:root {
  --bg: #07111f;
  --bg-elevated: rgba(10, 23, 40, 0.86);
  --bg-soft: rgba(18, 34, 55, 0.78);
  --line: rgba(144, 188, 255, 0.2);
  --line-strong: rgba(144, 188, 255, 0.38);
  --text: #edf4ff;
  --muted: #9fb6d4;
  --accent: #5ec8ff;
  --accent-strong: #23e2c3;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  --radius: 22px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(36, 151, 255, 0.18), transparent 28%),
    radial-gradient(circle at top right, rgba(35, 226, 195, 0.12), transparent 22%),
    linear-gradient(180deg, #08111f 0%, #0a1423 45%, #07111f 100%);
  color: var(--text);
  font-family: "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

body {
  padding: 24px;
}

.app-shell {
  max-width: 1920px;
  margin: 0 auto;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.hero h1 {
  margin: 8px 0 12px;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.05;
}

.eyebrow,
.card-kicker {
  margin: 0;
  color: var(--accent-strong);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
}

.hero-text {
  margin: 0;
  max-width: 780px;
  color: var(--muted);
  line-height: 1.7;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: flex-end;
}

.meta-chip,
.step-badge,
.protocol-index,
.param-chip {
  border: 1px solid var(--line-strong);
  background: rgba(11, 24, 41, 0.72);
  color: var(--text);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.92rem;
  backdrop-filter: blur(10px);
}

.dashboard {
  display: grid;
  grid-template-columns: minmax(980px, 1.58fr) minmax(340px, 0.58fr) minmax(360px, 0.82fr);
  grid-template-areas:
    "scene control protocol"
    "data data data";
  gap: 20px;
  align-items: stretch;
}

.card {
  background: var(--bg-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
  overflow: hidden;
}

.card-head {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: flex-start;
  padding: 22px 24px 0;
}

.card-head h2 {
  margin: 6px 0 0;
  font-size: 1.35rem;
}

.scene-card {
  grid-area: scene;
}

.protocol-card {
  grid-area: protocol;
}

.data-card {
  grid-area: data;
}

.control-card {
  grid-area: control;
}


.scene-card,
.protocol-card,
.control-card {
  min-height: 100%;
}

.protocol-card,
.control-card {
  display: flex;
  flex-direction: column;
}

.protocol-body,
.control-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px 24px 24px;
  flex: 1;
  min-height: 0;
}

.protocol-section,
.control-section {
  margin: 0;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.protocol-section-grow {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.protocol-section-grow .timeline-list {
  overflow: auto;
  padding-right: 6px;
}

.control-section h3 {
  margin: 0 0 14px;
  font-size: 0.98rem;
}

.control-section .message-banner {
  margin-bottom: 14px;
}

.control-section .params-form {
  background: transparent;
  border: 0;
  padding: 0;
}
.scene-stage {
  display: grid;
  gap: 14px;
  padding: 22px 24px 24px;
}

.topology-shell {
  position: relative;
}

.canvas-host {
  width: 100%;
  height: 452px;
  border-radius: 20px;
  background:
    radial-gradient(circle at 20% 20%, rgba(42, 127, 194, 0.16), transparent 26%),
    linear-gradient(180deg, rgba(13, 28, 45, 0.92), rgba(9, 19, 33, 0.98));
  border: 1px solid rgba(114, 164, 224, 0.16);
  overflow: hidden;
}

.label-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.scene-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  align-items: flex-end;
  padding: 18px 20px;
  z-index: 3;
}

.scene-overlay-stack {
  display: grid;
  gap: 10px;
}

.scene-callout {
  width: fit-content;
  max-width: min(540px, 90%);
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(7, 14, 25, 0.76);
  border: 1px solid rgba(94, 200, 255, 0.28);
  color: var(--accent-strong);
  font-size: 0.9rem;
  line-height: 1.4;
}

.scene-note {
  max-width: min(540px, 90%);
  padding: 14px 18px;
  border-radius: 16px;
  background: rgba(7, 14, 25, 0.72);
  border: 1px solid rgba(135, 184, 255, 0.2);
  line-height: 1.6;
}

.device-band {
  position: relative;
  min-height: 236px;
  border-radius: 18px;
  border: 1px solid rgba(117, 174, 255, 0.2);
  background:
    linear-gradient(180deg, rgba(10, 22, 37, 0.92), rgba(8, 18, 30, 0.98)),
    radial-gradient(circle at top, rgba(94, 200, 255, 0.08), transparent 55%);
  overflow: hidden;
  padding: 44px 18px 18px;
}

.device-band::before {
  content: '设备说明带';
  position: absolute;
  left: 16px;
  top: 10px;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--accent-strong);
  text-transform: uppercase;
}

.device-band::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  top: 34px;
  border-top: 1px dashed rgba(117, 174, 255, 0.16);
}

.node-label {
  position: absolute;
  transform: translate(-50%, -120%);
  min-width: 110px;
  padding: 8px 10px;
  border-radius: 14px;
  background: rgba(7, 18, 33, 0.88);
  border: 1px solid rgba(117, 174, 255, 0.3);
  text-align: center;
  color: var(--text);
  font-size: 0.82rem;
  line-height: 1.35;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.24);
}

.node-label strong {
  display: block;
  font-size: 0.88rem;
}

.is-hidden {
  display: none;
}

.decision-float,
.packet-card {
  position: absolute;
  min-width: 174px;
  max-width: 228px;
  padding: 10px 12px;
  min-height: 148px;
  border-radius: 16px;
  background: rgba(7, 18, 33, 0.92);
  border: 1px solid rgba(117, 174, 255, 0.3);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.28);
  color: var(--text);
  line-height: 1.45;
  transform: translate(-50%, -50%);
}

.decision-float {
  backdrop-filter: blur(10px);
}

.device-band .decision-float {
  top: 18px;
  transform: translate(-50%, 0);
}

.device-band .packet-card {
  display: none !important;
}

.decision-float h4,
.packet-card h4 {
  margin: 0 0 8px;
  font-size: 0.92rem;
}

.decision-grid,
.packet-card ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 6px;
}

.decision-grid li,
.packet-card li {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 8px;
  font-size: 0.82rem;
}

.decision-grid strong,
.packet-card strong {
  color: var(--muted);
  font-weight: 600;
}

.decision-grid span,
.packet-card span {
  display: block;
  word-break: break-word;
}

.packet-card {
  min-width: 184px;
  border-color: rgba(35, 226, 195, 0.26);
}

.packet-card.is-compact {
  min-width: 156px;
}

.packet-card.is-processing {
  border-color: rgba(255, 179, 71, 0.35);
}

.packet-card.is-delivered {
  border-color: rgba(35, 226, 195, 0.35);
}

.decision-float-switch {
  max-width: 196px;
}

.decision-float-router {
  max-width: 204px;
}

.decision-float-host {
  max-width: 196px;
}

.packet-card.is-arp {
  border-color: rgba(255, 141, 91, 0.42);
}


.scene-legend {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  justify-content: flex-end;
  pointer-events: none;
  z-index: 4;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 6px 9px;
  border-radius: 999px;
  background: rgba(7, 18, 33, 0.82);
  border: 1px solid rgba(117, 174, 255, 0.22);
  font-size: 0.74rem;
  color: var(--muted);
}

.legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  display: inline-block;
}

.legend-mac {
  background: #ffd166;
}

.legend-ip {
  background: #4da3ff;
}

.legend-data {
  background: #23e2c3;
}

.legend-arp {
  background: #ff8d5b;
}
.data-card {
  padding-bottom: 24px;
}

.protocol-section h3,
.data-box h3 {
  margin: 0 0 12px;
  font-size: 1rem;
}

.protocol-section p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.logic-list,
.timeline-list {
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
}

.logic-list li,
.timeline-list li {
  line-height: 1.65;
  margin-bottom: 8px;
}

.timeline-list li.is-active {
  color: var(--text);
}

.timeline-list li.is-complete {
  color: var(--accent-strong);
}

.param-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  padding: 20px 24px 0;
}

.param-chip {
  border-radius: 16px;
  font-size: 0.88rem;
}

.data-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 20px 24px 0;
}

.data-layout > .data-box:first-child {
  grid-column: 1 / -1;
}

.data-box {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
}

.frame-view {
  display: grid;
  gap: 12px;
}

.frame-group {
  background: rgba(8, 18, 31, 0.72);
  border: 1px solid rgba(120, 171, 245, 0.16);
  border-radius: 14px;
  padding: 12px 14px;
}

.frame-group-compact {
  min-height: 100%;
}

.frame-group-compact h4 {
  margin: 0 0 6px;
  font-size: 0.82rem;
  color: var(--accent-strong);
}

.frame-group h4 {
  margin: 0 0 8px;
  font-size: 0.92rem;
}

.frame-group dl {
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 7px 10px;
  margin: 0;
}

.frame-group dt {
  color: var(--muted);
}

.frame-group dd {
  margin: 0;
  word-break: break-all;
}

.message-banner {
  border-radius: 16px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 180, 84, 0.34);
  background: rgba(65, 42, 13, 0.42);
  color: #ffd79a;
  line-height: 1.6;
}

.button-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.action-btn-wide-mobile {
  grid-column: auto;
}

.action-btn {
  appearance: none;
  border: 1px solid rgba(115, 176, 255, 0.22);
  background: rgba(15, 28, 46, 0.94);
  color: var(--text);
  border-radius: 14px;
  padding: 14px 16px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

.action-btn:hover {
  transform: translateY(-1px);
  border-color: rgba(117, 187, 255, 0.45);
  background: rgba(18, 37, 58, 0.98);
}

.action-btn-primary {
  background: linear-gradient(135deg, #0f7cff, #19c8d8);
  border-color: transparent;
}

.action-btn-wide {
  width: 100%;
}

.params-form {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--muted);
  font-size: 0.88rem;
}

.field input,
.field select {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(125, 176, 246, 0.18);
  background: rgba(6, 14, 26, 0.9);
  color: var(--text);
  padding: 12px 13px;
  font-size: 0.95rem;
}

.field input:focus,
.field select:focus,
.action-btn:focus {
  outline: 2px solid rgba(94, 200, 255, 0.38);
  outline-offset: 2px;
}

.table-wrap {
  overflow-x: auto;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.data-table th,
.data-table td {
  border-bottom: 1px solid rgba(118, 174, 245, 0.12);
  padding: 10px 8px;
  text-align: left;
}

.data-table th {
  color: var(--muted);
  font-weight: 600;
}

.data-table tr.is-highlight td {
  color: var(--accent-strong);
}

.placeholder {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
}

.button-row .action-btn-wide-mobile {
  grid-column: 1 / -1;
}

@media (max-width: 1480px) {
  .dashboard {
    grid-template-columns: 1fr;
    grid-template-areas:
      "scene"
      "control"
      "protocol"
      "data";
  }

  .canvas-host {
    height: 440px;
  }
}

  .canvas-host {
    height: 440px;
  }
}

  
.scene-card,
.protocol-card,
.control-card {
  min-height: 100%;
}

.protocol-card,
.control-card {
  display: flex;
  flex-direction: column;
}

.protocol-body,
.control-stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 20px 24px 24px;
  flex: 1;
  min-height: 0;
}

.protocol-section,
.control-section {
  margin: 0;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.protocol-section-grow {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.protocol-section-grow .timeline-list {
  overflow: auto;
  padding-right: 6px;
}

.control-section h3 {
  margin: 0 0 14px;
  font-size: 0.98rem;
}

.control-section .message-banner {
  margin-bottom: 14px;
}

.control-section .params-form {
  background: transparent;
  border: 0;
  padding: 0;
}
.scene-stage {
  display: grid;
  gap: 14px;
  padding: 22px 24px 24px;
}

.topology-shell {
  position: relative;
}

.canvas-host {
    height: 440px;
  }
}

@media (max-width: 760px) {
  body {
    padding: 16px;
  }

  .hero {
    flex-direction: column;
  }

  .hero-meta {
    justify-content: flex-start;
  }

  .card-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .protocol-body,
  .control-stack {
    padding: 18px;
  }

  .data-layout,
  .field-grid,
  .button-row,

  .data-layout > .data-box:first-child {
    grid-column: auto;
  }

  .action-btn-wide-mobile {
    grid-column: auto;
  }

  .canvas-host {
    height: 340px;
  }

  .decision-float,
  .packet-card {
    max-width: min(220px, 72vw);
  }
}