: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;
  --rack-inner-width: 620px;
  --rack-frame: #50545c;
  --rack-frame-dark: #2e323a;
  --rack-frame-light: #6c7078;
  --rack-rail: #656972;
  --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(189, 193, 201, 0.36), rgba(255, 255, 255, 0.78)),
    linear-gradient(90deg, rgba(88, 92, 99, 0.08), rgba(88, 92, 99, 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: 1px solid rgba(105, 108, 115, 0.22);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(228, 229, 232, 0.86)),
    linear-gradient(90deg, rgba(144, 148, 156, 0.06), rgba(144, 148, 156, 0));
  padding: 28px 40px 28px 74px;
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    inset 0 -18px 24px rgba(134, 137, 145, 0.12),
    0 24px 40px rgba(92, 84, 73, 0.12);
}

.rack-grid {
  outline: 18px solid var(--rack-frame-dark);
  outline-offset: -18px;
}

.rack-grid::before,
.rack-grid::after {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  width: 16px;
  border-radius: 6px;
  background:
    radial-gradient(circle at center 8px, rgba(116, 120, 128, 0.48) 0 2px, transparent 2.5px) center top / 100% 18px repeat-y,
    linear-gradient(180deg, var(--rack-frame-light), var(--rack-rail));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.45),
    inset 0 -10px 10px rgba(79, 82, 90, 0.16);
}

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

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

.rack-grid__bay {
  position: relative;
  width: var(--rack-inner-width);
  margin: 0 auto;
  padding: 18px 0 14px;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 13%, transparent 87%, rgba(0, 0, 0, 0.48)),
    linear-gradient(135deg, rgba(255, 255, 255, 0.05), transparent 30%);
  border-radius: 8px;
  box-shadow:
    inset 0 0 0 2px rgba(0, 0, 0, 0.35),
    inset 0 18px 32px rgba(0, 0, 0, 0.3),
    inset 0 -18px 32px rgba(0, 0, 0, 0.24);
}

.rack-grid__guides {
  position: relative;
  width: 100%;
  background: linear-gradient(180deg, rgba(20, 22, 28, 0.92), rgba(7, 8, 11, 0.98));
  border-left: 4px solid rgba(0, 0, 0, 0.4);
  border-right: 4px solid rgba(0, 0, 0, 0.4);
}

.rack-slot {
  position: relative;
  height: var(--rack-unit-height);
  border-top: 1px solid rgba(126, 131, 140, 0.14);
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.52), rgba(221, 224, 230, 0.42));
}

.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(76, 78, 84, 0.82);
}

.rack-slot__label--right {
  left: auto;
  right: -42px;
}

.rack-items-layer {
  position: absolute;
  inset: 18px 0 14px;
  width: var(--rack-inner-width);
}

.rack-insertion-layer {
  position: absolute;
  inset: 18px 0 14px;
  width: var(--rack-inner-width);
  pointer-events: none;
}

.rack-grid__header-badge {
  position: absolute;
  top: 16px;
  z-index: 4;
  padding: 14px 18px;
  border-radius: 14px;
  background: rgba(17, 19, 24, 0.84);
  color: #f6f7f9;
  font-size: 1rem;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.12),
    0 10px 20px rgba(20, 22, 28, 0.18);
}

.rack-grid__header-badge--left {
  left: 16px;
}

.rack-grid__header-badge--right {
  right: 16px;
}

.rack-insert-zone {
  position: absolute;
  display: flex;
  align-items: center;
  padding: 0;
  border: 0;
  background: transparent;
  pointer-events: auto;
  cursor: pointer;
}

.rack-insert-zone.is-disabled {
  cursor: not-allowed;
}

.rack-insert-zone__ear {
  width: 28px;
  height: calc(100% - 2px);
  border-radius: 10px;
  background: rgba(83, 156, 243, 0.26);
  border: 1px solid rgba(116, 184, 255, 0.5);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
  position: relative;
}

.rack-insert-zone__ear::before,
.rack-insert-zone__ear::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 10px;
  height: 10px;
  margin-left: -5px;
  border-radius: 50%;
  background: rgba(18, 25, 33, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.rack-insert-zone__ear::before {
  top: 10px;
}

.rack-insert-zone__ear::after {
  bottom: 10px;
}

.rack-insert-zone__body {
  flex: 1;
  height: calc(100% - 2px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  color: #deefff;
  border-top: 2px dashed rgba(113, 187, 255, 0.92);
  border-bottom: 2px dashed rgba(113, 187, 255, 0.92);
  background: linear-gradient(180deg, rgba(35, 92, 154, 0.34), rgba(23, 52, 84, 0.42));
  box-shadow: inset 0 0 0 1px rgba(120, 182, 247, 0.24);
  font-size: 1rem;
}

.rack-insert-zone__icon {
  font-size: 1.4rem;
  opacity: 0.9;
}

.rack-insert-zone:hover .rack-insert-zone__body,
.rack-insert-zone:hover .rack-insert-zone__ear {
  background-color: rgba(72, 151, 228, 0.34);
}

.rack-insert-zone.is-disabled .rack-insert-zone__body,
.rack-insert-zone.is-disabled .rack-insert-zone__ear {
  opacity: 0.28;
}

.rack-item {
  position: absolute;
  left: 0;
  padding: 0;
  user-select: none;
  overflow: hidden;
  border-radius: 10px;
  border: 1px solid rgba(122, 127, 137, 0.35);
  background: linear-gradient(180deg, #fcfcfd, #e1e5eb);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.76),
    0 10px 18px rgba(80, 84, 93, 0.18);
  touch-action: none;
  cursor: grab;
}

.rack-item.is-dragging {
  opacity: 0.82;
  cursor: grabbing;
}

.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(250, 251, 252, 0.86), rgba(250, 251, 252, 0.08) 38%, rgba(250, 251, 252, 0.72));
}

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

.rack-item__meta,
.list-output,
.notes {
  color: rgba(77, 80, 87, 0.86);
  font-size: 0.9rem;
}

.rack-item__header strong {
  color: #17191c;
}

.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, 0.92);
}

.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;
}

.field--status {
  align-content: end;
}

.selection-info {
  min-height: 46px;
  display: flex;
  align-items: center;
  padding: 12px 14px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(83, 58, 31, 0.14);
  color: var(--muted);
}

.selection-info.is-active {
  background: rgba(28, 109, 190, 0.08);
  border-color: rgba(28, 109, 190, 0.3);
  color: #1e4f82;
}

.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 28px;
  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, #fcfcfd 0%, #e9edf3 18%, #d7dbe2 100%);
}

.device-face--ups {
  background: linear-gradient(180deg, #f7f8fb 0%, #e0e4ea 20%, #cfd5dc 100%);
}

.device-face--shelf {
  background: linear-gradient(180deg, #f5f6f8 0%, #d4d9e0 100%);
}

.device-face::before,
.device-face::after {
  content: "";
  position: absolute;
  top: 5px;
  bottom: 5px;
  width: 20px;
  border-radius: 5px;
  background: linear-gradient(180deg, #d7dbe2, #b4bbc6);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.65),
    inset 0 -8px 10px rgba(95, 101, 112, 0.18);
}

.device-face::before {
  left: 4px;
}

.device-face::after {
  right: 4px;
}

.device-brand {
  position: absolute;
  top: 7px;
  left: 36px;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(51, 58, 67, 0.92);
  font-weight: 700;
}

.device-silkscreen {
  position: absolute;
  left: 36px;
  bottom: 8px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(90, 95, 104, 0.76);
}

.device-mount-hole {
  position: absolute;
  top: 50%;
  width: 7px;
  height: 7px;
  margin-top: -3.5px;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, #79808b 0 1px, #4c525b 1.3px 2.5px, #cdd2da 2.5px);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
  z-index: 2;
}

.device-mount-hole--left {
  left: 11px;
}

.device-mount-hole--right {
  right: 11px;
}

.device-leds {
  display: flex;
  gap: 5px;
  position: absolute;
  top: 9px;
  right: 38px;
}

.device-leds span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #9dff87, #2d7b1a 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: 40px;
  right: 70px;
  top: 22px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.device-ports span,
.device-keystones span {
  height: 12px;
  border-radius: 3px;
  background: linear-gradient(180deg, #444c56, #1d2229);
  border: 1px solid rgba(125, 132, 143, 0.22);
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.1),
    0 1px 1px rgba(255, 255, 255, 0.08);
}

.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: 40px;
  right: 40px;
  top: 20px;
  grid-template-columns: repeat(12, minmax(0, 1fr));
}

.device-face--patch-panel .device-keystones span {
  height: 14px;
  background: linear-gradient(180deg, #dde2e8, #acb3bd);
}

.device-face--patch-panel .device-keystones span:nth-child(odd) {
  border-color: rgba(119, 124, 135, 0.32);
}

.device-uplink {
  position: absolute;
  top: 20px;
  right: 40px;
  width: 22px;
  height: 16px;
  border-radius: 4px;
  border: 1px solid rgba(110, 117, 127, 0.25);
  background: linear-gradient(180deg, #5b646f, #262b31);
}

.device-sockets {
  position: absolute;
  top: 18px;
  left: 40px;
  right: 56px;
  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, #4a515b 3px 5px, transparent 5px),
    linear-gradient(180deg, #f5f6f8, #c4cad4);
  border: 1px solid rgba(120, 126, 137, 0.18);
}

.device-display {
  position: absolute;
  left: 40px;
  top: 16px;
  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: 18px;
  right: 42px;
  width: 96px;
  height: 22px;
  background:
    repeating-linear-gradient(90deg, rgba(102, 108, 118, 0.36) 0 3px, transparent 3px 7px);
  opacity: 0.8;
}

.device-handles {
  position: absolute;
  inset: auto 48px 12px 48px;
  display: flex;
  justify-content: space-between;
}

.device-handles span {
  width: 18px;
  height: 8px;
  border-radius: 999px;
  border: 2px solid rgba(88, 95, 106, 0.7);
}

.device-shelf-top {
  position: absolute;
  left: 40px;
  right: 40px;
  top: 18px;
  height: 18px;
  border-radius: 4px 4px 12px 12px;
  background: linear-gradient(180deg, #d1d7df, #8f98a4);
  box-shadow: 0 5px 12px rgba(78, 82, 90, 0.18);
}

@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-grid__bay,
  .rack-items-layer {
    width: 100%;
  }
}