:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --surface: #f6f8fa;
  --hover: #eef1f4;
  --text: #1f2328;
  --text-muted: #59636e;
  --border: #d1d9e0;
  --border-muted: #e5e9ed;
  --accent: #1f2328;
  --accent-text: #ffffff;
  --danger: #cf222e;
  --focus: #0969da;
  --radius: 6px;
  --content: 1080px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --surface: #151b23;
    --hover: #1c232c;
    --text: #f0f6fc;
    --text-muted: #9198a1;
    --border: #3d444d;
    --border-muted: #262c34;
    --accent: #f0f6fc;
    --accent-text: #0d1117;
    --danger: #f85149;
    --focus: #4493f8;
  }
}

* {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  font-size: 15px;
  line-height: 1.5;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

[hidden] {
  display: none !important;
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 1px;
}

.muted {
  color: var(--text-muted);
}

.mono {
  font-family: var(--mono);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

input[type="search"],
input[type="text"],
input[type="url"],
select {
  min-width: 0;
  height: 36px;
  padding: 0 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;

  &:hover {
    background: var(--hover);
  }

  &.primary {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--accent-text);
  }

  &:disabled {
    opacity: 0.45;
    cursor: not-allowed;
  }

  &.block {
    display: flex;
    width: 100%;
    height: 40px;
  }
}

button.link {
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;

  &:hover {
    text-decoration: underline;
  }
}

/* ---- 頁首 ---- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);

  .header-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px 32px;
    max-width: var(--content);
    margin: 0 auto;
    padding: calc(16px + env(safe-area-inset-top)) 16px 4px;
  }

  .brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;

    img {
      border-radius: 7px;
    }
  }

  h1 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
  }

  .stats {
    display: flex;
    gap: 28px;
    margin: 0;

    div {
      display: flex;
      flex-direction: column;
    }

    dt {
      color: var(--text-muted);
      font-size: 12px;
    }

    dd {
      margin: 0;
      font-size: 22px;
      font-weight: 600;
      font-variant-numeric: tabular-nums;
      line-height: 1.25;
    }

    .total {
      color: var(--text-muted);
      font-size: 15px;
      font-weight: 400;
    }
  }
}

.tabs {
  .tabs-inner {
    display: flex;
    gap: 4px;
    max-width: var(--content);
    margin: 0 auto;
    padding: 0 8px;
  }

  button {
    position: relative;
    height: 44px;
    padding: 0 10px;
    border: 0;
    background: none;
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;

    &:hover {
      color: var(--text);
    }

    &[aria-selected="true"] {
      color: var(--text);
      font-weight: 600;

      &::after {
        content: "";
        position: absolute;
        right: 8px;
        bottom: -1px;
        left: 8px;
        height: 2px;
        background: var(--accent);
      }
    }
  }
}

/* ---- 版面：寬螢幕右側放側欄，不夠寬就排到下方 ---- */

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  max-width: var(--content);
  margin: 0 auto;
  padding: 20px 16px 0;
}

@media (min-width: 1000px) {
  body:not([data-active-tab="ended"]) .layout:has(.promo:not([hidden])) {
    grid-template-columns: minmax(0, 1fr) 260px;
  }

  .promo {
    position: sticky;
    top: 16px;
    align-self: start;
  }
}

main {
  min-height: 60vh;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;

  input[type="search"] {
    flex: 1 1 220px;
  }

  select {
    flex: 0 1 150px;
  }
}

.button-group {
  display: inline-flex;

  button {
    height: 36px;
    padding: 0 14px;
    border: 1px solid var(--border);
    background: var(--bg);
    color: var(--text-muted);
    font-size: 14px;
    cursor: pointer;

    &:first-child {
      border-radius: var(--radius) 0 0 var(--radius);
    }

    &:last-child {
      border-radius: 0 var(--radius) var(--radius) 0;
    }

    & + button {
      margin-left: -1px;
    }

    &[aria-checked="true"] {
      position: relative;
      background: var(--surface);
      color: var(--text);
      font-weight: 600;
    }
  }
}

/* ---- 表格 ---- */

.table-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 10px 12px;
  border-top: 1px solid var(--border-muted);
  text-align: left;
  vertical-align: middle;
}

thead th {
  border-top: 0;
  background: var(--surface);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}

tbody tr:hover {
  background: var(--surface);
}

tr.empty td {
  padding: 40px 12px;
  color: var(--text-muted);
  text-align: center;
}

.code-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 12px;

  > .empty {
    grid-column: 1 / -1;
    margin: 0;
    padding: 48px 0;
    color: var(--text-muted);
    text-align: center;
  }
}

.code-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg);
  content-visibility: auto;
  contain-intrinsic-size: auto 300px;

  .qr-slot {
    display: block;
    width: 100%;
    min-width: 0;
    aspect-ratio: 1;
    padding: 6px;
    border: 1px solid var(--border-muted);
    border-radius: var(--radius);
    background: #fff;
    cursor: zoom-in;
  }

  .code {
    font-family: var(--mono);
    font-size: 22px;
    letter-spacing: 0.02em;
    line-height: 1.2;
  }

  .code-title {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 2px 8px;
  }

  &.is-reported {
    border-style: dashed;
  }

  .code-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: auto;
  }

  &.is-redeemed {
    background: var(--surface);

    /* 只調透明度相機仍掃得到，模糊到 3px 以上才完全掃不出來，避免誤掃已兌換的 */
    .qr {
      opacity: 0.35;
      filter: blur(6px);
    }

    .code {
      color: var(--text-muted);
      text-decoration: line-through;
    }
  }
}

.reported {
  color: var(--danger);
  font-size: 12px;
  font-weight: 600;
}

.report-link {
  color: var(--text-muted);
  font-size: 12px;
  text-decoration: none;

  &:hover {
    color: var(--danger);
    text-decoration: underline;
  }
}

.check-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  cursor: pointer;
}

.place-table {
  .name {
    width: 38%;
  }

  td.name small {
    display: block;
    color: var(--text-muted);
    font-size: 12px;
  }

  td.address a {
    color: var(--text-muted);
    text-decoration: none;

    &:hover {
      color: var(--text);
      text-decoration: underline;
    }
  }

}

.result-count {
  margin: 0 0 8px;
  color: var(--text-muted);
  font-size: 13px;
}

.more {
  display: flex;
  margin: 16px auto 0;
}

/* ---- 掃描 ---- */

#panel-scan {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 560px;

  > input {
    height: 40px;
  }
}

.scan-actions {
  display: flex;
  gap: 8px;

  .btn {
    flex: 1;
    height: 44px;
    font-size: 15px;
  }
}

.file-button {
  position: relative;
  overflow: hidden;

  input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
  }
}

.field-error {
  margin: 0;
  color: var(--danger);
  font-size: 13px;
}

.scan-result {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);

  .scan-head {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 4px 12px;

    strong {
      font-size: 18px;
    }
  }

  .scan-code {
    font-family: var(--mono);
    font-size: 26px !important;
  }

  .scan-actions-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
  }

  .submit-link {
    align-self: flex-start;
    height: 36px;
  }

  .notice {
    margin: 0;
    padding: 8px 12px;
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    font-weight: 600;
  }

}


.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 0;

  > span:first-child,
  > label {
    color: var(--text-muted);
    font-size: 13px;
  }

  input {
    width: 100%;
  }
}



.input-row {
  display: flex;
  gap: 8px;

  input {
    flex: 1;
  }

  .btn {
    height: 36px;
  }
}

/* ---- 活動已結束分頁 ---- */

.ended {
  max-width: 720px;
  padding: 24px 0 0;

  h2 {
    margin: 0 0 12px;
    font-size: 28px;
  }

  p {
    margin: 0 0 8px;
    color: var(--text-muted);
    font-size: 16px;
  }

  .ended-works {
    margin-top: 40px;
  }

  h3 {
    margin: 0 0 12px;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
  }

  .promo-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
  }
}

/* 結束分頁已列出其他作品，不再重複顯示側欄 */
body[data-active-tab="ended"] .promo {
  display: none !important;
}

/* ---- 側欄 ---- */

.promo {
  h2 {
    margin: 0 0 8px;
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 600;
  }

  .promo-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 8px;
  }
}

.promo-card {
  display: flex;
  gap: 10px;
  align-items: center;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;

  &:hover {
    background: var(--surface);
  }

  img {
    flex: none;
    border-radius: var(--radius);
  }

  strong {
    display: block;
    font-size: 14px;
  }

  p {
    margin: 2px 0 0;
    color: var(--text-muted);
    font-size: 12px;
  }
}

/* ---- 對話框 ---- */

.dialog {
  width: min(92vw, 400px);
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  color: var(--text);

  &::backdrop {
    background: rgb(0 0 0 / 0.5);
  }

  .dialog-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    margin: 0 0 12px;
  }

  h2 {
    margin: 0;
    font-size: 16px;
  }

  #qr-dialog-title {
    font-family: var(--mono);
    font-size: 24px;
  }

  .field + .field {
    margin-top: 12px;
  }
}

.dialog-report {
  display: block;
  margin-top: 10px;
  text-align: center;
}

.qr-box {
  margin-bottom: 12px;
  padding: 8px;
  border-radius: var(--radius);
  background: #fff;
}

.qr {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  fill: #000;
}

.backup-result {
  min-height: 1.5em;
  margin: 8px 0 0;
  color: var(--text-muted);
  font-size: 13px;
}

.camera-dialog {
  width: min(94vw, 440px);

  video {
    display: block;
    width: 100%;
    aspect-ratio: 3 / 4;
    margin-bottom: 12px;
    border-radius: var(--radius);
    object-fit: cover;
    background: #000;
  }

  form {
    margin: 0;
  }
}

/* ---- 頁尾 ---- */

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  max-width: var(--content);
  margin: 40px auto 0;
  padding: 20px 16px calc(32px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;

  p {
    margin: 0;
  }

  nav {
    display: flex;
    gap: 16px;
  }

  a,
  button {
    color: var(--text-muted);
    font-size: 13px;
    text-decoration: none;

    &:hover {
      color: var(--text);
      text-decoration: underline;
    }
  }
}

@media (max-width: 560px) {
  th,
  td {
    padding: 10px 8px;
  }

  .code-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px;
  }

  .code-card {
    padding: 8px;

    .code-actions {
      flex-direction: column;
      align-items: stretch;
    }
  }

  .place-table .name {
    width: 45%;
  }

  .button-group {
    width: 100%;

    button {
      flex: 1;
    }
  }
}