:root {
  --bg: #f4f0e8;
  --bg-alt: #e8dfd2;
  --panel: rgba(255, 250, 242, 0.82);
  --panel-border: rgba(71, 52, 28, 0.15);
  --text: #1d1a16;
  --muted: #65584a;
  --accent: #b55d2d;
  --accent-strong: #8b3c13;
  --accent-soft: #f2d7c5;
  --success: #256245;
  --warning: #a24f2a;
  --shadow: 0 22px 45px rgba(57, 40, 19, 0.12);
  --radius-lg: 26px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --rack-unit-height: 38px;
  --font-display: "Avenir Next", "Segoe UI", sans-serif;
  --font-body: "IBM Plex Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.75), transparent 26%),
    linear-gradient(160deg, var(--bg) 0%, #eadfce 52%, #efe7dc 100%);
  color: var(--text);
  font-family: var(--font-body);
}

button, input, select {
  font: inherit;
}

.app-shell {
  max-width: 1600px;
  margin: 0 auto;
  padding: 32px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) minmax(260px, 0.9fr);
  gap: 24px;
  margin-bottom: 24px;
}

.hero__copy,
.hero__meta,
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hero__copy {
  padding: 36px;
  border-radius: var(--radius-lg);
}

.hero__copy h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.eyebrow {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.82rem;
  color: var(--accent-strong);
}

.hero__lead {
  max-width: 60ch;
  color: var(--muted);
  font-size: 1.05rem;
}

.hero__meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 24px;
  border-radius: var(--radius-lg);
}

.meta-card {
  padding: 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.5);
}

.meta-card__label {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(420px, 1fr) minmax(320px, 390px);
  gap: 24px;
  align-items: start;
}

.panel {
  padding: 24px;
  border-radius: var(--radius-lg);
}

.panel__heading h2,
.subpanel__header h3 {
  margin: 0;
  font-family: var(--font-display);
}

.panel__heading p {
  margin: 6px 0 0;
  color: var(--muted);
}

.panel--controls,
.panel--sidebar {
  display: grid;
  gap: 18px;
}

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

.field span {
  font-size: 0.9rem;
  color: var(--muted);
}

.field input,
.field select,
.subpanel__header button {
  border: 1px solid rgba(83, 58, 31, 0.14);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.82);
  padding: 12px 14px;
}

.field input:focus,
.field select:focus {
  outline: 2px solid rgba(181, 93, 45, 0.24);
  outline-offset: 1px;
}

.library-toolbar {
  display: grid;
  gap: 14px;
}

.library {
  display: grid;
  gap: 12px;
  max-height: 780px;
  overflow: auto;
  padding-right: 4px;
}

.component-card,
.rack-item,
.subpanel,
.notice {
  border: 1px solid rgba(75, 57, 37, 0.12);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
}

.component-card {
  padding: 14px;
  display: grid;
  gap: 10px;
}

.component-card__preview {
  padding: 10px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(44, 47, 53, 0.08), rgba(18, 19, 23, 0.02));
}

.component-card__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.component-card__header strong {
  display: block;
}

.chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  padding: 5px 8px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
}

.component-card__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 0.84rem;
}

.component-card button,
.subpanel__header button,
.rack-item button {
  cursor: pointer;
  border: 0;
  background: var(--accent);
  color: #fff;
  border-radius: 12px;
  padding: 10px 12px;
}

.component-card button:hover,
.subpanel__header button:hover,
.rack-item button:hover {
  background: var(--accent-strong);
}

.rack-stage {
  display: grid;
  gap: 18px;
}

.rack-summary,
.stat-grid {
  display: grid;
  gap: 12px;
}

.rack-summary {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.summary-card,
.stat-card {
  padding: 16px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(75, 57, 37, 0.12);
}

.summary-card strong,
.stat-card strong {
  display: block;
  margin-top: 6px;
  font-size: 1.1rem;
}

.rack-grid {
  position: relative;
  border-radius: 28px;
  border: 2px solid rgba(42, 34, 24, 0.55);
  background:
    linear-gradient(90deg, rgba(9, 11, 15, 0.88), rgba(20, 25, 31, 0.15) 14%, rgba(20, 25, 31, 0.15) 86%, rgba(9, 11, 15, 0.88)),
    linear-gradient(180deg, #6e737b 0%, #3a3f48 12%, #15181d 22%, #0f1217 100%);
  padding: 24px 38px 24px 74px;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.18),
    inset 0 0 0 2px rgba(255, 255, 255, 0.04),
    0 24px 40px rgba(9, 11, 15, 0.22);
}

.rack-grid::before,
.rack-grid::after {
  content: "";
  position: absolute;
  top: 18px;
  bottom: 18px;
  width: 16px;
  border-radius: 6px;
  background:
    radial-gradient(circle at center 8px, rgba(205, 214, 229, 0.75) 0 2px, transparent 2.5px) center top / 100% 18px repeat-y,
    linear-gradient(180deg, #404550, #1a1d23);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    inset 0 0 12px rgba(0, 0, 0, 0.4);
}

.rack-grid::before {
  left: 26px;
}

.rack-grid::after {
  right: 26px;
}

.rack-slot {
  position: relative;
  height: var(--rack-unit-height);
  border-top: 1px solid rgba(202, 212, 222, 0.06);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.02), rgba(0, 0, 0, 0.06));
}

.rack-slot:first-child {
  border-top: 0;
}

.rack-slot.is-drop-target {
  background:
    linear-gradient(180deg, rgba(236, 129, 69, 0.16), rgba(236, 129, 69, 0.08));
}

.rack-slot__label {
  position: absolute;
  left: -52px;
  top: 8px;
  font-size: 0.76rem;
  color: rgba(219, 225, 235, 0.84);
}

.rack-items-layer {
  position: absolute;
  inset: 24px 38px 24px 74px;
}

.rack-item {
  position: absolute;
  left: 0;
  right: 0;
  padding: 0;
  user-select: none;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, #272c34, #11151b);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.08),
    inset 0 -12px 18px rgba(0, 0, 0, 0.28);
}

.rack-item[data-standard="10_inch"] {
  right: 16%;
}

.rack-item.is-dragging {
  opacity: 0.6;
}

.rack-item__header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.rack-item__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 8px 10px 8px 12px;
  background: linear-gradient(90deg, rgba(11, 13, 16, 0.72), rgba(11, 13, 16, 0.08) 45%, rgba(11, 13, 16, 0.56));
}

.rack-item__face {
  position: absolute;
  inset: 0;
}

.rack-item__meta,
.list-output,
.notes {
  color: rgba(222, 227, 235, 0.76);
  font-size: 0.9rem;
}

.rack-item__header strong {
  color: #f3f5f8;
}

.rack-item__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.rack-item__actions button {
  padding: 8px 10px;
  font-size: 0.84rem;
  background: rgba(181, 93, 45, 0.9);
}

.subpanel {
  padding: 16px;
  display: grid;
  gap: 12px;
}

.subpanel__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.stat-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

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

.list-output {
  display: grid;
  gap: 10px;
}

.bom-line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.64);
}

.notice {
  padding: 12px 14px;
}

.notes {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 8px;
}

.notes li.ok {
  color: var(--success);
}

.notes li.warn {
  color: var(--warning);
}

.empty-state {
  padding: 20px;
  text-align: center;
  color: var(--muted);
  border: 1px dashed rgba(75, 57, 37, 0.2);
  border-radius: var(--radius-md);
}

.device-face {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 8px 12px;
  overflow: hidden;
}

.device-face--library {
  min-height: 72px;
  border-radius: 10px;
}

.device-face--rack {
  min-height: 100%;
}

.device-face--switch,
.device-face--patch-panel,
.device-face--pdu,
.device-face--blank,
.device-face--generic {
  background: linear-gradient(180deg, #4d535d 0%, #262c34 18%, #12161d 100%);
}

.device-face--ups {
  background: linear-gradient(180deg, #636973 0%, #2a3038 16%, #0f1319 100%);
}

.device-face--shelf {
  background: linear-gradient(180deg, #3e444c 0%, #171b21 100%);
}

.device-silkscreen {
  position: absolute;
  left: 12px;
  bottom: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(222, 227, 235, 0.58);
}

.device-leds {
  display: flex;
  gap: 5px;
  position: absolute;
  top: 10px;
  right: 12px;
}

.device-leds span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #b8ff8e, #367f26 72%);
  box-shadow: 0 0 8px rgba(114, 255, 86, 0.4);
}

.device-ports,
.device-keystones,
.device-sockets {
  display: grid;
  gap: 4px;
}

.device-ports {
  position: absolute;
  left: 16px;
  right: 54px;
  top: 18px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.device-ports span,
.device-keystones span {
  height: 11px;
  border-radius: 2px;
  background: linear-gradient(180deg, #181d23, #050709);
  border: 1px solid rgba(183, 191, 207, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.device-ports--8 {
  grid-template-columns: repeat(8, minmax(0, 1fr));
}

.device-ports--12 {
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.device-keystones {
  position: absolute;
  left: 16px;
  right: 16px;
  top: 18px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.device-face--patch-panel .device-keystones span {
  height: 13px;
  background: linear-gradient(180deg, #0b0d10, #1b2128);
}

.device-face--patch-panel .device-keystones span:nth-child(odd) {
  border-color: rgba(239, 147, 78, 0.24);
}

.device-uplink {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 22px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid rgba(188, 197, 214, 0.15);
  background: linear-gradient(180deg, #11161c, #050709);
}

.device-sockets {
  position: absolute;
  top: 14px;
  left: 16px;
  right: 44px;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  align-items: center;
}

.device-sockets span {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background:
    radial-gradient(circle at center, transparent 0 3px, #0f1216 3px 5px, transparent 5px),
    linear-gradient(180deg, #aeb8c6, #57606e);
  border: 1px solid rgba(229, 233, 240, 0.18);
}

.device-display {
  position: absolute;
  left: 16px;
  top: 14px;
  width: 68px;
  height: 30px;
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(46, 180, 156, 0.9), rgba(18, 97, 90, 0.92)),
    linear-gradient(180deg, #0f151c, #080b0f);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 0 16px rgba(46, 180, 156, 0.22);
}

.device-vents {
  position: absolute;
  top: 16px;
  right: 18px;
  width: 96px;
  height: 22px;
  background:
    repeating-linear-gradient(90deg, rgba(222, 227, 235, 0.16) 0 3px, transparent 3px 7px);
  opacity: 0.8;
}

.device-shelf-top {
  position: absolute;
  left: 18px;
  right: 18px;
  top: 14px;
  height: 18px;
  border-radius: 4px 4px 12px 12px;
  background: linear-gradient(180deg, #69707a, #262b33);
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.28);
}

@media (max-width: 1280px) {
  .workspace {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 720px) {
  .app-shell {
    padding: 18px;
  }

  .rack-summary,
  .stat-grid,
  .field-row {
    grid-template-columns: 1fr;
  }

  .rack-grid {
    padding-left: 62px;
    padding-right: 26px;
  }

  .rack-items-layer {
    inset: 24px 26px 24px 62px;
  }
}