/**
 * Styles for the Regex Lab playground.
 */

.regex-tool {
  --tool-ink: #2c3e50;
  --tool-teal: #1abc9c;
  --mark: #ffe08a;
}

.regex-tool .page-section {
  background:
    radial-gradient(circle at 80% 0%, rgba(44, 62, 80, 0.08), transparent 40%),
    linear-gradient(180deg, #f7f8f9 0%, #fff 55%, #f4f8f7 100%);
}

.tool-intro {
  max-width: 42rem;
  margin: 0 auto 2rem;
  text-align: center;
  color: #495057;
  font-size: 1.05rem;
  line-height: 1.6;
}

.regex-layout {
  display: grid;
  gap: 1.25rem;
  max-width: 72rem;
  margin: 0 auto;
}

@media (min-width: 960px) {
  .regex-layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }
}

.regex-panel {
  background: #fff;
  border: 1px solid rgba(44, 62, 80, 0.1);
  border-radius: 0.55rem;
  box-shadow: 0 10px 28px rgba(44, 62, 80, 0.07);
  padding: 1.25rem;
}

.regex-panel h2 {
  margin: 0 0 0.9rem;
  font-family: "Montserrat", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tool-ink);
}

.regex-field {
  margin-bottom: 0.9rem;
}

.regex-field label {
  display: block;
  margin-bottom: 0.4rem;
  font-family: "Montserrat", sans-serif;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--tool-ink);
}

.regex-field input[type="text"],
.regex-field textarea {
  width: 100%;
  border: 2px solid rgba(44, 62, 80, 0.16);
  border-radius: 0.4rem;
  padding: 0.7rem 0.85rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.95rem;
  color: var(--tool-ink);
  background: #fbfcfd;
}

.regex-field textarea {
  min-height: 8.5rem;
  resize: vertical;
  line-height: 1.5;
}

.regex-field input:focus,
.regex-field textarea:focus {
  outline: none;
  border-color: var(--tool-teal);
  box-shadow: 0 0 0 3px rgba(26, 188, 156, 0.18);
}

.regex-flags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  margin-bottom: 0.9rem;
}

.regex-flags label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: "Montserrat", sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--tool-ink);
  cursor: pointer;
}

.regex-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.regex-presets button {
  appearance: none;
  border: 2px solid var(--tool-ink);
  background: transparent;
  color: var(--tool-ink);
  font-family: "Montserrat", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  cursor: pointer;
}

.regex-presets button:hover,
.regex-presets button:focus-visible {
  background: var(--tool-teal);
  border-color: var(--tool-teal);
  color: #fff;
  outline: none;
}

.regex-error {
  margin: 0.75rem 0 0;
  padding: 0.65rem 0.75rem;
  border-radius: 0.35rem;
  background: #fdedec;
  color: #922b21;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.85rem;
}

.regex-highlight {
  min-height: 8.5rem;
  border: 2px solid rgba(44, 62, 80, 0.12);
  border-radius: 0.4rem;
  padding: 0.85rem;
  background: #1a252f;
  color: #f4f8f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.95rem;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}

.regex-mark {
  background: var(--mark);
  color: #1a252f;
  border-radius: 0.15rem;
  padding: 0 0.1rem;
}

.regex-match-row {
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(44, 62, 80, 0.1);
}

.regex-match-row:last-child {
  border-bottom: none;
}

.regex-match-index {
  font-family: "Montserrat", sans-serif;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #6c757d;
  margin-bottom: 0.25rem;
}

.regex-match-text {
  display: inline-block;
  background: #f4f8f7;
  border-radius: 0.25rem;
  padding: 0.2rem 0.4rem;
  color: var(--tool-ink);
  font-size: 0.92rem;
}

.regex-groups {
  margin-top: 0.45rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.regex-groups code {
  background: #eef7f4;
  color: #16a085;
  border-radius: 0.25rem;
  padding: 0.15rem 0.4rem;
  font-size: 0.8rem;
}

.regex-empty {
  margin: 0;
  color: #6c757d;
}