:root {
  color-scheme: light;
  --canvas: #eef1f4;
  --surface: #ffffff;
  --surface-soft: #f5f7f9;
  --surface-sunken: #e7ebef;
  --text: #151920;
  --text-secondary: #59616c;
  --text-tertiary: #848d98;
  --line: #cfd5dc;
  --line-strong: #aeb7c2;
  --accent: #204fc7;
  --accent-hover: #193fa2;
  --accent-soft: #e9efff;
  --on-accent: #ffffff;
  --success: #18754a;
  --success-soft: #eaf7f0;
  --warning: #9b5b00;
  --warning-soft: #fff4df;
  --danger: #a33a3a;
  --danger-soft: #fff0f0;
  --shadow: 0 24px 64px rgba(23, 28, 40, 0.12), 0 2px 8px rgba(23, 28, 40, 0.06);
  --radius-control: 9px;
  --radius-card: 16px;
  --motion: 160ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --font-ui: system-ui, -apple-system, "Segoe UI Variable Text", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "SF Pro Display", "Segoe UI Variable Display", system-ui, -apple-system, sans-serif;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --canvas: #0d1117;
  --surface: #171c24;
  --surface-soft: #12171f;
  --surface-sunken: #090d12;
  --text: #f1f4f7;
  --text-secondary: #adb6c1;
  --text-tertiary: #7d8895;
  --line: #303844;
  --line-strong: #4a5666;
  --accent: #86a9ff;
  --accent-hover: #aac2ff;
  --accent-soft: #1b2a4c;
  --on-accent: #09111d;
  --success: #70d7a5;
  --success-soft: #173226;
  --warning: #f2c36f;
  --warning-soft: #362a16;
  --danger: #ff9b9b;
  --danger-soft: #3b2024;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.36), 0 2px 8px rgba(0, 0, 0, 0.24);
}

* { box-sizing: border-box; }

html {
  min-height: 100%;
  background: var(--canvas);
}

body {
  min-height: 100vh;
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font: 0.9rem/1.55 var(--font-ui);
  -webkit-font-smoothing: antialiased;
}

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

button,
a,
input,
select,
textarea { -webkit-tap-highlight-color: transparent; }

a { color: var(--accent); }

:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--accent) 34%, transparent);
  outline-offset: 2px;
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: grid;
  width: min(1180px, calc(100% - 32px));
  min-height: 72px;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 24px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--canvas) 92%, transparent);
  backdrop-filter: saturate(125%) blur(14px);
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: baseline;
  gap: 9px;
  color: var(--text);
  text-decoration: none;
}

.brand-cn {
  overflow: hidden;
  font: 650 1.08rem/1.1 var(--font-display);
  letter-spacing: -0.025em;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand i {
  width: 1px;
  height: 14px;
  align-self: center;
  background: var(--line-strong);
}

.brand-en {
  color: var(--text-secondary);
  font: 620 0.85rem/1 var(--font-display);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  min-height: 40px;
  border-radius: var(--radius-control);
  padding: 9px 11px;
  color: var(--text-secondary);
  font-weight: 600;
  text-decoration: none;
  transition: color var(--motion), background var(--motion);
}

.site-nav a:hover {
  background: var(--surface);
  color: var(--text);
}

.theme-toggle {
  display: inline-grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  background: var(--surface);
  color: var(--text-secondary);
  cursor: pointer;
  transition: color var(--motion), border-color var(--motion), transform var(--motion);
}

.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle:active { transform: scale(0.96); }

.flash {
  width: min(680px, calc(100% - 32px));
  margin: 18px auto 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 11px 14px;
  background: var(--surface);
}

.flash.success { border-color: color-mix(in srgb, var(--success) 40%, var(--line)); color: var(--success); }
.flash.error { border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); color: var(--danger); }
.flash.info { color: var(--text-secondary); }

.auth-shell {
  display: grid;
  min-height: calc(100vh - 142px);
  place-items: center;
  padding: 52px 16px;
}

.auth-card {
  width: min(440px, 100%);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  padding: clamp(26px, 6vw, 38px);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
p { margin-top: 0; }

h1 {
  margin-bottom: 10px;
  font: 720 clamp(1.8rem, 5vw, 2.35rem)/1.08 var(--font-display);
  letter-spacing: -0.04em;
}

h2 {
  margin-bottom: 5px;
  font: 680 1.2rem/1.25 var(--font-display);
  letter-spacing: -0.02em;
}

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

.form-stack {
  display: grid;
  gap: 17px;
  margin-top: 26px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 650;
}

label small {
  color: var(--text-tertiary);
  font-size: 0.7rem;
  font-weight: 450;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: 9px 12px;
  background: var(--surface-soft);
  color: var(--text);
  outline: none;
  transition: border-color var(--motion), box-shadow var(--motion), background var(--motion);
}

input:hover,
select:hover,
textarea:hover { border-color: var(--text-tertiary); }

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent);
}

textarea { resize: vertical; }

.card-key-input {
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--radius-control);
  padding: 10px 16px;
  font-weight: 680;
  text-decoration: none;
  cursor: pointer;
  transition: border-color var(--motion), background var(--motion), color var(--motion), transform var(--motion);
}

.button:active { transform: scale(0.98); }

.button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--on-accent);
}

.button.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.button.secondary {
  border-color: var(--line-strong);
  background: var(--surface);
  color: var(--text);
}

.button.secondary:hover { border-color: var(--accent); color: var(--accent); }

.button.compact { min-height: 40px; padding: 8px 13px; }

.text-button {
  border-color: transparent;
  background: transparent;
  color: var(--text-secondary);
}

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

.button-row,
.account-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin-top: 24px;
}

.form-foot {
  margin: 22px 0 0;
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-align: center;
}

.form-foot a { font-weight: 650; text-underline-offset: 3px; }

.form-error {
  margin: 20px 0 0;
  border: 1px solid color-mix(in srgb, var(--danger) 34%, var(--line));
  border-radius: var(--radius-control);
  padding: 10px 12px;
  background: var(--danger-soft);
  color: var(--danger);
}

.status-orb {
  position: relative;
  width: 54px;
  height: 54px;
  margin-bottom: 22px;
  border: 1px solid color-mix(in srgb, currentColor 28%, transparent);
  border-radius: 50%;
  background: color-mix(in srgb, currentColor 10%, var(--surface));
  color: var(--warning);
}

.status-orb span {
  position: absolute;
  inset: 17px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 0 7px color-mix(in srgb, currentColor 12%, transparent);
}

.status-orb.active { color: var(--success); }

.check-list {
  display: grid;
  gap: 9px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: flex;
  align-items: center;
  gap: 9px;
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

.check-list .ok { color: var(--success); }
.check-list .bad { color: var(--danger); }

.success-panel {
  margin: 22px 0;
  border: 1px solid color-mix(in srgb, var(--success) 32%, var(--line));
  border-radius: var(--radius-control);
  padding: 14px;
  background: var(--success-soft);
  color: var(--success);
}

.success-panel p { margin: 5px 0 0; }

.account-shell {
  width: min(760px, calc(100% - 32px));
  min-height: calc(100vh - 156px);
  margin: 0 auto;
  padding: 64px 0;
}

.account-hero {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  padding: 10px 4px 32px;
}

.account-hero .status-orb { margin: 0; }

.account-details {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-card);
  padding: 24px;
  background: var(--surface);
}

.account-details dl { margin: 0; }

.account-details dl > div {
  display: grid;
  grid-template-columns: 130px minmax(0, 1fr);
  gap: 16px;
  border-bottom: 1px solid var(--line);
  padding: 14px 0;
}

.account-details dl > div:last-child { border-bottom: 0; }
.account-details dt { color: var(--text-tertiary); }
.account-details dd { margin: 0; font-weight: 650; }

.status-chip {
  display: inline-flex;
  min-height: 26px;
  align-items: center;
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 0.7rem;
  font-weight: 700;
  white-space: nowrap;
}

.status-chip.enabled { background: var(--success-soft); color: var(--success); }
.status-chip.used { background: var(--warning-soft); color: var(--warning); }
.status-chip.disabled { background: var(--surface-sunken); color: var(--text-tertiary); }

.admin-shell {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100vh - 160px);
  margin: 0 auto;
  padding: 42px 0 64px;
}

.admin-heading,
.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.admin-heading { margin-bottom: 24px; }
.admin-heading h1 { margin-bottom: 5px; }
.admin-heading p,
.panel-heading p { margin-bottom: 0; }

.admin-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.admin-stat {
  display: grid;
  gap: 3px;
  min-height: 82px;
  align-content: center;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
  padding: 13px 15px;
  background: var(--surface);
}

.admin-stat strong {
  color: var(--text-primary);
  font-size: clamp(1.25rem, 2.8vw, 1.7rem);
  line-height: 1;
  letter-spacing: -0.035em;
}

.admin-stat span {
  color: var(--text-tertiary);
  font-size: 0.72rem;
  font-weight: 650;
}

.admin-tabs {
  display: inline-flex;
  gap: 3px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-control);
  padding: 3px;
  background: var(--surface-soft);
}

.admin-tabs a {
  min-height: 40px;
  border-radius: 6px;
  padding: 9px 14px;
  color: var(--text-secondary);
  font-weight: 650;
  text-decoration: none;
}

.admin-tabs a.active {
  background: var(--surface);
  color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.admin-panel {
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 22px;
  background: var(--surface);
}

.inline-form,
.filter-form {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: flex-end;
  gap: 8px;
}

.inline-form label { width: 96px; }
.filter-form input { width: min(240px, 46vw); }
.filter-form select { width: 122px; }

.generated-cards {
  margin-top: 20px;
  border: 1px solid color-mix(in srgb, var(--success) 32%, var(--line));
  border-radius: var(--radius-control);
  padding: 14px;
  background: var(--success-soft);
}

.generated-cards > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--success);
}

.generated-card-actions {
  display: inline-flex;
  align-items: center;
  gap: 2px;
}

.generated-cards textarea {
  margin-top: 10px;
  background: var(--surface);
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
}

.copy-button,
.table-action {
  min-height: 36px;
  border: 0;
  padding: 6px 8px;
  background: transparent;
  color: var(--accent);
  font-weight: 680;
  text-decoration: none;
  cursor: pointer;
}

.copy-button:hover,
.table-action:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }

.link-form {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(280px, 1.8fr);
  gap: 14px;
  margin-top: 18px;
}

.link-form .checkbox-label,
.link-form .button-row { grid-column: 1 / -1; }

.checkbox-label {
  display: flex;
  min-height: 40px;
  align-items: center;
  gap: 9px;
}

.checkbox-label input { width: 18px; min-height: 18px; accent-color: var(--accent); }

.data-table {
  overflow: hidden;
  margin-top: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-control);
}

.table-row {
  display: grid;
  grid-template-columns: 90px 110px minmax(120px, 1fr) 170px 90px;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding: 11px 13px;
}

.links-table .table-row {
  grid-template-columns: 112px minmax(150px, 0.8fr) minmax(240px, 1.4fr) 92px 120px;
}

.members-table .table-row {
  grid-template-columns: 92px minmax(140px, 1fr) 100px 110px 180px;
}

.table-row:last-child { border-bottom: 0; }
.table-head { background: var(--surface-soft); color: var(--text-tertiary); font-size: 0.72rem; font-weight: 700; }
.table-row > span { min-width: 0; }
.table-row small { display: block; margin-top: 2px; color: var(--text-tertiary); font-size: 0.65rem; }
.url-cell { overflow: hidden; color: var(--text-secondary); font-family: ui-monospace, "SFMono-Regular", Consolas, monospace; font-size: 0.72rem; text-overflow: ellipsis; white-space: nowrap; }
.table-actions { display: flex; align-items: center; gap: 2px; }
.table-actions form { margin: 0; }

.empty-state {
  margin: 0;
  padding: 44px 16px;
  color: var(--text-tertiary);
  text-align: center;
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin-top: 18px;
  color: var(--text-secondary);
}

.site-footer {
  display: flex;
  width: min(1180px, calc(100% - 32px));
  min-height: 70px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 0 auto;
  border-top: 1px solid var(--line);
  color: var(--text-tertiary);
  font-size: 0.72rem;
}

@media (max-width: 760px) {
  .brand,
  .theme-toggle,
  .admin-tabs a,
  .inline-form .button,
  .link-form .button,
  .filter-form .button,
  .table-action {
    min-height: 44px;
  }

  .theme-toggle { width: 44px; }

  .site-header {
    width: calc(100% - 20px);
    min-height: 66px;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 8px;
  }

  .brand-en,
  .brand i { display: none; }
  .site-nav { order: 3; grid-column: 1 / -1; overflow-x: auto; border-top: 1px solid var(--line); }
  .site-nav a { min-width: max-content; min-height: 44px; }
  .auth-shell { min-height: auto; padding: 34px 12px; }
  .auth-card { padding: 26px 22px; }
  .account-shell { width: calc(100% - 24px); padding: 34px 0 46px; }
  .account-hero { grid-template-columns: 1fr; gap: 18px; }
  .account-details { padding: 16px; }
  .account-details dl > div { grid-template-columns: 1fr; gap: 4px; }
  .account-actions { display: grid; }
  .admin-shell { width: calc(100% - 20px); padding: 28px 0 44px; }
  .admin-heading,
  .panel-heading { align-items: stretch; flex-direction: column; gap: 14px; }
  .admin-heading form { align-self: flex-start; }
  .admin-tabs { display: flex; }
  .admin-tabs a { flex: 1; text-align: center; }
  .admin-stats { grid-template-columns: 1fr 1fr; }
  .admin-stat { min-height: 72px; padding: 11px 13px; }
  .admin-panel { padding: 16px 12px; }
  .inline-form,
  .filter-form { display: grid; grid-template-columns: 1fr 1fr; justify-content: stretch; }
  .inline-form label,
  .filter-form input,
  .filter-form select { width: 100%; }
  .inline-form .button,
  .filter-form .button { align-self: end; }
  .link-form { grid-template-columns: 1fr; }
  .link-form .checkbox-label,
  .link-form .button-row { grid-column: 1; }
  .data-table { overflow: visible; border: 0; }
  .table-row.table-head { display: none; }
  .table-row,
  .links-table .table-row,
  .members-table .table-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 9px;
    margin-bottom: 10px;
    border: 1px solid var(--line);
    border-radius: var(--radius-control);
    padding: 13px;
  }
  .data-table .table-row.table-head { display: none; }
  .table-row > span {
    display: grid;
    grid-template-columns: 104px minmax(0, 1fr);
    gap: 10px;
  }
  .table-row > span::before {
    content: attr(data-label);
    color: var(--text-tertiary);
    font-size: 0.7rem;
    font-weight: 650;
  }
  .url-cell { white-space: normal; overflow-wrap: anywhere; }
  .table-actions { justify-content: start; }
  .pagination { justify-content: space-between; }
}

@media (max-width: 480px) {
  .filter-form { grid-template-columns: 1fr; }
  .filter-form .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@media (prefers-contrast: more) {
  :root { --line: #8c949e; --line-strong: #68727e; }
  .site-header { backdrop-filter: none; background: var(--canvas); }
}