/* ============================================================
   rete-lab.css — «Costruisci la tua rete» (Milestone 1)
   Topologia + livello 2: PC/Switch/Router, cavi, ping stessa
   subnet con ARP e tabella MAC. Prefisso .rl-  ·  base.css + lab.css.
   ============================================================ */

.rl-sec { position: relative; z-index: 2; }

/* ---------- Toolbar ---------- */
.rl-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem 1.3rem; }
/* gruppi logici: restano interi e vanno a capo come blocco, senza spezzature strane */
.rl-tgroup { display: inline-flex; align-items: center; flex-wrap: wrap; gap: 0.4rem; }
.rl-tgroup + .rl-tgroup { padding-left: 1.3rem; border-left: 1px solid var(--line-soft); }
@media (max-width: 620px) { .rl-tgroup + .rl-tgroup { padding-left: 0; border-left: 0; } }
.rl-tool {
  display: inline-flex; align-items: center; gap: 0.4rem; white-space: nowrap;
  font-family: var(--font-sans); font-size: 0.86rem; font-weight: 500;
  padding: 0.5rem 0.8rem; border: 1px solid var(--line); border-radius: 100px;
  background: var(--bg); color: var(--ink); cursor: pointer;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease), background-color 0.18s var(--ease);
}
.rl-tool:hover { border-color: var(--accent); color: var(--accent); }
.rl-tool.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.rl-tool svg { width: 16px; height: 16px; flex: 0 0 auto; }
.rl-tool-label { font-family: var(--font-mono); font-size: 0.72rem; color: var(--ink-soft); white-space: nowrap; }
.rl-select {
  font-family: var(--font-mono); font-size: 0.82rem; padding: 0.45rem 0.7rem; max-width: 14rem; min-width: 0;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink); cursor: pointer;
}
.rl-speed { display: inline-flex; align-items: center; gap: 0.45rem; }
.rl-speed input { vertical-align: middle; accent-color: var(--accent); max-width: 6rem; }
.rl-status {
  font-family: var(--font-mono); font-size: 0.78rem; color: var(--accent);
  padding: 0.3rem 0.2rem; min-height: 1.2rem; flex-basis: 100%;
}
@media (max-width: 620px) {
  .rl-toolbar { gap: 0.4rem 0.5rem; }
  .rl-tgroup { gap: 0.3rem; width: 100%; }
  .rl-tool { padding: 0.4rem 0.6rem; font-size: 0.8rem; gap: 0.3rem; }
  .rl-tool svg { width: 15px; height: 15px; }
  .rl-select { flex: 1; max-width: none; }
}

/* ---------- Layout: tela a tutta larghezza, impostazioni + spiegazione sotto ---------- */
.rl-bottom { display: grid; grid-template-columns: minmax(0, 360px) minmax(0, 1fr); gap: 1.1rem; align-items: start; margin-top: 1.1rem; }
@media (max-width: 760px) { .rl-bottom { grid-template-columns: 1fr; } }

/* ---------- Tela ---------- */
.rl-stage-wrap { margin-top: 1.1rem; border: 1px solid var(--line); border-radius: 14px; background: var(--bg-sunk);
  background-image: radial-gradient(var(--line-soft) 1px, transparent 1px); background-size: 22px 22px;
  overflow: auto; height: clamp(420px, 64vh, 640px); }
/* area logica grande e scorrevole: si trascina lo sfondo per spostarsi (pan) */
.rl-stage { display: block; width: 1100px; height: 700px; touch-action: none; cursor: grab; }
.rl-stage.panning { cursor: grabbing; }

.rl-link { fill: none; stroke: var(--ink-faint); stroke-width: 2.5; }
.rl-link.wireless { stroke-dasharray: 5 5; stroke: var(--accent); }
.rl-link-hit { fill: none; stroke: transparent; stroke-width: 18; pointer-events: stroke; cursor: pointer; }
.rl-link-hit:hover + .rl-link { stroke: #e0533d; stroke-width: 3.5; }
.rl-link.active { stroke: var(--accent); stroke-width: 3.5; }

.rl-portlbl { font-family: var(--font-mono); font-size: 9px; fill: var(--ink-faint); }

.rl-dev { cursor: grab; }
.rl-dev.dragging { cursor: grabbing; }
.rl-dev-box { fill: var(--bg-elev); stroke: var(--line); stroke-width: 1.5; rx: 12; transition: stroke 0.15s var(--ease); }
.rl-dev:hover .rl-dev-box { stroke: var(--accent); }
.rl-dev.sel .rl-dev-box { stroke: var(--accent); stroke-width: 2.5; }
.rl-dev.pingsrc .rl-dev-box { stroke: #3fae6b; stroke-width: 2.5; }
.rl-dev-icon { stroke: var(--ink); fill: none; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.rl-dev.sel .rl-dev-icon, .rl-dev:hover .rl-dev-icon { stroke: var(--accent); }
.rl-dev-name { font-family: var(--font-display); font-weight: 500; font-size: 13px; fill: var(--ink); text-anchor: middle; }
.rl-dev-ip { font-family: var(--font-mono); font-size: 10.5px; fill: var(--ink-soft); text-anchor: middle; }
.rl-dev-ip.none { fill: #c98a1b; }
.rl-dev.flowing .rl-dev-box { stroke: var(--accent); stroke-width: 3; }

.rl-del { cursor: pointer; }
.rl-del circle { fill: #e0533d; }
.rl-del text { fill: #fff; font-family: var(--font-sans); font-size: 13px; font-weight: 700; text-anchor: middle; dominant-baseline: central; }

.rl-packet { fill: var(--accent); stroke: var(--accent-ink); stroke-width: 1.5; }
.rl-packet.reply { fill: #3fae6b; }

/* ---------- Pannello laterale ---------- */
.rl-side { display: flex; flex-direction: column; gap: 1rem; }
.rl-side-empty { text-align: center; color: var(--ink-soft); padding: 1.5rem 0.5rem; }
.rl-side-empty .ico { font-size: 2rem; }
.rl-empty-ico { color: var(--ink-faint); }
.rl-side-empty p { font-size: 0.9rem; line-height: 1.5; margin-top: 0.6rem; }

.rl-panel-head { display: flex; align-items: center; gap: 0.6rem; margin-bottom: 0.9rem; }
.rl-panel-head h2 { font-family: var(--font-display); font-weight: 500; font-size: 1.2rem; }
.rl-tabs { display: inline-flex; padding: 3px; border: 1px solid var(--line); border-radius: 100px; background: var(--bg); margin-bottom: 1rem; }
.rl-tab { font-family: var(--font-mono); font-size: 0.74rem; padding: 0.35rem 0.7rem; border: 0; border-radius: 100px; background: transparent; color: var(--ink-soft); cursor: pointer; }
.rl-tab.active { background: var(--accent); color: var(--accent-ink); }

.rl-field { margin-bottom: 0.8rem; }
.rl-field label { display: block; font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--ink-soft); margin-bottom: 0.35rem; }
.rl-field input {
  width: 100%; min-width: 0; box-sizing: border-box; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--ink);
  font-family: var(--font-mono); font-size: 0.92rem; padding: 0.5rem 0.65rem; outline: none;
  transition: border-color 0.15s var(--ease), box-shadow 0.15s var(--ease);
}
.rl-field input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-wash); }
.rl-field input.invalid { border-color: #e0533d; }
.rl-field .err { font-family: var(--font-mono); font-size: 0.68rem; color: #e0533d; min-height: 0.85rem; margin-top: 0.2rem; }
.rl-field-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.6rem; }
.rl-field-row > .rl-field { min-width: 0; }

.rl-table { width: 100%; border-collapse: collapse; font-family: var(--font-mono); font-size: 0.76rem; }
.rl-table th, .rl-table td { text-align: left; padding: 0.4rem 0.5rem; border-bottom: 1px solid var(--line-soft); }
.rl-table th { color: var(--ink-faint); font-weight: 600; text-transform: uppercase; font-size: 0.66rem; letter-spacing: 0.04em; }
.rl-table .empty { color: var(--ink-faint); font-style: italic; }
.rl-route-form { display: grid; gap: 0.5rem; }

.rl-del-btn { margin-top: 0.6rem; }

/* ---------- Log ---------- */
.rl-log-panel { margin-top: 1rem; }
.rl-log-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-bottom: 0.7rem; }
.rl-log-head h2 { font-family: var(--font-display); font-weight: 500; font-size: 1.15rem; }
.rl-banner { padding: 0.7rem 0.9rem; border-radius: 10px; font-family: var(--font-mono); font-size: 0.86rem; margin-bottom: 0.8rem; display: none; }
.rl-banner.show { display: block; }
.rl-banner.ok { background: color-mix(in srgb, #3fae6b 14%, transparent); border: 1px solid color-mix(in srgb, #3fae6b 50%, transparent); color: #2e8c55; }
.rl-banner.err { background: color-mix(in srgb, #e0533d 14%, transparent); border: 1px solid color-mix(in srgb, #e0533d 50%, transparent); color: #c0392b; }
.rl-log { font-family: var(--font-mono); font-size: 0.82rem; line-height: 1.5; max-height: 230px; overflow-y: auto;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg-sunk); padding: 0.7rem 0.9rem; }
.rl-log .step { padding: 0.18rem 0; border-bottom: 1px dashed var(--line-soft); color: var(--ink-soft); }
.rl-log .step:last-child { border-bottom: 0; }
.rl-log .step .who { color: var(--accent); font-weight: 600; }
.rl-log .step.arp .who { color: #b9711d; }
[data-theme="dark"] .rl-log .step.arp .who { color: #e6a44e; }
.rl-log .step.fail { color: #c0392b; }
.rl-log .step b { color: var(--ink); }
.rl-log-empty { color: var(--ink-faint); }

/* ---------- Aiuto sotto la tela ---------- */
.rl-hint { margin-top: 0.7rem; font-family: var(--font-mono); font-size: 0.74rem; color: var(--ink-faint); line-height: 1.5; }
.rl-hint b { color: #e0533d; }

/* ---------- Popup di configurazione del dispositivo ---------- */
.rl-modal-overlay {
  position: fixed; inset: 0; z-index: 80;
  background: rgba(0, 0, 0, 0.45);
  display: flex; align-items: center; justify-content: center;
  padding: 1rem;
}
.rl-modal { position: relative; width: min(30rem, 100%); max-height: 88vh; overflow: auto; }
.rl-modal .panel { margin: 0; }
.rl-modal-close {
  position: absolute; top: 0.7rem; right: 0.7rem; z-index: 3;
  width: 30px; height: 30px; border-radius: 50%;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink-soft);
  font-size: 1.15rem; line-height: 1; cursor: pointer; display: grid; place-items: center;
}
.rl-modal-close:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Etichette delle interfacce sui cavi ---------- */
.rl-port-lbl rect { fill: var(--bg); stroke: var(--line); stroke-width: 1; }
.rl-port-lbl text {
  font-family: var(--font-mono); font-size: 9px; fill: var(--ink-soft);
  text-anchor: middle; dominant-baseline: central;
}

/* riga «porta → vicino» nelle interfacce del router */
.rl-iflabel { font-family: var(--font-mono); font-size: 0.78rem; margin: 0.6rem 0 0.2rem; color: var(--ink-soft); }
.rl-iflabel b { color: var(--ink); }
.rl-if-ok { color: #2f9e57; }
.rl-if-off { color: var(--ink-faint); }