:root {
  --bg: #0b1220;
  --bg-elev: #131c2f;
  --bg-card: #182236;
  --border: #243149;
  --border-strong: #38507a;
  --text: #d6e2f3;
  --text-dim: #8aa0c0;
  --muted: #6b7a93;
  --accent: #4ad6c4;
  --accent-strong: #5cf2dc;
  --warn: #f7c873;
  --err: #ff7a8a;
  --ok: #6cf09a;
  --info: #82b8ff;
  --mono: ui-monospace, "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.mono { font-family: var(--mono); }
.muted { color: var(--muted); }

/* -------- Header -------- */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand h1 {
  font-size: 18px;
  margin: 0;
  letter-spacing: 0.5px;
  color: var(--accent);
}
.logo { font-size: 18px; }
.tagline {
  color: var(--text-dim);
  font-size: 12px;
}
.header-actions { display: flex; align-items: center; gap: 12px; }
.phase-indicator {
  font-family: var(--mono);
  font-size: 13px;
  padding: 4px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--accent);
}

/* -------- Layout -------- */
.layout {
  flex: 1;
  display: grid;
  grid-template-columns: 280px 1fr 320px;
  gap: 14px;
  padding: 14px;
  min-height: 0;
}

.panel {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  overflow-y: auto;
  box-shadow: var(--shadow);
}
.panel h2 { margin: 0 0 6px; font-size: 16px; color: var(--accent); }
.panel h3 { margin: 14px 0 8px; font-size: 13px; text-transform: uppercase; letter-spacing: 1px; color: var(--text-dim); }
.panel .block:first-child h3 { margin-top: 0; }

.topology-area {
  background:
    radial-gradient(circle at 30% 20%, rgba(74, 214, 196, 0.05), transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(130, 184, 255, 0.05), transparent 50%),
    var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow);
}
#topology {
  width: 100%;
  height: 100%;
  display: block;
}

/* -------- Objetivos -------- */
.objective-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.obj {
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 6px;
  background: var(--bg-card);
  margin-bottom: 6px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-dim);
}
.obj.passed {
  color: var(--ok);
  border-left-color: var(--ok);
  background: rgba(108, 240, 154, 0.07);
}

/* -------- Mapa de portas -------- */
.port-map { display: flex; flex-direction: column; gap: 10px; }
.port-map-group h4 {
  margin: 0 0 4px;
  font-size: 11px;
  letter-spacing: 0.8px;
  color: var(--accent);
  text-transform: uppercase;
}
.port-map-table {
  width: 100%;
  font-size: 12px;
  border-collapse: collapse;
}
.port-map-table td {
  padding: 2px 6px;
  color: var(--text-dim);
}
.port-map-table td:first-child {
  width: 60px;
  color: var(--text);
}
.port-map-table td.arrow {
  width: 18px;
  color: var(--muted);
  text-align: center;
}

/* -------- Hints -------- */
.hints-box { display: flex; flex-direction: column; gap: 6px; margin-bottom: 10px; }
.hint {
  font-size: 13px;
  padding: 8px 10px;
  background: rgba(247, 200, 115, 0.07);
  border-left: 3px solid var(--warn);
  border-radius: 4px;
}

/* -------- Config panel -------- */
.config-panel h3 { margin-top: 0; }
.field {
  display: grid;
  grid-template-columns: 90px 1fr;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.field-label {
  font-size: 12px;
  color: var(--text-dim);
}
.field input {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  font-family: var(--mono);
  width: 100%;
  outline: none;
  transition: border-color 0.15s, background 0.15s;
}
.field input:focus { border-color: var(--accent); background: #0a1322; }
.field input.locked {
  background: var(--bg-card);
  color: var(--text-dim);
  border-color: var(--border);
  cursor: not-allowed;
}
.vlan-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px 12px;
}
.vlan-grid .field {
  grid-template-columns: 60px 1fr;
  margin-bottom: 4px;
}
.iface-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 10px;
  margin-bottom: 10px;
}
.iface-wrap h4 {
  margin: 0 0 8px;
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 0.5px;
}

/* -------- Buttons -------- */
.btn {
  background: var(--bg-card);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 7px 14px;
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.05s;
}
.btn:hover:not(:disabled) { background: var(--border); }
.btn:active:not(:disabled) { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.full { width: 100%; }
.btn-primary { background: var(--accent); color: #08111c; border-color: var(--accent); font-weight: 600; }
.btn-primary:hover:not(:disabled) { background: var(--accent-strong); }
.btn-success { background: var(--ok); color: #08111c; border-color: var(--ok); font-weight: 600; }
.btn-success:hover:not(:disabled) { filter: brightness(1.1); }
.btn-secondary { background: var(--bg-card); border-color: var(--accent); color: var(--accent); }
.btn-ghost { background: transparent; }
.btn-tiny { padding: 2px 8px; font-size: 11px; }

/* -------- Footer / Controls -------- */
.app-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 10px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ping-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.select-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-dim);
}
.select {
  background: var(--bg);
  color: var(--text);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 13px;
  font-family: var(--mono);
}
.console-wrap {
  background: #060b15;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.console-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 4px 10px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  font-size: 11px;
  letter-spacing: 1px;
  color: var(--text-dim);
  text-transform: uppercase;
}
.console {
  height: 110px;
  overflow-y: auto;
  padding: 8px 10px;
  font-size: 12.5px;
  font-family: var(--mono);
}
.log-line { line-height: 1.5; white-space: pre-wrap; }
.log-info { color: var(--info); }
.log-cmd { color: var(--text); }
.log-ok { color: var(--ok); }
.log-err { color: var(--err); }
.log-warn { color: var(--warn); }
.log-win { color: var(--accent-strong); font-weight: 600; }

/* -------- SVG topology -------- */
.cable {
  stroke: #3a4a6a;
  stroke-width: 2.5;
  stroke-linecap: round;
}
.device-halo {
  fill: transparent;
  stroke: transparent;
  transition: stroke 0.15s, fill 0.15s;
}
.device:hover .device-halo {
  stroke: var(--border-strong);
  stroke-width: 1.5;
  stroke-dasharray: 4 3;
}
.device.selected .device-halo {
  stroke: var(--accent);
  stroke-width: 2;
  fill: rgba(74, 214, 196, 0.06);
}
.device-label {
  fill: var(--text);
  font-size: 13px;
  font-weight: 600;
  font-family: var(--mono);
}
.device-info {
  fill: var(--text-dim);
  font-size: 11px;
  font-family: var(--mono);
}
.device.incomplete .device-info { fill: var(--warn); }

.pc-monitor { fill: #1c2840; stroke: #4a6390; stroke-width: 1.5; }
.pc-screen { fill: #0c1426; stroke: var(--accent); stroke-width: 0.8; }
.device.incomplete .pc-screen { stroke: var(--warn); }
.pc-base { fill: #4a6390; }

.sw-body { fill: #2a3a5a; stroke: #5b7aaa; stroke-width: 1.5; }
.sw-port { fill: #0c1426; stroke: #6b86b3; stroke-width: 0.6; }
.icon-label {
  fill: #d6e2f3;
  font-size: 9px;
  font-family: var(--mono);
  letter-spacing: 1px;
  font-weight: 600;
}

.rt-body { fill: #3a2e5a; stroke: #8b76d6; stroke-width: 1.5; }
.rt-arrows { stroke: #d2c4ff; stroke-width: 2; fill: none; stroke-linecap: round; stroke-linejoin: round; }

.srv-body { fill: #1a3530; stroke: #4ad6c4; stroke-width: 1.5; }
.srv-slot { fill: #0c1c1a; stroke: #2a8a7c; stroke-width: 0.6; }
.srv-led { fill: var(--ok); }
.device.incomplete .srv-led { fill: var(--warn); }

.packet {
  fill: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent));
}
/* Ida: request padrão em ciano */
.packet-request {
  fill: var(--accent);
  filter: drop-shadow(0 0 8px var(--accent));
}
/* Volta de sucesso: bolha verde menor */
.packet-reply {
  fill: var(--ok);
  filter: drop-shadow(0 0 8px var(--ok));
  opacity: 0.9;
}
/* Volta de falha: bolha vermelha menor */
.packet-reply-fail {
  fill: var(--err);
  filter: drop-shadow(0 0 8px var(--err));
  opacity: 0.9;
}
/* Flash no endpoint */
.flash-success {
  fill: rgba(108, 240, 154, 0.3);
  stroke: var(--ok);
  stroke-width: 2.5;
  animation: pulse-ok 0.35s ease-out;
}
.flash-fail {
  fill: rgba(255, 122, 138, 0.3);
  stroke: var(--err);
  stroke-width: 2.5;
  animation: pulse-fail 0.4s ease-out;
}
@keyframes pulse-ok {
  0%   { r: 12; opacity: 1; }
  100% { r: 26; opacity: 0; }
}
@keyframes pulse-fail {
  0%   { r: 14; opacity: 1; }
  100% { r: 28; opacity: 0; }
}
/* Compat: legados — caem nos flashes equivalentes */
.packet-success { fill: var(--ok); filter: drop-shadow(0 0 10px var(--ok)); }
.packet-fail { fill: var(--err); filter: drop-shadow(0 0 10px var(--err)); }
.packet-fail-pulse {
  fill: rgba(255, 122, 138, 0.3);
  stroke: var(--err);
  stroke-width: 2;
  animation: pulse-fail 0.7s ease-out;
}

/* -------- Modal de vitória -------- */
.overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 12, 22, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  backdrop-filter: blur(4px);
}
.overlay.hidden { display: none; }
.modal {
  background: var(--bg-elev);
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 30px 36px;
  max-width: 480px;
  text-align: center;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 40px rgba(74, 214, 196, 0.15);
}
.modal h2 { margin: 0 0 12px; color: var(--accent); }
.modal-actions { display: flex; justify-content: center; gap: 10px; margin-top: 20px; }

/* -------- Welcome / Mascote -------- */
.welcome-overlay { backdrop-filter: blur(6px); }
.welcome-modal {
  max-width: 720px;
  padding: 24px 32px 28px;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 24px;
  align-items: center;
  text-align: left;
}
.welcome-modal .modal-actions {
  grid-column: 1 / -1;
  justify-content: flex-end;
  margin-top: 8px;
}
.welcome-art { display: flex; justify-content: center; }
.mascot { width: 100%; max-width: 220px; height: auto; filter: drop-shadow(0 4px 12px rgba(74,214,196,0.2)); }
.mascot .m-body { fill: #2a3a5a; stroke: #4ad6c4; stroke-width: 3; }
.mascot .m-led-green { fill: #6cf09a; }
.mascot .m-led-amber { fill: #f7c873; }
.mascot .m-port { fill: #0c1426; stroke: #6b86b3; stroke-width: 0.8; }
.mascot .m-eye-white { fill: #f0fbff; }
.mascot .m-eye-pupil { fill: #0c1426; }
.mascot .m-eye-glint { fill: #fff; }
.mascot .m-smile { stroke: #f0fbff; stroke-width: 2.5; fill: none; stroke-linecap: round; }
.mascot .m-blush { fill: rgba(255, 122, 138, 0.45); }
.mascot .m-cable-a { stroke: #82b8ff; stroke-width: 4; fill: none; stroke-linecap: round; }
.mascot .m-rj45-a { fill: #82b8ff; }
.mascot .m-cable-b { stroke: #ff7a8a; stroke-width: 4; fill: none; stroke-linecap: round; }
.mascot .m-rj45-b { fill: #ff7a8a; }
.mascot .m-foot { fill: #4a6390; }

.welcome-text h2 { margin: 0 0 10px; color: var(--accent); font-size: 22px; }
.welcome-text .brand-name { color: var(--accent-strong); }
.welcome-tag { margin: 0 0 12px; font-size: 14px; }
.welcome-list { margin: 0 0 12px; padding-left: 18px; font-size: 13.5px; }
.welcome-list li { margin-bottom: 6px; }
.welcome-foot { margin: 0; font-size: 12px; }

/* -------- Victory -------- */
.victory-modal { max-width: 540px; }
.trophy {
  font-size: 64px;
  line-height: 1;
  margin-bottom: 8px;
  animation: trophy-bounce 0.6s ease-in-out infinite alternate;
}
@keyframes trophy-bounce {
  from { transform: translateY(0) rotate(-5deg); }
  to   { transform: translateY(-8px) rotate(5deg); }
}

/* -------- Toast -------- */
.toast {
  position: fixed;
  top: 80px;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background: var(--bg-elev);
  border: 2px solid var(--accent);
  border-radius: 10px;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--accent-strong);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4), 0 0 24px rgba(74, 214, 196, 0.3);
  z-index: 200;
  opacity: 0;
  transition: opacity 0.25s, transform 0.25s;
  pointer-events: none;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}
.toast.hidden { display: none; }

/* -------- Confetti -------- */
.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 150;
}
.confetti-piece {
  position: absolute;
  width: 10px;
  height: 14px;
  top: -24px;
  border-radius: 1px;
  animation: confetti-fall var(--dur, 2s) linear forwards;
  will-change: transform, opacity;
}
.confetti-piece.shape-circle { border-radius: 50%; width: 10px; height: 10px; }
.confetti-piece.shape-strip { width: 4px; height: 16px; }
@keyframes confetti-fall {
  0%   { transform: translate(0, 0) rotate(0deg); opacity: 1; }
  100% { transform: translate(var(--drift, 0), 110vh) rotate(var(--spin, 720deg)); opacity: 0.85; }
}

/* -------- Responsivo -------- */
@media (max-width: 700px) {
  .welcome-modal { grid-template-columns: 1fr; text-align: center; }
  .welcome-art { max-width: 180px; margin: 0 auto; }
}

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 240px 1fr 280px;
  }
}
@media (max-width: 900px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
  }
  .panel { max-height: 220px; }
}