:root {
  --bg: #ffffff;
  --text: #1a1a1a;
  --subtext: #4d4d4d;
  --border: #e5e5e5;
  --shadow-heavy: 0 20px 48px rgba(0, 0, 0, 0.16);
  --overlay: rgba(0, 0, 0, 0.4);
  --accent: #0078d4;
  --modal-bg: #8e9499;
}

* {
  box-sizing: border-box;
}

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

body {
  background: var(--modal-bg);
  color: var(--text);
  font-family: "Noto Sans SC", "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  overflow: hidden;
}

body.phase-popups {
  background: linear-gradient(135deg, #f0f4f8 0%, #e8eef5 50%, #dfe7f0 100%);
}

#app {
  position: relative;
  width: 100%;
  height: 100%;
}

/* Phase 1: Modal */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--modal-bg);
  display: grid;
  place-items: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.5s ease;
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

.modal {
  width: min(92vw, 520px);
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow-heavy);
  text-align: left;
  overflow: hidden;
  animation: modal-appear 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.modal .titlebar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: #f3f3f3;
  border-bottom: 1px solid var(--border);
}

.modal .titlebar .icon {
  font-size: 18px;
}

.modal .titlebar .title {
  font-weight: 700;
}

.modal .content {
  padding: 16px 16px 8px;
  color: var(--subtext);
}

.modal .actions {
  padding: 0 16px 16px;
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  border-radius: 4px;
  border: 1px solid var(--border);
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.2px;
  background: #f7f7f7;
  font-family: inherit;
  font-size: 14px;
}

.btn.primary {
  background: var(--accent);
  color: #fff;
  border-color: #0a6ecf;
}

.btn:hover {
  filter: brightness(0.98);
}

.btn.primary:hover {
  filter: brightness(1.05);
}

.btn:active {
  transform: translateY(1px);
}

@keyframes modal-appear {
  0% {
    opacity: 0;
    transform: scale(0.7) translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Phase 2 & 4: Fullscreen scenes */
.scene {
  position: fixed;
  inset: 0;
  z-index: 8000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #1a1a1a;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease;
}

.scene.active {
  opacity: 1;
  pointer-events: auto;
}

.scene-img {
  width: 300px;
  height: auto;
  object-fit: contain;
  object-position: center;
}

.scene-finale {
  z-index: 9000;
}

#fireworks-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Phase 3: Popup layer */
#popup-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 8500;
  opacity: 0;
  transition: opacity 0.5s ease;
}

#popup-layer.active {
  opacity: 1;
}

#popup-layer.fade-out {
  opacity: 0;
}

.popup {
  position: absolute;
  width: 230px;
  color: var(--text);
  background: #ffffff;
  border-radius: 7px;
  border: 1px solid var(--border);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15), 0 8px 32px rgba(0, 0, 0, 0.08);
  font-size: 13px;
  line-height: 1.4;
  pointer-events: none;
  user-select: none;
  transform-origin: center;
  overflow: hidden;
  opacity: 0;
}

.popup .header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 8px;
  background: #f3f3f3;
  border-bottom: 1px solid var(--border);
}

.popup .header .icon {
  font-size: 12px;
}

.popup .header .title {
  font-weight: 800;
  font-size: 11px;
}

.popup .content {
  padding: 6px 10px;
  color: var(--text);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
}

.popup.theme-blue .header { background: #e3f2fd; border-bottom-color: #bbdefb; }
.popup.theme-blue .content { background: #f1f8ff; }
.popup.theme-green .header { background: #e8f5e9; border-bottom-color: #c8e6c9; }
.popup.theme-green .content { background: #f1f8f4; }
.popup.theme-orange .header { background: #fff3e0; border-bottom-color: #ffe0b2; }
.popup.theme-orange .content { background: #fffaf3; }
.popup.theme-purple .header { background: #f3e5f5; border-bottom-color: #e1bee7; }
.popup.theme-purple .content { background: #faf5fc; }
.popup.theme-pink .header { background: #fce4ec; border-bottom-color: #f8bbd0; }
.popup.theme-pink .content { background: #fff0f5; }
.popup.theme-yellow .header { background: #fffde7; border-bottom-color: #fff9c4; }
.popup.theme-yellow .content { background: #fffef7; }
.popup.theme-cyan .header { background: #e0f7fa; border-bottom-color: #b2ebf2; }
.popup.theme-cyan .content { background: #f0fcff; }
.popup.theme-lime .header { background: #f9fbe7; border-bottom-color: #f0f4c3; }
.popup.theme-lime .content { background: #fdfef8; }
.popup.theme-red .header { background: #ffebee; border-bottom-color: #ffcdd2; }
.popup.theme-red .content { background: #fff5f5; }
.popup.theme-teal .header { background: #e0f2f1; border-bottom-color: #b2dfdb; }
.popup.theme-teal .content { background: #f0faf9; }
.popup.theme-indigo .header { background: #e8eaf6; border-bottom-color: #c5cae9; }
.popup.theme-indigo .content { background: #f3f4fb; }
.popup.theme-amber .header { background: #fff8e1; border-bottom-color: #ffecb3; }
.popup.theme-amber .content { background: #fffef5; }
.popup.theme-rose .header { background: #fce4ec; border-bottom-color: #f8bbd0; }
.popup.theme-rose .content { background: #fef5f8; }
.popup.theme-mint .header { background: #e8f8f5; border-bottom-color: #c8ebe3; }
.popup.theme-mint .content { background: #f5fcfa; }
.popup.theme-peach .header { background: #fff0e5; border-bottom-color: #ffe0c7; }
.popup.theme-peach .content { background: #fffaf5; }
.popup.theme-lavender .header { background: #f0ebf8; border-bottom-color: #ddd0f0; }
.popup.theme-lavender .content { background: #f9f6fc; }
.popup.theme-coral .header { background: #ffe4e1; border-bottom-color: #ffc4bd; }
.popup.theme-coral .content { background: #fff7f6; }
.popup.theme-sky .header { background: #e1f5fe; border-bottom-color: #b3e5fc; }
.popup.theme-sky .content { background: #f0fbff; }
.popup.theme-lemon .header { background: #fffef0; border-bottom-color: #fff9c4; }
.popup.theme-lemon .content { background: #fffffa; }

@keyframes popup-from-top {
  0% { opacity: 0; transform: scale(0.3) translateY(-60px); }
  60% { opacity: 1; transform: scale(1.08) translateY(0); }
  80% { transform: scale(0.95) translateY(0); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes popup-from-bottom {
  0% { opacity: 0; transform: scale(0.3) translateY(60px); }
  60% { opacity: 1; transform: scale(1.08) translateY(0); }
  80% { transform: scale(0.95) translateY(0); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes popup-from-left {
  0% { opacity: 0; transform: scale(0.3) translateX(-60px); }
  60% { opacity: 1; transform: scale(1.08) translateX(0); }
  80% { transform: scale(0.95) translateX(0); }
  100% { opacity: 1; transform: scale(1) translateX(0); }
}

@keyframes popup-from-right {
  0% { opacity: 0; transform: scale(0.3) translateX(60px); }
  60% { opacity: 1; transform: scale(1.08) translateX(0); }
  80% { transform: scale(0.95) translateX(0); }
  100% { opacity: 1; transform: scale(1) translateX(0); }
}

@keyframes popup-from-topleft {
  0% { opacity: 0; transform: scale(0.3) translate(-50px, -50px); }
  60% { opacity: 1; transform: scale(1.08) translate(0, 0); }
  80% { transform: scale(0.95) translate(0, 0); }
  100% { opacity: 1; transform: scale(1) translate(0, 0); }
}

@keyframes popup-from-topright {
  0% { opacity: 0; transform: scale(0.3) translate(50px, -50px); }
  60% { opacity: 1; transform: scale(1.08) translate(0, 0); }
  80% { transform: scale(0.95) translate(0, 0); }
  100% { opacity: 1; transform: scale(1) translate(0, 0); }
}

@keyframes popup-from-bottomleft {
  0% { opacity: 0; transform: scale(0.3) translate(-50px, 50px); }
  60% { opacity: 1; transform: scale(1.08) translate(0, 0); }
  80% { transform: scale(0.95) translate(0, 0); }
  100% { opacity: 1; transform: scale(1) translate(0, 0); }
}

@keyframes popup-from-bottomright {
  0% { opacity: 0; transform: scale(0.3) translate(50px, 50px); }
  60% { opacity: 1; transform: scale(1.08) translate(0, 0); }
  80% { transform: scale(0.95) translate(0, 0); }
  100% { opacity: 1; transform: scale(1) translate(0, 0); }
}

.anim-top { animation: popup-from-top 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-bottom { animation: popup-from-bottom 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-left { animation: popup-from-left 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-right { animation: popup-from-right 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-topleft { animation: popup-from-topleft 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-topright { animation: popup-from-topright 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-bottomleft { animation: popup-from-bottomleft 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }
.anim-bottomright { animation: popup-from-bottomright 0.55s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; }

@media (max-width: 640px) {
  .popup {
    width: min(230px, 85vw);
    font-size: 13px;
  }

  .popup .content {
    font-size: 16px;
  }
}