/* ==========================================================================
   Flona — Landing Page Design System
   Built on the Flona brand tokens. Style foundation: "Accessible & Ethical"
   (WCAG-minded, visible focus, reduced-motion aware) wearing the brand
   gradient skin. Fonts: Space Grotesk (display) + DM Sans (body).
   ========================================================================== */

/* ---- Tokens -------------------------------------------------------------- */
:root {
  /* Brand */
  --deep-blue:     #0A2A8A;
  --electric-blue: #0E7BFF;
  --cyan:          #39D5FF;
  --violet:        #6A35FF;
  --magenta:       #E14CFF;
  --pink:          #FF6BCF;

  /* Neutrals */
  --white:    #FFFFFF;
  --surface:  #F8FAFF;
  --border:   #E6ECFF;
  --text-2:   #667085;
  --ink:      #0A2A8A;   /* primary text = deep blue */
  --ink-soft: #2A3354;   /* slightly softer heading ink for long copy */

  /* Gradients */
  --grad: linear-gradient(135deg,#39D5FF 0%,#0E7BFF 25%,#6A35FF 60%,#E14CFF 85%,#FF6BCF 100%);
  --grad-text: linear-gradient(90deg,#0A2A8A 0%,#1538B3 30%,#6A35FF 70%,#E14CFF 100%);
  --grad-soft: linear-gradient(135deg,#F4F8FF 0%,#FBF5FF 100%);

  /* Glows */
  --glow-blue:   rgba(57,213,255,0.35);
  --glow-purple: rgba(106,53,255,0.30);
  --glow-pink:   rgba(225,76,255,0.25);

  /* Geometry & rhythm */
  --r-sm: 10px; --r: 16px; --r-lg: 24px; --r-xl: 32px; --r-pill: 999px;
  --maxw: 1140px;
  --shadow-card: 0 18px 50px rgba(10,42,138,0.08);
  --shadow-soft: 0 8px 24px rgba(10,42,138,0.06);

  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "DM Sans", system-ui, -apple-system, sans-serif;
}

/* ---- Reset / base ------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink-soft);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4 { font-family: var(--font-display); color: var(--ink); line-height: 1.12; margin: 0 0 .4em; letter-spacing: -0.02em; }
h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); font-weight: 700; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); font-weight: 600; }
h3 { font-size: 1.3rem; font-weight: 600; }
p  { margin: 0 0 1rem; }
a  { color: var(--electric-blue); text-decoration: none; }
img, svg { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

/* Accessibility: visible focus, skip link, reduced motion */
:focus-visible { outline: 3px solid var(--electric-blue); outline-offset: 3px; border-radius: 4px; }
.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  background: var(--deep-blue); color: #fff; padding: 10px 16px; border-radius: var(--r-sm);
}
.skip-link:focus { left: 12px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}

/* ---- Layout helpers ----------------------------------------------------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }
.section { padding-block: clamp(64px, 9vw, 120px); }
.section--surface { background: var(--surface); }
.eyebrow {
  display: inline-block; font-family: var(--font-display); font-weight: 600;
  font-size: .82rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--violet); margin-bottom: 14px;
}
.section-head { max-width: 660px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }
.lead { font-size: 1.18rem; color: var(--text-2); }
.gradient-text {
  background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---- Buttons ------------------------------------------------------------ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  padding: 14px 26px; border-radius: var(--r-pill); border: 1px solid transparent;
  cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  min-height: 48px;
}
.btn--primary { background: var(--electric-blue); color: #fff; box-shadow: 0 10px 28px var(--glow-blue); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px var(--glow-blue); }
.btn--gradient { background: var(--grad); color: #fff; box-shadow: 0 12px 32px var(--glow-purple); }
.btn--gradient:hover { transform: translateY(-2px); box-shadow: 0 16px 44px var(--glow-purple); }
.btn--ghost { background: rgba(255,255,255,.7); color: var(--deep-blue); border-color: var(--border); }
.btn--ghost:hover { background: #fff; transform: translateY(-2px); box-shadow: var(--shadow-soft); }
.btn--lg { padding: 17px 34px; font-size: 1.06rem; min-height: 56px; }

/* ---- Header ------------------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  background: rgba(255,255,255,.72); border-bottom: 1px solid transparent;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.site-header.scrolled { border-color: var(--border); box-shadow: var(--shadow-soft); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand .sphere { width: 38px; height: 38px; border-radius: 50%;
  background: url("assets/ball.png") center/cover no-repeat;
  box-shadow: 0 6px 18px var(--glow-purple); flex: none; }
.brand .name { font-family: var(--font-display); font-weight: 700; font-size: 1.45rem; letter-spacing: -.01em; }
.brand-logo { height: 40px; width: auto; display: block; }
@media (max-width: 680px) { .brand-logo { height: 34px; } }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { color: var(--ink-soft); font-weight: 500; transition: color .2s ease; }
.nav-links a:hover { color: var(--electric-blue); }
.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }

/* ---- Hero --------------------------------------------------------------- */
.hero { position: relative; overflow: hidden; padding-block: clamp(56px, 8vw, 110px); }
.hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 80%;
  background:
    radial-gradient(600px 420px at 15% 10%, var(--glow-blue), transparent 60%),
    radial-gradient(560px 420px at 85% 0%, var(--glow-pink), transparent 60%),
    radial-gradient(640px 480px at 60% 60%, var(--glow-purple), transparent 65%);
  filter: blur(20px); z-index: -1; opacity: .9;
}
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.hero .badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; margin-bottom: 22px;
  background: rgba(255,255,255,.7); border: 1px solid var(--border); border-radius: var(--r-pill);
  font-size: .85rem; font-weight: 500; color: var(--deep-blue); box-shadow: var(--shadow-soft);
}
.hero .badge .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px var(--glow-blue); }
.hero h1 { margin-bottom: .35em; }
.hero p.lead { max-width: 520px; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; }
.hero-form { display: flex; gap: 10px; flex-wrap: wrap; max-width: 480px; margin-bottom: 14px; }
.hero-form input { flex: 1 1 220px; }
.hero-trust { display: flex; align-items: center; gap: 14px; color: var(--text-2); font-size: .92rem; }
.avatars { display: flex; }
.avatars span {
  width: 30px; height: 30px; border-radius: 50%; margin-left: -8px; border: 2px solid #fff;
  background: url("assets/ball.png") center/cover no-repeat; box-shadow: var(--shadow-soft);
}
.avatars span:first-child { margin-left: 0; }

/* Hero device mockup */
.hero-visual { position: relative; }
.device {
  position: relative; margin-inline: auto; width: 290px; padding: 14px;
  background: linear-gradient(160deg,#11163a,#222a63); border-radius: 44px;
  box-shadow: 0 40px 90px rgba(10,42,138,.30), 0 0 0 2px rgba(255,255,255,.06) inset;
}
.device .screen { background: var(--white); border-radius: 32px; overflow: hidden; padding: 18px 16px 22px; }
.device .notch { width: 110px; height: 22px; background: #11163a; border-radius: 0 0 14px 14px; margin: -18px auto 12px; }
.float-card {
  position: absolute; background: rgba(255,255,255,.78); backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px); border: 1px solid var(--border); border-radius: var(--r);
  padding: 12px 16px; box-shadow: 0 16px 40px var(--glow-blue); font-size: .9rem;
}
.float-card .k { font-family: var(--font-display); font-weight: 700; color: var(--deep-blue); font-size: 1.1rem; }
.float-card--tl { top: 26px; left: -26px; }
.float-card--br { bottom: 40px; right: -22px; box-shadow: 0 16px 40px var(--glow-pink); }

/* App screen bits (reused in mockups) */
.app-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.app-greet { font-family: var(--font-display); font-weight: 600; color: var(--ink); }
.app-pill { font-size: .72rem; color: var(--violet); background: #F1ECFF; padding: 4px 10px; border-radius: var(--r-pill); font-weight: 600; }
.glucose-card { background: var(--grad-soft); border: 1px solid var(--border); border-radius: var(--r); padding: 14px; margin-bottom: 14px; }
.glucose-card .num { font-family: var(--font-display); font-size: 2rem; font-weight: 700; color: var(--electric-blue); }
.glucose-card .unit { font-size: .8rem; color: var(--text-2); }
.spark { height: 46px; margin-top: 8px; }
.mini-list li { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px solid var(--border); font-size: .85rem; color: var(--ink-soft); }
.mini-list li:last-child { border: 0; }
.mini-ico { width: 28px; height: 28px; border-radius: 9px; display: grid; place-items: center; flex: none; color: #fff; }

/* ---- Logo strip --------------------------------------------------------- */
.proof-strip { padding-block: 28px; border-block: 1px solid var(--border); }
.proof-strip p { text-align: center; color: var(--text-2); font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; margin: 0 0 18px; }
.proof-logos { display: flex; flex-wrap: wrap; justify-content: center; gap: 38px; align-items: center; opacity: .6; }
.proof-logos span { font-family: var(--font-display); font-weight: 600; color: var(--text-2); font-size: 1.1rem; }

/* ---- Cards / grids ------------------------------------------------------ */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2,1fr); }
.grid-3 { grid-template-columns: repeat(3,1fr); }

.card {
  background: var(--white); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 28px; box-shadow: var(--shadow-card); transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 26px 60px rgba(10,42,138,.12); }
.card .ico {
  width: 52px; height: 52px; border-radius: 15px; display: grid; place-items: center;
  background: var(--grad-soft); border: 1px solid var(--border); margin-bottom: 18px; color: var(--violet);
}
.card h3 { margin-bottom: .4em; }
.card p { color: var(--text-2); margin: 0; font-size: .98rem; }

/* Problem cards have a softer, emotional tone */
.problem-card { background: var(--grad-soft); border-color: transparent; }
.problem-card .ico { background: #fff; }

/* ---- Comparison (Why Flona) -------------------------------------------- */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.compare-col { border-radius: var(--r-lg); padding: 30px; }
.compare-col.trad { background: var(--surface); border: 1px solid var(--border); }
.compare-col.flona { background: var(--grad); color: #fff; box-shadow: 0 24px 60px var(--glow-purple); }
.compare-col h3 { color: inherit; }
.compare-col.trad h3 { color: var(--text-2); }
.compare-row { display: flex; align-items: flex-start; gap: 12px; padding: 14px 0; border-top: 1px solid rgba(255,255,255,.18); }
.compare-col.trad .compare-row { border-color: var(--border); }
.compare-row:first-of-type { border-top: 0; }
.compare-row .label { font-family: var(--font-display); font-weight: 600; }
.compare-row small { display: block; opacity: .82; font-weight: 400; font-family: var(--font-body); }
.compare-col.trad .compare-row .label { color: var(--ink); }
.compare-check { flex: none; width: 22px; height: 22px; }

/* ---- Product preview tabs ---------------------------------------------- */
.preview { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.preview-tabs { display: flex; flex-direction: column; gap: 12px; }
.preview-tab {
  text-align: left; background: var(--white); border: 1px solid var(--border); border-radius: var(--r);
  padding: 18px 20px; cursor: pointer; transition: all .2s ease; font-family: inherit;
  display: flex; gap: 14px; align-items: flex-start;
}
.preview-tab:hover { border-color: var(--cyan); }
.preview-tab[aria-selected="true"] { border-color: var(--electric-blue); box-shadow: 0 10px 30px var(--glow-blue); background: var(--grad-soft); }
.preview-tab .t-ico { width: 40px; height: 40px; border-radius: 12px; background: var(--grad); display: grid; place-items: center; color: #fff; flex: none; }
.preview-tab h4 { margin: 0 0 2px; font-size: 1.05rem; }
.preview-tab p { margin: 0; font-size: .9rem; color: var(--text-2); }
.preview-stage { position: relative; min-height: 440px; display: grid; place-items: center; }
.preview-panel { display: none; }
.preview-panel.active { display: block; animation: fade .35s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

/* AI chat bubbles */
.chat { background: var(--white); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 20px; box-shadow: var(--shadow-card); width: 320px; }
.bubble { padding: 11px 15px; border-radius: 16px; margin-bottom: 12px; font-size: .92rem; max-width: 85%; line-height: 1.5; }
.bubble.user { background: var(--surface); color: var(--ink-soft); margin-left: auto; border-bottom-right-radius: 4px; }
.bubble.ai { background: var(--grad); color: #fff; border-bottom-left-radius: 4px; box-shadow: 0 10px 26px var(--glow-purple); }

/* ---- Parents section ---------------------------------------------------- */
.parents { display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center; }
.parents-list li { display: flex; gap: 14px; margin-bottom: 18px; }
.parents-list .ico { width: 44px; height: 44px; border-radius: 13px; background: var(--grad-soft); border: 1px solid var(--border); display: grid; place-items: center; color: var(--violet); flex: none; }
.parents-list h4 { margin: 0 0 2px; }
.parents-list p { margin: 0; color: var(--text-2); font-size: .96rem; }
.parents-visual { background: var(--grad); border-radius: var(--r-xl); padding: 40px; color: #fff; box-shadow: 0 30px 70px var(--glow-purple); }
.parents-visual blockquote { font-family: var(--font-display); font-size: 1.35rem; line-height: 1.4; margin: 0 0 18px; }

/* ---- Roadmap ------------------------------------------------------------ */
.roadmap { display: grid; grid-template-columns: repeat(5,1fr); gap: 0; position: relative; }
.roadmap::before { content: ""; position: absolute; top: 23px; left: 8%; right: 8%; height: 2px; background: var(--border); }
.road-step { text-align: center; padding: 0 10px; position: relative; }
.road-dot { width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 16px; display: grid; place-items: center;
  background: #fff; border: 2px solid var(--border); color: var(--violet); position: relative; z-index: 1; }
.road-step.now .road-dot { background: var(--grad); color: #fff; border-color: transparent; box-shadow: 0 10px 26px var(--glow-purple); }
.road-step h4 { font-size: 1.02rem; margin-bottom: 4px; }
.road-step p { font-size: .86rem; color: var(--text-2); margin: 0; }
.road-step .when { font-size: .72rem; font-weight: 600; color: var(--violet); text-transform: uppercase; letter-spacing: .08em; }

/* ---- Testimonials ------------------------------------------------------- */
.tstrip { display: grid; grid-template-columns: repeat(3,1fr); gap: 22px; }
.tcard { background: var(--white); border: 1px solid var(--border); border-radius: var(--r-lg); padding: 26px; box-shadow: var(--shadow-soft); }
.tcard .stars { display: flex; gap: 3px; color: var(--magenta); margin-bottom: 14px; }
.tcard .quote { color: var(--ink-soft); font-size: 1.02rem; margin-bottom: 20px; }
.tcard .who { display: flex; align-items: center; gap: 12px; }
.tcard .who .av { width: 42px; height: 42px; border-radius: 50%; background: url("assets/ball.png") center/cover no-repeat; flex: none; }
.tcard .who .placeholder { width: 60%; }
.bar { height: 9px; border-radius: var(--r-pill); background: var(--border); }
.bar.short { width: 45%; margin-top: 6px; }
.muted-name { font-family: var(--font-display); font-weight: 600; color: var(--ink); font-size: .96rem; }
.muted-role { color: var(--text-2); font-size: .84rem; }

/* ---- Early access / CTA ------------------------------------------------- */
.cta-band { position: relative; overflow: hidden; }
.cta-inner {
  background: var(--grad); border-radius: var(--r-xl); padding: clamp(40px,6vw,72px);
  text-align: center; color: #fff; box-shadow: 0 36px 90px var(--glow-purple); position: relative; overflow: hidden;
}
.cta-inner h2 { color: #fff; }
.cta-inner p { color: rgba(255,255,255,.92); max-width: 540px; margin-inline: auto; }
.cta-form { display: flex; gap: 10px; flex-wrap: wrap; max-width: 520px; margin: 26px auto 18px; }
.cta-form input { flex: 1 1 240px; }
.cta-form .btn--ghost { background: #fff; color: var(--deep-blue); }
.waitlist-count { display: inline-flex; align-items: center; gap: 10px; font-size: .94rem; color: rgba(255,255,255,.9); }
.waitlist-count strong { font-family: var(--font-display); font-size: 1.05rem; color: #fff; }

/* ---- Inputs ------------------------------------------------------------- */
.field { width: 100%; }
input[type=email] {
  width: 100%; font-family: inherit; font-size: 1rem; padding: 14px 18px; min-height: 48px;
  border-radius: var(--r-pill); border: 1px solid var(--border); background: #fff; color: var(--ink);
}
input[type=email]::placeholder { color: #9AA4BF; }
.form-note { font-size: .82rem; color: var(--text-2); }
.cta-form + .form-note, .cta-inner .form-note { color: rgba(255,255,255,.85); }
.form-msg { font-size: .9rem; margin-top: 10px; min-height: 1.2em; font-weight: 500; }
.form-msg.ok { color: var(--cyan); }
.hero-form ~ .form-msg.ok, body .form-msg.ok.dark { color: #0a8a3a; }

/* ---- Sticky waitlist bar ----------------------------------------------- */
.sticky-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 90;
  background: rgba(255,255,255,.85); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border); box-shadow: 0 -8px 30px rgba(10,42,138,.08);
  transform: translateY(120%); transition: transform .35s ease; padding: 12px 0;
}
.sticky-bar.show { transform: translateY(0); }
.sticky-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.sticky-inner .sb-text { font-family: var(--font-display); font-weight: 600; color: var(--ink); }
.sticky-inner .sb-text small { display: block; font-family: var(--font-body); font-weight: 400; color: var(--text-2); font-size: .82rem; }
.sticky-form { display: flex; gap: 8px; flex: 1 1 380px; max-width: 460px; }

/* ---- Footer ------------------------------------------------------------- */
.site-footer { background: #0A1130; color: #C3CBE8; padding-block: 64px 30px; }
.site-footer .brand .name { color: #fff; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 44px; }
.footer-grid p { color: #8B95C0; font-size: .96rem; max-width: 280px; }
.footer-col h4 { color: #fff; font-size: .95rem; margin-bottom: 16px; }
.footer-col a { color: #B7C0E6; display: block; padding: 6px 0; font-size: .94rem; }
.footer-col a:hover { color: var(--cyan); }
.socials { display: flex; gap: 12px; margin-top: 18px; }
.socials a { width: 40px; height: 40px; border-radius: 12px; background: rgba(255,255,255,.06); display: grid; place-items: center; color: #C3CBE8; }
.socials a:hover { background: var(--grad); color: #fff; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 14px; font-size: .86rem; color: #8B95C0; }

/* ---- Reveal-on-scroll --------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- Responsive --------------------------------------------------------- */
@media (max-width: 960px) {
  .hero-grid, .preview, .parents { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .grid-3, .tstrip { grid-template-columns: repeat(2,1fr); }
  .roadmap { grid-template-columns: 1fr 1fr; gap: 32px; }
  .roadmap::before { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  body { font-size: 16px; }
  .nav-links { display: none; }
  .nav-toggle { display: inline-flex; }
  .nav-links.open {
    display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border); padding: 18px 24px; gap: 16px; box-shadow: var(--shadow-card);
  }
  .grid-2, .grid-3, .compare, .tstrip { grid-template-columns: 1fr; }
  .roadmap { grid-template-columns: 1fr; }
  .float-card--tl { left: -8px; top: 10px; }
  .float-card--br { right: -6px; }
  .sticky-form { flex-basis: 100%; }
  .sticky-inner .sb-text { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
}