:root {
  --bg: #f5f7f8;
  --panel: #fff;
  --ink: #17202e;
  --muted: #667387;
  --line: #dfe5ec;
  --brand: #176d64;
  --danger: #b73333;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

.page {
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  width: min(460px, 100%);
  margin: 0 auto;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  box-shadow: 0 12px 28px rgba(20, 30, 44, .1);
}

.login-card h1,
.login-card h2,
.panel h2 {
  margin: 0 0 8px;
  letter-spacing: 0;
}

.login-card p {
  margin: 0 0 18px;
  color: var(--muted);
  line-height: 1.7;
}

.login-form {
  display: grid;
  gap: 12px;
}

.top {
  width: min(900px, 100%);
  margin: 0 auto 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.top h1 {
  margin: 0 0 8px;
  font-size: 30px;
  letter-spacing: 0;
}

.top p {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  box-shadow: 0 12px 28px rgba(20, 30, 44, .1);
}

.tool-grid {
  width: min(1100px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 16px;
  align-items: start;
}

.query-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  align-items: end;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 13px;
}

input, button {
  min-height: 42px;
  border-radius: 6px;
  font: inherit;
}

input {
  border: 1px solid var(--line);
  padding: 8px 10px;
}

button {
  border: 1px solid var(--brand);
  background: var(--brand);
  color: #fff;
  padding: 0 18px;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: .7;
}

button.ghost,
.secondary {
  background: #fff;
  color: var(--brand);
}

.scan-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
}

.file-button {
  min-height: 42px;
  border: 1px solid var(--brand);
  border-radius: 6px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--brand);
  font-size: 14px;
}

.file-button input {
  display: none;
}

.scanner {
  width: 100%;
  max-height: 280px;
  margin-top: 12px;
  border-radius: 8px;
  border: 1px solid var(--line);
  object-fit: cover;
  background: #111827;
}

.hint {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 13px;
}

.message, .result {
  margin-top: 16px;
  border-radius: 8px;
  padding: 14px;
}

.error {
  background: #fff0f0;
  color: var(--danger);
  border: 1px solid #f1c7c7;
}

.success {
  background: #eef8f4;
  color: var(--brand);
  border: 1px solid #c8e5dc;
}

.hidden {
  display: none !important;
}

.result.yes {
  background: #eef8f4;
  border: 1px solid #c8e5dc;
}

.result.no {
  background: #fff8e8;
  border: 1px solid #efd69d;
}

.result strong {
  display: block;
  font-size: 24px;
  margin-bottom: 6px;
}

dl {
  display: grid;
  grid-template-columns: 110px 1fr;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

dt, dd {
  margin: 0;
  padding: 11px 12px;
  border-bottom: 1px solid var(--line);
}

dt { background: #f7f9fb; color: var(--muted); }

.date-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}

.stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 14px 0;
}

.stats div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f7fbfa;
}

.stats span {
  display: block;
  font-size: 28px;
  font-weight: 700;
  color: var(--brand);
}

.stats small {
  color: var(--muted);
}

.stats-panel h3 {
  margin: 16px 0 8px;
  font-size: 16px;
}

.log-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}

.log-list li {
  display: grid;
  gap: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
}

.log-list span,
.log-list time {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 860px) {
  .tool-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .query-form, .date-form { grid-template-columns: 1fr; }
  .page { padding: 14px; }
  .top { align-items: flex-start; }
}