@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,700;1,400&family=Lato:wght@300;400;700&display=swap');

:root {
  --sky-deep:    #1a6fa3;
  --balloon-orng:#fb8c00;
  --balloon-red: #e53935;
  --text-dark:   #1a2340;
  --text-mid:    #3d5278;
  --card-bg:     rgba(255,255,255,0.82);
  --shadow:      0 12px 40px rgba(26,111,163,0.13);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Lato',sans-serif;
  font-weight:300;
  background:linear-gradient(170deg,#cce7f8 0%,#e8f5fa 35%,#fdf6e3 70%,#fce8b2 100%);
  min-height:100vh;
  color:var(--text-dark);
  overflow-x:hidden;
}

/* SKY BG */
.sky-bg{position:fixed;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.sun{
  position:absolute;top:-80px;right:12%;
  width:280px;height:280px;
  background:radial-gradient(circle,#ffe97a 0%,#ffb30055 50%,transparent 70%);
  border-radius:50%;
  animation:pulse-sun 6s ease-in-out infinite alternate;
}
@keyframes pulse-sun{from{transform:scale(1);opacity:.85}to{transform:scale(1.08);opacity:1}}

.cloud{position:absolute;background:white;border-radius:50px;opacity:.72;filter:blur(1px);animation:drift linear infinite}
.cloud::before,.cloud::after{content:'';position:absolute;background:white;border-radius:50%}
.c1{width:160px;height:48px;top:8%;left:-180px;animation-duration:55s}
.c1::before{width:80px;height:72px;top:-38px;left:22px}
.c1::after{width:60px;height:56px;top:-28px;left:72px}
.c2{width:220px;height:56px;top:22%;left:-250px;animation-duration:72s;animation-delay:-20s}
.c2::before{width:100px;height:90px;top:-48px;left:30px}
.c2::after{width:78px;height:64px;top:-34px;left:96px}
.c3{width:120px;height:36px;top:55%;left:-140px;animation-duration:48s;animation-delay:-38s;opacity:.5}
.c3::before{width:60px;height:54px;top:-30px;left:16px}
.c3::after{width:46px;height:40px;top:-22px;left:54px}
@keyframes drift{from{transform:translateX(0)}to{transform:translateX(calc(100vw + 300px))}}

/* LAYOUT */
.wrap{position:relative;z-index:1;max-width:1040px;margin:0 auto;padding:0 20px 80px}

/* HERO */
.hero{display:flex;flex-direction:column;align-items:center;padding:80px 20px 40px;text-align:center}
.hero-label{
  font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--sky-deep);font-weight:700;margin-bottom:14px;
  opacity:0;animation:fade-up .7s .2s ease forwards;
}
.hero h1{
  font-family:'Playfair Display',serif;
  font-size:clamp(2.6rem,6vw,4.8rem);font-weight:700;
  color:var(--text-dark);line-height:1.12;
  opacity:0;animation:fade-up .8s .4s ease forwards;
}
.hero h1 em{font-style:italic;color:var(--balloon-orng)}
.hero-sub{
  max-width:620px;font-size:1.08rem;color:var(--text-mid);
  margin-top:18px;line-height:1.75;
  opacity:0;animation:fade-up .8s .65s ease forwards;
}
.balloon-hero{
  margin-top:40px;
  opacity:0;
  animation:float 5s ease-in-out infinite, fade-up .9s .8s ease forwards;
  animation-fill-mode:both;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
@keyframes fade-up{from{opacity:0;transform:translateY(22px)}to{opacity:1;transform:translateY(0)}}

/* STATS BAR */
.stats-bar{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));
  gap:1px;background:rgba(26,111,163,.15);
  border-radius:18px;overflow:hidden;
  margin:50px 0 56px;box-shadow:var(--shadow);
}
.stat{background:var(--card-bg);backdrop-filter:blur(10px);padding:22px 18px;text-align:center}
.stat-val{font-family:'Playfair Display',serif;font-size:2.1rem;font-weight:700;color:var(--balloon-orng);line-height:1}
.stat-lbl{font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--text-mid);margin-top:6px}

/* SECTIONS */
.section{margin-bottom:52px;opacity:0;transform:translateY(28px);transition:opacity .6s ease,transform .6s ease}
.section.visible{opacity:1;transform:none}
.section-header{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.section-icon{
  width:46px;height:46px;
  background:linear-gradient(135deg,var(--balloon-orng),var(--balloon-red));
  border-radius:14px;display:flex;align-items:center;justify-content:center;
  font-size:1.4rem;flex-shrink:0;box-shadow:0 4px 14px rgba(251,140,0,.35);
}
.section-header h2{font-family:'Playfair Display',serif;font-size:1.65rem;color:var(--text-dark);font-weight:700}

/* CARD */
.card{
  background:var(--card-bg);backdrop-filter:blur(12px);
  border-radius:20px;padding:30px 34px;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.7);
}
.card p{font-size:1.02rem;line-height:1.82;color:var(--text-mid)}
.card p+p{margin-top:14px}

/* TWO-COL */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}

/* PARTS GRID */
.parts-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px}
.part-card{
  background:var(--card-bg);backdrop-filter:blur(10px);
  border-radius:16px;padding:22px 18px;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.7);
  text-align:center;transition:transform .25s ease,box-shadow .25s ease;
}
.part-card:hover{transform:translateY(-5px);box-shadow:0 20px 50px rgba(26,111,163,.18)}
.part-emoji{font-size:2.2rem;margin-bottom:10px}
.part-name{font-family:'Playfair Display',serif;font-weight:700;font-size:1rem;color:var(--text-dark);margin-bottom:6px}
.part-desc{font-size:.87rem;color:var(--text-mid);line-height:1.55}

/* TIMELINE */
.timeline{position:relative;padding-left:32px}
.timeline::before{
  content:'';position:absolute;left:10px;top:6px;bottom:6px;width:3px;
  background:linear-gradient(to bottom,var(--balloon-orng),var(--sky-deep));border-radius:3px;
}
.tl-item{
  position:relative;margin-bottom:26px;
  background:var(--card-bg);backdrop-filter:blur(10px);
  border-radius:14px;padding:18px 22px;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.7);
}
.tl-item::before{
  content:'';position:absolute;left:-26px;top:22px;
  width:14px;height:14px;border-radius:50%;
  background:var(--balloon-orng);border:3px solid white;box-shadow:0 0 0 2px var(--balloon-orng);
}
.tl-year{font-family:'Playfair Display',serif;font-size:1.1rem;font-weight:700;color:var(--balloon-orng);margin-bottom:4px}
.tl-text{font-size:.95rem;color:var(--text-mid);line-height:1.6}

/* USAGE GRID */
.usage-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:16px}
.usage-card{
  background:linear-gradient(135deg,var(--card-bg),rgba(255,255,255,.55));
  backdrop-filter:blur(10px);border-radius:16px;padding:22px 16px;text-align:center;
  box-shadow:var(--shadow);border:1px solid rgba(255,255,255,.7);transition:transform .25s;
}
.usage-card:hover{transform:scale(1.04)}
.usage-icon{font-size:2rem;margin-bottom:10px}
.usage-title{font-weight:700;font-size:.92rem;color:var(--text-dark);margin-bottom:5px}
.usage-desc{font-size:.82rem;color:var(--text-mid);line-height:1.5}

/* PRO-CON */
.pro-con{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.pro-box,.con-box{border-radius:16px;padding:22px 24px;border:1px solid rgba(255,255,255,.7)}
.pro-box{background:linear-gradient(135deg,rgba(46,213,115,.12),rgba(46,213,115,.05));box-shadow:0 4px 20px rgba(46,213,115,.1)}
.con-box{background:linear-gradient(135deg,rgba(229,57,53,.1),rgba(229,57,53,.04));box-shadow:0 4px 20px rgba(229,57,53,.1)}
.box-title{font-family:'Playfair Display',serif;font-weight:700;font-size:1.1rem;margin-bottom:14px}
.pro-box .box-title{color:#1b7a3f}
.con-box .box-title{color:#b71c1c}
.box-list{list-style:none}
.box-list li{padding:7px 0;font-size:.93rem;color:var(--text-mid);display:flex;gap:8px;line-height:1.5}
.box-list li::before{flex-shrink:0}
.pro-box .box-list li::before{content:'✓';color:#2ed573;font-weight:700}
.con-box .box-list li::before{content:'✗';color:#e53935;font-weight:700}

/* FOOTER */
.page-footer{text-align:center;padding:30px;font-size:.82rem;color:rgba(61,82,120,.6);letter-spacing:.06em}

@media(max-width:680px){
  .two-col,.pro-con{grid-template-columns:1fr}
  .card{padding:22px 18px}
}