:root {
  --bg: #fff7f2;
  --surface: #ffffff;
  --primary: #ff6b6b;
  --primary-strong: #e64f5f;
  --secondary: #7c5cff;
  --text: #1f2937;
  --muted: #6b7280;
  --accent: #ffd166;
  --mint: #6ee7b7;
  --line: #f3d8ce;
  --shadow: 0 18px 45px rgba(124, 92, 255, 0.14);
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at top left, rgba(255, 209, 102, 0.28), transparent 34rem),
    linear-gradient(180deg, var(--bg), #fffaf7 45%, var(--bg));
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  background: rgba(255, 247, 242, 0.86);
  border-bottom: 1px solid rgba(243, 216, 206, 0.8);
  backdrop-filter: blur(16px);
}

.brand,
.topnav,
.actions {
  display: flex;
  align-items: center;
}

.brand {
  gap: 0.6rem;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 2.25rem;
  height: 2.25rem;
  place-items: center;
  border-radius: 0.7rem;
  background: var(--primary);
  color: white;
  box-shadow: 0 10px 20px rgba(255, 107, 107, 0.26);
}

.topnav {
  gap: 0.25rem;
}

.topnav a {
  min-height: 2.5rem;
  padding: 0.65rem 0.8rem;
  border-radius: 0.8rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.topnav a:hover,
.topnav a:focus-visible {
  background: rgba(255, 255, 255, 0.82);
  color: var(--text);
  outline: none;
}

.screen {
  min-height: calc(100svh - 4.05rem);
  padding: clamp(2rem, 6vw, 5rem) clamp(1rem, 5vw, 4rem);
  scroll-margin-top: 4.5rem;
}

.hero-screen,
.play-layout,
.create-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
}

.hero-screen {
  align-items: center;
}

.compact-screen {
  display: grid;
  place-items: center;
}

.screen-copy,
.section-heading {
  max-width: 46rem;
}

.eyebrow {
  margin: 0 0 0.7rem;
  color: var(--secondary);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.05;
}

h1 {
  max-width: 13ch;
  font-size: clamp(3rem, 10vw, 6.6rem);
}

h2 {
  font-size: clamp(2.1rem, 7vw, 4.4rem);
}

h3 {
  font-size: clamp(1.35rem, 4vw, 2rem);
}

.lead {
  max-width: 38rem;
  margin: 1.2rem 0 0;
  color: var(--text);
  font-size: clamp(1.25rem, 3vw, 1.65rem);
  line-height: 1.45;
}

.support,
.section-heading p,
.panel p {
  color: var(--muted);
  line-height: 1.65;
}

.support {
  max-width: 34rem;
  margin: 0.8rem 0 0;
  font-size: 1.05rem;
}

.actions {
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.25rem;
  padding: 0.9rem 1.15rem;
  border-radius: 0.95rem;
  border: 0;
  font-weight: 900;
  box-shadow: 0 12px 25px rgba(31, 41, 55, 0.08);
  transition:
    background-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.button:active {
  transform: translateY(1px);
  box-shadow: 0 8px 18px rgba(31, 41, 55, 0.08);
}

.button.primary {
  background: var(--primary);
  color: white;
}

.button.primary:hover,
.button.primary:focus-visible {
  background: var(--primary-strong);
}

.button.secondary {
  background: white;
  color: var(--secondary);
}

.button.full {
  width: 100%;
}

.panel,
.sealed-card {
  border: 1px solid rgba(243, 216, 206, 0.9);
  border-radius: 1.4rem;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
}

.gift-stage {
  position: relative;
  min-height: 22rem;
  border-radius: 2rem;
  background:
    linear-gradient(135deg, rgba(124, 92, 255, 0.12), transparent 55%),
    linear-gradient(180deg, rgba(255, 209, 102, 0.42), rgba(255, 255, 255, 0.42));
  overflow: hidden;
}

.hero-puzzle {
  isolation: isolate;
  min-height: clamp(23rem, 58vw, 36rem);
  box-shadow: var(--shadow);
}

.hero-puzzle img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.hero-puzzle::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, transparent 55%, rgba(31, 41, 55, 0.18));
  pointer-events: none;
}

.puzzle-cutlines {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(90deg, transparent calc(33.333% - 1px), rgba(255, 255, 255, 0.88) 0 calc(33.333% + 1px), transparent 0),
    linear-gradient(90deg, transparent calc(66.666% - 1px), rgba(255, 255, 255, 0.88) 0 calc(66.666% + 1px), transparent 0),
    linear-gradient(180deg, transparent calc(33.333% - 1px), rgba(255, 255, 255, 0.88) 0 calc(33.333% + 1px), transparent 0),
    linear-gradient(180deg, transparent calc(66.666% - 1px), rgba(255, 255, 255, 0.88) 0 calc(66.666% + 1px), transparent 0);
  pointer-events: none;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.mini-grid {
  position: absolute;
  inset: auto 1.5rem 1.5rem;
  gap: 0.35rem;
}

.mini-grid span {
  border-radius: 0.45rem;
  background: linear-gradient(135deg, #fff1e8, #efeaff);
}

.mini-grid span {
  aspect-ratio: 1;
}

.section-heading {
  margin-bottom: 1.4rem;
}

.create-layout,
.play-layout {
  align-items: start;
}

.form-panel,
.mystery-note,
.status-panel,
.intro-card,
.reveal-card {
  padding: clamp(1.1rem, 4vw, 2rem);
}

.form-panel {
  display: grid;
  gap: 1rem;
}

label {
  display: grid;
  gap: 0.45rem;
  font-weight: 800;
}

input,
textarea,
select,
input[type="file"] {
  width: 100%;
  min-height: 3.2rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: #fffaf7;
  color: var(--text);
  font: inherit;
}

input,
textarea,
select {
  padding: 0.85rem 0.95rem;
}

input[type="file"] {
  display: block;
  padding: 0.75rem 0.85rem;
}

input[type="file"]::file-selector-button {
  min-height: 2.2rem;
  margin-right: 0.8rem;
  border: 0;
  border-radius: 0.7rem;
  background: var(--secondary);
  color: white;
  font: inherit;
  font-weight: 900;
  padding: 0.45rem 0.8rem;
}

textarea {
  resize: vertical;
}

.field-help,
.field-error,
.preview-meta {
  font-size: 0.92rem;
  line-height: 1.45;
}

.field-help,
.preview-meta {
  color: var(--muted);
}

.field-error {
  min-height: 1.35rem;
  color: #b42318;
}

.preview-card,
.share-card {
  display: grid;
  gap: 0.9rem;
  padding: 0.8rem;
  border: 1px solid rgba(255, 107, 107, 0.22);
  border-radius: 1rem;
  background: #fffaf7;
}

.preview-card {
  grid-template-columns: 5.75rem minmax(0, 1fr);
  align-items: center;
}

.share-card {
  grid-template-columns: minmax(0, 1fr);
}

.preview-frame {
  display: grid;
  width: 5.75rem;
  aspect-ratio: 1;
  place-items: center;
  overflow: hidden;
  border-radius: 0.85rem;
  background:
    linear-gradient(135deg, rgba(255, 209, 102, 0.28), rgba(124, 92, 255, 0.18)),
    #fff;
}

.preview-frame span {
  padding: 0.45rem;
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1.25;
  text-align: center;
}

.preview-frame img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.preview-label {
  margin: 0 0 0.25rem;
  color: var(--text);
  font-weight: 900;
}

.preview-meta {
  margin: 0;
}

.mystery-note ul {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
}

.mystery-note li,
.locked-list span {
  display: block;
  padding: 0.75rem 0.85rem;
  border-radius: 0.8rem;
  background: #fff7f2;
  color: var(--text);
  font-weight: 800;
}

.intro-card,
.reveal-card {
  width: min(100%, 34rem);
}

.sealed-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.55rem;
  margin: 1.4rem 0;
}

.sealed-strip span {
  min-height: 4.8rem;
  border-radius: 0.9rem;
  background:
    linear-gradient(135deg, rgba(255, 107, 107, 0.16), rgba(124, 92, 255, 0.18)),
    repeating-linear-gradient(45deg, transparent 0 0.8rem, rgba(255, 255, 255, 0.7) 0.8rem 1.1rem);
}

.puzzle-placeholder {
  display: grid;
  grid-template-columns: repeat(var(--grid-size, 3), 1fr);
  width: min(100%, 34rem, calc(100svw - 2rem));
  aspect-ratio: 1;
  gap: 0.55rem;
  padding: 0.6rem;
  border-radius: 1.6rem;
  background: white;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.puzzle-tile {
  min-width: 0;
  min-height: 0;
  padding: 0;
  border: 0;
  border-radius: 0.45rem;
  appearance: none;
  background-repeat: no-repeat;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.72);
  cursor: pointer;
  touch-action: manipulation;
  transition:
    box-shadow 140ms ease,
    outline-color 140ms ease,
    transform 140ms ease;
}

.puzzle-tile:active {
  transform: scale(0.985);
}

.puzzle-tile:focus-visible,
.puzzle-tile.is-selected {
  outline: 0.22rem solid var(--secondary);
  outline-offset: 0.12rem;
}

.puzzle-tile.is-selected {
  box-shadow:
    inset 0 0 0 0.18rem rgba(255, 255, 255, 0.95),
    0 0 0 0.22rem rgba(124, 92, 255, 0.22);
}

.puzzle-tile:disabled {
  cursor: default;
}

.puzzle-empty {
  align-self: center;
  justify-self: center;
  max-width: 16rem;
  margin: 0;
  color: var(--muted);
  font-weight: 900;
  text-align: center;
}

.status-panel {
  width: min(100%, 28rem);
}

.locked-list {
  display: grid;
  gap: 0.65rem;
  margin: 1rem 0 1.2rem;
}

.reveal-placeholder {
  display: grid;
  min-height: 12rem;
  margin: 1.4rem 0 1rem;
  place-items: center;
  border-radius: 1.1rem;
  background:
    linear-gradient(135deg, rgba(255, 209, 102, 0.34), rgba(110, 231, 183, 0.24)),
    #fffaf7;
  color: var(--text);
  font-weight: 900;
}

.reveal-image-frame {
  width: 100%;
  margin: 1.4rem 0 1rem;
  aspect-ratio: 1;
  overflow: hidden;
  border-radius: 1.1rem;
  background: #fffaf7;
  border: 1px solid var(--line);
  box-shadow: 0 14px 30px rgba(255, 107, 107, 0.13);
}

.reveal-image-frame img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.reveal-content {
  display: grid;
  gap: 0.65rem;
  margin-bottom: 1rem;
  animation: reveal-in 280ms ease both;
}

.reveal-text {
  margin: 0 0 0.45rem;
  padding: 0.9rem 1rem;
  border-radius: 0.9rem;
  background: #fff7f2;
  color: var(--text);
  font-weight: 800;
  line-height: 1.55;
}

@keyframes reveal-in {
  from {
    opacity: 0;
    transform: translateY(0.4rem);
  }

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

@media (min-width: 760px) {
  .hero-screen,
  .create-layout,
  .play-layout {
    grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.78fr);
  }

  .gift-stage {
    min-height: 32rem;
  }
}

@media (max-width: 560px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topnav {
    width: 100%;
    justify-content: space-between;
  }

  .topnav a {
    flex: 1;
    text-align: center;
  }

  .button {
    width: 100%;
  }

  .screen {
    min-height: auto;
    padding-top: 2rem;
    padding-bottom: 2.5rem;
  }

  .section-heading {
    margin-bottom: 1rem;
  }

  .play-layout {
    gap: 1rem;
  }

  .puzzle-placeholder {
    gap: 0.38rem;
    padding: 0.45rem;
    border-radius: 1.15rem;
  }

  .puzzle-tile {
    border-radius: 0.34rem;
  }

  .status-panel {
    width: 100%;
  }

  .reveal-card {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}