:root {
  color-scheme: dark;
  --bg: #3a0d2a;
  --bg-2: #5a1640;
  --bg-3: #7a2654;
  --ink: #fff8f0;
  --ink-soft: #ffd9c2;
  --ink-faint: #c98a9a;
  --rose: #ff7aa2;
  --rose-hi: #ffc1d4;
  --rose-deep: #b13a66;
  --peach: #ffb088;
  --peach-hi: #ffd9c2;
  --peach-deep: #d96b3e;
  --gold: #ffd166;
  --gold-hi: #fff0b8;
  --gold-deep: #c69218;
  --magenta: #e84393;
  --plum: #8e3a82;
  --line: rgba(255, 209, 102, 0.22);
  --shadow: 0 30px 80px -30px rgba(40, 0, 20, 0.85);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--ink);
  font-family: ui-rounded, "SF Pro Rounded", "Inter", system-ui, -apple-system, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

body {
  position: relative;
  display: grid;
  place-items: center;
  padding: max(24px, env(safe-area-inset-top)) 24px max(24px, env(safe-area-inset-bottom));
  background:
    radial-gradient(900px 600px at 18% -10%, rgba(255, 192, 122, 0.28), transparent 60%),
    radial-gradient(800px 600px at 92% 8%, rgba(255, 122, 162, 0.26), transparent 60%),
    radial-gradient(900px 700px at 50% 110%, rgba(255, 209, 102, 0.18), transparent 60%),
    var(--bg);
}

#confetti {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 460px;
  padding: 30px 26px 26px;
  background: linear-gradient(160deg, rgba(90, 22, 64, 0.82), rgba(58, 13, 42, 0.86));
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  text-align: center;
  overflow: hidden;
}

.card::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: 26px;
  pointer-events: none;
  background: linear-gradient(140deg, rgba(255, 209, 102, 0.30), rgba(255, 176, 136, 0.06) 40%, transparent 70%);
  mix-blend-mode: screen;
  opacity: 0.7;
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.32em;
  font-size: 11px;
  color: var(--ink-faint);
}

.title {
  margin: 0;
  display: grid;
  gap: 2px;
  line-height: 0.95;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: clamp(38px, 10.5vw, 60px);
}

.line {
  display: inline-block;
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 6px 18px rgba(255, 122, 162, 0.28));
}

.line-top {
  background-image: linear-gradient(180deg, var(--gold-hi), var(--gold) 60%, var(--gold-deep));
  transform: rotate(-1.5deg);
}

.line-mid {
  background-image: linear-gradient(180deg, var(--peach-hi), var(--peach) 55%, var(--peach-deep));
  font-style: italic;
  font-size: 1.05em;
  letter-spacing: -0.03em;
}

.line-bot {
  background-image: linear-gradient(180deg, var(--rose-hi), var(--rose) 50%, var(--magenta));
  transform: rotate(1.5deg);
}

.bang {
  display: inline-block;
  background-image: linear-gradient(180deg, var(--gold-hi), var(--rose));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
  margin-left: 2px;
  animation: bang 1.6s cubic-bezier(.22,.9,.3,1.2) infinite;
  transform-origin: bottom left;
}

@keyframes bang {
  0%, 70%, 100% { transform: rotate(0deg) scale(1); }
  78%           { transform: rotate(-12deg) scale(1.18); }
  86%           { transform: rotate(10deg) scale(1.10); }
  92%           { transform: rotate(-3deg) scale(1.02); }
}

.cake {
  position: relative;
  width: 200px;
  height: 170px;
  margin: 26px auto 8px;
}

.plate {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 200px;
  height: 14px;
  border-radius: 50%;
  background: linear-gradient(180deg, #fbe4d4, #c89678 60%, #6b4332);
  box-shadow: 0 10px 22px -8px rgba(0, 0, 0, 0.7);
}

.layer {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 12px 12px 6px 6px;
  box-shadow:
    inset 0 -6px 0 rgba(0, 0, 0, 0.18),
    inset 0 2px 0 rgba(255, 255, 255, 0.22),
    0 8px 18px -8px rgba(0, 0, 0, 0.6);
}

.layer-bottom {
  bottom: 12px;
  width: 168px;
  height: 50px;
  background: linear-gradient(180deg, var(--rose-hi), var(--rose) 70%, var(--rose-deep));
}

.layer-middle {
  bottom: 60px;
  width: 132px;
  height: 42px;
  background: linear-gradient(180deg, var(--peach-hi), var(--peach) 70%, var(--peach-deep));
}

.layer-top {
  bottom: 100px;
  width: 96px;
  height: 36px;
  background: linear-gradient(180deg, var(--gold-hi), var(--gold) 70%, var(--gold-deep));
}

.drip {
  position: absolute;
  width: 14px;
  height: 18px;
  border-radius: 0 0 8px 8px;
  background: inherit;
}

.drip-1 { left: 30%; bottom: 56px; background: var(--peach-hi); }
.drip-2 { left: 60%; bottom: 56px; width: 10px; height: 14px; background: var(--peach); }
.drip-3 { left: 38%; bottom: 96px; background: var(--gold-hi); }
.drip-4 { left: 58%; bottom: 96px; width: 10px; height: 14px; background: var(--gold); }

.candle {
  position: absolute;
  left: 50%;
  bottom: 134px;
  transform: translateX(-50%);
  width: 10px;
  height: 26px;
  border-radius: 3px;
  background: repeating-linear-gradient(
    180deg,
    #fff8f0 0 6px,
    var(--rose) 6px 12px
  );
  box-shadow:
    inset 0 -3px 0 rgba(0, 0, 0, 0.2),
    inset 0 2px 0 rgba(255, 255, 255, 0.55);
}

.wick {
  position: absolute;
  left: 50%;
  top: -4px;
  transform: translateX(-50%);
  width: 2px;
  height: 5px;
  background: #2a1a05;
  border-radius: 1px;
}

.flame {
  position: absolute;
  left: 50%;
  top: -22px;
  transform: translateX(-50%);
  width: 14px;
  height: 22px;
  pointer-events: none;
  filter: drop-shadow(0 0 10px rgba(255, 200, 100, 0.85));
}

.flame-outer,
.flame-inner {
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  border-radius: 50% 50% 50% 50% / 60% 60% 40% 40%;
  transform-origin: 50% 100%;
  animation: flicker 1.4s ease-in-out infinite;
}

.flame-outer {
  width: 14px;
  height: 22px;
  background: radial-gradient(circle at 50% 80%, #fff2b0 0%, #ffaa3a 50%, #ff5d2a 100%);
}

.flame-inner {
  width: 7px;
  height: 12px;
  background: radial-gradient(circle at 50% 80%, #ffffff 0%, #fff1a8 60%, #ffd56b 100%);
  animation-duration: 0.9s;
}

@keyframes flicker {
  0%, 100% { transform: translateX(-50%) scale(1, 1) skewX(0deg); }
  25%      { transform: translateX(-52%) scale(0.96, 1.06) skewX(-2deg); }
  50%      { transform: translateX(-48%) scale(1.04, 0.96) skewX(2deg); }
  75%      { transform: translateX(-51%) scale(0.98, 1.04) skewX(-1deg); }
}

.sparkle {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold-hi);
  box-shadow: 0 0 10px var(--gold);
  opacity: 0;
  animation: twinkle 2.6s ease-in-out infinite;
}

.sparkle.s1 { top: 8px;  left: 22%; animation-delay: 0s;   }
.sparkle.s2 { top: 22px; right: 20%; animation-delay: 0.7s; }
.sparkle.s3 { top: 0;    left: 50%;  animation-delay: 1.4s; }
.sparkle.s4 { top: 36px; right: 38%; animation-delay: 2.0s; background: var(--rose-hi); box-shadow: 0 0 10px var(--rose); }

@keyframes twinkle {
  0%, 100% { opacity: 0; transform: scale(0.6); }
  40%      { opacity: 1; transform: scale(1.2); }
  60%      { opacity: 0.7; transform: scale(1); }
}

.balloons {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: 26px;
}

.balloon {
  position: absolute;
  bottom: -40px;
  width: 22px;
  height: 28px;
  border-radius: 50% 50% 50% 50% / 55% 55% 45% 45%;
  opacity: 0.85;
  filter: drop-shadow(0 6px 12px rgba(0, 0, 0, 0.4));
  animation: float 9s ease-in-out infinite;
}

.balloon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 100%;
  width: 1px;
  height: 36px;
  background: rgba(255, 248, 240, 0.4);
  transform: translateX(-50%);
}

.balloon.b1 {
  left: 8%;
  background: radial-gradient(circle at 35% 30%, var(--rose-hi), var(--rose) 60%, var(--rose-deep));
  animation-delay: 0s;
}

.balloon.b2 {
  left: 86%;
  background: radial-gradient(circle at 35% 30%, var(--peach-hi), var(--peach) 60%, var(--peach-deep));
  animation-delay: 1.6s;
  width: 18px;
  height: 24px;
}

.balloon.b3 {
  left: 16%;
  background: radial-gradient(circle at 35% 30%, var(--gold-hi), var(--gold) 60%, var(--gold-deep));
  animation-delay: 3.2s;
  width: 16px;
  height: 22px;
}

.balloon.b4 {
  left: 78%;
  background: radial-gradient(circle at 35% 30%, #f7c0e9, var(--magenta) 60%, var(--plum));
  animation-delay: 4.8s;
  width: 19px;
  height: 25px;
}

@keyframes float {
  0%   { transform: translateY(0)     translateX(0); opacity: 0; }
  10%  { opacity: 0.9; }
  50%  { transform: translateY(-220px) translateX(8px); }
  90%  { opacity: 0.9; }
  100% { transform: translateY(-440px) translateX(-6px); opacity: 0; }
}

.message {
  margin: 18px auto 18px;
  max-width: 32ch;
  font-size: 15px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.primary {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  border: 0;
  cursor: pointer;
  padding: 12px 22px;
  border-radius: 999px;
  font: inherit;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #3a1408;
  background: linear-gradient(180deg, var(--gold-hi), var(--gold) 55%, var(--peach-deep));
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.6),
    inset 0 -2px 0 rgba(120, 60, 10, 0.45),
    0 14px 28px -10px rgba(255, 209, 102, 0.55),
    0 0 0 1px rgba(0, 0, 0, 0.25);
  transition: transform 120ms ease, box-shadow 120ms ease;
  -webkit-tap-highlight-color: transparent;
}

.primary:hover { transform: translateY(-1px); }
.primary:active { transform: translateY(1px) scale(0.99); }

.primary:focus-visible {
  outline: 2px solid var(--rose);
  outline-offset: 4px;
}

.primary .emoji { font-size: 18px; }

@media (max-width: 380px) {
  .cake { transform: scale(0.92); }
  .card { padding: 24px 20px 22px; }
}

@media (prefers-reduced-motion: reduce) {
  .bang, .flame-outer, .flame-inner, .sparkle, .balloon { animation: none; }
}