* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
}

body {
  min-height: 100vh;
  color: #efe8d6;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  background:
    linear-gradient(180deg, rgba(201, 164, 92, 0.08), transparent 28%),
    repeating-linear-gradient(45deg, rgba(255, 255, 255, 0.016) 0 2px, transparent 2px 9px),
    #16231e;
}

button {
  font: inherit;
}

.theme-toggle {
  position: fixed;
  top: 16px;
  right: 18px;
  z-index: 50;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(201, 164, 92, 0.55);
  border-radius: 50%;
  background: rgba(29, 43, 37, 0.88);
  color: #d9b56e;
  display: grid;
  place-items: center;
  cursor: pointer;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

html[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

html[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

html[data-theme="light"] .theme-toggle .icon-sun {
  display: none;
}

html[data-theme="light"] .theme-toggle .icon-moon {
  display: block;
}

.app {
  width: 100%;
  max-width: 1080px;
  margin-left: auto;
  margin-right: auto;
  padding: 26px 20px 72px;
}

.masthead {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-bottom: 40px;
}

.brand-mark {
  width: 46px;
  height: 46px;
  border: 1px solid rgba(201, 164, 92, 0.75);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #c9a45c;
  background: rgba(201, 164, 92, 0.06);
}

.brand-text h1 {
  margin: 0;
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: 22px;
  letter-spacing: 4px;
  color: #f4ecd8;
}

.brand-text p {
  margin: 4px 0 0;
  font-size: 12px;
  letter-spacing: 2px;
  color: #b9a877;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

#theme-screen.active {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.step-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

#theme-screen.active .step-row {
  justify-content: center;
}

.step-index {
  width: 34px;
  height: 34px;
  border: 1px solid #c9a45c;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #c9a45c;
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: 14px;
}

.step-name {
  color: #b9a877;
  font-size: 14px;
  letter-spacing: 4px;
}

.screen-title {
  margin: 0 0 28px;
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: 28px;
  font-weight: 600;
  letter-spacing: 2px;
  color: #f7f0df;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  width: 100%;
  max-width: 760px;
}

.theme-card {
  min-height: 132px;
  border: 1px solid rgba(201, 164, 92, 0.32);
  border-radius: 8px;
  background: #1d2b25;
  color: #f1ead8;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: border-color 0.18s ease, transform 0.18s ease, background 0.18s ease;
}

.theme-card:hover {
  border-color: var(--accent);
  background: #22322b;
  transform: translateY(-2px);
}

.theme-icon {
  width: 44px;
  height: 44px;
  border: 1px solid var(--accent);
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: var(--accent);
}

.theme-svg {
  width: 22px;
  height: 22px;
}

.theme-name {
  font-size: 17px;
  letter-spacing: 6px;
}

.reading-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 30px;
}

.text-button {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 4px;
  border: 0;
  background: none;
  color: #d4c08f;
  font-size: 14px;
  cursor: pointer;
}

.text-button svg {
  width: 16px;
  height: 16px;
}

.text-button:hover {
  color: #f1e4b8;
}

.theme-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid rgba(201, 164, 92, 0.4);
  border-radius: 999px;
  background: #1d2b25;
  font-size: 15px;
  letter-spacing: 2px;
}

.banner-icon {
  display: grid;
  place-items: center;
}

.banner-icon svg {
  width: 20px;
  height: 20px;
}

.context-box {
  max-width: 820px;
  margin: 0 auto 24px;
}

.context-box label {
  display: block;
  margin-bottom: 8px;
  color: #b9a877;
  font-size: 13px;
  letter-spacing: 2px;
}

.context-box textarea {
  width: 100%;
  min-height: 64px;
  padding: 12px 14px;
  border: 1px solid rgba(201, 164, 92, 0.4);
  border-radius: 8px;
  background: #1d2b25;
  color: #efe8d6;
  font: inherit;
  font-size: 14px;
  line-height: 1.6;
  outline: none;
  resize: vertical;
}

.context-box textarea:focus {
  border-color: #c9a45c;
}

.context-box textarea::placeholder {
  color: #8d7d5b;
}

.cards-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 820px;
  margin: 0 auto;
}

.slot {
  display: flex;
  flex-direction: column;
}

.slot-head {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-bottom: 12px;
  color: #b9a877;
  font-size: 13px;
  letter-spacing: 2px;
}

.slot-number {
  width: 26px;
  height: 26px;
  border: 1px solid rgba(201, 164, 92, 0.5);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 11px;
}

.slot-name {
  letter-spacing: 3px;
}

.card {
  position: relative;
  width: 100%;
  max-width: 190px;
  aspect-ratio: 3 / 5;
  margin: 0 auto 14px;
  border-radius: 10px;
  perspective: 900px;
  cursor: default;
}

.card.ready {
  cursor: pointer;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}

.card.flipped .card-inner {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  border-radius: 10px;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.32);
}

.card-face svg {
  display: block;
  width: 100%;
  height: 100%;
}

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

.card-front {
  transform: rotateY(180deg);
  background: #f7f0df;
}

.card.reversed .card-front {
  transform: rotateY(180deg) rotate(180deg);
}

.card.pending {
  opacity: 0.3;
}

.card.drawing .card-back {
  animation: card-pulse 0.28s ease-in-out infinite alternate;
}

@keyframes card-pulse {
  from {
    transform: translateY(0) rotate(-1deg);
  }
  to {
    transform: translateY(-6px) rotate(1deg);
  }
}

.reading-panel {
  min-height: 270px;
  padding: 16px 16px 18px;
  border-radius: 8px;
  background: #f2e9d4;
  color: #322b1f;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.18);
  display: flex;
  flex-direction: column;
  flex: 1 1 auto;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.orientation {
  padding: 3px 9px;
  border-radius: 999px;
  font-size: 12px;
  letter-spacing: 1px;
}

.orientation.good {
  background: #dce8d4;
  color: #3d5c33;
}

.orientation.bad {
  background: #ead6d0;
  color: #8d3f33;
}

.panel-pos {
  color: #8a7a5d;
  font-size: 12px;
  letter-spacing: 2px;
}

.reading-panel h3 {
  margin: 0 0 8px;
  font-family: "Noto Serif SC", "Songti SC", SimSun, serif;
  font-size: 22px;
  letter-spacing: 3px;
  color: #2e281b;
}

.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.keywords span {
  padding: 2px 8px;
  border: 1px solid #cbb98e;
  border-radius: 999px;
  color: #6f5f3d;
  font-size: 11px;
}

.panel-main {
  margin: 0 0 12px;
  color: #3c3425;
  font-size: 14px;
  line-height: 1.75;
  flex: 1 0 auto;
}

.panel-theme {
  margin: 0;
  color: #715f3e;
  font-size: 13px;
  line-height: 1.7;
  overflow-wrap: anywhere;
}

.panel-divider {
  border-top: 1px solid #d6c9a5;
  margin: 0 0 10px;
}

.draw-area {
  display: flex;
  justify-content: center;
  margin-top: 34px;
}

.primary-button {
  padding: 14px 34px;
  border: 0;
  border-radius: 8px;
  background: #c9a45c;
  color: #241e13;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 3px;
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(201, 164, 92, 0.18);
  transition: background 0.18s ease, transform 0.18s ease;
}

.primary-button:hover:not(:disabled) {
  background: #d9b56e;
  transform: translateY(-2px);
}

.primary-button:disabled {
  opacity: 0.55;
  cursor: wait;
}

.overall {
  width: 100%;
  max-width: 820px;
  margin-top: 36px;
  margin-left: auto;
  margin-right: auto;
  padding: 24px 26px;
  border: 1px solid rgba(201, 164, 92, 0.55);
  border-radius: 8px;
  background: #1d2b25;
}

.overall-label {
  display: inline-block;
  margin-bottom: 16px;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(201, 164, 92, 0.5);
  color: #c9a45c;
  font-size: 13px;
  letter-spacing: 4px;
}

.overall p {
  margin: 0 0 12px;
  color: #e7ddc3;
  font-size: 15px;
  line-height: 1.9;
}

.overall p:last-child {
  margin-bottom: 0;
}

.overall-head {
  margin: 0 0 12px;
  font-size: 17px;
  line-height: 1.8;
}

.ai-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.ai-result {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 22px 24px;
  border: 1px solid rgba(201, 164, 92, 0.55);
  border-radius: 8px;
  background: #1d2b25;
}

.ai-label {
  margin-bottom: 12px;
  color: #c9a45c;
  font-size: 13px;
  letter-spacing: 4px;
}

.ai-result p {
  margin: 0;
  color: #e7ddc3;
  font-size: 15px;
  line-height: 1.9;
  white-space: pre-wrap;
}

.ai-result.is-error p {
  color: #e2b0a6;
}

.attribution {
  margin-top: 42px;
  color: #9d8f6f;
  font-size: 12px;
  letter-spacing: 1px;
  text-align: center;
}

html[data-theme="light"] body {
  color: #3f382a;
  background:
    linear-gradient(180deg, rgba(140, 105, 45, 0.1), transparent 28%),
    repeating-linear-gradient(45deg, rgba(90, 65, 25, 0.03) 0 2px, transparent 2px 9px),
    #f4ecd9;
}

html[data-theme="light"] .theme-toggle {
  border-color: rgba(140, 105, 45, 0.55);
  background: rgba(255, 250, 240, 0.92);
  color: #8a6a1f;
  box-shadow: 0 6px 16px rgba(90, 70, 30, 0.16);
}

html[data-theme="light"] .brand-mark {
  border-color: rgba(140, 105, 45, 0.65);
  background: rgba(140, 105, 45, 0.08);
  color: #8a6a1f;
}

html[data-theme="light"] .brand-text h1,
html[data-theme="light"] .screen-title {
  color: #3f382a;
}

html[data-theme="light"] .brand-text p,
html[data-theme="light"] .step-name,
html[data-theme="light"] .slot-head,
html[data-theme="light"] .attribution {
  color: #7a6a4a;
}

html[data-theme="light"] .step-index {
  border-color: #9a7420;
  color: #9a7420;
}

html[data-theme="light"] .theme-card {
  border-color: rgba(120, 90, 30, 0.35);
  background: #fffaf0;
  color: #4a3d28;
}

html[data-theme="light"] .theme-card:hover {
  border-color: var(--accent);
  background: #fff2d8;
}

html[data-theme="light"] .text-button {
  color: #8a6a1f;
}

html[data-theme="light"] .theme-banner {
  border-color: rgba(140, 105, 45, 0.45);
  background: #fffaf0;
}

html[data-theme="light"] .slot-number {
  border-color: rgba(120, 90, 30, 0.5);
  color: #7a6a4a;
}

html[data-theme="light"] .reading-panel {
  background: #fffaf1;
  box-shadow: 0 10px 22px rgba(90, 70, 30, 0.12);
}

html[data-theme="light"] .overall {
  border-color: rgba(140, 105, 45, 0.5);
  background: #fffaf1;
}

html[data-theme="light"] .overall p {
  color: #4a3d28;
}

html[data-theme="light"] .overall-head {
  color: #3f382a;
}

html[data-theme="light"] .context-box label {
  color: #7a6a4a;
}

html[data-theme="light"] .context-box textarea {
  border-color: rgba(120, 90, 30, 0.35);
  background: #fffaf0;
  color: #3f382a;
}

html[data-theme="light"] .context-box textarea::placeholder {
  color: #a08c67;
}

html[data-theme="light"] .ai-result {
  border-color: rgba(140, 105, 45, 0.5);
  background: #fffaf1;
}

html[data-theme="light"] .ai-result p {
  color: #4a3d28;
}

@media (max-width: 760px) {
  .theme-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .screen-title {
    font-size: 24px;
  }

  .cards-row {
    gap: 12px;
  }

  .context-box textarea {
    font-size: 13px;
  }

  .ai-result {
    padding: 18px;
  }

  .reading-panel {
    min-height: 220px;
    padding: 13px;
  }

  .reading-panel h3 {
    font-size: 19px;
  }

  .panel-main {
    font-size: 13px;
  }

}

@media (max-width: 520px) {
  .app {
    padding: 20px 14px 56px;
  }

  .masthead {
    margin-bottom: 28px;
  }

  .screen-title {
    font-size: 22px;
  }

  .theme-card {
    min-height: 112px;
  }

  .theme-name {
    font-size: 15px;
    letter-spacing: 4px;
  }

  .reading-top {
    align-items: flex-start;
    flex-direction: column;
    margin-bottom: 22px;
  }

  .theme-banner {
    align-self: flex-end;
    padding: 7px 12px;
    font-size: 13px;
  }

  .context-box {
    margin-bottom: 18px;
  }

  .context-box textarea {
    min-height: 56px;
    padding: 10px 12px;
  }

  .cards-row {
    gap: 8px;
  }

  .card {
    max-width: none;
  }

  .slot-head {
    gap: 5px;
    margin-bottom: 8px;
    font-size: 11px;
  }

  .slot-number {
    width: 22px;
    height: 22px;
    font-size: 10px;
  }

  .reading-panel {
    min-height: 180px;
    padding: 11px;
  }

  .reading-panel h3 {
    font-size: 16px;
  }

  .keywords span {
    font-size: 10px;
  }

  .panel-main,
  .panel-theme {
    font-size: 12px;
  }

  .panel-main {
    line-height: 1.65;
  }

  .draw-area {
    margin-top: 26px;
  }

  .primary-button {
    width: 100%;
    max-width: 320px;
  }

  .overall {
    padding: 18px;
  }

  .ai-result {
    padding: 16px;
  }

  .overall p,
  .overall-head {
    font-size: 14px;
  }
}