:root {
  color-scheme: dark;
  --bg: #0b0d10;
  --port-width: 32px;
  --port-gap: 4px;
  --reference-grid-width: 860px;
  --panel-width: calc(var(--reference-grid-width) + 18px);
  --slot-height: 94px;
  --slot-half-height: calc(var(--slot-height) / 2);
  --rack-label-width: 38px;
  --toolbar-height: 54px;
  --panel-edge-strong: #303741;
  --field-bg: #11151a;
  --field-border: #2e353d;
  --text: #d6dde6;
  --text-dim: #8b949e;
  --active-strong: #76c392;
  --hover: #44505c;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: #0b0d10;
  color: var(--text);
  font-family: "IBM Plex Sans", sans-serif;
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
input,
select,
textarea {
  border: 0;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 1px solid #7c8b99;
  outline-offset: 1px;
}

.app-shell {
  width: 100%;
  margin: 0 auto;
  padding: 20px calc(20px + env(safe-area-inset-right)) calc(28px + env(safe-area-inset-bottom))
    calc(20px + env(safe-area-inset-left));
}

.toolbar {
  position: fixed;
  top: calc(14px + env(safe-area-inset-top));
  left: calc(14px + env(safe-area-inset-left));
  right: calc(14px + env(safe-area-inset-right));
  z-index: 40;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
}

.toolbar-left,
.toolbar-actions {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
}

.toolbar-button,
.mini-icon-button,
.dialog-button,
.menu-item {
  background: #14181d;
  color: var(--text);
  border: 1px solid var(--panel-edge-strong);
}

.toolbar-button {
  height: 34px;
  padding: 0 10px;
  cursor: pointer;
  font-family: "IBM Plex Mono", monospace;
  font-size: 1.2rem;
  line-height: 1;
}

.toolbar-text-button {
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.add-panel-menu,
.transfer-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 10;
  display: grid;
  max-width: calc(100vw - 28px);
  overflow-x: hidden;
  background: #0f1317;
  border: 1px solid var(--panel-edge-strong);
}

.add-panel-menu {
  min-width: 150px;
}

.transfer-menu {
  min-width: 184px;
}

.add-panel-menu.hidden,
.transfer-menu.hidden,
.status-banner.hidden,
.modal.hidden {
  display: none;
}

.menu-item {
  padding: 9px 12px;
  text-align: left;
  cursor: pointer;
  border-left: 0;
  border-right: 0;
  border-top: 0;
}

.menu-item:last-child {
  border-bottom: 0;
}

.menu-divider {
  height: 1px;
  background: rgba(73, 84, 97, 0.7);
}

.hidden-file-input {
  display: none;
}

.status-banner {
  position: fixed;
  top: calc(56px + env(safe-area-inset-top));
  left: calc(14px + env(safe-area-inset-left));
  z-index: 45;
  max-width: 340px;
  padding: 8px 10px;
  background: #11161b;
  color: var(--text);
  border: 1px solid var(--panel-edge-strong);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
}

.menu-item:hover,
.toolbar-button:hover,
.mini-icon-button:hover,
.dialog-button:hover,
.port-button:hover,
.panel-title-input:hover,
.placeholder-label-input:hover,
.field input:hover,
.field textarea:hover,
.field select:hover {
  border-color: var(--hover);
}

.workspace {
  display: flex;
  justify-content: center;
  padding-top: calc(var(--toolbar-height) + env(safe-area-inset-top));
}

.mobile-warning {
  display: none;
  position: fixed;
  left: calc(14px + env(safe-area-inset-left));
  right: calc(14px + env(safe-area-inset-right));
  bottom: calc(14px + env(safe-area-inset-bottom));
  z-index: 50;
  padding: 10px 12px;
  background: rgba(17, 22, 27, 0.92);
  color: var(--text);
  border: 1px solid var(--panel-edge-strong);
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.55);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  text-align: center;
}

.rack-frame {
  position: relative;
  width: calc(var(--panel-width) + (2 * var(--rack-label-width)));
  flex: 0 0 auto;
  padding: 4px 0;
}

.rack-frame::before,
.rack-frame::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 18px;
  border: 1px solid #2b3037;
  background:
    repeating-linear-gradient(
      180deg,
      rgba(255, 255, 255, 0.05) 0 2px,
      transparent 2px 18px
    ),
    repeating-radial-gradient(
      circle at 50% 9px,
      rgba(10, 12, 15, 0.96) 0 1.5px,
      rgba(52, 59, 67, 0.9) 1.5px 2.5px,
      transparent 2.5px 18px
    ),
    linear-gradient(180deg, #171b20, #101419);
}

.rack-frame::before {
  left: calc((var(--rack-label-width) - 18px) / 2);
}

.rack-frame::after {
  right: calc((var(--rack-label-width) - 18px) / 2);
}

.rack-slots {
  display: grid;
  grid-template-columns: var(--rack-label-width) var(--panel-width) var(--rack-label-width);
  grid-auto-rows: var(--slot-half-height);
  align-items: stretch;
  gap: 0;
}

.empty-state {
  width: 100%;
  grid-column: 2;
  grid-row: 1;
  align-self: start;
  z-index: 1;
  padding: 28px 14px;
  border: 1px dashed var(--field-border);
  color: var(--text-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
  text-align: center;
}

.rack-unit-label {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.04em;
}

.rack-slot {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100%;
  border-top: 1px solid transparent;
}

.rack-slot.full-unit {
  border-top-color: rgba(83, 92, 104, 0.42);
}

.rack-slot.drop-target::after {
  content: "";
  position: absolute;
  inset: 6px 0;
  border: 1px dashed rgba(124, 139, 153, 0.52);
  background: rgba(80, 95, 111, 0.08);
  pointer-events: none;
}

.rack-drop-preview {
  width: var(--panel-width);
  align-self: stretch;
  margin: 0;
  z-index: 3;
  border: 1px dashed rgba(124, 139, 153, 0.72);
  background: rgba(92, 108, 124, 0.1);
  box-shadow: inset 0 0 0 1px rgba(18, 22, 27, 0.9);
  pointer-events: none;
}

.rack-drop-preview.invalid {
  border-color: rgba(154, 102, 102, 0.72);
  background: rgba(96, 48, 48, 0.14);
}

.patch-panel-unit,
.rack-placeholder-item {
  width: var(--panel-width);
  align-self: stretch;
  z-index: 2;
  cursor: grab;
}

.patch-panel-unit {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 6px;
  min-height: 100%;
  padding: 7px 8px 8px;
  border: 1px solid var(--panel-edge-strong);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.22);
  background: linear-gradient(180deg, #151a20 0, #101317 14px, #0f1317 100%);
}

.patch-panel-unit.is-multi-unit {
  gap: 6px;
  padding-bottom: 8px;
}

.patch-panel-unit.dragging,
.rack-placeholder-item.dragging {
  opacity: 0.5;
  cursor: grabbing;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 0 2px 0 4px;
}

.panel-title-input {
  min-width: 0;
  padding: 2px 0;
  background: transparent;
  color: var(--text);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-bottom: 1px solid transparent;
}

.panel-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.panel-meta,
.placeholder-meta {
  display: inline-flex;
  align-items: center;
  color: var(--text-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
}

.mini-icon-button {
  width: 26px;
  height: 26px;
  padding: 0;
  cursor: pointer;
  font-family: "IBM Plex Mono", monospace;
  line-height: 1;
}

.rack-placeholder-item {
  border: 1px solid var(--panel-edge-strong);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.22);
}

.rack-placeholder-item.marked {
  border-color: var(--mark-color, var(--panel-edge-strong));
  border-width: 2px;
}

.panel-rail {
  display: grid;
  place-items: start center;
  width: 100%;
  min-height: 0;
  padding: 0;
}

.patch-panel-unit.is-48 .panel-rail {
  padding-top: 6px;
}

.patch-panel-unit.is-multi-unit .panel-rail {
  place-items: center;
}

.ports-grid {
  display: grid;
  width: 100%;
  align-content: center;
  justify-content: center;
  gap: 7px var(--port-gap);
}

.ports-grid.layout-12 {
  width: 428px;
  grid-template-columns: repeat(12, var(--port-width));
  padding-top: 1px;
}

.ports-grid.layout-24 {
  width: var(--reference-grid-width);
  grid-template-columns: repeat(24, var(--port-width));
  padding-top: 1px;
}

.ports-grid.layout-48 {
  width: var(--reference-grid-width);
  grid-template-columns: repeat(24, var(--port-width));
  align-content: center;
  row-gap: 6px;
  min-height: 100%;
  padding: 1px 0 0;
}

.ports-grid.layout-48 .port-button {
  gap: 2px;
}

.ports-grid.layout-48 .port-index {
  min-height: 8px;
  font-size: 0.55rem;
}

.port-button {
  position: relative;
  display: grid;
  justify-items: center;
  gap: 4px;
  width: var(--port-width);
  padding: 0;
  background: transparent;
  cursor: pointer;
  border: 1px solid transparent;
}

.port-index {
  min-height: 12px;
  color: var(--text-dim);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.62rem;
  line-height: 1;
}

.rj45-port {
  position: relative;
  display: block;
  width: var(--port-width);
  height: 24px;
  background: linear-gradient(180deg, #1f252c 0, #151a20 38%, #0f1317 100%);
  border: 1px solid #353d46;
}

.port-button.active .rj45-port {
  background: linear-gradient(180deg, #4b7b61 0, #345643 38%, #17231b 100%);
  border-color: var(--active-strong);
}

.port-button.marked:not(.active) .rj45-port {
  border-color: var(--mark-color, #5b646f);
  border-width: 2px;
  background: linear-gradient(180deg, var(--mark-color) 0, var(--mark-color) 100%);
}

.port-button.active.marked .rj45-port {
  border-color: var(--mark-color, #5b646f);
  border-width: 2px;
}

@supports (color: color-mix(in srgb, #000 50%, #fff)) {
  .port-button.marked:not(.active) .rj45-port {
    background: linear-gradient(
      180deg,
      color-mix(in srgb, var(--mark-color) 46%, #000 54%) 0,
      color-mix(in srgb, var(--mark-color) 30%, #000 70%) 38%,
      color-mix(in srgb, var(--mark-color) 18%, #000 82%) 100%
    );
  }
}

.port-button.assigned:not(.active):not(.marked) .rj45-port {
  border-color: #5b646f;
}

.port-slot {
  position: absolute;
  top: 4px;
  left: 5px;
  right: 5px;
  height: 8px;
  background: #0a0d11;
  border: 1px solid rgba(255, 255, 255, 0.04);
}

.contact-bar {
  position: absolute;
  left: 4px;
  right: 4px;
  bottom: 4px;
  height: 4px;
  background:
    repeating-linear-gradient(
      90deg,
      rgba(214, 221, 230, 0.42) 0 2px,
      rgba(0, 0, 0, 0) 2px 4px
    );
}

.port-button.active .contact-bar {
  background:
    repeating-linear-gradient(
      90deg,
      rgba(228, 248, 237, 0.62) 0 2px,
      rgba(0, 0, 0, 0) 2px 4px
    );
}

.port-button:not(.marked):hover .rj45-port {
  border-color: #6b7783;
}

.port-button.active:not(.marked):hover .rj45-port {
  border-color: #91d3ae;
}

.rack-placeholder-item {
  position: relative;
  display: grid;
  place-items: center;
  padding: 0;
  background: linear-gradient(180deg, #151a20 0, #101317 100%);
}

.placeholder-header {
  position: absolute;
  top: 8px;
  right: 10px;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.placeholder-meta {
  display: none;
}

.placeholder-body {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  min-height: 100%;
  padding: 0 18px;
}

.placeholder-label-input {
  width: min(100%, 520px);
  padding: 0;
  text-align: center;
  background: transparent;
  color: var(--text);
  border: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.placeholder-label-input::placeholder {
  color: var(--text-dim);
  text-transform: none;
}

.dialog-error {
  margin: 0;
  color: #d79a9a;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.dialog-error.hidden {
  display: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 16px;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.72);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(420px, 100%);
  padding: 14px;
  background: #0f1317;
  border: 1px solid var(--panel-edge-strong);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
}

.modal-header h2 {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.modal-form {
  display: grid;
  gap: 12px;
}

.field {
  display: grid;
  gap: 6px;
}

.field span,
.toggle-row span:first-child {
  color: var(--text-dim);
  font-size: 0.78rem;
  font-family: "IBM Plex Mono", monospace;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  padding: 9px 10px;
  background: var(--field-bg);
  color: var(--text);
  border: 1px solid var(--field-border);
}

.mark-color-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  padding: 9px 10px;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
}

.mark-color-option {
  position: relative;
  display: block;
  width: 100%;
  height: 24px;
  cursor: pointer;
}

.mark-color-option input {
  position: absolute;
  inset: 0;
  opacity: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  background: transparent;
  border: 0;
  -webkit-appearance: none;
  appearance: none;
}

.mark-color-swatch {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 4px;
  background: var(--mark-color, transparent);
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.mark-color-option input:focus-visible + .mark-color-swatch {
  outline: 1px solid #7c8b99;
  outline-offset: 2px;
}

.mark-color-option input:checked + .mark-color-swatch {
  outline: 2px solid var(--active-strong);
  outline-offset: 2px;
  border-color: var(--active-strong);
}

.field textarea {
  min-height: 92px;
  resize: vertical;
}

.toggle-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 8px 10px;
  background: var(--field-bg);
  border: 1px solid var(--field-border);
}

.toggle-control {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.toggle-controls {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.toggle-control input {
  accent-color: var(--active-strong);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
}

.dialog-button {
  padding: 8px 12px;
  cursor: pointer;
}

  .dialog-button.primary {
    border-color: var(--active-strong);
    color: #dbeee1;
  }

@media (max-width: 980px) {
  .workspace {
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }
}

@media (max-width: 920px) and (min-width: 761px) {
  :root {
    --port-width: 24px;
    --reference-grid-width: 700px;
    --rack-label-width: 34px;
    --slot-height: 88px;
  }

  .workspace {
    justify-content: center;
    overflow-x: hidden;
  }
}

@media (max-width: 760px) {
  :root {
    --toolbar-height: 64px;
  }

  .app-shell {
    padding-left: calc(12px + env(safe-area-inset-left));
    padding-right: calc(12px + env(safe-area-inset-right));
  }

  .workspace {
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior-x: contain;
  }

  .toolbar {
    left: calc(12px + env(safe-area-inset-left));
    right: calc(12px + env(safe-area-inset-right));
  }

  .toolbar-left,
  .toolbar-actions {
    gap: 6px;
  }

  .toolbar-text-button {
    padding: 0 8px;
    font-size: 0.69rem;
  }

  .status-banner {
    left: calc(12px + env(safe-area-inset-left));
    right: calc(12px + env(safe-area-inset-right));
    max-width: none;
  }

  .panel-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .panel-controls {
    width: 100%;
    justify-content: space-between;
  }

  .modal-actions {
    justify-content: stretch;
  }

  .dialog-button {
    flex: 1;
  }
}

@media (max-width: 700px) {
  :root {
    --toolbar-height: 90px;
  }

  .toolbar {
    flex-wrap: wrap;
    align-items: center;
    row-gap: 8px;
  }

  .toolbar-left,
  .toolbar-actions {
    flex: 1 1 auto;
    min-width: 0;
  }

  .toolbar-actions {
    justify-content: flex-end;
    flex-wrap: wrap;
  }

  .mobile-warning {
    display: block;
  }

  .status-banner {
    top: calc(var(--toolbar-height) + 2px + env(safe-area-inset-top));
  }
}