint);
  transform: rotate(45deg); pointer-events:none;
}

/* ---- registration form layout ---- */
.newsletter-form { max-width:560px; margin:0 auto; text-align:left; }
.form-grid { display:grid; grid-template-columns: 1fr 1fr; gap:0 16px; margin-bottom:24px; }
.form-divider {
  grid-column: 1 / -1; display:flex; align-items:center; gap:12px;
  margin: 2px 0 10px; color: var(--text-faint); font-size:11px; font-weight:700;
  letter-spacing:.08em; text-transform:uppercase;
}
.form-divider::before, .form-divider::after { content:''; flex:1; height:1px; background: var(--line); }

/* ================= hero ================= */
.hero { padding: 128px 0 84px; text-align: center; position: relative; overflow: hidden; }
.hero-bg { position:absolute; inset:0; z-index:0; overflow:hidden; pointer-events:none; }
.blob {
  position:absolute; border-radius:50%; filter: blur(70px); opacity:.55;
  animation: float 14s ease-in-out infinite;
}
.blob-green { width:420px; height:420px; background: radial-gradient(circle, rgba(0,203,135,.5), transparent 70%); top:-120px; left:8%; }
.blob-purple { width:480px; height:480px; background: radial-gradient(circle, rgba(129,127,254,.45), transparent 70%); top:-40px; right:4%; animation-delay: -7s; }
.hero-grid {
  position:absolute; inset:0;
  background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, black 20%, transparent 75%);
  mask-image: radial-gradient(ellipse 60% 50% at 50% 0%, black 20%, transparent 75%);
  opacity:.5;
}
@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(-16px, 24px) scale(1.06); }
}
@media (prefers-reduced-motion: reduce) { .blob { animation: none; } }

.hero .wrap { position:relative; z-index:1; }
.hero .icon-chip-hero {
  width:76px; height:76px; border-radius:24px; padding:15px; margin:0 auto 30px;
  box-shadow: var(--shadow-lg), var(--glow-green);
}
.hero h1 { font-size: clamp(36px, 5.6vw, 60px); line-height:1.06; max-width:800px; margin:0 auto 20px; }
.hero p { color: var(--text-dim); font-size:18px; max-width:580px; margin:0 auto 36px; line-height:1.7; }
.hero-ctas { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 34px; }
.hero-ctas .btn-primary .icon { transition: transform .25s var(--ease); }
.hero-ctas .btn-primary:hover .icon { transform: translateX(3px); }

.trust-badges { display:flex; gap:10px; justify-content:center; flex-wrap:wrap; }
.trust-badge {
  display:inline-flex; align-items:center; gap:7px;
  font-size:12.5px; font-weight:600; color: var(--text-dim);
  background: var(--surface); border:1px solid var(--line);
  padding:7px 14px 7px 12px; border-radius: var(--radius-full);
}
.trust-badge .icon { color: var(--green); }

/* ================= collab strip ================= */
.collab {
  display: flex; align-items: center; justify-content: center; gap: 14px;
  padding: 22px 0; margin:0 0 100px;
  font-size:13.5px; color: var(--text-dim);
  border-top:1px solid var(--line); border-bottom:1px solid var(--line);
  background: var(--surface);
  border-radius: var(--radius-full);
  backdrop-filter: blur(4px);
  flex-wrap: wrap;
}
.collab b { color: var(--text); font-weight:600; }
.collab .sep { width:5px; height:5px; border-radius:50%; background: var(--purple); opacity:0.6; }
.collab .badge { background: var(--gradient-brand); color: #06160f; padding:3px 13px; border-radius:var(--radius-full); font-weight:700; font-size:11px; letter-spacing:0.03em; }

/* ================= ecosystem ================= */
.section { padding:0 0 110px; }
.section-head { text-align:center; max-width:600px; margin:0 auto 60px; }
.tag {
  display:inline-flex; align-items:center; gap:6px;
  background: var(--surface); border:1px solid var(--line);
  padding:6px 16px 6px 12px; border-radius:var(--radius-full);
  font-size:12px; font-weight:700; color: var(--green); letter-spacing:0.04em;
  margin-bottom:16px; text-transform: uppercase;
}
.tag .icon { color: var(--neon); }
.section-head h2 { font-size: clamp(28px, 3.4vw, 40px); margin-bottom:14px; }
.section-head p { color: var(--text-dim); font-size:16.5px; line-height:1.7; }

.eco-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 22px;
}
.eco-card {
  display: block;
  background: var(--surface); border:1px solid var(--line); border-radius:var(--radius-lg);
  padding: 30px 26px 28px; transition: transform .3s var(--ease), border-color .3s ease, box-shadow .3s var(--ease), background .3s ease;
  position: relative;
  overflow: hidden;
}
.eco-card::before {
  content:''; position:absolute; inset:0; border-radius:inherit; padding:1px;
  background: var(--gradient-brand);
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  opacity:0; transition: opacity .3s ease; pointer-events:none;
}
.eco-card:hover::before { opacity:1; }
.eco-card:hover { transform: translateY(-6px); background: var(--surface-hover); box-shadow: var(--shadow-lg); }
.icon-box {
  width:48px; height:48px; border-radius:14px; display:flex; align-items:center; justify-content:center;
  margin-bottom:18px; transition: transform .3s var(--ease-spring);
}
.eco-card:hover .icon-box { transform: scale(1.08) rotate(-4deg); }
.icon-box-green { background: linear-gradient(145deg, rgba(0,203,135,.22), rgba(0,203,135,.06)); color: var(--green); box-shadow: 0 0 0 1px rgba(0,203,135,.18) inset; }
.icon-box-purple { background: linear-gradient(145deg, rgba(129,127,254,.24), rgba(129,127,254,.06)); color: var(--purple); box-shadow: 0 0 0 1px rgba(129,127,254,.2) inset; }
.icon-box-gradient { background: var(--gradient-brand); color:#06160f; box-shadow: var(--shadow-md); margin: 0 auto 18px; }
.eco-card h3 { font-size:17.5px; margin-bottom:8px; }
.eco-card p { font-size:13.5px; color: var(--text-dim); line-height:1.65; }
.eco-card .arrow {
  color: var(--green); margin-top:14px; display:inline-flex; opacity:0;
  transition: opacity .3s ease, transform .3s var(--ease); transform: translateX(-6px);
}
.eco-card:hover .arrow { opacity:1; transform: translateX(0); }

/* ================= newsletter / HCP registration ================= */
.newsletter-section { padding: 0 0 110px; }
.newsletter-card {
  background: var(--surface-solid);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 60px 44px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.newsletter-card::before {
  content:''; position:absolute; inset:0;
  background:
    radial-gradient(ellipse 60% 50% at 20% -10%, rgba(0,203,135,.14) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 90% 110%, rgba(129,127,254,.14) 0%, transparent 60%);
  pointer-events:none;
}
.newsletter-card > * { position: relative; z-index:1; }
.newsletter-card h2 { font-size: clamp(24px, 3vw, 34px); margin-bottom:12px; }
.newsletter-card p { color: var(--text-dim); font-size:15.5px; max-width:480px; margin:0 auto 32px; line-height:1.7; }
.newsletter-note { font-size:12px; color: var(--text-faint); margin-top:16px; text-align:center; }
.newsletter-success { display:none; align-items:center; justify-content:center; gap:8px; color: var(--green); font-weight:600; font-size:14px; margin-top:16px; }
.newsletter-success.show { display:flex; animation: fadeIn .3s ease; }
.newsletter-error { display:none; align-items:center; justify-content:center; gap:8px; color:#ff8080; font-weight:600; font-size:14px; margin-top:16px; }
.newsletter-error.show { display:flex; animation: fadeIn .3s ease; }

/* ================= footer ================= */
footer { border-top:1px solid var(--line); padding:44px 0; margin-top: 20px; background: var(--surface); }
.footer-row {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap:16px;
  font-size:13px; color: var(--text-dim);
}
.footer-top {
  display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:20px;
  padding-bottom:28px; margin-bottom:24px; border-bottom:1px solid var(--line);
}
.footer-brand { display: flex; align-items: center; gap:10px; }
.footer-brand .icon-chip { width:28px; height:28px; border-radius:10px; padding:5px; }
.footer-brand span { font-family:var(--disp); font-weight:600; font-size:15px; color:var(--text); }
.footer-brand span .accent { color:var(--green); }
.footer-links { display:flex; gap:24px; }
.footer-links a { transition: color .2s; }
.footer-links a:hover { color: var(--text); }
.social-links { display:flex; align-items:center; gap:10px; }
.social-links a {
  width:36px; height:36px; border-radius:50%;
  border:1px solid var(--line); background: var(--surface-solid-opaque);
  display:flex; align-items:center; justify-content:center;
  color: var(--text-dim); transition: all .25s var(--ease);
}
.social-links a:hover { color:#06160f; background: var(--gradient-brand); border-color: transparent; transform: translateY(-3px); box-shadow: var(--glow-green); }
.social-links svg { width:16px; height:16px; }

/* ================= responsive ================= */
@media(max-width:900px) {
  .eco-grid { grid-template-columns:1fr 1fr; }
  .hero { padding:110px 0 70px; }
}
@media(max-width:760px) {
  .navlinks { display: none; }
  .hamburger { display:flex; }
  .footer-row { flex-direction:column; text-align:center; }
  .footer-top { flex-direction:column; text-align:center; }
  .footer-links { justify-content:center; }
  .collab { border-radius:var(--radius-lg); padding:16px 20px; }
  .newsletter-card { padding: 44px 26px; }
  .form-grid { grid-template-columns:1fr; }
}
@media(max-width:520px) {
  .eco-grid { grid-template-columns:1fr; }
  .hero { padding:96px 0 56px; }
}
@media(prefers-reduced-motion:reduce) { * { transition-duration: .01ms !important; animation-duration: .01ms !important; } }