:root{
  --bg:#fff7f9;
  --accent:#ff7aa2;
  --accent-2:#ffb86b;
  --text:#333;
  --card-bg: #fff;
  --max-width:1100px;
  --radius:14px;
  --shadow: 0 10px 30px rgba(20,20,30,0.08);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  color:var(--text);
background: #00FEDD;
background: radial-gradient(circle, rgba(0, 254, 221, 1) 0%, rgba(75, 239, 242, 1) 50%, rgba(104, 83, 237, 1) 100%);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  padding:24px;
  display:flex;
  justify-content:center;
  align-items:flex-start;
}

.page{
  width:100%;
  max-width:var(--max-width);
}

/* Header */
.hero{
  background:linear-gradient(180deg, rgba(255,122,162,0.12), transparent);
  border-radius:var(--radius);
  padding:28px;
  box-shadow:var(--shadow);
  background:var(--card-bg);
  position:relative;
  overflow:visible;
}

.hero-inner{
  display:flex;
  gap:20px;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
}

.title{
  margin:0;
  font-size:clamp(24px, 4vw, 36px);
  letter-spacing: -0.02em;
}

.subtitle{
  margin:4px 0 0 0;
  color:#6b5a67;
}

.controls{display:flex;gap:8px;align-items:center}
.controls input[type="number"]{
  width:90px;padding:6px;border-radius:8px;border:1px solid #e8d8df;background:#fff;
}
.btn{
  padding:8px 12px;border-radius:8px;border:0;background:rgba(0,0,0,0.06);cursor:pointer;
}
.btn.primary{background:linear-gradient(90deg,var(--accent),var(--accent-2));color:white}
.btn:focus{outline:2px solid rgba(0,0,0,0.12)}

/* Balloons */
.balloons{position:absolute;inset:0;pointer-events:none}
.balloon{
  position:absolute;font-size:26px;opacity:0.95;
  animation:float 6s ease-in-out infinite;
}
.b1{top:8px;left:6%;animation-delay:-0.2s}
.b2{top:8px;left:18%;animation-delay:0.4s}
.b3{top:6px;right:14%;animation-delay:0.7s}
.b4{top:8px;right:6%;animation-delay:0.1s}
.b5{top:22px;left:50%;animation-delay:0.9s}
@keyframes float{
  0%{transform:translateY(0) translateX(0)}
  50%{transform:translateY(-12px) translateX(6px)}
  100%{transform:translateY(0) translateX(0)}
}

/* Layout */
.card-wrap{
  margin-top:18px;
  display:grid;
  grid-template-columns: 1fr 320px;
  gap:18px;
  align-items:start;
}

.card{
  background:var(--card-bg);
  border-radius:12px;
  padding:18px;
  box-shadow:var(--shadow);
  min-height:280px;
  display:flex;
  flex-direction:column;
  gap:12px;
}

/* Card content */
.card-header{
  display:flex;gap:16px;align-items:center;
}
.cake{display:flex;flex-direction:column;align-items:center;justify-content:center}
.cake-body{font-size:38px;filter:drop-shadow(0 6px 14px rgba(0,0,0,0.06))}
.candle{width:14px;height:40px;background:linear-gradient(#ffd6c7,#f5a6a6);border-radius:6px;position:relative;display:flex;align-items:flex-start;justify-content:center;margin-bottom:-10px}
.flame{width:8px;height:12px;background:linear-gradient(orange,yellow);border-radius:50% 50% 20% 20%;margin-top:4px;box-shadow:0 4px 8px rgba(255,165,64,0.45);animation:flicker 0.25s infinite}
@keyframes flicker{
  0%{transform:translateY(0) scaleX(1)}
  50%{transform:translateY(-1px) scaleX(0.9)}
  100%{transform:translateY(0) scaleX(1)}
}

.greeting h2{margin:0}
.age{color:#a64b71;margin-top:4px;font-weight:600}

/* message */
.card-body{padding:8px;border-radius:10px;background:linear-gradient(180deg, rgba(255,245,249,0.9), rgba(255,247,251,0.95))}
.message{margin:0;font-size:16px;line-height:1.5}

/* side controls */
.side-controls{
  background:linear-gradient(180deg,#fff,#fffaf0);
  padding:14px;border-radius:12px;box-shadow:var(--shadow);
  display:flex;flex-direction:column;gap:8px;height:100%;
}
.side-controls input[type="text"], .side-controls input[type="file"], .side-controls textarea {
  padding:8px;border-radius:8px;border:1px solid #f0e6ea;
  background:white;
}

/* gallery */
.gallery{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}
.gallery img{width:72px;height:72px;border-radius:8px;object-fit:cover;box-shadow:0 6px 14px rgba(20,20,30,0.06)}

/* confetti canvas and footer */
.confetti-canvas{
  position:fixed;left:0;top:0;width:100vw;height:100vh;pointer-events:none;z-index:999;
}
.footer{text-align:center;margin-top:18px;color:#6b5a67}

/* share result */
.share-result{word-break:break-all;background:#fff;padding:8px;border-radius:8px;border:1px dashed #f0e6ea;margin-top:6px}

/* Responsive */
@media (max-width:900px){
  .card-wrap{grid-template-columns:1fr; }
  .side-controls{order:2}
  .hero-inner{flex-direction:column;align-items:flex-start}
}