/* Scene 3D styles (scoped when inside scene3d-root) */

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

#scene3d-root * {
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

#scene3d-root canvas {
  display: block;
}

#threejs-canvas {
  position: absolute;
  top: 0;
  left: 0;
  opacity: 1;
  transition: opacity 1s ease-in-out;
  z-index: 0;
}

#threejs-canvas.fade-out {
  opacity: 0;
  pointer-events: none;
}

/* Nhóm trái tim + ảnh + tên (mode days) */
.heart-days-group {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.heart-days-message-slot {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.heart-days-images {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

/* Hai ảnh hai bên trái tim + tên - chỉ mode 'days' */
.heart-side-wrap {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  flex-direction: column;
  align-items: center;
  z-index: 11;
  opacity: 0;
  transition: opacity 0.8s ease-out;
  pointer-events: none;
}

.heart-side-wrap.visible {
  display: flex;
  opacity: 1;
}

.heart-side-left {
  left: 4%;
}

.heart-side-right {
  right: 4%;
}

.heart-side-name {
  margin-top: 52px;
  /* clamp(min, ưu tiên, max): font to hơn, cách ảnh xa hơn */
  font-size: clamp(30px, 4vw, 44px);
  font-weight: 600;
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif;
  color: #ffb6c1;
  text-shadow:
    0 0 12px rgba(255, 105, 180, 0.8),
    0 0 24px rgba(255, 182, 193, 0.5);
  white-space: nowrap;
}

.heart-side-img {
  width: clamp(140px, 28vw, 260px);
  height: clamp(140px, 28vw, 260px);
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid rgba(255, 105, 180, 0.9);
  display: block;
  box-shadow:
    0 0 15px rgba(255, 105, 180, 0.6),
    0 0 30px rgba(255, 182, 193, 0.5),
    0 0 50px rgba(255, 20, 147, 0.35),
    inset 0 0 20px rgba(255, 182, 193, 0.15);
}

#message {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: #ff8fa3;
  font-size: 2em;
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif;
  line-height: 1.25;
  text-align: center;
  max-width: min(80vw, 520px);
  word-wrap: break-word;
  overflow-wrap: break-word;
  opacity: 0;
  transition: opacity 1.5s ease-out;
  pointer-events: none;
  text-shadow:
    0 0 20px rgba(255, 77, 109, 1),
    0 0 40px rgba(255, 77, 109, 0.8),
    0 0 60px rgba(255, 77, 109, 0.6);
  z-index: 10;
  transform-origin: center center;
  transform-style: preserve-3d;
}

/* iOS / màn nhỏ: giảm nhẹ size để tránh text bị cắt trên dưới trong trái tim */
@media (max-width: 430px), (max-height: 700px) {
  #message {
    font-size: 1.7em;
    line-height: 1.3;
    /* iOS cũ dễ bị cắt nửa text khi có shadow glow lớn → giảm hiệu ứng */
    text-shadow: 0 0 16px rgba(255, 77, 109, 0.9);
  }
}

/* Chữ text-only (không có ngày): to như valentineMessageLine1 */
#message .heart-line1 {
  display: block;
  font-size: 1em;
  letter-spacing: 0.05em;
  opacity: 0.95;
}

/* Chữ "Đang Yêu" nhỏ hơn, "X ngày" to hơn (mode days có ngày) */
#message .heart-days-label {
  display: block;
  font-size: 0.65em;
  letter-spacing: 0.15em;
  opacity: 0.95;
  margin-bottom: 0.02em;
  line-height: 1.2;
}

#message .heart-days-number {
  display: block;
  font-size: 1.15em;
  font-weight: 600;
  letter-spacing: 0.02em;
  line-height: 1.2;
}

/* Nút khi ảnh bay (phase quả cầu) */
#btn-flying-corner {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 100;
  display: none;
  padding: 8px 14px;
  font-size: 12px;
  border: none;
  border-radius: 20px;
  background: rgba(255, 105, 180, 0.9);
  color: #fff;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(255, 105, 180, 0.4);
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}

#btn-flying-corner.visible {
  display: block;
}

#btn-flying-corner:hover {
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(255, 105, 180, 0.5);
}

/* Typing effect overlay (thư Valentine) */
#typing-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 150;
  pointer-events: none;
  opacity: 0;
  transition: opacity 1s ease-in;
}

#typing-container.visible {
  display: flex;
  opacity: 1;
}

#typing-text {
  max-width: 80%;
  max-height: 70%;
  padding: 30px;
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif !important;
  font-size: 1.5em;
  font-style: normal;
  color: #ffc0cb;
  text-align: center;
  line-height: 1.6;
  letter-spacing: 0.03em;
  text-shadow:
    0 0 14px rgba(255, 105, 180, 0.55),
    0 0 26px rgba(255, 182, 193, 0.25);
  white-space: pre-wrap;
}

#typing-text .cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: #ffc0cb;
  margin-left: 2px;
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
}

@keyframes blink {
  0%,
  50% {
    opacity: 1;
  }

  51%,
  100% {
    opacity: 0;
  }
}

/* Particles nền (phase quả cầu) — giống universe/imageheart.html */
.particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 1;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 105, 180, 0.6);
  border-radius: 50%;
  animation: float 15s infinite ease-in-out;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }

  10% {
    opacity: 1;
  }

  80% {
    opacity: 1;
  }

  90%,
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ========== KIỂU THƯ CUPID (Letter Type: Cupid) ========== */
#cupid-letter-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 200;
  pointer-events: none;
}

#cupid-letter-overlay.visible {
  display: flex;
  pointer-events: auto;
}

#cupid-letter-overlay .cupid-space {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#cupid-flying-img {
  position: absolute;
  width: clamp(120px, 25vw, 220px);
  height: auto;
  pointer-events: none;
  transform: translate(-50%, -50%);
  z-index: 210;
}

#letter-envelope-img {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: clamp(140px, 30vw, 260px);
  height: auto;
  cursor: pointer;
  display: none;
  z-index: 215;
  transition: transform 0.2s ease;
}

#letter-envelope-img.visible {
  display: block;
  animation: cupidLetterFadeIn 0.5s ease-out;
}

#letter-envelope-img:hover {
  transform: translate(-50%, -50%) scale(1.06);
}

#cupid-letter-frame {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(92vw, 720px);
  max-width: 92vw;
  max-height: 76vh;
  overflow: visible;
  display: none;
  flex-direction: column;
  z-index: 220;
  border-radius: clamp(12px, 2.5vw, 20px);
  box-shadow:
    0 20px 60px rgba(255, 105, 180, 0.35),
    0 0 0 1px rgba(255, 182, 193, 0.3);
  background: linear-gradient(
    135deg,
    #ffd1dc 0%,
    #ffe4e9 25%,
    #fff0f5 50%,
    #ffe4ec 75%,
    #ffc0cb 100%
  );
  pointer-events: auto;
}

#cupid-letter-frame.visible {
  display: flex;
  animation: cupidLetterFadeIn 0.6s ease-out;
}

@keyframes cupidLetterFadeIn {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) scale(0.9);
  }

  to {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
  }
}

#cupid-letter-frame .letter-content {
  padding: clamp(20px, 4vw, 32px) clamp(20px, 4vw, 36px) clamp(60px, 9vw, 90px);
  overflow-y: auto;
  max-height: 72vh;
  scrollbar-width: none;
  -ms-overflow-style: none;
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif !important;
  font-size: clamp(0.95rem, 2vw, 1.2em);
  font-style: normal;
  color: #8b3a62;
  line-height: 1.75;
  letter-spacing: 0.02em;
  text-align: center;
  white-space: pre-wrap;
}

#cupid-letter-frame .letter-content::-webkit-scrollbar {
  display: none;
}

#cupid-letter-frame .letter-content .letter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: #8b3a62;
  margin-left: 2px;
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
}

#cupid-letter-frame .cupid-frame-left {
  position: absolute;
  left: 0;
  top: 35%;
  transform: translate(-50%, -50%);
  width: clamp(70px, 18vw, 120px);
  height: auto;
  z-index: 1;
  pointer-events: none;
}

#cupid-letter-frame .cupid-frame-right {
  position: absolute;
  right: 0;
  top: 68%;
  transform: translate(50%, -50%);
  width: clamp(85px, 22vw, 150px);
  height: auto;
  z-index: 1;
  pointer-events: none;
}

/* TYPING: thư trong không gian (không nền), cupid nổi ở góc */
#letter-typing-space {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 205;
  pointer-events: none;
}

#letter-typing-space.visible {
  display: flex;
}

#letter-typing-space .letter-typing-text {
  max-width: 80%;
  max-height: 70%;
  padding: 30px 30px 60px;
  pointer-events: none;
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif !important;
  font-size: 1.5em;
  font-style: normal;
  color: #ffb6c1;
  text-align: center;
  line-height: 1.6;
  letter-spacing: 0.03em;
  text-shadow:
    0 0 8px rgba(255, 182, 193, 0.9),
    0 0 18px rgba(255, 105, 180, 0.7),
    0 0 30px rgba(255, 105, 180, 0.55),
    0 0 48px rgba(255, 182, 193, 0.45);
  white-space: pre-wrap;
  overflow-y: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

#cupid-letter-frame .letter-content,
#letter-typing-space .letter-typing-text {
  position: relative;
}

.letter-signature {
  position: absolute;
  right: clamp(16px, 4vw, 32px);
  bottom: clamp(12px, 3vw, 24px);
  font-family: "PacificoLocal", "Cormorant Garamond", Georgia, serif;
  font-size: 0.9em;
  opacity: 0.9;
}

#letter-typing-space .letter-typing-text::-webkit-scrollbar {
  display: none;
}

#letter-typing-space .letter-typing-text.typing-complete {
  pointer-events: auto;
  -webkit-overflow-scrolling: touch;
  cursor: default;
}

#cupid-letter-frame .letter-content.typing-complete {
  -webkit-overflow-scrolling: touch;
}

#letter-typing-space .letter-cursor {
  display: inline-block;
  width: 2px;
  height: 1.2em;
  background: #ffb6c1;
  margin-left: 2px;
  box-shadow:
    0 0 8px rgba(255, 105, 180, 0.9),
    0 0 16px rgba(255, 182, 193, 0.6);
  animation: blink 0.8s infinite;
  vertical-align: text-bottom;
}

.cupid-in-space {
  position: absolute;
  width: clamp(120px, 26vw, 200px);
  height: auto;
  z-index: 204;
  pointer-events: none;
  display: none;
}

.cupid-in-space.visible {
  display: block;
}

#cupid-in-space-boy {
  top: 5%;
  left: 5%;
  transform: translate(-30%, 0);
}

#cupid-in-space-girl {
  bottom: 5%;
  right: 5%;
  transform: translate(30%, 0);
}

/* ========== RESPONSIVE MOBILE (Letter Type Cupid + heart-side) ========== */
@media (max-width: 768px) {
  /* Mode days trên mobile: chữ trong tim (đẩy lên chút), ảnh + tên ở dưới trái tim */
  .scene3d-root.heart-mode-days #message {
    top: 62%;
  }

  .scene3d-root.heart-mode-days .heart-side-wrap {
    top: auto;
    bottom: 10%;
    transform: translateY(0);
  }

  .scene3d-root.heart-mode-days .heart-side-left {
    left: 8%;
  }

  .scene3d-root.heart-mode-days .heart-side-right {
    right: 8%;
  }

  .heart-side-img {
    width: clamp(100px, 30vw, 180px);
    height: clamp(100px, 30vw, 180px);
  }

  .heart-side-name {
    font-size: clamp(16px, 3.2vw, 22px);
    margin-top: 16px;
  }

  .heart-side-left {
    left: 2%;
  }

  .heart-side-right {
    right: 2%;
  }

  #cupid-flying-img {
    width: clamp(100px, 35vw, 180px);
  }

  #letter-envelope-img {
    width: clamp(120px, 45vw, 220px);
  }

  #cupid-letter-frame {
    width: min(92vw, 100%);
    max-width: 92vw;
    max-height: 78vh;
    border-radius: 12px;
  }

  #cupid-letter-frame .letter-content {
    padding: 16px 14px 44px;
    /* thêm khoảng trống cho chữ ký */
    max-height: 72vh;
    font-size: 0.95rem;
    line-height: 1.75;
    -webkit-overflow-scrolling: touch;
  }

  #letter-typing-space .letter-typing-text {
    padding-bottom: 80px;
    /* để chữ ký không dính nội dung */
  }

  #cupid-letter-frame .cupid-frame-left {
    top: 32%;
    width: clamp(50px, 20vw, 85px);
  }

  #cupid-letter-frame .cupid-frame-right {
    top: 72%;
    width: clamp(55px, 24vw, 100px);
  }

  #cupid-in-space-boy,
  #cupid-in-space-girl {
    width: clamp(70px, 22vw, 95px);
  }
}

@media (max-width: 480px) {
  .scene3d-root.heart-mode-days #message {
    top: 46%;
  }

  .scene3d-root.heart-mode-days .heart-side-wrap {
    bottom: 8%;
  }

  .scene3d-root.heart-mode-days .heart-side-left {
    left: 5%;
  }

  .scene3d-root.heart-mode-days .heart-side-right {
    right: 5%;
  }

  .heart-side-img {
    width: clamp(90px, 35vw, 140px);
    height: clamp(90px, 35vw, 140px);
  }

  #cupid-flying-img {
    width: clamp(90px, 40vw, 150px);
  }

  #letter-envelope-img {
    width: clamp(110px, 55vw, 200px);
  }

  #cupid-letter-frame {
    width: 96vw;
    max-height: 80vh;
  }

  #cupid-letter-frame .letter-content {
    padding: 14px 12px 40px;
    /* thêm khoảng trống dưới cho màn rất nhỏ */
    max-height: 68vh;
    font-size: 0.9rem;
  }

  #cupid-letter-frame .cupid-frame-left {
    top: 30%;
    width: clamp(40px, 22vw, 70px);
  }

  #cupid-letter-frame .cupid-frame-right {
    top: 74%;
    width: clamp(45px, 26vw, 85px);
  }

  #cupid-in-space-boy,
  #cupid-in-space-girl {
    width: clamp(45px, 24vw, 80px);
  }
}

@media (hover: none) and (pointer: coarse) {
  #letter-envelope-img:hover {
    transform: translate(-50%, -50%) scale(1);
  }

  #letter-envelope-img:active {
    transform: translate(-50%, -50%) scale(1.05);
  }
}

/* Banner CHẾ ĐỘ DEMO - hiển thị trong không gian 3D, mờ mờ */
#scene3d-root .demo-mode-banner {
  position: absolute;
  background: transparent;
  color: rgba(255, 107, 107, 0.15);
  text-align: center;
  padding: 0;
  font-size: 120px;
  font-weight: 900;
  letter-spacing: 20px;
  text-transform: uppercase;
  z-index: -1;
  pointer-events: none;
  display: none;
  animation: demoBannerFadeIn 1s ease-out;
  text-shadow: none;
  font-family:
    "Inter",
    system-ui,
    -apple-system,
    sans-serif;
  white-space: nowrap;
  user-select: none;
}

/* Banner 1: Giữa màn hình */
#scene3d-root .demo-mode-banner.banner-center {
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-15deg);
}

/* Banner 2: Góc trên bên trái */
#scene3d-root .demo-mode-banner.banner-top-left {
  top: 15%;
  left: 10%;
  transform: translate(-50%, -50%) rotate(10deg);
}

/* Banner 3: Góc dưới bên phải */
#scene3d-root .demo-mode-banner.banner-bottom-right {
  top: 85%;
  left: 90%;
  transform: translate(-50%, -50%) rotate(-10deg);
}

#scene3d-root .demo-mode-banner.show {
  display: block;
}

@keyframes demoBannerFadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (max-width: 768px) {
  #scene3d-root .demo-mode-banner {
    font-size: 80px;
    letter-spacing: 12px;
  }

  /* Điều chỉnh vị trí trên mobile */
  #scene3d-root .demo-mode-banner.banner-top-left {
    top: 12%;
    left: 5%;
  }

  #scene3d-root .demo-mode-banner.banner-bottom-right {
    top: 88%;
    left: 95%;
  }
}

@media (max-width: 480px) {
  #scene3d-root .demo-mode-banner {
    font-size: 60px;
    letter-spacing: 8px;
  }

  /* Điều chỉnh vị trí trên mobile nhỏ */
  #scene3d-root .demo-mode-banner.banner-top-left {
    top: 10%;
    left: 3%;
  }

  #scene3d-root .demo-mode-banner.banner-bottom-right {
    top: 90%;
    left: 97%;
  }
}