:root {
  color-scheme: light;
  --bg: #f2ede4;
  --surface: rgba(255, 252, 247, 0.96);
  --surface-soft: #f6f1e7;
  --surface-strong: #fbf8f2;
  --text: #181611;
  --muted: #6d6457;
  --line: rgba(57, 43, 28, 0.12);
  --brand: #155843;
  --brand-strong: #103d2f;
  --accent: #b98138;
  --danger: #b13e34;
  --shadow: 0 18px 48px rgba(54, 40, 25, 0.08);
  --radius-xl: 30px;
  --radius-lg: 22px;
  --radius-md: 16px;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(21, 88, 67, 0.08), transparent 24%),
    radial-gradient(circle at top right, rgba(185, 129, 56, 0.07), transparent 22%),
    linear-gradient(180deg, #f7f2e9 0%, var(--bg) 100%);
}

button,
input,
select,
textarea,
video {
  font: inherit;
}

button:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

a {
  color: inherit;
}

.page-shell {
  width: min(1280px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 64px;
}

.topbar,
.panel,
.session-panel,
.template-card,
.reference-meta-card,
.status-card,
.history-card,
.result-meta div,
.context-card,
.spec-card {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.topbar {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 18px;
  padding: 24px 26px;
  border-radius: var(--radius-xl);
}

.eyebrow,
.section-label,
.switch-label,
.context-label {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.brand-block h1,
.panel h2,
.reference-head h3 {
  margin: 0;
}

.brand-block h1 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.subcopy {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
  max-width: 720px;
}

.session-panel {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: center;
  padding: 16px;
  border-radius: var(--radius-lg);
}

.session-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.session-item strong {
  display: block;
  margin-top: 6px;
  font-size: 24px;
}

.session-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 10px;
}

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(380px, 0.96fr);
  gap: 24px;
  margin-top: 24px;
}

.panel {
  padding: 24px;
  border-radius: var(--radius-xl);
}

.panel-heading,
.reference-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.panel h2 {
  font-size: clamp(28px, 3vw, 38px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.switch-stack {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.switch-group {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 20px;
  background: rgba(255, 250, 244, 0.85);
  border: 1px solid rgba(21, 88, 67, 0.08);
}

.switch-label {
  margin: 0;
}

.mode-switch {
  display: inline-flex;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: #edf4ef;
}

.mode-pill,
.primary-button,
.secondary-button,
.upload-button,
.preset-chip,
.reference-remove {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.mode-pill {
  padding: 10px 16px;
  background: transparent;
  color: var(--brand-strong);
  font-weight: 700;
}

.mode-pill.is-active {
  background: #fff;
  box-shadow: 0 8px 20px rgba(24, 39, 32, 0.08);
}

.context-bar {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.context-card,
.spec-card {
  padding: 16px;
  border-radius: 18px;
}

.context-card strong,
.spec-card strong {
  display: block;
  font-size: 15px;
  line-height: 1.6;
}

.context-card .context-label,
.spec-card .context-label {
  margin-bottom: 8px;
}

.input-helper,
.field-note,
.submit-tip {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.78;
}

.input-helper {
  margin-top: 20px;
}

.preset-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.preset-chip {
  min-height: 38px;
  padding: 0 14px;
  background: var(--surface-soft);
  color: var(--brand-strong);
  border: 1px solid rgba(21, 88, 67, 0.08);
  font-weight: 700;
}

.template-grid {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.template-grid.compact {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.template-card {
  padding: 16px;
  border-radius: 18px;
  cursor: pointer;
}

.template-card.active {
  border-color: rgba(21, 88, 67, 0.24);
  background: #eef7f1;
}

.template-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
}

.template-card p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.68;
}

.field {
  display: block;
  margin-top: 18px;
}

.field span {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 800;
}

.field textarea,
.field select {
  width: 100%;
  padding: 14px 15px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  outline: none;
}

.field textarea:focus,
.field select:focus {
  border-color: rgba(21, 88, 67, 0.28);
  box-shadow: 0 0 0 4px rgba(21, 88, 67, 0.08);
}

.field-prompt textarea {
  min-height: 170px;
  resize: vertical;
  line-height: 1.8;
}

.field-note {
  margin-top: 10px;
}

.settings-panel {
  margin-top: 6px;
}

.field-grid,
.video-spec-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.reference-box {
  margin-top: 20px;
  padding: 18px;
  border-radius: 22px;
  border: 1px dashed rgba(21, 88, 67, 0.24);
  background: linear-gradient(180deg, #f8fbf9 0%, #f4faf6 100%);
}

.upload-button,
.secondary-button,
.primary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 16px;
  text-decoration: none;
}

.upload-button,
.secondary-button {
  background: var(--surface-soft);
  color: var(--text);
}

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

.primary-button {
  min-width: 148px;
  background: linear-gradient(135deg, var(--brand), #237055);
  color: #fff;
  font-weight: 800;
}

.reference-preview {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 16px;
  margin-top: 16px;
}

.reference-meta-card {
  padding: 16px;
  border-radius: 18px;
}

.reference-status,
.reference-asset {
  margin: 0;
}

.reference-status {
  font-weight: 800;
}

.reference-asset {
  margin-top: 10px;
  color: var(--muted);
  line-height: 1.7;
  word-break: break-all;
}

.reference-meta-card .secondary-button {
  margin-top: 16px;
}

.reference-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  align-content: start;
}

.reference-thumb {
  position: relative;
  overflow: hidden;
  border-radius: 18px;
  border: 1px solid rgba(21, 88, 67, 0.12);
  background: #ece5d8;
}

.reference-thumb img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.reference-thumb-info {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  padding: 10px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  background: linear-gradient(180deg, rgba(16, 61, 47, 0) 0%, rgba(16, 61, 47, 0.82) 100%);
}

.reference-thumb-name {
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.4;
  word-break: break-all;
}

.reference-remove {
  min-width: 34px;
  min-height: 34px;
  padding: 0 10px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--danger);
  font-weight: 800;
}

.submit-box {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 22px;
}

.status-card {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: 18px;
}

.status-label {
  margin: 0 0 8px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 800;
}

.status-card p:last-child {
  margin: 0;
}

.result-stage {
  margin-top: 18px;
  min-height: 460px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #fff 0%, #f4eee4 100%);
}

.result-stage.empty {
  display: grid;
  place-items: center;
  padding: 28px;
}

.result-placeholder {
  text-align: center;
  max-width: 320px;
}

.result-placeholder h3 {
  margin: 0 0 10px;
  font-size: 24px;
}

.result-placeholder p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

#resultImage,
#resultVideo {
  width: 100%;
  max-height: 760px;
  display: block;
  object-fit: cover;
  background: #ece5d8;
}

#resultVideo {
  aspect-ratio: 3 / 2;
  object-fit: contain;
  background: #151515;
}

.result-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.result-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0 0;
}

.result-meta div {
  padding: 13px 14px;
  border-radius: 16px;
}

.result-meta dt {
  font-size: 12px;
  color: var(--muted);
}

.result-meta dd {
  margin: 8px 0 0;
  font-size: 14px;
  font-weight: 800;
}

.error-banner {
  margin: 16px 0 0;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(177, 62, 52, 0.08);
  border: 1px solid rgba(177, 62, 52, 0.14);
  color: var(--danger);
}

.history-panel {
  margin-top: 24px;
}

.history-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.history-card {
  padding: 12px;
  border-radius: 20px;
  cursor: pointer;
}

.history-card-empty {
  cursor: default;
}

.history-visual {
  position: relative;
}

.history-card img,
.history-fallback {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: block;
  object-fit: cover;
  border-radius: 14px;
  background: #ece5d8;
}

.history-fallback {
  display: grid;
  place-items: center;
  color: var(--muted);
  font-weight: 700;
}

.history-badge {
  position: absolute;
  right: 10px;
  bottom: 10px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(16, 61, 47, 0.88);
  color: #fff;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.history-card h3 {
  margin: 12px 0 8px;
  font-size: 15px;
}

.history-card p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.65;
}

.history-meta {
  margin-top: 8px !important;
}

.image-modal {
  position: fixed;
  inset: 0;
  z-index: 50;
  display: grid;
  place-items: center;
  padding: 20px;
}

.image-modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(12, 12, 12, 0.6);
  backdrop-filter: blur(6px);
}

.image-modal-dialog {
  position: relative;
  width: min(1080px, 100%);
  max-height: calc(100vh - 40px);
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 18px;
  border-radius: 24px;
  background: rgba(255, 253, 249, 0.98);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(14, 14, 14, 0.22);
}

.image-modal-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.image-modal-head h3 {
  margin: 0;
  font-size: 24px;
}

.image-modal-stage {
  overflow: auto;
  border-radius: 18px;
  background: #f5efe5;
  border: 1px solid var(--line);
}

.image-modal-stage img {
  width: 100%;
  display: block;
}

.image-modal-actions {
  display: flex;
  justify-content: flex-end;
}

@media (max-width: 1100px) {
  .topbar,
  .workspace-grid,
  .history-grid,
  .template-grid.compact,
  .context-bar {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .page-shell {
    width: min(100% - 20px, 100%);
    padding-top: 16px;
    padding-bottom: 42px;
  }

  .topbar,
  .panel {
    padding: 18px;
    border-radius: 22px;
  }

  .session-panel,
  .field-grid,
  .video-spec-grid,
  .result-meta {
    grid-template-columns: 1fr;
  }

  .panel-heading,
  .reference-head,
  .reference-preview,
  .submit-box,
  .result-actions,
  .session-actions,
  .image-modal-head,
  .switch-group {
    flex-direction: column;
    display: flex;
    align-items: stretch;
  }

  .preset-bar {
    flex-direction: column;
  }

  .reference-preview {
    display: block;
  }

  .reference-gallery {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 14px;
  }

  .result-stage {
    min-height: 320px;
  }
}