@font-face {
  font-family: "Pacifico";
  src: url("../assets/fonts/Pacifico-Regular.ttf") format("truetype");
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

#intro-cake-screen,
#intro-cake-screen *,
#intro-cake-screen *::before,
#intro-cake-screen *::after {
  box-sizing: border-box;
}

#intro-cake-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: url("../assets/cover/backgroud.jpg") center / cover no-repeat;
  background-color: #fce4ec;
  overflow: hidden;
  overscroll-behavior: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100dvh;
  height: 100dvh;
  max-height: 100dvh;
  padding-bottom: clamp(2rem, 6.5vh, 5rem);
}

#intro-cake-screen[hidden] {
  display: none !important;
}

#intro-cake-screen:not([hidden]) {
  display: flex;
  /* Cao hơn màn chạm quà (z-index 10000) khi cả hai cùng lúc fade */
  z-index: 10001;
}

/* Che vùng trên — trong suốt để không lặp ảnh nền (tránh 2 lớp cover lệch nhau) */
#intro-cake-screen .top-fall-mask {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: clamp(100px, 32vh, 380px);
  background: transparent;
  z-index: 0;
  pointer-events: none;
}

#intro-cake-screen .intro-cake-scene {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform-origin: center center;
  margin-top: clamp(-6.75rem, -11.5vh, -3.5rem);
}

#intro-cake-screen #intro-cake-svg {
  display: block;
  position: relative;
  width: 270px;
  height: auto;
  margin: -13.5em auto 0 auto;
  overflow: visible;
}

/* ============================================== Candle */

#intro-cake-screen .velas {
  /* Sáp hồng/ivory — tách khỏi kem bánh (#fefae9) và nền sáng */
  background: linear-gradient(
    180deg,
    #f4e0ea 0%,
    #deb2c4 52%,
    #c9899e 100%
  );
  border-radius: 10px;
  position: absolute;
  top: 308px;
  left: 50%;
  margin-left: -3.3px;
  margin-top: -11px;
  width: 7px;
  height: 47px;
  transform: translateY(-405px);
  backface-visibility: hidden;
  box-shadow:
    inset 0 0 0 1px rgba(120, 40, 70, 0.12),
    0 2px 5px rgba(90, 30, 55, 0.22);
  animation: intro-cake-in 500ms 4s ease-out forwards;
}

#intro-cake-screen .velas:after,
#intro-cake-screen .velas:before {
  background: rgba(140, 35, 72, 0.42);
  content: "";
  position: absolute;
  width: 100%;
  height: 2.22222222px;
}

#intro-cake-screen .velas:after {
  top: 25%;
  left: 0;
}

#intro-cake-screen .velas:before {
  top: 45%;
  left: 0;
}

/* ============================================== Fire */

#intro-cake-screen .fuego {
  border-radius: 100%;
  position: absolute;
  top: -27px;
  left: 50%;
  margin-left: -3.5px;
  width: 9px;
  height: 25px;
  transition:
    opacity 0.45s ease,
    box-shadow 0.45s ease,
    transform 0.45s ease,
    background 0.45s ease;
}

#intro-cake-screen .fuego:nth-child(1) {
  animation: intro-cake-fuego 2s 4.5s infinite;
}

#intro-cake-screen .fuego:nth-child(2) {
  animation: intro-cake-fuego 1.5s 4.5s infinite;
}

#intro-cake-screen .fuego:nth-child(3) {
  animation: intro-cake-fuego 1s 4.5s infinite;
}

#intro-cake-screen .fuego:nth-child(4) {
  animation: intro-cake-fuego 0.5s 4.5s infinite;
}

#intro-cake-screen .fuego:nth-child(5) {
  animation: intro-cake-fuego 0.2s 4.5s infinite;
}

#intro-cake-screen .intro-cake-scene.is-candle-out .fuego {
  animation: none !important;
  opacity: 0;
  visibility: hidden;
  background: transparent;
  box-shadow: none;
  transform: scale(0.2) translateY(8px);
}

/* ============================================== Animation Fire */

@keyframes intro-cake-fuego {
  0%,
  100% {
    background: rgba(255, 200, 95, 0.82);
    box-shadow:
      0 0 14px 4px rgba(255, 160, 80, 0.55),
      0 0 36px 12px rgba(255, 110, 90, 0.28);
    transform: translateY(0) scale(1);
  }
  50% {
    background: rgba(255, 85, 45, 0.45);
    box-shadow:
      0 0 18px 8px rgba(255, 130, 60, 0.4),
      0 0 42px 18px rgba(255, 60, 80, 0.22);
    transform: translateY(-20px) scale(0);
  }
}

@keyframes intro-cake-in {
  to {
    transform: translateY(0);
  }
}

/* Sau crema: 4.6s */
@keyframes intro-cake-textReveal {
  from {
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
}

#intro-cake-screen .intro-cake-text {
  position: relative;
  z-index: 5;
  color: #a04565;
  font-family: "Pacifico", cursive, sans-serif;
  font-weight: normal;
  font-style: normal;
  font-size: 1.3rem;
  text-align: center;
}

#intro-cake-screen .intro-cake-text .text-lines {
  opacity: 0;
  visibility: hidden;
  animation: intro-cake-textReveal 0.75s ease-out 4.6s forwards;
}

#intro-cake-screen .intro-cake-text .text-btn-wrap {
  opacity: 0;
  visibility: hidden;
  animation: intro-cake-textReveal 0.65s ease-out 5.35s forwards;
}

#intro-cake-screen .intro-cake-text h1 {
  font-size: 2.05em;
  margin: 0.35em 0 0.2em;
}

#intro-cake-screen .intro-cake-text p {
  margin: 0;
  font-size: 1.35em;
}

@keyframes intro-cake-natureGlow {
  0%,
  100% {
    box-shadow:
      0 2px 14px rgba(80, 40, 60, 0.2),
      0 0 0 1px rgba(255, 255, 255, 0.95) inset,
      0 0 6px 2px rgba(255, 255, 255, 0.85),
      0 0 18px 4px rgba(255, 182, 210, 0.65),
      0 0 28px 8px rgba(255, 140, 180, 0.35);
  }
  50% {
    box-shadow:
      0 3px 18px rgba(80, 40, 60, 0.24),
      0 0 0 1px rgba(255, 255, 255, 1) inset,
      0 0 12px 4px rgba(255, 255, 255, 0.95),
      0 0 26px 10px rgba(255, 200, 220, 0.85),
      0 0 42px 14px rgba(255, 120, 170, 0.45);
  }
}

#intro-cake-screen .text-btn-wrap .nature-btn {
  margin-top: 1.35rem;
}

#intro-cake-screen .nature-btn {
  position: relative;
  z-index: 1;
  padding: 0.45rem 0.65rem;
  border: none;
  border-radius: 22px;
  /* Nền đủ đặc để mây trong ảnh cover (đặc biệt máy ngang) không “xuyên” qua nút */
  background: rgba(255, 255, 255, 0.94);
  box-shadow:
    0 2px 14px rgba(80, 40, 60, 0.18),
    0 0 0 1px rgba(255, 255, 255, 0.9) inset;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    box-shadow 0.2s ease;
  animation: intro-cake-natureGlow 2.4s ease-in-out 5.35s infinite;
}

#intro-cake-screen .nature-btn img {
  display: block;
  width: 52px;
  height: 52px;
  object-fit: contain;
  pointer-events: none;
}

#intro-cake-screen .nature-btn:hover {
  transform: translateY(-2px);
  background: #fff;
  box-shadow:
    0 4px 20px rgba(80, 40, 60, 0.22),
    0 0 0 1px rgba(255, 255, 255, 1) inset;
}

#intro-cake-screen .nature-btn:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  #intro-cake-screen .intro-cake-text .text-lines,
  #intro-cake-screen .intro-cake-text .text-btn-wrap {
    animation: none;
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  #intro-cake-screen .nature-btn {
    animation: none;
    box-shadow:
      0 2px 14px rgba(80, 40, 60, 0.2),
      0 0 0 1px rgba(255, 255, 255, 0.95) inset,
      0 0 10px 3px rgba(255, 220, 235, 0.75),
      0 0 22px 6px rgba(255, 160, 190, 0.4);
  }
}

@media (max-height: 620px) {
  #intro-cake-screen .intro-cake-scene {
    transform: scale(0.82);
  }
}

@media (max-height: 500px) {
  #intro-cake-screen .intro-cake-scene {
    transform: scale(0.68);
  }
}

@media (max-height: 400px) {
  #intro-cake-screen .intro-cake-scene {
    transform: scale(0.56);
  }
}

@media (max-height: 320px) {
  #intro-cake-screen .intro-cake-scene {
    transform: scale(0.46);
  }
}

/* Cùng breakpoint #bg-base (album/thư): nền intro bánh trên iPad */
@media (min-width: 1024px) and (max-width: 1366px) {
  #intro-cake-screen {
    background-image: url("../assets/cover/backgroudIpad.jpg");
  }
}