:root {
  color-scheme: dark;
  --bg: #0a0f14;
  --panel: rgba(15, 24, 34, 0.94);
  --panel-strong: #172230;
  --line: rgba(162, 183, 201, 0.16);
  --border: rgba(162, 183, 201, 0.18);
  --text: #edf3f8;
  --muted: #a7b6c5;
  --accent: #f08c5a;
  --accent-2: #58c4b6;
  --accent-3: #83b5ff;
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.32);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: "Space Grotesk", sans-serif;
  background:
    radial-gradient(circle at top, rgba(88, 196, 182, 0.08), transparent 32%),
    linear-gradient(180deg, #091017 0%, var(--bg) 48%, #060a0e 100%);
  color: var(--text);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 82%);
  opacity: 0.18;
}

h1,
h2,
h3 {
  font-family: "Syne", sans-serif;
}

code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.architecture-page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 2rem 0 4.5rem;
}

.hero-panel,
.overview-card,
.diagram-card,
.details-panel {
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.025), rgba(255, 255, 255, 0.01)),
    var(--panel);
}

.hero-panel {
  padding: 32px;
  border-radius: 22px;
}

.eyebrow,
.overview-kicker {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.74rem;
  color: var(--accent-2);
}

.hero-panel h1,
.section-heading h2,
.details-panel h2 {
  margin: 0;
  line-height: 1.05;
}

.hero-panel h1 {
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  max-width: 12ch;
  letter-spacing: -0.05em;
}

.hero-copy,
.overview-card p,
.details-panel p,
.detail-list li {
  color: var(--muted);
  line-height: 1.7;
}

.hero-copy {
  max-width: 760px;
  margin: 18px 0 0;
  font-size: 1.05rem;
}

.overview-section,
.architecture-shell {
  margin-top: 36px;
}

.section-heading {
  margin-bottom: 20px;
}

.section-heading .eyebrow {
  margin-bottom: 8px;
}

.section-heading h2 {
  font-size: clamp(1.5rem, 3vw, 2.4rem);
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.overview-card {
  border-radius: 22px;
  padding: 22px;
}

.overview-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

.overview-card p {
  margin: 0;
}

.architecture-layout {
  display: grid;
  grid-template-columns: minmax(0, 980px) minmax(320px, 0.8fr);
  gap: 22px;
  align-items: start;
}

.diagram-card,
.details-panel {
  border-radius: 22px;
}

.diagram-card {
  padding: 18px;
  width: 100%;
  max-width: 980px;
}

.diagram-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 14px;
}

.diagram-toolbar p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.reset-button {
  border: 1px solid rgba(162, 183, 201, 0.28);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
  cursor: pointer;
  font: inherit;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.reset-button:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(162, 183, 201, 0.38);
  transform: translateY(-1px);
}

.diagram-viewport {
  position: relative;
  overflow: hidden;
  min-height: 520px;
  max-height: 520px;
  border-radius: 22px;
  border: 1px solid rgba(162, 183, 201, 0.14);
  background:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, rgba(9, 16, 23, 0.96), rgba(11, 19, 27, 0.94));
  background-size: 36px 36px, 36px 36px, auto;
  cursor: grab;
  touch-action: none;
}

.diagram-viewport.dragging {
  cursor: grabbing;
}

.diagram-stage {
  position: relative;
  width: 1280px;
  height: 920px;
  transform-origin: 0 0;
  transition: transform 360ms ease;
}

.diagram-lines {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.diagram-lines path {
  fill: none;
  stroke: var(--line);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
  marker-end: url(#arrowHead);
}

.diagram-lines marker path {
  fill: rgba(140, 186, 214, 0.8);
}

.flow-line.request-line {
  stroke: #83b5ff;
}

.flow-line.app-line {
  stroke: #7ef0c4;
}

.flow-line.data-line {
  stroke: #f4bf75;
}

.node {
  position: absolute;
  width: 190px;
  padding: 16px 18px;
  border-radius: 18px;
  border: 1px solid rgba(191, 219, 235, 0.18);
  background: rgba(12, 26, 38, 0.96);
  color: var(--text);
  text-align: left;
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.24);
}

button.node {
  cursor: pointer;
  font: inherit;
  transition:
    transform 180ms ease,
    border-color 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease;
}

button.node:hover,
button.node:focus-visible {
  outline: none;
  transform: translateY(-2px);
  border-color: rgba(191, 219, 235, 0.34);
}

button.node.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(126, 240, 196, 0.35), 0 18px 38px rgba(0, 0, 0, 0.3);
  background: rgba(16, 36, 48, 0.98);
}

.node-label,
.node-meta,
.node-copy {
  display: block;
}

.node-label {
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.35;
}

.node-meta {
  margin-top: 6px;
  font-size: 0.83rem;
  color: var(--muted);
  line-height: 1.45;
}

.node-copy {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.55;
}

.node-copy span {
  display: block;
}

.node-subpoint {
  padding-left: 14px;
}

.node-user {
  width: 146px;
  background: rgba(25, 43, 63, 0.98);
  border-color: rgba(131, 181, 255, 0.34);
}

.node-edge {
  width: 144px;
  background: rgba(21, 47, 62, 0.98);
  border-color: rgba(131, 181, 255, 0.34);
}

.node-network {
  width: 224px;
  background: rgba(26, 50, 70, 0.98);
  border-color: rgba(131, 181, 255, 0.34);
}

.node-hosting {
  width: 214px;
  background: rgba(17, 43, 39, 0.98);
  border-color: rgba(126, 240, 196, 0.34);
}

.node-frontend {
  width: 256px;
  background: rgba(17, 39, 50, 0.98);
  border-color: rgba(126, 240, 196, 0.34);
}

.node-backend {
  width: 292px;
  background: rgba(18, 46, 49, 0.98);
  border-color: rgba(126, 240, 196, 0.34);
}

.node-data {
  width: 268px;
  background: rgba(61, 48, 21, 0.98);
  border-color: rgba(244, 191, 117, 0.34);
}

.node-pipeline {
  width: 312px;
  background: rgba(66, 46, 24, 0.98);
  border-color: rgba(244, 191, 117, 0.34);
}

.node-host {
  width: 238px;
  background: rgba(19, 29, 46, 0.9);
  border-color: rgba(131, 181, 255, 0.3);
}

.host-shell {
  position: absolute;
  left: 128px;
  top: 286px;
  width: 1060px;
  height: 462px;
  border: 2px solid rgba(131, 181, 255, 0.22);
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(16, 28, 42, 0.28), rgba(9, 19, 29, 0.2));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 12px 28px rgba(0, 0, 0, 0.16);
}

.route-label {
  position: absolute;
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-label-request {
  left: 54px;
  top: 58px;
  color: #dcebff;
  background: rgba(131, 181, 255, 0.18);
  border: 1px solid rgba(131, 181, 255, 0.28);
}

.route-label-server {
  left: 166px;
  top: 304px;
  color: #dffcf2;
  background: rgba(126, 240, 196, 0.14);
  border: 1px solid rgba(126, 240, 196, 0.28);
}

.route-label-data {
  left: 168px;
  top: 710px;
  color: #fff0d8;
  background: rgba(244, 191, 117, 0.14);
  border: 1px solid rgba(244, 191, 117, 0.28);
}

.flow-caption {
  position: absolute;
  color: rgba(151, 173, 188, 0.82);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.details-panel {
  padding: 26px;
  min-height: 660px;
}

.details-panel h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

.details-panel h3 {
  margin: 28px 0 10px;
  font-size: 0.92rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.details-panel p {
  margin: 14px 0 0;
}

.detail-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.detail-tag {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
  font-size: 0.85rem;
}

.detail-list {
  padding-left: 18px;
  margin: 12px 0 0;
}

.detail-list li + li {
  margin-top: 10px;
}

.overview-list {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.overview-item {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.overview-item strong {
  display: block;
  margin-bottom: 4px;
}

@media (max-width: 1120px) {
  .overview-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .architecture-layout {
    grid-template-columns: 1fr;
  }

  .diagram-card {
    max-width: none;
  }

  .details-panel {
    min-height: unset;
  }
}

@media (max-width: 720px) {
  .architecture-page {
    width: min(100% - 24px, 1280px);
    padding: 24px 0 40px;
  }

  .hero-panel,
  .overview-card,
  .diagram-card,
  .details-panel {
    border-radius: 22px;
  }

  .overview-grid {
    grid-template-columns: 1fr;
  }

  .diagram-toolbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .diagram-viewport {
    min-height: 460px;
    max-height: 460px;
  }
}