:root {
  color-scheme: light;
  --ink: #21352d;
  --muted: #64746d;
  --cream: #f7f3ea;
  --paper: #fffdf8;
  --green: #17624a;
  --green-dark: #0f4937;
  --green-soft: #dfece5;
  --gold: #e8a936;
  --line: #dedfd8;
  --shadow: 0 18px 48px rgba(33, 53, 45, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--cream);
  font-family:
    "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  color: var(--ink);
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  min-height: 100dvh;
  background:
    radial-gradient(circle at 85% 0%, rgba(232, 169, 54, 0.14), transparent 32rem),
    var(--cream);
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 4px solid #f0b84d;
  outline-offset: 4px;
}

[hidden] {
  display: none !important;
}

.app-shell {
  width: min(100%, 1120px);
  min-height: 100vh;
  margin: 0 auto;
  padding: 0 clamp(18px, 4vw, 52px);
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  border-bottom: 1px solid rgba(33, 53, 45, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-size: 23px;
  font-weight: 800;
  cursor: pointer;
}

.brand-mark {
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  border-radius: 15px;
  background: #f6c866;
  color: #7b4c00;
  font-size: 28px;
  box-shadow: inset 0 -3px 0 rgba(123, 76, 0, 0.12);
}

.step-label {
  padding: 9px 15px;
  border-radius: 999px;
  background: var(--green-soft);
  color: var(--green-dark);
  font-size: 16px;
  font-weight: 700;
}

.screen {
  padding: clamp(42px, 8vw, 72px) 0 56px;
}

.intro {
  max-width: 620px;
  margin-bottom: 34px;
}

.intro.compact {
  margin-top: 42px;
}

.eyebrow {
  margin: 0 0 9px;
  color: var(--green);
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

h1 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(36px, 6vw, 56px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.intro > p:last-child {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 21px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  position: relative;
  min-height: 210px;
  overflow: hidden;
  padding: 0;
  border: 0;
  border-radius: 24px;
  background: #cad8d0;
  box-shadow: 0 8px 22px rgba(33, 53, 45, 0.1);
  cursor: pointer;
  isolation: isolate;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.category-card::after {
  position: absolute;
  inset: 35% 0 0;
  z-index: 1;
  background: linear-gradient(transparent, rgba(8, 25, 18, 0.84));
  content: "";
}

.category-card img {
  width: 100%;
  height: 100%;
  min-height: 210px;
  object-fit: cover;
  transition: transform 300ms ease;
}

.category-card strong {
  position: absolute;
  right: 18px;
  bottom: 17px;
  left: 18px;
  z-index: 2;
  color: white;
  font-size: 26px;
  text-align: left;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.45);
}

.category-card:hover,
.category-card:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.category-card:hover img {
  transform: scale(1.035);
}

.back-button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  gap: 8px;
  padding: 10px 17px;
  border: 1px solid var(--line);
  border-radius: 15px;
  background: var(--paper);
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
}

.greeting-options {
  display: grid;
  max-width: 760px;
  gap: 20px;
}

.greeting-card {
  display: grid;
  min-height: 130px;
  grid-template-columns: 78px 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 22px 26px;
  border: 2px solid transparent;
  border-radius: 26px;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
}

.greeting-card.morning {
  background: #fff1c9;
  border-color: #f1d388;
}

.greeting-card.afternoon {
  background: #dfeeea;
  border-color: #b9d7cf;
}

.greeting-card:hover,
.greeting-card:focus-visible {
  transform: translateX(5px);
  box-shadow: var(--shadow);
}

.greeting-icon {
  font-size: 54px;
}

.greeting-copy {
  display: grid;
  gap: 5px;
}

.greeting-copy strong {
  font-size: 34px;
}

.greeting-copy small {
  color: var(--muted);
  font-size: 18px;
}

.arrow {
  font-size: 54px;
  font-weight: 300;
}

.result-screen {
  max-width: 900px;
  margin: 0 auto;
}

.result-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin: 38px 0 24px;
}

.result-heading h1 {
  font-size: clamp(34px, 5vw, 48px);
}

.preview-card {
  position: relative;
  overflow: hidden;
  width: min(100%, 680px);
  aspect-ratio: 1;
  margin: 0 auto;
  border: 10px solid var(--paper);
  border-radius: 30px;
  background: #dbe4df;
  box-shadow: var(--shadow);
}

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

.loading-state {
  display: flex;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  background: linear-gradient(145deg, #e2ede7, #fff2cc);
  color: var(--ink);
  font-size: 18px;
}

.loading-state strong {
  margin-top: 7px;
  font-size: 23px;
}

.sun-spinner {
  display: block;
  color: var(--gold);
  font-size: 62px;
  animation: pulse 1.1s ease-in-out infinite;
}

@keyframes pulse {
  50% {
    transform: scale(1.12) rotate(12deg);
  }
}

.action-panel {
  width: min(100%, 680px);
  margin: 24px auto 0;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  min-height: 60px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-radius: 17px;
  font-size: 21px;
  font-weight: 800;
  cursor: pointer;
}

.primary-button {
  width: 100%;
  min-height: 70px;
  border: 0;
  background: var(--green);
  color: white;
  box-shadow: 0 10px 22px rgba(23, 98, 74, 0.22);
}

.primary-button:hover {
  background: var(--green-dark);
}

.secondary-button {
  padding: 12px 20px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
}

button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.secondary-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 14px;
}

.save-hint {
  margin: 12px 4px 0;
  color: var(--muted);
  font-size: 16px;
  font-weight: 700;
  text-align: right;
}

.desktop-refresh {
  flex: 0 0 auto;
}

#mobileNewImageButton {
  display: none;
}

.photo-info {
  width: min(100%, 680px);
  margin: 22px auto 0;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(255, 253, 248, 0.72);
  color: var(--muted);
  font-size: 16px;
}

.photo-info summary {
  color: var(--ink);
  font-weight: 700;
  cursor: pointer;
}

.photo-info p {
  margin-bottom: 7px;
}

.photo-info a,
footer a {
  color: var(--green);
  font-weight: 700;
}

footer {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(33, 53, 45, 0.12);
  color: var(--muted);
  font-size: 15px;
}

.toast {
  position: fixed;
  bottom: calc(22px + env(safe-area-inset-bottom));
  left: 50%;
  z-index: 10;
  max-width: calc(100% - 36px);
  padding: 15px 22px;
  transform: translateX(-50%);
  border-radius: 15px;
  background: #20362d;
  box-shadow: var(--shadow);
  color: white;
  font-size: 18px;
  font-weight: 700;
  text-align: center;
}

@media (max-width: 800px) {
  .category-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .category-card,
  .category-card img {
    min-height: 190px;
  }
}

@media (max-width: 560px) {
  .app-shell {
    padding: 0 16px;
  }

  .app-header {
    min-height: 74px;
  }

  .brand {
    gap: 9px;
    font-size: 20px;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 13px;
    font-size: 24px;
  }

  .step-label {
    padding: 8px 11px;
    font-size: 14px;
  }

  .screen {
    padding: 34px 0 44px;
  }

  .intro {
    margin-bottom: 26px;
  }

  h1 {
    font-size: 39px;
  }

  .intro > p:last-child {
    font-size: 19px;
  }

  .category-grid {
    gap: 12px;
  }

  .category-card,
  .category-card img {
    min-height: 154px;
  }

  .category-card {
    border-radius: 19px;
  }

  .category-card strong {
    right: 14px;
    bottom: 13px;
    left: 14px;
    font-size: 23px;
  }

  .intro.compact {
    margin-top: 32px;
  }

  .greeting-card {
    min-height: 116px;
    grid-template-columns: 60px 1fr auto;
    gap: 13px;
    padding: 18px;
  }

  .greeting-icon {
    font-size: 45px;
  }

  .greeting-copy strong {
    font-size: 30px;
  }

  .greeting-copy small {
    font-size: 16px;
  }

  .result-heading {
    margin-top: 30px;
  }

  .desktop-refresh {
    display: none;
  }

  #mobileNewImageButton {
    display: inline-flex;
  }

  .preview-card {
    border-width: 6px;
    border-radius: 22px;
  }

  .primary-button {
    min-height: 68px;
  }

  .secondary-button {
    min-height: 58px;
    padding: 10px 12px;
    font-size: 18px;
  }

  .save-hint {
    text-align: center;
  }

  footer {
    align-items: flex-start;
    justify-content: center;
    flex-direction: column;
    padding: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}