:root {
  --bg: #f6f7f8;
  --card-bg: #ffffff;
  --text: #1f2933;
  --muted: #6b7280;
  --accent: #2563eb;
  --tag-bg: #eef2ff;
  --border: #e5e7eb;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 2.5rem 1.5rem;
  line-height: 1.5;
}

header {
  max-width: 760px;
  margin: 0 auto 2.5rem;
}

h1 {
  font-size: 1.8rem;
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

header p {
  color: var(--muted);
  margin-top: 0.25rem;
}

input {
  width: 100%;
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  font-size: 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: #fff;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

main {
  max-width: 760px;
  margin: 0 auto;
}

/* Card */

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin-bottom: 1rem;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.card:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
  transform: translateY(-1px);
}

/* Details / Summary */

details {
  padding: 0.75rem 1rem;
}

summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 0.75rem;
}

summary::-webkit-details-marker {
  display: none;
}

summary strong {
  font-size: 1.05rem;
}

/* Tags */

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tags span {
  font-size: 0.75rem;
  background: var(--tag-bg);
  color: #3730a3;
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

/* Expanded content */

.summary {
  margin-top: 0.75rem;
  color: var(--muted);
  font-style: italic;
}

.details,
.notes {
  margin-top: 0.75rem;
}

.notes strong {
  color: var(--text);
}

/* States */

.empty,
.loading {
  text-align: center;
  color: var(--muted);
  padding: 2rem 0;
}

/* Accessibility & motion */

@media (prefers-reduced-motion: reduce) {
  .card,
  input {
    transition: none;
  }
}

.search-group {
  display: grid;
  gap: 0.75rem;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.5rem;
}

.details br,
.summary br,
.notes br {
  display: block;
  margin-bottom: 0.35rem;
}

.logic-connector {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  padding: 0.5rem 0;
}

.logic-connector label {
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}

.logic-connector select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;

  padding: 0.45rem 1.75rem 0.45rem 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.04em;

  border-radius: 999px;
  border: 1px solid var(--border);
  background-color: #fff;
  color: var(--text);

  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 14px) calc(50% - 2px),
    calc(100% - 9px) calc(50% - 2px);
  background-size: 5px 5px;
  background-repeat: no-repeat;

  cursor: pointer;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.logic-connector select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.logic-help {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;

  width: 18px;
  height: 18px;
  font-size: 0.75rem;
  font-weight: 600;

  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: help;
  user-select: none;
}

.info-icon:hover,
.info-icon:focus {
  color: var(--text);
  border-color: var(--accent);
}

.tooltip {
  position: absolute;
  top: 130%;
  right: 0;

  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.6rem 0.75rem;

  font-size: 0.75rem;
  line-height: 1.4;
  white-space: nowrap;

  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.08);

  opacity: 0;
  pointer-events: none;
  transform: translateY(-4px);
  transition: opacity 0.15s ease, transform 0.15s ease;
}

.logic-help:hover .tooltip,
.logic-help:focus-within .tooltip {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.result-count {
  max-width: 760px;
  margin: 0 auto 0.75rem;
  font-size: 0.85rem;
  color: var(--muted);
}


.tag {
  font-size: 0.75rem;
  background: var(--tag-bg);
  color: #3730a3;
  padding: 0.25rem 0.55rem;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.tag:hover {
  background: #e0e7ff;
}

.tag:focus {
  outline: none;
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.3);
}