:root {
  --primary: #1e40af;
  --primary-dark: #1e3a8a;
  --secondary: #0891b2;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --border: #e2e8f0;
  --shadow: 0 1px 3px rgba(0,0,0,.05);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --surface: #111b30;
    --text: #e2e8f0;
    --muted: #94a3b8;
    --border: #1f2a44;
    --primary: #3b82f6;
  }
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, system-ui, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-weight: 700; color: var(--primary); text-decoration: none; font-size: 17px; }
.nav-links { display: flex; gap: 14px; font-size: 14px; }
.nav-links a { color: var(--text); text-decoration: none; }
.nav-links a:hover { color: var(--primary); }
.container { max-width: 720px; margin: 0 auto; padding: 14px; }
.hero { text-align: center; padding: 28px 12px; }
.hero h1 { font-size: 28px; color: var(--primary); margin-bottom: 8px; }
.slogan { color: var(--muted); margin-bottom: 22px; }
.cta { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; max-width: 420px; margin: 0 auto; }
.btn {
  display: block;
  padding: 14px;
  border-radius: 10px;
  text-align: center;
  text-decoration: none;
  font-weight: 600;
  transition: transform .05s;
}
.btn:active { transform: scale(.98); }
.btn.primary { background: var(--primary); color: #fff; }
.btn.secondary { background: var(--secondary); color: #fff; }
.card {
  background: var(--surface);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 12px;
  box-shadow: var(--shadow);
}
.card h2 { font-size: 16px; margin-bottom: 8px; color: var(--text); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: 13px; }
ul { padding-left: 18px; }
footer {
  text-align: center;
  padding: 24px 14px;
  border-top: 1px solid var(--border);
  margin-top: 24px;
  font-size: 13px;
  color: var(--muted);
}
@media (min-width: 720px) {
  .cta { grid-template-columns: repeat(2, 200px); }
}

/* nav extras */
.nav-links a.nav-cta { color: var(--primary); font-weight: 600; }
.inline-form { display: inline; margin: 0; padding: 0; }
.link-btn {
  background: none; border: none; padding: 0;
  font: inherit; color: var(--muted); cursor: pointer;
}
.link-btn:hover { color: var(--primary); }

/* forms */
.form-card { max-width: 420px; margin: 24px auto; }
.form-card label {
  display: block; margin-bottom: 12px; font-size: 14px; color: var(--muted);
}
.form-card input {
  display: block; width: 100%;
  padding: 10px 12px; margin-top: 4px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit;
}
.form-card input:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(30,64,175,.15);
}
.form-card input:disabled { color: var(--muted); cursor: not-allowed; }
.btn.block { display: block; width: 100%; border: none; cursor: pointer; font-size: 15px; }

.alert { padding: 10px 12px; border-radius: 8px; margin-bottom: 12px; font-size: 14px; }
.alert.error { background: #fef2f2; color: #991b1b; border: 1px solid #fecaca; }
.alert.ok    { background: #ecfdf5; color: #065f46; border: 1px solid #a7f3d0; }
@media (prefers-color-scheme: dark) {
  .alert.error { background: #2a1414; color: #fca5a5; border-color: #5b1f1f; }
  .alert.ok    { background: #0f2419; color: #6ee7b7; border-color: #1f4934; }
}

.kv { display: grid; grid-template-columns: 80px 1fr; gap: 6px 14px; font-size: 14px; }
.kv dt { color: var(--muted); }
.kv dd { color: var(--text); margin: 0; }

/* page head */
.page-head { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin: 14px 0 6px; }
.page-head h2 { margin-right: auto; }

/* request cards (lobby + detail) */
.req-card { display: block; text-decoration: none; color: inherit; }
.req-card:hover { box-shadow: 0 2px 10px rgba(0,0,0,.08); }
.req-head { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 6px; }
.req-title { font-size: 16px; flex: 1; color: var(--text); margin: 0; }
.bounty {
  background: var(--primary); color: #fff;
  border-radius: 999px; padding: 2px 10px;
  font-size: 13px; font-weight: 700; white-space: nowrap;
}
.meta { color: var(--text); font-size: 14px; }
.meta > * { margin-right: 4px; }
.meta-foot { margin-top: 6px; display: flex; gap: 6px; flex-wrap: wrap; }

/* status badges */
.status-open, .status-claimed, .status-awaiting_confirm,
.status-completed, .status-closed, .status-expired {
  display: inline-block; padding: 1px 8px; border-radius: 4px;
  font-size: 12px; font-weight: 600;
}
.status-open            { background: #dbeafe; color: #1e40af; }
.status-claimed         { background: #fef3c7; color: #92400e; }
.status-awaiting_confirm{ background: #fde68a; color: #78350f; }
.status-completed       { background: #d1fae5; color: #065f46; }
.status-closed          { background: #e5e7eb; color: #4b5563; }
.status-expired         { background: #fee2e2; color: #991b1b; }
@media (prefers-color-scheme: dark) {
  .status-open            { background: #1e3a5f; color: #93c5fd; }
  .status-claimed         { background: #4a3520; color: #fbbf24; }
  .status-awaiting_confirm{ background: #5a3818; color: #fbbf24; }
  .status-completed       { background: #1a3d2a; color: #6ee7b7; }
  .status-closed          { background: #2a2f3a; color: #cbd5e1; }
  .status-expired         { background: #4a1f1f; color: #fca5a5; }
}

/* bounty radio group */
.form-wide { max-width: 540px; }
.form-card textarea {
  display: block; width: 100%;
  padding: 10px 12px; margin-top: 4px;
  background: var(--bg); color: var(--text);
  border: 1px solid var(--border); border-radius: 8px;
  font-size: 15px; font-family: inherit; resize: vertical;
}
.bounty-set { border: none; padding: 0; margin: 0 0 14px; }
.bounty-set legend { font-size: 14px; color: var(--muted); margin-bottom: 6px; }
.bounty-options { display: flex; gap: 8px; flex-wrap: wrap; }
.bounty-opt {
  flex: 1; min-width: 64px; margin: 0;
  cursor: pointer;
}
.bounty-opt input { position: absolute; opacity: 0; pointer-events: none; }
.bounty-opt span {
  display: block; text-align: center;
  padding: 10px 6px; border: 1px solid var(--border); border-radius: 8px;
  background: var(--surface); color: var(--text);
  font-weight: 600; font-size: 15px;
  transition: all .1s;
}
.bounty-opt input:checked + span {
  background: var(--primary); color: #fff; border-color: var(--primary);
}

/* personal center extras */
.action-row { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 14px; }
.action-row .btn { padding: 9px 14px; font-size: 14px; }
.action-row button[disabled] { opacity: .55; cursor: default; }
.my-list { list-style: none; padding: 0; }
.my-list li {
  display: flex; gap: 10px; align-items: center;
  padding: 8px 0; border-bottom: 1px solid var(--border);
}
.my-list li:last-child { border-bottom: none; }
.my-list a { color: var(--text); text-decoration: none; flex: 1; }
.my-list a:hover { color: var(--primary); }
.tx-list { list-style: none; padding: 0; }
.tx-list li {
  display: flex; gap: 10px; align-items: center;
  padding: 6px 0; font-size: 14px;
}
.tx-delta { font-weight: 700; min-width: 48px; }
.tx-delta.plus  { color: #16a34a; }
.tx-delta.minus { color: #dc2626; }
.tx-reason { flex: 1; color: var(--text); }

/* activity feed */
.activity-list { list-style: none; padding: 0; }
.activity-list li {
  padding: 6px 0; font-size: 14px;
  border-bottom: 1px dashed var(--border);
}
.activity-list li:last-child { border-bottom: none; }
.activity-list .actor { color: var(--primary); font-weight: 600; margin-right: 4px; }
.activity-list .obj   { color: var(--text); }

/* file input */
.form-card input[type="file"] {
  padding: 8px;
  font-size: 13px;
}
.form-card input[type="file"]::-webkit-file-upload-button,
.form-card input[type="file"]::file-selector-button {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  margin-right: 10px;
  cursor: pointer;
  font: inherit;
}

/* details (reject reason dropdown) */
details summary { outline: none; }
details summary::-webkit-details-marker { color: var(--muted); }
details[open] summary { margin-bottom: 4px; }

/* pager */
.pager {
  display: flex; justify-content: center; gap: 16px; align-items: center;
  padding: 20px 0; font-size: 14px;
}
.pager a { color: var(--primary); text-decoration: none; }