:root {
  --paper: #f7efe3;
  --paper-deep: #efdfca;
  --ink: #5a3f39;
  --ink-strong: #3d2a2a;
  --accent: #df8f8a;
  --overlay: rgba(41, 26, 24, 0.58);
  --phase2-width: 100%;
  --phase2-left: 0%;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: "Manrope", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 18%, rgba(230, 184, 155, 0.22), transparent 40%),
    radial-gradient(circle at 88% 12%, rgba(230, 170, 154, 0.2), transparent 40%),
    linear-gradient(180deg, #f8f2ea 0%, #f2e7dc 100%);
  color: var(--ink-strong);
}

.app {
  width: 100%;
  min-height: 100%;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 1rem;
  padding: clamp(1rem, 3vw, 2.2rem);
}

.phase-board {
  position: relative;
  width: min(620px, 92vw);
  margin-inline: auto;
  aspect-ratio: 2 / 3;
  border-radius: 1.25rem;
  overflow: hidden;
  box-shadow:
    0 28px 45px rgba(57, 33, 27, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.phase-layer {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transform: scale(1.02);
  filter: blur(12px);
  transition: opacity 0.62s ease, filter 0.62s ease, transform 0.62s ease;
}

.phase-layer.is-active {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
  filter: blur(0);
}

.phase-board.is-transitioning .phase-layer {
  filter: blur(8px);
}

.phase-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
  display: block;
}

.phase-two-canvas {
  position: absolute;
  top: 0;
  left: var(--phase2-left);
  width: var(--phase2-width);
  height: 100%;
}

.mailbox-trigger {
  position: absolute;
  left: 20%;
  top: 36%;
  width: 36%;
  height: 36%;
  border: none;
  border-radius: 44% 44% 40% 40%;
  background: transparent;
  cursor: pointer;
}

.mailbox-trigger::before,
.mailbox-trigger::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  pointer-events: none;
}

.mailbox-trigger::before {
  inset: 8%;
  border: 2px dashed rgba(132, 86, 74, 0.34);
  opacity: 0;
  transition: opacity 0.2s ease;
}

.mailbox-trigger::after {
  inset: 24%;
  background: rgba(255, 159, 149, 0.24);
  animation: pulse 1.6s ease-in-out infinite;
}

.mailbox-trigger:hover::before,
.mailbox-trigger:focus-visible::before {
  opacity: 1;
}

.letter-hotspot {
  position: absolute;
  border: none;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  outline: none;
}

.letter-hotspot::after {
  content: "";
  position: absolute;
  inset: 6%;
  border-radius: inherit;
  border: 2px dashed rgba(81, 47, 47, 0.38);
  opacity: 0;
  transform: scale(0.94);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.letter-hotspot:hover::after,
.letter-hotspot:focus-visible::after {
  opacity: 1;
  transform: scale(1);
}

.hot-1 {
  left: 33%;
  top: 34%;
  width: 44%;
  height: 21%;
  transform: rotate(-8deg);
}

.phase-note {
  width: min(620px, 92vw);
  margin: 0 auto;
  min-height: 1.7rem;
  font-size: clamp(0.9rem, 2vw, 1rem);
  font-weight: 600;
  color: var(--ink);
  letter-spacing: 0.01em;
  text-align: center;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  background: var(--overlay);
  backdrop-filter: blur(8px);
  z-index: 12;
  padding: 1rem;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal-backdrop.is-open {
  opacity: 1;
}

.letter-modal {
  width: min(640px, 92vw);
  max-height: min(86vh, 860px);
  overflow: auto;
  border-radius: 1rem;
  border: 1px solid rgba(95, 66, 55, 0.25);
  padding: clamp(1rem, 2.4vw, 1.6rem);
  color: var(--ink-strong);
  background:
    linear-gradient(180deg, #fffaf3 0%, var(--paper) 45%, var(--paper-deep) 100%),
    radial-gradient(circle at 15% 12%, rgba(235, 208, 169, 0.2), transparent 40%);
  box-shadow: 0 22px 45px rgba(0, 0, 0, 0.28);
}

.modal-close {
  float: right;
  border: none;
  border-radius: 999px;
  padding: 0.46rem 0.76rem;
  background: #e5c8b4;
  color: #4f3332;
  font-weight: 700;
  cursor: pointer;
}

.modal-step {
  animation: modal-step-in 0.28s ease;
}

.modal-step[hidden] {
  display: none;
}

.modal-step-preview {
  display: grid;
  justify-items: center;
  gap: 0.7rem;
  padding-top: 0.4rem;
}

.modal-preview-note {
  margin: 0;
  color: #5f4640;
  font-size: 0.95rem;
  font-weight: 600;
}

.modal-letter-open {
  border: none;
  background: transparent;
  padding: 0;
  width: min(360px, 88%);
  cursor: pointer;
  border-radius: 0.8rem;
  transition: transform 0.2s ease, filter 0.2s ease;
}

.modal-letter-open:hover,
.modal-letter-open:focus-visible {
  transform: scale(1.02);
  filter: brightness(1.03);
}

.modal-letter-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 0.8rem;
  box-shadow: 0 14px 28px rgba(57, 30, 25, 0.28);
}

.modal-step-text {
  padding-top: 0.3rem;
  display: grid;
  gap: 0.6rem;
}

.modal-zoom-toolbar {
  display: flex;
  justify-content: flex-end;
  gap: 0.45rem;
}

.zoom-button {
  border: 1px solid rgba(95, 66, 55, 0.3);
  background: #f6e7d8;
  color: #4f3332;
  border-radius: 0.55rem;
  min-width: 2.2rem;
  height: 2rem;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.15s ease, filter 0.2s ease;
}

.zoom-button:hover,
.zoom-button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

.zoom-button:disabled {
  opacity: 0.46;
  cursor: not-allowed;
  transform: none;
}

.zoom-reset {
  min-width: 4.2rem;
  font-size: 0.85rem;
  letter-spacing: 0.01em;
}

.modal-content-viewport {
  width: 100%;
  max-height: min(68vh, 720px);
  overflow: auto;
  border-radius: 0.8rem;
  border: 1px solid rgba(95, 66, 55, 0.18);
  background: rgba(255, 250, 243, 0.82);
}

.modal-content-image {
  width: 100%;
  min-width: 100%;
  height: auto;
  display: block;
  border-radius: 0.8rem;
  box-shadow: 0 14px 28px rgba(57, 30, 25, 0.2);
  filter: brightness(1.1);
  transition: width 0.2s ease;
}

.download-button {
  justify-self: center;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 8rem;
  padding: 0.62rem 1rem;
  border-radius: 0.7rem;
  border: 1px solid rgba(95, 66, 55, 0.3);
  background: linear-gradient(180deg, #f8ead9 0%, #efd3b9 100%);
  color: #4a302e;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: transform 0.15s ease, filter 0.2s ease;
}

.download-button:hover,
.download-button:focus-visible {
  transform: translateY(-1px);
  filter: brightness(1.04);
}

@keyframes modal-step-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.95);
    opacity: 0.22;
  }

  50% {
    transform: scale(1.15);
    opacity: 0.42;
  }
}

@media (max-width: 640px) {
  .phase-board {
    width: min(520px, 92vw);
  }

  .phase-note {
    font-size: 0.9rem;
    text-align: center;
  }

  .letter-modal {
    max-height: 85vh;
  }
}