:root {
  --bg-top: #09050c;
  --bg-mid: #120814;
  --bg-bottom: #040205;
  --card: rgba(20, 9, 22, 0.8);
  --card-border: rgba(255, 149, 202, 0.24);
  --text-main: #ffd7ef;
  --text-soft: #e5a4ca;
  --accent: #ff6ba7;
  --accent-deep: #ff2f85;
  --accent-gold: #ffc857;
  --cake-top: #ff8dc2;
  --cake-side: #ff4c96;
  --plate: #2a1128;
  --shadow: rgba(255, 45, 133, 0.22);
  --button-shadow: rgba(255, 47, 133, 0.38);
  --panel-glow: rgba(255, 96, 170, 0.18);
  --stage-bg: rgba(255, 108, 167, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Trebuchet MS", "Segoe Print", "Comic Sans MS", cursive;
  background:
    radial-gradient(circle at 18% 12%, rgba(255, 82, 154, 0.28), transparent 24%),
    radial-gradient(circle at 82% 22%, rgba(255, 120, 188, 0.22), transparent 21%),
    radial-gradient(circle at 50% 120%, rgba(255, 44, 133, 0.18), transparent 30%),
    linear-gradient(180deg, var(--bg-top), var(--bg-mid) 48%, var(--bg-bottom));
  color: var(--text-main);
  overflow-x: hidden;
}

.sky-glow {
  position: fixed;
  inset: auto;
  width: 22rem;
  height: 22rem;
  border-radius: 50%;
  filter: blur(30px);
  opacity: 0.52;
  pointer-events: none;
  z-index: 0;
}

.sky-glow-left {
  top: -7rem;
  left: -6rem;
  background: rgba(255, 55, 150, 0.8);
}

.sky-glow-right {
  right: -8rem;
  bottom: -7rem;
  background: rgba(255, 131, 204, 0.72);
}

.page-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem 1.25rem;
  position: relative;
  z-index: 1;
}

.hero-card {
  width: min(100%, 48rem);
  padding: 2rem 1.5rem 2.4rem;
  text-align: center;
  background:
    linear-gradient(180deg, rgba(33, 13, 36, 0.88), rgba(11, 5, 14, 0.92)),
    var(--card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  border-radius: 2rem;
  box-shadow:
    0 1.8rem 4rem rgba(0, 0, 0, 0.5),
    0 0 0 1px rgba(255, 145, 201, 0.08),
    0 0 3rem var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at top, rgba(255, 145, 210, 0.18), transparent 28%),
    linear-gradient(135deg, rgba(255, 255, 255, 0.04), transparent 45%);
  pointer-events: none;
}

.eyebrow {
  margin: 0 0 0.5rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--text-soft);
}

h1 {
  margin: 0;
  font-size: clamp(2.2rem, 7vw, 4.3rem);
  line-height: 0.95;
}

.intro {
  width: min(100%, 34rem);
  margin: 1rem auto 0;
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-soft);
}

.cake-stage {
  position: relative;
  margin: 2.5rem auto 1.6rem;
  width: min(100%, 24rem);
  min-height: 20rem;
  display: grid;
  place-items: center;
  touch-action: none;
  padding: 1.25rem 0.75rem 1rem;
  border-radius: 1.8rem;
  background:
    radial-gradient(circle at 50% 16%, rgba(255, 104, 177, 0.18), transparent 28%),
    linear-gradient(180deg, rgba(37, 14, 40, 0.92), rgba(17, 7, 20, 0.96));
  box-shadow:
    inset 0 0 0 1px rgba(255, 132, 197, 0.12),
    0 1.25rem 2.75rem rgba(0, 0, 0, 0.28),
    0 0 2.25rem var(--panel-glow);
}

.sparkles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.sparkles span {
  position: absolute;
  width: 0.8rem;
  height: 0.8rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 198, 229, 0.95), rgba(255, 255, 255, 0));
  animation: sparkle 2.8s ease-in-out infinite;
}

.sparkles span:nth-child(1) {
  top: 14%;
  left: 12%;
  animation-delay: 0s;
}

.sparkles span:nth-child(2) {
  top: 24%;
  right: 9%;
  animation-delay: 0.45s;
}

.sparkles span:nth-child(3) {
  top: 50%;
  left: 4%;
  animation-delay: 1s;
}

.sparkles span:nth-child(4) {
  top: 58%;
  right: 4%;
  animation-delay: 1.4s;
}

.sparkles span:nth-child(5) {
  top: 8%;
  left: 48%;
  animation-delay: 1.9s;
}

.sparkles span:nth-child(6) {
  top: 70%;
  left: 28%;
  animation-delay: 2.2s;
}

.cake-wrapper {
  position: relative;
  width: 18rem;
  display: grid;
  place-items: end center;
}

.candle {
  position: absolute;
  top: 1.1rem;
  display: grid;
  place-items: start center;
  z-index: 3;
}

.wick {
  width: 0.18rem;
  height: 1.1rem;
  margin-top: 2.35rem;
  border-radius: 999px;
  background: #f7d4e1;
}

.flame-wrap {
  position: absolute;
  top: -0.05rem;
  width: 2.3rem;
  height: 3rem;
  transform-origin: center bottom;
  animation: flameDance 0.9s ease-in-out infinite;
  transition: opacity 0.45s ease, transform 0.45s ease, filter 0.45s ease;
}

.flame-wrap::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0.2rem;
  width: 3.8rem;
  height: 1.2rem;
  transform: translateX(-50%);
  background: radial-gradient(circle, rgba(255, 204, 92, 0.55), rgba(255, 204, 92, 0));
  filter: blur(4px);
}

.flame-outer,
.flame-core {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 60% 60% 52% 52%;
}

.flame-outer {
  bottom: 0;
  width: 1.9rem;
  height: 2.7rem;
  background: linear-gradient(180deg, #fff7b1 0%, #ffc752 45%, #ff7e4a 100%);
  clip-path: path("M15.4 1.5C12.4 2.6 9.8 5.3 9 8.7c-.9 4 1.7 6 1.7 8.8 0 3.5-2.4 5.8-2.4 8.8 0 4.4 3.3 7.4 7.2 7.4 5 0 9-4.1 9-9.5 0-3.3-2.3-5.7-3.3-8.3-1-2.5-1-4.6-2.1-7.2C18.2 5.3 17.2 2.8 15.4 1.5Z");
  filter: drop-shadow(0 0 0.9rem rgba(255, 181, 82, 0.75));
}

.flame-core {
  bottom: 0.4rem;
  width: 0.9rem;
  height: 1.45rem;
  background: linear-gradient(180deg, #fffceb 0%, #fff4a9 100%);
  opacity: 0.95;
}

.hero-card.is-extinguished .flame-wrap {
  opacity: 0;
  transform: translateY(0.45rem) scale(0.3);
  filter: blur(5px);
}

.smoke {
  position: absolute;
  top: 0.15rem;
  width: 3.4rem;
  height: 4.8rem;
  opacity: 0;
  pointer-events: none;
}

.smoke span {
  position: absolute;
  bottom: 0.5rem;
  left: 50%;
  width: 1rem;
  height: 1rem;
  margin-left: -0.5rem;
  border-radius: 50%;
  background: rgba(164, 149, 171, 0.38);
  filter: blur(2px);
}

.hero-card.is-extinguished .smoke {
  opacity: 1;
}

.hero-card.is-extinguished .smoke span:nth-child(1) {
  --drift: -0.65rem;
  animation: smokeRise 1.7s ease-out forwards;
}

.hero-card.is-extinguished .smoke span:nth-child(2) {
  --drift: 0.35rem;
  animation: smokeRise 1.7s 0.2s ease-out forwards;
}

.hero-card.is-extinguished .smoke span:nth-child(3) {
  --drift: 1rem;
  animation: smokeRise 1.7s 0.38s ease-out forwards;
}

.cake {
  position: relative;
  width: 15rem;
  padding-top: 3.5rem;
}

.frosting-top {
  position: relative;
  width: 15rem;
  height: 5rem;
  margin: 0 auto;
  background: linear-gradient(180deg, #ffb7d7 0%, var(--cake-top) 100%);
  border-radius: 50% 50% 42% 42%;
  box-shadow:
    inset 0 -0.65rem 0 rgba(255, 216, 234, 0.38),
    0 0 2rem rgba(255, 79, 155, 0.12);
}

.cake-side {
  position: relative;
  width: 14rem;
  height: 7rem;
  margin: -1.35rem auto 0;
  background: linear-gradient(180deg, #ff73b0 0%, var(--cake-side) 100%);
  border-radius: 0 0 2.4rem 2.4rem;
  box-shadow:
    inset 0 -0.85rem 0 rgba(255, 168, 203, 0.42),
    0 0 2rem rgba(255, 61, 141, 0.14);
}

.drip {
  position: absolute;
  top: -1rem;
  width: 2rem;
  background: linear-gradient(180deg, #ffdce5 0%, #ffbad0 100%);
  border-radius: 0 0 1.2rem 1.2rem;
}

.drip-a {
  left: 1.4rem;
  height: 2.2rem;
}

.drip-b {
  left: 5.8rem;
  height: 3rem;
}

.drip-c {
  right: 1.65rem;
  height: 2.5rem;
}

.sprinkle {
  position: absolute;
  width: 1rem;
  height: 0.35rem;
  border-radius: 999px;
}

.sprinkle-a {
  top: 1.25rem;
  left: 2.4rem;
  background: #ff8ca4;
  transform: rotate(18deg);
}

.sprinkle-b {
  top: 2rem;
  left: 5.1rem;
  background: #ffd264;
  transform: rotate(-24deg);
}

.sprinkle-c {
  top: 1.65rem;
  right: 4.9rem;
  background: #86d7ff;
  transform: rotate(36deg);
}

.sprinkle-d {
  top: 2.25rem;
  right: 2.1rem;
  background: #9df0a4;
  transform: rotate(-15deg);
}

.sprinkle-e {
  top: 1rem;
  left: 7.1rem;
  background: #c79bff;
  transform: rotate(-38deg);
}

.sprinkle-f {
  top: 2.6rem;
  left: 9rem;
  background: #ff8a79;
  transform: rotate(24deg);
}

.plate {
  width: 17rem;
  height: 2rem;
  margin: -0.35rem auto 0;
  background: linear-gradient(180deg, #51304d 0%, var(--plate) 100%);
  border-radius: 50%;
  box-shadow:
    0 1rem 1.6rem rgba(0, 0, 0, 0.35),
    0 0 1.5rem rgba(255, 99, 173, 0.1);
}

.meter-wrap {
  width: min(100%, 18rem);
  margin: 0 auto;
}

.meter-label {
  margin-bottom: 0.45rem;
  font-size: 0.9rem;
  color: var(--text-soft);
}

.meter {
  width: 100%;
  height: 0.8rem;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 206, 229, 0.08);
  box-shadow: inset 0 0 0 1px rgba(255, 118, 185, 0.18);
}

.meter-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #ffd264, #ff8ca4, #ff586d);
  transition: width 0.1s linear;
}

.status-text {
  min-height: 1.6rem;
  margin: 1rem auto 0;
  color: var(--text-soft);
}

.birthday-button {
  margin-top: 1.3rem;
  border: 0;
  border-radius: 999px;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-deep) 100%);
  color: #fffdf8;
  font: inherit;
  font-size: 1.12rem;
  cursor: pointer;
  box-shadow:
    0 1rem 2rem var(--button-shadow),
    0 0 1.6rem rgba(255, 73, 157, 0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem) scale(0.92);
  pointer-events: none;
  transition:
    opacity 0.55s ease,
    transform 0.55s cubic-bezier(0.2, 0.8, 0.2, 1),
    box-shadow 0.25s ease;
}

.birthday-button:hover,
.birthday-button:focus-visible {
  box-shadow:
    0 1.2rem 2.4rem rgba(255, 47, 133, 0.42),
    0 0 2rem rgba(255, 110, 175, 0.32);
  transform: translateY(-0.12rem) scale(1.02);
  outline: none;
}

.hero-card.is-ready .birthday-button {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.birthday-button:disabled {
  cursor: default;
}

.wish-text {
  margin: 0.9rem 0 0;
  font-size: 1.05rem;
  color: var(--accent-deep);
  opacity: 0;
  transform: translateY(0.6rem);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.hero-card.is-celebrating .wish-text {
  opacity: 1;
  transform: translateY(0);
}

.message-stack {
  position: fixed;
  inset: 0;
  z-index: 20;
  pointer-events: none;
}

.cool-message {
  position: absolute;
  top: 50%;
  margin: 0;
  max-width: min(19rem, 34vw);
  padding: 0;
  border: 0;
  background: none;
  box-shadow: none;
  color: rgba(255, 186, 226, 0.84);
  font-size: clamp(1.15rem, 2.2vw, 1.75rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0.01em;
  text-shadow:
    0 0 0.35rem rgba(255, 232, 244, 0.34),
    0 0 1.6rem rgba(255, 91, 169, 0.24);
  mix-blend-mode: screen;
  opacity: 0;
  transition:
    opacity 0.65s ease,
    transform 0.65s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.cool-message-left {
  left: clamp(1rem, 4vw, 3rem);
  text-align: left;
  transform: translate3d(-1.5rem, -50%, 0) rotate(3deg) scale(0.92);
}

.cool-message-right {
  right: clamp(1rem, 4vw, 3rem);
  text-align: right;
  transform: translate3d(1.5rem, -50%, 0) rotate(-3deg) scale(0.92);
}

.cool-message.is-visible {
  opacity: 1;
}

.cool-message-left.is-visible,
.cool-message-right.is-visible {
  transform: translate3d(0, -50%, 0) rotate(0deg) scale(1);
}

.confetti-layer {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 30;
}

.confetti-piece {
  position: absolute;
  top: -10vh;
  width: 0.8rem;
  height: 1.2rem;
  border-radius: 0.25rem;
  opacity: 0.95;
  left: var(--start-x);
  background: var(--confetti-color);
  transform: translate3d(0, -12vh, 0) rotate(0deg);
  animation: confettiFall var(--fall-duration) linear forwards;
}

.confetti-piece::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(255, 255, 255, 0.25);
}

@keyframes flameDance {
  0%,
  100% {
    transform: rotate(-3deg) scaleY(1);
  }
  50% {
    transform: rotate(4deg) scaleY(1.04);
  }
}

@keyframes sparkle {
  0%,
  100% {
    opacity: 0.25;
    transform: scale(0.85);
  }
  50% {
    opacity: 0.95;
    transform: scale(1.2);
  }
}

@keyframes smokeRise {
  0% {
    opacity: 0.45;
    transform: translate(-50%, 0) scale(0.72);
  }
  100% {
    opacity: 0;
    transform: translate(calc(-50% + var(--drift, 0.8rem)), -3.5rem) scale(1.7);
  }
}

@keyframes confettiFall {
  0% {
    transform: translate3d(0, -12vh, 0) rotate(0deg);
  }
  100% {
    transform: translate3d(var(--drift-x), 115vh, 0) rotate(var(--spin));
  }
}

@media (max-width: 600px) {
  .hero-card {
    padding: 1.65rem 1rem 2rem;
    border-radius: 1.6rem;
  }

  .cake-stage {
    min-height: 17rem;
  }

  .cake-wrapper {
    transform: scale(0.88);
  }

  .intro {
    font-size: 1rem;
  }

  .cool-message {
    top: auto;
    max-width: 12.5rem;
    font-size: 0.98rem;
  }

  .cool-message-left {
    left: 1rem;
    bottom: 6.2rem;
    transform: translate3d(-1rem, 0, 0) rotate(3deg) scale(0.92);
  }

  .cool-message-right {
    right: 1rem;
    bottom: 1.2rem;
    transform: translate3d(1rem, 0, 0) rotate(-3deg) scale(0.92);
  }

  .cool-message-left.is-visible,
  .cool-message-right.is-visible {
    transform: translate3d(0, 0, 0) rotate(0deg) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}