:root {
  --bg: #f6f9f5;
  --bg-tint: #ecf3eb;
  --card: #ffffff;
  --card-hover: #fafdf9;
  --text: #1f2d24;
  --muted: #6b7c70;
  --border: #e0ebdf;
  --border-strong: #c9d8c6;
  --line-green: #06c755;
  --line-green-hover: #05b34d;
  --line-green-soft: #e8f8ee;
  --line-green-tint: #d6f1df;
  --warn: #c8843a;
  --warn-soft: #fff5e3;
  --shadow-sm: 0 1px 2px rgba(40, 80, 50, 0.04);
  --shadow: 0 2px 12px rgba(40, 80, 50, 0.06);
  --shadow-lg: 0 10px 30px rgba(40, 80, 50, 0.10);
  --radius: 18px;
  --radius-lg: 24px;
  --radius-sm: 10px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  background-image:
    radial-gradient(circle at 12% 18%, rgba(6, 199, 85, 0.06) 0%, transparent 45%),
    radial-gradient(circle at 88% 82%, rgba(6, 199, 85, 0.04) 0%, transparent 45%);
  background-attachment: fixed;
  color: var(--text);
  font-family: 'Noto Sans TC', 'M PLUS Rounded 1c', -apple-system,
    BlinkMacSystemFont, 'Segoe UI', 'PingFang TC', 'Microsoft JhengHei',
    sans-serif;
  font-weight: 400;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.auth-widget {
  position: fixed;
  top: 12px;
  right: 12px;
  z-index: 100;
}

.auth-login {
  background: var(--line-green);
  color: #fff;
  border: none;
  border-radius: 999px;
  padding: 0.55rem 1rem;
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  box-shadow: 0 2px 8px rgba(6, 199, 85, 0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.auth-login:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(6, 199, 85, 0.4);
}

.auth-user {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px 8px 4px 4px;
  box-shadow: var(--shadow);
  font-size: 0.78rem;
}
.auth-user img {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  object-fit: cover;
  background: var(--bg-tint);
}
.auth-info {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}
.auth-name {
  font-weight: 700;
  color: var(--text);
  max-width: 8em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.auth-quota {
  color: var(--muted);
  font-size: 0.72rem;
}
.auth-quota.full { color: #c0392b; font-weight: 700; }
.auth-logout {
  background: transparent;
  border: none;
  color: var(--muted);
  font-size: 0.7rem;
  cursor: pointer;
  padding: 4px 6px;
}
.auth-logout:hover { color: var(--text); }

.auth-admin-reset {
  background: #fff7e8;
  border: 1px solid #f3d38a;
  color: #6e4c10;
  font-size: 0.85rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 50%;
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.12s ease;
}
.auth-admin-reset:hover { transform: scale(1.15); background: #ffe2a3; }

.flash-highlight {
  animation: flashHl 1.5s ease;
}
@keyframes flashHl {
  0%   { box-shadow: 0 0 0 0 rgba(6, 199, 85, 0.6); }
  50%  { box-shadow: 0 0 0 12px rgba(6, 199, 85, 0); }
  100% { box-shadow: 0 0 0 0 rgba(6, 199, 85, 0); }
}

header {
  text-align: center;
  padding: 3.5rem 1.25rem 1.5rem;
}

header h1 {
  margin: 0;
  font-family: 'M PLUS Rounded 1c', 'Noto Sans TC', sans-serif;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}

.brand-mark {
  display: inline-block;
  background: var(--line-green);
  color: #fff;
  padding: 0.18em 0.55em 0.22em;
  border-radius: 0.4em;
  font-weight: 900;
  letter-spacing: 0.05em;
  box-shadow: 0 2px 6px rgba(6, 199, 85, 0.25);
  font-size: 0.85em;
}

.tagline {
  color: var(--muted);
  margin: 0.5rem auto 0;
  max-width: 36rem;
  font-size: 0.95rem;
}

.howto {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 0.75rem;
  margin: 1.5rem auto 0;
  max-width: 880px;
  flex-wrap: wrap;
}

.howto-step {
  flex: 1 1 240px;
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.9rem 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  text-align: left;
}

.howto-step strong {
  display: block;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
}

.howto-step span {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.55;
}

.howto-byog-hint {
  max-width: 640px;
  margin: 0.85rem auto 0;
  padding: 0.55rem 0.85rem;
  background: #fff7e8;
  border: 1px dashed #e4bf7a;
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  color: var(--text);
  line-height: 1.6;
}
.howto-byog-hint strong { color: #a3731b; }

.howto-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--line-green-soft);
  color: var(--line-green);
  font-weight: 800;
  font-size: 0.95rem;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

/* === Current grid preview (in 🅱) === */
#current-grid-area {
  margin-bottom: 1rem;
}
.current-grid-meta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  flex-wrap: wrap;
}
#current-grid-source-badge {
  background: var(--line-green-soft);
  color: var(--line-green-hover);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 700;
}
#current-grid-name {
  flex: 1;
  min-width: 12rem;
  background: #fafdf9;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  font-size: 0.88rem;
  font-family: inherit;
  color: var(--text);
}
#current-grid-name:focus {
  outline: none;
  border-color: var(--line-green);
  box-shadow: 0 0 0 3px var(--line-green-soft);
}
.muted { color: var(--muted); font-size: 0.78rem; }
.current-grid-stage {
  background: repeating-conic-gradient(#f4f4f4 0% 25%, #ffffff 0% 50%) 50% / 16px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.6rem;
}
.current-grid-stage img {
  max-width: 100%;
  max-height: 320px;
  display: block;
}
.current-grid-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.current-grid-actions button { font-size: 0.85rem; padding: 0.5rem 0.85rem; }
#current-grid-empty {
  background: var(--bg-tint);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 0.6rem;
}

/* === History carousel === */
#history-section {
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--border);
}
.history-header {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
  flex-wrap: wrap;
}
.history-header h3 { margin: 0; font-size: 1rem; }
#history-count.warn { color: #c0392b; font-weight: 700; }

.history-cards {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding: 0.4rem 0.2rem 0.6rem;
  scrollbar-width: thin;
}
.history-cards::-webkit-scrollbar { height: 8px; }
.history-cards::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }

.history-card {
  flex: 0 0 150px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.4rem;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: border-color 0.15s ease;
}
.history-card:hover { border-color: var(--line-green); }
.history-card.selected {
  border-color: var(--line-green);
  box-shadow: 0 0 0 2px var(--line-green-soft);
}
.history-card img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 6px;
  background: var(--bg-tint);
}
.history-card-badges {
  position: absolute;
  top: 6px;
  left: 6px;
  display: flex;
  gap: 2px;
  font-size: 0.78rem;
  background: rgba(255, 255, 255, 0.85);
  padding: 1px 6px;
  border-radius: 6px;
}
.history-card-name {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-card-meta {
  font-size: 0.7rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.history-card-actions {
  display: flex;
  gap: 2px;
  margin-top: 2px;
}
.history-card-actions button {
  flex: 1;
  background: var(--bg-tint);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 3px 0;
  font-size: 0.78rem;
  cursor: pointer;
  font-family: inherit;
  color: var(--text);
}
.history-card-actions button:hover {
  background: var(--line-green-soft);
  border-color: var(--line-green);
}

/* Toast for eviction notification */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(31, 45, 36, 0.95);
  color: #fff;
  padding: 0.7rem 1.2rem;
  border-radius: 999px;
  font-size: 0.88rem;
  z-index: 1000;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  animation: toast-in 0.3s ease, toast-out 0.3s ease 4.7s forwards;
}
@keyframes toast-in {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}
@keyframes toast-out {
  to { opacity: 0; transform: translateX(-50%) translateY(20px); }
}

.path-picker-hint {
  text-align: center;
  margin: 0.5rem 0 1rem;
  padding: 0.55rem 1rem;
  background: var(--line-green-soft);
  color: var(--line-green-hover);
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.92rem;
}

.rules-banner {
  margin: 0.5rem 0 1rem;
  padding: 1rem 1.2rem 1.1rem;
  background: #fff7e8;
  border: 2px solid #e4bf7a;
  border-radius: var(--radius);
  font-size: 0.9rem;
  line-height: 1.65;
}
.rules-banner h3 {
  margin: 0 0 0.3rem;
  color: #6e4c10;
  font-size: 1rem;
  font-weight: 700;
}
.rules-banner ul {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1.2rem;
}
.rules-banner ul li { margin: 0.3rem 0; }
.rules-banner code, .rules-banner a {
  color: #6e4c10;
  font-weight: 600;
}
.rules-banner a {
  text-decoration: none;
  border-bottom: 1px dotted #d4a24a;
}
.rules-banner a:hover { border-bottom-style: solid; }
.rules-check {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  margin-top: 0.6rem;
  padding: 0.6rem 0.85rem;
  background: #fff;
  border: 1px solid #e4bf7a;
  border-radius: var(--radius-sm);
  cursor: pointer;
  user-select: none;
}
.rules-check input { margin-top: 0.2rem; flex-shrink: 0; }
.rules-check span { font-size: 0.88rem; color: var(--text); }

.rules-banner.acked {
  padding: 0.55rem 0.95rem;
  background: var(--line-green-soft);
  border: 1px solid var(--line-green);
}
.rules-banner.acked h3,
.rules-banner.acked .hint,
.rules-banner.acked ul { display: none; }
.rules-banner.acked .rules-check {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
}
.rules-banner.acked .rules-check::before {
  content: "✅ 已確認 LINE 規定 — ";
  color: var(--line-green-hover);
  font-weight: 700;
}
.rules-banner.acked .rules-check span { font-size: 0.82rem; }
.rules-banner.acked .rules-check input { display: none; }

.upload-box.locked {
  pointer-events: none;
  opacity: 0.45;
  filter: grayscale(0.5);
  position: relative;
}
.upload-box.locked::after {
  content: "🔒 請先勾選最上方的 LINE 規定確認";
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid #e4bf7a;
  color: #6e4c10;
  padding: 4px 10px;
  border-radius: 12px;
  font-size: 0.78rem;
  font-weight: 600;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  transition: box-shadow 0.25s ease;
}

.card:hover { box-shadow: var(--shadow-lg); }

.card h2 {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text);
}

.hint {
  color: var(--muted);
  font-size: 0.88rem;
  margin: 0.4rem 0 1rem;
  line-height: 1.65;
}
.hint.mini {
  margin-top: 0.5rem;
  padding: 0.6rem 0.8rem;
  background: var(--bg-tint);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
}

.coffee-hint {
  margin-top: 0.5rem;
  padding: 0.65rem 0.85rem;
  background: #fff7e8;
  border: 1px solid #ffe2a3;
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 0.85rem;
}
.coffee-hint a {
  color: #a3731b;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dotted #d4a24a;
}
.coffee-hint a:hover { border-bottom-style: solid; }

.inline-icon {
  width: 16px;
  height: 16px;
  vertical-align: -3px;
  color: #a3731b;
  margin-right: 4px;
}

.phrases-box {
  margin: 0.5rem 0 0.75rem;
  background: var(--bg-tint);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
}
.phrases-box summary {
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  color: var(--text);
}
.phrases-box summary::-webkit-details-marker { display: none; }
.phrases-box summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.2s ease;
  color: var(--muted);
}
.phrases-box[open] summary::before { transform: rotate(90deg); }
.phrases-body {
  padding-top: 0.6rem;
  margin-top: 0.5rem;
  border-top: 1px dashed var(--border-strong);
}

.estimate {
  margin: 0.6rem 0 0.75rem;
  padding: 0.55rem 0.85rem;
  background: var(--line-green-soft);
  border-radius: var(--radius-sm);
  font-size: 0.83rem;
  color: var(--text);
}
.estimate strong { color: var(--line-green-hover); }

#gen-progress {
  margin-top: 0.85rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
#gen-progress-text {
  color: var(--muted);
  font-size: 0.85rem;
}

.preview-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-bottom: 0.85rem;
}

.campaign-picker {
  margin: 0.25rem 0 0.85rem;
  padding: 0.65rem 0.85rem;
  background: #fff7e8;
  border: 1px solid #f3d38a;
  border-radius: var(--radius-sm);
}
.campaign-picker-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.88rem;
  font-weight: 600;
  color: #6e4c10;
  flex-wrap: wrap;
}
.campaign-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 8px;
  margin-top: 0.6rem;
}
.campaign-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0.6rem 0.7rem;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.12s ease;
  font-size: 0.82rem;
  text-align: left;
  font-family: inherit;
}
.campaign-card:hover { border-color: #f3d38a; transform: translateY(-1px); }
.campaign-card.selected {
  border-color: #d4a24a;
  background: #fffcf5;
  box-shadow: 0 2px 6px rgba(212, 162, 74, 0.2);
}
.campaign-card .name {
  font-weight: 700;
  color: var(--text);
  font-size: 0.92rem;
}
.campaign-card .blurb {
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.5;
}
.campaign-card .deadline {
  font-size: 0.72rem;
  color: var(--muted);
}
.campaign-card .deadline.urgent { color: #c0392b; font-weight: 700; }
.campaign-card .deadline.expired { color: #999; text-decoration: line-through; }
.campaign-card.expired-card {
  opacity: 0.7;
  background: #f5f5f5;
  border-color: #ddd;
}
.campaign-card.expired-card:hover {
  opacity: 0.9;
  border-color: #b8b8b8;
}
.campaign-card.expired-card.selected {
  opacity: 1;
  border-color: #999;
  background: #ececec;
}
.campaign-card .expired-badge {
  margin-top: 4px;
  display: inline-block;
  padding: 2px 6px;
  background: #555;
  color: #fff;
  border-radius: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}
.campaign-active.is-expired {
  border-color: #999;
  background: #fafafa;
}
.campaign-active .expired-warn {
  margin: -0.3rem -0.5rem 0.5rem;
  padding: 6px 10px;
  background: #fff4d6;
  border-left: 3px solid #d4a24a;
  border-radius: 4px;
  font-size: 0.78rem;
  color: #6e4c10;
}
.campaign-active {
  margin-top: 0.6rem;
  padding: 0.65rem 0.85rem;
  background: var(--card);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  border: 1px dashed #d4a24a;
}
.campaign-active strong { color: #6e4c10; }
.campaign-active a {
  color: #6e4c10;
  text-decoration: none;
  border-bottom: 1px dotted #d4a24a;
}
.campaign-active a:hover { border-bottom-style: solid; }
.field.locked {
  opacity: 0.55;
}
.field.locked select {
  pointer-events: none;
  background: #f5f5f5;
}

.slot-status {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  padding: 0.6rem 0.85rem;
  margin: 0.75rem 0 0.5rem;
  background: var(--line-green-soft);
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  color: var(--text);
  flex-wrap: wrap;
}
.slot-status-text { color: var(--text); }

.link-btn {
  background: transparent;
  border: none;
  padding: 0;
  color: var(--line-green-hover);
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px dotted var(--line-green);
}
.link-btn:hover { border-bottom-style: solid; }

dialog menu {
  display: flex;
  gap: 0.4rem;
  justify-content: flex-end;
  margin: 1rem 0 0;
  padding: 0;
  flex-wrap: wrap;
}
dialog menu button {
  padding: 0.55rem 0.95rem;
  font-size: 0.85rem;
  white-space: nowrap;
}

.theme-gen-row {
  display: flex;
  gap: 0.5rem;
  margin: 0.6rem 0 0.5rem;
}
.theme-gen-row input {
  flex: 1;
  background: #fafdf9;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 0.88rem;
  font-family: inherit;
}
.theme-gen-row input:focus {
  outline: none;
  border-color: var(--line-green);
  box-shadow: 0 0 0 3px var(--line-green-soft);
}
.theme-gen-row button {
  white-space: nowrap;
  font-size: 0.85rem;
  padding: 0.55rem 0.95rem;
}

.slot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin: 1rem 0 0.25rem;
}

.slot-cell {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  background: #fbfdfa;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.slot-head {
  font-size: 0.7rem;
  color: var(--muted);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-align: center;
}

.slot-select {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 0.74rem;
  color: var(--text);
  font-family: inherit;
  width: 100%;
  cursor: pointer;
}
.slot-select:focus {
  outline: none;
  border-color: var(--line-green);
}

.slot-custom {
  background: #ffffff;
  border: 1px solid var(--line-green);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 0.74rem;
  color: var(--text);
  font-family: inherit;
  width: 100%;
}

.slot-action-toggle {
  background: #fff8ef;
  border: 1px dashed #d4ad6a;
  color: #6b4a1f;
  font-size: 0.65rem;
  padding: 2px 6px;
  margin-top: 3px;
  cursor: pointer;
  border-radius: 4px;
  align-self: flex-start;
  font-weight: 600;
  font-family: inherit;
}
.slot-action-toggle:hover {
  background: #ffe9c2;
}

.slot-action {
  background: #fff8ef;
  border: 1px dashed #d4ad6a;
  border-radius: 6px;
  padding: 3px 6px;
  font-size: 0.68rem;
  color: #6b4a1f;
  font-family: inherit;
  width: 100%;
}
.slot-action::placeholder {
  color: #ba9655;
  font-style: italic;
}

#settings-dialog {
  max-width: 560px;
}

@media (max-width: 560px) {
  .slot-grid { grid-template-columns: repeat(2, 1fr); gap: 6px; }
  .slot-cell { padding: 0.4rem; }
  .slot-select, .slot-custom { font-size: 0.72rem; }
}

.upload-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 2.5rem 1rem;
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
  text-align: center;
  gap: 0.5rem;
  color: var(--muted);
  background: linear-gradient(180deg, #fbfdfa 0%, #fdfefc 100%);
}

.upload-box:hover,
.upload-box.dragover {
  border-color: var(--line-green);
  background: var(--line-green-soft);
  color: var(--line-green-hover);
  transform: translateY(-1px);
}

.upload-icon {
  width: 44px;
  height: 44px;
  color: var(--muted);
  transition: color 0.2s ease, transform 0.2s ease;
}
.upload-box:hover .upload-icon,
.upload-box.dragover .upload-icon {
  color: var(--line-green);
  transform: translateY(-2px);
}

.upload-box.compact {
  padding: 1.4rem 1rem;
}

.btn-icon { width: 18px; height: 18px; flex-shrink: 0; }

.upload-or-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  margin: 0.85rem 0 0;
}
.or-divider {
  color: var(--muted);
  font-size: 0.85rem;
}

.camera-dialog {
  max-width: 560px;
  width: calc(100% - 2rem);
}
.camera-dialog h3 { margin: 0 0 0.6rem; }
.camera-stage {
  width: 100%;
  aspect-ratio: 1 / 1;
  background: #000;
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.75rem;
}
.camera-stage video,
.camera-stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  /* mirror so user feels like a mirror */
  transform: scaleX(-1);
}
.camera-stage img {
  transform: none; /* preview already mirrored when captured */
}

#source-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.85rem;
}

#source-img {
  max-width: 240px;
  max-height: 240px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background:
    repeating-conic-gradient(#f4f4f4 0% 25%, #ffffff 0% 50%) 50% / 16px 16px;
  box-shadow: var(--shadow-sm);
  object-fit: contain;
}

.source-actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
}

.field-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  font-size: 0.85rem;
  color: var(--muted);
}

.field-hint {
  font-size: 0.7rem;
  color: var(--muted);
  line-height: 1.35;
  margin-top: 1px;
  font-weight: 400;
}

.field input,
.field select,
.field textarea {
  background: #fafdf9;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  width: 100%;
}

.field textarea {
  resize: vertical;
  font-family: ui-monospace, 'SF Mono', Menlo, Consolas, monospace;
  line-height: 1.7;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--line-green);
  box-shadow: 0 0 0 3px var(--line-green-soft);
}

.color-field input[type="color"] {
  height: 40px;
  padding: 4px;
  cursor: pointer;
}

.presets-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0.5rem 0 0.75rem;
}

.presets-label {
  font-size: 0.82rem;
  color: var(--muted);
  margin-right: 0.25rem;
}

.chip {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.35rem 0.85rem;
  font-size: 0.82rem;
  color: var(--text);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: inherit;
}
.chip:hover {
  background: var(--line-green-soft);
  border-color: var(--line-green);
  color: var(--line-green-hover);
}

button, .primary, .ghost {
  font: inherit;
  border: none;
  border-radius: 999px;
  padding: 0.75rem 1.4rem;
  cursor: pointer;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  transition: all 0.18s ease;
  letter-spacing: 0.03em;
}

.primary {
  background: var(--line-green);
  color: #ffffff;
  box-shadow: 0 2px 8px rgba(6, 199, 85, 0.35);
}

.primary:hover:not(:disabled) {
  background: var(--line-green-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(6, 199, 85, 0.4);
}

.primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.primary.big {
  padding: 1rem 1.5rem;
  font-size: 1rem;
  width: 100%;
}

.ghost.big {
  padding: 0.85rem 1.25rem;
  font-size: 0.95rem;
  width: 100%;
  margin-top: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.ghost {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
}

.ghost:hover { background: var(--card-hover); border-color: var(--border-strong); }

#bg-progress {
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 8px;
  width: 100%;
  max-width: 320px;
}

.bar {
  height: 6px;
  background: var(--bg-tint);
  border-radius: 999px;
  overflow: hidden;
}

.bar-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--line-green) 0%, #84e0a8 100%);
  transition: width 0.3s ease;
  border-radius: 999px;
}

#bg-progress-text {
  color: var(--muted);
  font-size: 0.82rem;
  text-align: center;
}

.stickers-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 10px;
  margin-top: 0.5rem;
}

.sticker-cell {
  position: relative;
  aspect-ratio: 370 / 320;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background:
    repeating-conic-gradient(#f4f4f4 0% 25%, #ffffff 0% 50%) 50% / 12px 12px;
  cursor: pointer;
  overflow: hidden;
  transition: border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.sticker-cell:hover {
  border-color: var(--line-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.sticker-cell img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.sticker-cell::after {
  content: attr(data-num);
  position: absolute;
  top: 4px;
  left: 6px;
  font-size: 0.7rem;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.85);
  border-radius: 4px;
  padding: 1px 5px;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.sticker-cell .edit-overlay {
  position: absolute;
  inset: 0;
  background: rgba(6, 199, 85, 0.85);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  opacity: 0;
  font-weight: 600;
  font-size: 0.85rem;
  transition: opacity 0.15s ease;
  pointer-events: none;
}
.sticker-cell:hover .edit-overlay { opacity: 1; }

.sticker-cell.excluded {
  opacity: 0.35;
  filter: grayscale(0.6);
}
.sticker-cell.excluded::before {
  content: "排除";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 800;
  color: #c0392b;
  background: rgba(255, 255, 255, 0.4);
  z-index: 1;
  pointer-events: none;
}

.tile-include-toggle {
  position: absolute;
  top: 4px;
  right: 4px;
  z-index: 3;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 50%;
  background: var(--line-green);
  color: #fff;
  font-weight: 800;
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.2);
  transition: background 0.12s ease;
}
.tile-include-toggle:hover { background: var(--line-green-hover); }
.sticker-cell.excluded .tile-include-toggle {
  background: #c0392b;
}
.sticker-cell.excluded .tile-include-toggle:hover { background: #a8302a; }

.tile-download {
  position: absolute;
  bottom: 4px;
  right: 4px;
  z-index: 3;
  width: 24px;
  height: 24px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.15);
  transition: background 0.12s ease, transform 0.1s ease;
}
.tile-download:hover { background: #fff; transform: scale(1.1); }

.selection-status {
  margin: 0.25rem 0 0.85rem;
  padding: 0.55rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  text-align: center;
}
.selection-status.ready { background: var(--line-green-soft); color: var(--line-green-hover); }
.selection-status.short { background: #fff4e0; color: #c8843a; }
.selection-status.over  { background: #ffe5e2; color: #c0392b; }

.footer-note {
  font-size: 0.78rem;
  opacity: 0.75;
}
.sticker-cell.busy {
  pointer-events: none;
  opacity: 0.5;
}
.sticker-cell.busy::before {
  content: "重抽中…";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--line-green-hover);
  background: rgba(255, 255, 255, 0.85);
  z-index: 2;
}

.download-grid {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.download-side {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.download-side .ghost { flex: 1 1 auto; }

.tip-box {
  background: var(--line-green-soft);
  border-radius: var(--radius-sm);
  padding: 0.75rem 0.95rem;
  margin: 0.6rem 0 0.5rem;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text);
}

.tip-box summary {
  cursor: pointer;
  list-style: none;
  padding: 0.1rem 0;
  color: var(--line-green-hover);
  font-weight: 600;
}
.tip-box summary::-webkit-details-marker { display: none; }
.tip-box summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 6px;
  transition: transform 0.2s ease;
  color: var(--line-green);
}
.tip-box[open] summary::before { transform: rotate(90deg); }

.tip-box strong { color: var(--line-green-hover); margin-right: 2px; }

.tip-body {
  margin-top: 0.6rem;
  padding-top: 0.6rem;
  border-top: 1px dashed rgba(6, 199, 85, 0.3);
}
.tip-body ul, .tip-body ol { margin: 0.4rem 0; padding-left: 1.4rem; }
.tip-body li { margin: 0.25rem 0; }
.tip-body code {
  background: #fff;
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.85em;
  border: 1px solid var(--border);
  color: var(--line-green-hover);
}
.tip-box a {
  color: var(--line-green-hover);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dotted var(--line-green);
}
.tip-box a:hover { border-bottom-style: solid; }

.warn {
  background: var(--warn-soft);
  border-left: 3px solid var(--warn);
  padding: 0.5rem 0.75rem;
  border-radius: 6px;
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--text);
}

dialog {
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  max-width: 480px;
  width: calc(100% - 2rem);
  box-shadow: var(--shadow-lg);
}
dialog::backdrop { background: rgba(31, 45, 36, 0.45); }
dialog h3 { margin-top: 0; font-weight: 700; }

.edit-preview-wrap {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

#edit-canvas {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background:
    repeating-conic-gradient(#f4f4f4 0% 25%, #ffffff 0% 50%) 50% / 16px 16px;
}

dialog menu {
  display: flex;
  gap: 0.4rem;
  justify-content: flex-end;
  margin: 1rem 0 0;
  padding: 0;
  flex-wrap: wrap;
}

footer {
  text-align: center;
  color: var(--muted);
  padding: 2.5rem 1.25rem;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
}
footer p { margin: 0.25rem 0; }
footer .footer-tools {
  font-weight: 600;
  color: var(--text);
}
footer a {
  color: var(--line-green-hover);
  text-decoration: none;
  border-bottom: 1px dotted var(--line-green);
}
footer a:hover { border-bottom-style: solid; }

@media (max-width: 480px) {
  header { padding: 2rem 1rem 1rem; }
  .card { padding: 1.25rem; }
  .stickers-grid { grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)); }
}