/* ============================================================
   regex.css — Espressioni regolari (regex)
   Usa base.css + lab.css (token, .panel, .control-label, ecc.).
   ============================================================ */

.rx-sec { position: relative; z-index: 2; }
.rx-panel { display: grid; gap: 1.1rem; }

/* ---------- Riga pattern + flag ---------- */
.rx-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: stretch;
}
.rx-field {
  flex: 1 1 320px;
  display: flex;
  align-items: center;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.rx-field:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.rx-field.invalid { border-color: #e0533d; }
.rx-field.invalid:focus-within { box-shadow: 0 0 0 3px rgba(224, 83, 61, 0.18); }
.rx-slash {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  color: var(--ink-faint);
  padding-inline: 0.55rem;
  user-select: none;
}
.rx-flagsview { color: var(--accent); }
.rx-field input {
  flex: 1;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 1.02rem;
  padding: 0.7rem 0.1rem;
  outline: none;
}

.rx-flags { display: inline-flex; gap: 0.35rem; }
.rx-flag {
  width: 2.2rem;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--bg);
  color: var(--ink-soft);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background-color 0.2s var(--ease);
}
.rx-flag:hover { border-color: var(--accent); color: var(--accent); }
.rx-flag.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.rx-error {
  min-height: 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: #e0533d;
  margin: 0;
}

/* ---------- Esempi ---------- */
.rx-examples { display: flex; align-items: center; flex-wrap: wrap; gap: 0.5rem 0.7rem; }
.rx-ex-list { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.rx-ex {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: var(--bg);
  color: var(--ink);
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.rx-ex:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Testo e risultato ---------- */
.rx-sublabel {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
}
.rx-sublabel-row { display: flex; align-items: baseline; justify-content: space-between; gap: 0.75rem; }
.rx-count { font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-faint); }
.rx-count strong { color: var(--accent); font-weight: 600; }

.rx-text, .rx-output {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  line-height: 1.6;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-sunk);
  padding: 0.8rem 0.9rem;
}
.rx-text {
  width: 100%;
  color: var(--ink);
  resize: vertical;
  outline: none;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  margin-top: -0.4rem;
}
.rx-text:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.rx-output {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  color: var(--ink-soft);
  min-height: 2.6rem;
  margin-top: -0.4rem;
}
.rx-output mark.rx-hit {
  background: var(--accent);
  color: var(--accent-ink);
  border-radius: 3px;
  padding: 0 1px;
}
.rx-output .rx-nohit { color: var(--ink-faint); font-style: italic; }

/* ---------- Elenco corrispondenze ---------- */
.rx-matches { display: grid; gap: 0.5rem; }
.rx-match {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: var(--bg);
}
.rx-match-n { color: var(--ink-faint); }
.rx-match-txt { color: var(--ink); background: var(--accent-wash); border-radius: 4px; padding: 0 0.3rem; }
.rx-groups { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-left: auto; }
.rx-group { color: var(--ink-soft); }
.rx-group b { color: var(--accent); font-weight: 600; }

/* ---------- Ripasso simboli ---------- */
.rx-cheat {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr));
  gap: 1.1rem 1.5rem;
}
.rx-cheat-group h3 {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
}
.rx-tokens { display: flex; flex-direction: column; gap: 0.4rem; }
.rx-token {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: baseline;
  gap: 0.6rem;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 0.25rem 0.3rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.15s var(--ease);
}
.rx-token:hover { background: var(--bg-sunk); }
.rx-token code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--accent);
  background: var(--accent-wash);
  border-radius: 5px;
  padding: 0.1rem 0.4rem;
  white-space: nowrap;
}
.rx-token small { color: var(--ink-soft); font-size: 0.82rem; line-height: 1.35; }

/* ---------- Sfide ---------- */
.rx-chals { display: grid; gap: 1.1rem; }
.rx-chal {
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--bg);
  padding: 1.1rem 1.15rem;
  transition: border-color 0.25s var(--ease);
}
.rx-chal.solved { border-color: color-mix(in srgb, #3fae6b 55%, var(--line)); }
.rx-chal-head { display: flex; align-items: baseline; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 0.3rem; }
.rx-chal-n {
  font-family: var(--font-mono); font-size: 0.72rem;
  color: var(--accent-ink); background: var(--accent);
  border-radius: 100px; padding: 0.1rem 0.5rem;
}
.rx-chal.solved .rx-chal-n { background: #3fae6b; }
.rx-chal-title { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; letter-spacing: -0.01em; }
.rx-chal-task { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 0.8rem; }

.rx-chal-field {
  display: flex; align-items: center;
  border: 1px solid var(--line); border-radius: 9px; background: var(--bg-sunk);
  margin-bottom: 0.85rem;
}
.rx-chal-field:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.rx-chal-field .rx-slash { font-size: 0.95rem; }
.rx-chal-field input {
  flex: 1; min-width: 0; border: 0; background: transparent; color: var(--ink);
  font-family: var(--font-mono); font-size: 0.95rem; padding: 0.6rem 0.2rem; outline: none;
}

.rx-cases { display: flex; flex-wrap: wrap; gap: 0.9rem 1.6rem; }
.rx-caseset { display: grid; gap: 0.3rem; }
.rx-caseset-lab { font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ink-faint); }
.rx-case {
  display: flex; align-items: center; gap: 0.45rem;
  font-family: var(--font-mono); font-size: 0.84rem; color: var(--ink-soft);
}
.rx-case .rx-dot { width: 15px; text-align: center; font-weight: 700; }
.rx-case.ok .rx-dot { color: #3fae6b; }
.rx-case.bad .rx-dot { color: #e0533d; }
.rx-case samp { color: var(--ink); }

.rx-chal-foot { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; margin-top: 0.9rem; }
.rx-chal-msg { font-family: var(--font-mono); font-size: 0.8rem; color: #3fae6b; }
.rx-chal-msg.hidden { display: none; }
.rx-sol { font-family: var(--font-mono); font-size: 0.8rem; color: var(--ink-soft); }
.rx-sol code { color: var(--accent); background: var(--accent-wash); border-radius: 5px; padding: 0.05rem 0.4rem; }

@media (max-width: 560px) {
  .rx-flags { flex: 1 1 100%; justify-content: space-between; }
  .rx-flag { flex: 1; }
  .rx-groups { margin-left: 0; flex-basis: 100%; }
}