:root {
  --bg: #f7f8fa;
  --panel: #ffffff;
  --border: #d9dde5;
  --text: #1f2937;
  --subtle: #5b6473;
  --accent: #0b6bcb;
  --danger: #bb2d3b;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", Avenir, "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(135deg, #edf3fb 0%, #f8f9fc 100%);
}

.app {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 16px 40px;
}

header h1 {
  margin: 0;
  font-size: 40px;
  letter-spacing: 0.2px;
}

header p {
  margin: 6px 0 20px;
  color: var(--subtle);
}

.brand {
  display: flex;
  align-items: center;
  gap: 16px;
}

.brand-logo {
  width: 96px;
  height: 96px;
  object-fit: contain;
  border-radius: 12px;
  background: #ffffff;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-bottom: 14px;
}

.panel h2 {
  margin: 0 0 10px;
  font-size: 18px;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 8px;
}

.between {
  justify-content: space-between;
  align-items: center;
}

input,
select,
button {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
}

input,
select {
  background: #fff;
}

button {
  border: 0;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
}

.secondary-btn {
  background: #6b7280;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.rule-form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 8px;
  margin-bottom: 10px;
}

.rule-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rule-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  background: #fbfcff;
}

.rule-item small {
  color: var(--subtle);
  display: block;
}

.delete-btn {
  background: var(--danger);
}

.hint {
  color: var(--subtle);
  margin: 0;
}

.hidden {
  display: none;
}

.card-grid {
  margin-top: 10px;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 12px;
}

.tool-card {
  text-align: left;
  padding: 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f8fbff;
  color: var(--text);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tool-card span {
  color: var(--subtle);
  font-size: 14px;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
}

th,
td {
  padding: 9px;
  border: 1px solid var(--border);
  text-align: left;
  font-size: 14px;
  vertical-align: top;
}

th {
  background: #f3f6fb;
}

@media (max-width: 640px) {
  .brand {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .brand-logo {
    width: 78px;
    height: 78px;
  }

  header h1 {
    font-size: 30px;
  }

  .rule-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}