:root {
  --ink: #151515;
  --muted: #66625b;
  --line: #ded7cc;
  --paper: #f5f1ea;
  --panel: #fffaf1;
  --accent: #1b7f6f;
  --accent-strong: #105b50;
  --danger: #b33131;
  --warning: #a66710;
  --ok: #16724f;
  --shadow: 0 18px 50px rgba(48, 42, 32, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(21, 21, 21, 0.035) 1px, transparent 1px),
    linear-gradient(rgba(21, 21, 21, 0.035) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  letter-spacing: 0;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  background: var(--accent);
  color: white;
  padding: 12px 18px;
  border-radius: 7px;
  cursor: pointer;
  font-weight: 700;
}

button:hover {
  background: var(--accent-strong);
}

input[type="text"],
input[type="number"],
input[type="password"],
input:not([type]),
select {
  width: 100%;
  border: 1px solid var(--line);
  background: #fffdf8;
  color: var(--ink);
  padding: 12px 13px;
  border-radius: 7px;
  outline: none;
}

input[type="file"] {
  width: 100%;
  border: 1px dashed #b9aa92;
  background: #fffdf8;
  padding: 18px;
  border-radius: 7px;
}

code {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--ink);
  color: #f7efe0;
  border-radius: 7px;
  font-weight: 900;
}

.alert {
  border-radius: 7px;
  padding: 13px 15px;
  margin-bottom: 16px;
  font-weight: 700;
}

.alert.error {
  background: #fff0ee;
  color: var(--danger);
  border: 1px solid #f0b6af;
}

.alert.ok {
  background: #edf9f3;
  color: var(--ok);
  border: 1px solid #a9d9c1;
}

.redeem-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.login-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}

.login-panel {
  width: min(560px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 8px;
  padding: clamp(24px, 5vw, 48px);
}

.redeem-panel {
  width: min(780px, 100%);
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 8px;
  padding: clamp(24px, 5vw, 52px);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 46px;
}

.admin-link,
.side-link {
  text-decoration: none;
  border: 1px solid var(--line);
  padding: 10px 13px;
  border-radius: 7px;
  background: #fffdf8;
  font-weight: 700;
}

.redeem-copy .eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.redeem-copy h1 {
  margin: 0;
  font-size: clamp(42px, 8vw, 86px);
  line-height: 0.98;
}

.redeem-copy p:last-child {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.7;
  margin: 20px 0 34px;
}

.redeem-form label,
.tool-card label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

.redeem-input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  margin-top: 10px;
}

.redeem-input-row input {
  min-height: 52px;
  font-size: 18px;
  text-transform: uppercase;
}

.login-form {
  display: grid;
  gap: 14px;
}

.login-form label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-weight: 700;
}

.download-panel {
  margin-top: 22px;
  border: 1px solid var(--line);
  background: #fffdf8;
  border-radius: 8px;
  padding: 18px;
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 12px;
  align-items: center;
}

.download-panel span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.download-panel strong {
  display: block;
  margin-top: 4px;
  font-size: 34px;
  line-height: 1;
}

.secondary-button {
  background: #2b2b2b;
}

.secondary-button:hover {
  background: #111;
}

.admin-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
}

.admin-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  padding: 28px;
  background: #151515;
  color: #f7efe0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.admin-sidebar .brand-mark {
  background: #f7efe0;
  color: #151515;
}

.admin-sidebar h1 {
  margin: 24px 0 12px;
  font-size: 34px;
  line-height: 1.1;
}

.admin-sidebar p {
  color: #c6bcaa;
  line-height: 1.7;
}

.admin-sidebar .side-link {
  color: #f7efe0;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.18);
  text-align: center;
}

.sidebar-actions {
  display: grid;
  gap: 10px;
}

.admin-user {
  color: #c6bcaa;
  font-weight: 800;
}

.side-button {
  width: 100%;
  color: #f7efe0;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.admin-content {
  padding: 28px;
  display: grid;
  gap: 22px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: 14px;
}

.stat,
.tool-card,
.table-section {
  background: rgba(255, 250, 241, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(48, 42, 32, 0.08);
}

.generated-section {
  background: rgba(255, 250, 241, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 26px rgba(48, 42, 32, 0.08);
  overflow: hidden;
}

.generated-section textarea {
  width: 100%;
  min-height: 150px;
  border: 0;
  border-top: 1px solid var(--line);
  background: #fffdf8;
  color: var(--ink);
  padding: 16px 20px;
  resize: vertical;
  outline: none;
  font-family: Consolas, "Courier New", monospace;
  line-height: 1.7;
}

.copy-button {
  padding: 9px 12px;
}

.stat {
  min-height: 112px;
  padding: 18px;
  display: grid;
  align-content: space-between;
}

.stat span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.stat strong {
  font-size: 38px;
  line-height: 1;
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.tool-card {
  padding: 22px;
  display: grid;
  gap: 14px;
}

.file-drop {
  min-height: 126px;
  border: 1px dashed #b9aa92;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(27, 127, 111, 0.08), transparent 52%),
    #fffdf8;
  display: grid;
  place-items: center;
  gap: 7px;
  padding: 18px;
  text-align: center;
  cursor: pointer;
}

.file-drop:hover,
.file-drop:focus-within {
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px rgba(27, 127, 111, 0.18);
}

.file-drop input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-drop-main {
  color: var(--ink);
  font-size: 18px;
  font-weight: 900;
}

.file-drop-sub {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  word-break: break-all;
}

.tool-card h2,
.section-title h2 {
  margin: 0;
}

.tool-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.table-section {
  min-width: 0;
  overflow: hidden;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.section-title span {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
}

.filter-form {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(150px, 190px) auto auto;
  gap: 10px;
  align-items: end;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.54);
}

.filter-form label {
  display: grid;
  gap: 5px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.filter-form input,
.filter-form select {
  min-height: 39px;
  padding: 9px 11px;
}

.filter-form button {
  min-height: 39px;
  padding: 9px 14px;
}

.reset-link {
  min-height: 39px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fffdf8;
  padding: 0 12px;
  font-weight: 800;
  color: var(--muted);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 860px;
}

th,
td {
  text-align: left;
  padding: 13px 16px;
  border-bottom: 1px solid rgba(222, 215, 204, 0.8);
  vertical-align: top;
  white-space: nowrap;
}

th {
  color: var(--muted);
  font-size: 13px;
  background: rgba(255, 253, 248, 0.7);
}

.name-cell {
  font-weight: 800;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.badge.available,
.badge.unused {
  background: #e8f6f0;
  color: var(--ok);
}

.badge.reserved {
  background: #fff5df;
  color: var(--warning);
}

.badge.redeemed {
  background: #ece8df;
  color: #5e574d;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 30px;
}

.pager {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 18px;
}

.pager a,
.pager span,
.pager strong {
  min-width: 68px;
  text-align: center;
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 10px;
  background: #fffdf8;
  font-weight: 800;
}

.pager span {
  color: #aaa196;
}

.pager strong {
  min-width: 88px;
  background: transparent;
}

@media (max-width: 960px) {
  .admin-shell {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: static;
    height: auto;
    gap: 24px;
  }

  .stats-grid,
  .work-grid {
    grid-template-columns: 1fr;
  }

  .download-panel {
    grid-template-columns: 1fr;
  }

  .filter-form {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .redeem-shell,
  .admin-content,
  .admin-sidebar {
    padding: 18px;
  }

  .redeem-input-row {
    grid-template-columns: 1fr;
  }

  .section-title {
    align-items: flex-start;
    flex-direction: column;
  }
}