/* ============================================================
   UpgradeAirKit.com — Lulu Design System
   Brand: "Stop breathing everyone else's air."
   Mascot: Lulu the Fresh Air Lemur
   Built around the LifeBreath MAX XTR ERV
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&family=Inter:wght@400;500;600;700&family=Caveat:wght@500;700&display=swap');

:root {
  /* Core palette (sampled from the Lulu mockups) */
  --navy:        #0C2A4D;   /* dark band / headlines */
  --navy-2:      #0E3157;
  --navy-deep:   #081C36;
  --green:       #2FA84F;   /* "Air" accent, CTAs */
  --green-dark:  #218A3E;
  --green-light: #E8F6EC;
  --rose:        #C8242B;   /* Lulu's heart / script accent */
  --rose-soft:   #E04A50;
  --ink:         #15202B;   /* body text */
  --ink-soft:    #4A5A6A;
  --paper:       #FFFFFF;
  --mist:        #F4F7FB;   /* page background */
  --mist-2:      #EAF0F7;
  --line:        #DCE5EF;
  --gold:        #E0B84C;   /* Lulu's pendant */

  /* Typography */
  --font-display: 'Montserrat', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-script:  'Caveat', cursive;

  /* Geometry */
  --radius:    14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(12,42,77,.07);
  --shadow:    0 10px 30px rgba(12,42,77,.12);
  --shadow-lg: 0 24px 60px rgba(12,42,77,.20);
  --maxw: 1180px;
  --gutter: clamp(18px, 4vw, 48px);

  /* Brand gradients & glow (every surface should shine) */
  --grad-navy:  linear-gradient(135deg, #0E3157 0%, #0C2A4D 55%, #081C36 100%);
  --grad-green: linear-gradient(135deg, #36BE5B 0%, #2FA84F 60%, #218A3E 100%);
  --grad-air:   linear-gradient(120deg, #E8F6EC 0%, #F4F7FB 100%);
  --glow-green: 0 8px 24px rgba(47,168,79,.35);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--mist);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--green-dark); text-decoration: none; }

/* ---- Layout ---- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(48px, 7vw, 96px); }
.section--tight { padding-block: clamp(32px, 4vw, 56px); }

/* ---- Type scale ---- */
.eyebrow {
  font-family: var(--font-display); font-weight: 800;
  letter-spacing: .14em; text-transform: uppercase;
  font-size: .8rem; color: var(--green-dark);
}
h1, h2, h3 { font-family: var(--font-display); color: var(--navy); line-height: 1.06; margin: 0 0 .4em; }
h1 { font-weight: 900; font-size: clamp(2.2rem, 5.4vw, 4rem); letter-spacing: -.01em; }
h2 { font-weight: 800; font-size: clamp(1.7rem, 3.4vw, 2.7rem); }
h3 { font-weight: 700; font-size: clamp(1.15rem, 1.8vw, 1.4rem); }
.lede { font-size: clamp(1.02rem, 1.4vw, 1.2rem); color: var(--ink-soft); max-width: 56ch; }
.text-green { color: var(--green-dark); }
.script { font-family: var(--font-script); color: var(--rose); font-weight: 700; }

/* ---- Buttons ---- */
.btn {
  --bg: var(--grad-green); --fg: #fff;
  display: inline-flex; align-items: center; gap: .55em;
  font-family: var(--font-display); font-weight: 700; font-size: .98rem;
  padding: .85em 1.6em; border-radius: var(--radius-pill);
  background: var(--bg); color: var(--fg); border: 0; cursor: pointer;
  box-shadow: var(--glow-green); transition: transform .15s ease, box-shadow .2s ease, filter .2s ease;
  text-align: center; white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(47,168,79,.45); filter: brightness(1.04); }
.btn:active { transform: translateY(0); }
.btn:focus-visible { outline: 3px solid rgba(47,168,79,.55); outline-offset: 3px; }
.btn--navy { --bg: var(--grad-navy); box-shadow: 0 8px 24px rgba(12,42,77,.3); }
.btn--ghost { --bg: transparent; --fg: var(--navy); border: 2px solid var(--line); box-shadow: none; }
.btn--ghost:hover { border-color: var(--green); color: var(--green-dark); }
.btn--lg { padding: 1.05em 2em; font-size: 1.08rem; }
.btn--block { display: flex; width: 100%; justify-content: center; }

/* ---- Cards / pills ---- */
.card {
  background: var(--paper); border: 1px solid var(--line);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #CBD9E9; }
.pill {
  display: inline-flex; align-items: center; gap: .5em;
  padding: .5em 1em; border-radius: var(--radius-pill);
  background: var(--green-light); color: var(--green-dark);
  font-weight: 600; font-size: .9rem;
}

/* ---- Dark feature band (the navy strip in the mockups) ---- */
.band-navy { background: var(--grad-navy); color: #EaF1Fb; position: relative; overflow: hidden; }
.band-navy h1, .band-navy h2, .band-navy h3 { color: #fff; }
.band-navy::after { /* soft airflow glow */
  content:""; position:absolute; inset:auto -10% -40% 40%; height: 80%;
  background: radial-gradient(closest-side, rgba(47,168,79,.25), transparent 70%);
  filter: blur(20px); pointer-events: none;
}
.feature-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: clamp(16px, 3vw, 40px); }
.feature { display: flex; gap: .9em; align-items: flex-start; }
.feature .ico {
  flex: 0 0 46px; height: 46px; border-radius: 50%;
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.18);
  display: grid; place-items: center; color: #6BE08C;
}
.feature h4 { margin: 0 0 .2em; font-family: var(--font-display); font-weight: 700; color: #fff; font-size: 1rem; }
.feature p { margin: 0; color: #AEC2DA; font-size: .9rem; }

/* ---- "Lulu says" speech bubble ---- */
.lulu-quote {
  position: relative; background: var(--paper); border: 1px solid var(--line);
  border-radius: 18px; padding: 1em 1.2em; box-shadow: var(--shadow-sm);
  font-family: var(--font-script); font-size: 1.5rem; color: var(--ink);
}
.lulu-quote::after {
  content:""; position:absolute; left: 28px; bottom: -14px; width: 0; height: 0;
  border: 14px solid transparent; border-top-color: var(--paper); border-bottom: 0;
  filter: drop-shadow(0 2px 1px rgba(12,42,77,.06));
}
.lulu-quote .heart { color: var(--rose); }

/* ---- Header ---- */
.site-header {
  position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.92);
  backdrop-filter: saturate(140%) blur(10px); border-bottom: 1px solid var(--line);
}
.site-header .container { display: flex; align-items: center; gap: 1.5rem; min-height: 68px; }
.brand { font-family: var(--font-display); font-weight: 800; font-size: 1.35rem; color: var(--navy); letter-spacing: -.02em; }
.brand b { color: var(--green-dark); font-weight: 800; }
.brand small { display:block; font-size: .58rem; letter-spacing: .22em; color: var(--ink-soft); font-weight:700; margin-top:-2px; }
.nav { display: flex; gap: 1.4rem; margin-left: auto; }
.nav a { color: var(--navy); font-weight: 600; font-size: .95rem; }
.nav a:hover { color: var(--green-dark); }

/* ---- Footer slogan band ---- */
.slogan-band { background: var(--mist-2); border-top: 1px solid var(--line); }
.slogan-band .container { display:flex; flex-wrap:wrap; gap: clamp(12px,3vw,40px); justify-content:center; padding-block: 22px; }
.slogan-band b { font-family: var(--font-display); font-weight: 800; color: var(--navy); font-size: clamp(.95rem,1.4vw,1.15rem); display:inline-flex; align-items:center; gap:.5em; }

.site-footer { background: var(--navy-deep); color: #9FB4CC; padding-block: 48px 28px; }
.site-footer a { color: #CFE0F2; }

/* ---- Utilities ---- */
.grid { display: grid; gap: clamp(16px, 2.5vw, 28px); }
.cols-2 { grid-template-columns: repeat(2,1fr); }
.cols-3 { grid-template-columns: repeat(3,1fr); }
.cols-5 { grid-template-columns: repeat(5,1fr); }
.center { text-align: center; }
.muted { color: var(--ink-soft); }
.stack > * + * { margin-top: 1rem; }
.badge-green { background: var(--grad-green); color:#fff; padding:.25em .7em; border-radius: var(--radius-pill); font-size:.72rem; font-weight:700; font-family:var(--font-display); }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---- Responsive ---- */
@media (max-width: 880px) {
  .feature-row { grid-template-columns: repeat(2,1fr); }
  .cols-3, .cols-5 { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 560px) {
  .cols-2, .feature-row { grid-template-columns: 1fr; }
}