:root {
  color-scheme: light;
  font:
    16px/1.5 -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: #19303a;
  background: #f2f7f7;
}
* {
  box-sizing: border-box;
}
[hidden] {
  display: none !important;
}
body {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 1.35rem 3rem;
}
nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  min-height: 76px;
  border-bottom: 1px solid #d9e6e6;
  margin-bottom: 2rem;
}
nav .brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  margin-right: 1.1rem;
  white-space: nowrap;
}
nav .brand img {
  display: block;
  width: 36px;
  height: 36px;
  object-fit: contain;
  flex: none;
}
nav strong {
  font-size: 1.25rem;
  letter-spacing: -0.04em;
  color: #087a76;
}
nav a {
  padding: 0.5rem 0.72rem;
  border-radius: 0.5rem;
  color: #36535b;
  text-decoration: none;
  font-weight: 600;
}
nav a:hover,
nav a[aria-current="page"] {
  background: #e0f1ed;
  color: #086b66;
}
nav form {
  margin-left: auto;
}
a {
  color: #087a76;
  text-underline-offset: 0.15em;
}
a:hover {
  color: #035d5b;
}
main {
  display: grid;
  gap: 1.35rem;
}
section,
.card {
  background: #fff;
  padding: clamp(1rem, 2.5vw, 1.55rem);
  border: 1px solid #dfe9e9;
  border-radius: 0.9rem;
  box-shadow: 0 6px 22px #193e3c08;
}
h1,
h2,
h3 {
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin: 0 0 0.75rem;
}
h1 {
  font-size: clamp(1.65rem, 3vw, 2rem);
}
h2 {
  font-size: 1.25rem;
}
h3 {
  font-size: 1.05rem;
}
p {
  margin: 0.45rem 0 1rem;
}
form {
  display: grid;
  gap: 0.85rem;
}
label {
  display: grid;
  gap: 0.3rem;
  max-width: 36rem;
  font-weight: 600;
}
input,
select,
textarea,
button {
  font: inherit;
  border-radius: 0.5rem;
}
input,
select,
textarea {
  padding: 0.62rem 0.72rem;
  border: 1px solid #b8cccf;
  background: #fff;
  min-width: 0;
}
input:focus,
select:focus,
textarea:focus {
  outline: 2px solid #19a9a3;
  outline-offset: 1px;
}
button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 0.6rem 1rem;
  border: 1px solid #087a76;
  border-radius: 0.5rem;
  background: #087a76;
  color: #fff;
  font-weight: 650;
  cursor: pointer;
  text-decoration: none;
}
button:hover,
.button:hover {
  background: #05635f;
  color: #fff;
}
button:focus-visible,
.button:focus-visible {
  outline: 3px solid #e3a957;
  outline-offset: 2px;
}
button.secondary,
.button.secondary {
  background: #fff;
  color: #087a76;
}
button.secondary:hover,
.button.secondary:hover {
  background: #eaf5f3;
  color: #035d5b;
}
button.danger {
  border-color: #a43d38;
  color: #a43d38;
  background: #fff;
}
button.danger:hover {
  background: #fff1ef;
}
button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
nav button {
  background: transparent;
  color: #087a76;
}
table {
  border-collapse: collapse;
  width: 100%;
}
td,
th {
  border-bottom: 1px solid #e4ecec;
  text-align: left;
  padding: 0.68rem 0.55rem;
  vertical-align: top;
}
th {
  color: #53666c;
  font-size: 0.83rem;
  font-weight: 700;
}
tr:hover td {
  background: #f7fbfa;
}
.wide {
  overflow-x: auto;
}
.notice {
  background: #fff8e7;
  border-left: 4px solid #d99527;
  padding: 0.8rem 1rem;
  border-radius: 0.25rem;
}
.flash {
  background: #e8f7f3;
  border: 1px solid #b9e4d8;
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
}
.muted,
.hint {
  color: #53666c;
}
.hint {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
}
.eyebrow {
  color: #087a76;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  font-size: 0.77rem;
}
.page-heading,
.section-heading,
.actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.page-heading p {
  margin-bottom: 0;
}
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr));
  gap: 1rem;
}
.cards .card {
  box-shadow: none;
}
.card h2 {
  margin-bottom: 0.4rem;
}
.metric {
  color: #087a76;
  font-size: 1.35rem;
  font-weight: 750;
}
.badge {
  display: inline-block;
  padding: 0.12rem 0.5rem;
  background: #e8f5ef;
  color: #236a4e;
  border-radius: 1rem;
  font-size: 0.8rem;
  font-weight: 700;
}
.badge.warn {
  background: #fff1df;
  color: #936026;
}
code {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}
textarea {
  min-height: 6rem;
  width: min(100%, 45rem);
}
fieldset {
  border: 1px solid #dce8e8;
  border-radius: 0.6rem;
  padding: 0.8rem 1rem;
}
fieldset label {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  font-weight: 400;
}
details > summary {
  cursor: pointer;
  font-weight: 700;
  color: #087a76;
}
.device {
  margin-top: 1rem;
  padding: 1rem;
  border: 1px solid #dce8e8;
  border-radius: 0.75rem;
}
.device > summary {
  display: list-item;
  padding: 0.3rem 0.2rem;
}
.device-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 1rem;
  margin: 1rem 0;
}
.device-grid label {
  max-width: none;
}
.inline-form {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.inline-form select {
  max-width: 13rem;
}
.dialog-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}
.dialog-actions form {
  display: block;
  margin: 0;
}
dialog {
  border: 1px solid #cbdede;
  border-radius: 1rem;
  width: min(680px, calc(100% - 1.5rem));
  max-height: calc(100vh - 2rem);
  padding: 1.5rem;
  color: inherit;
  box-shadow: 0 22px 70px #112f3a55;
  overflow-y: auto;
}
dialog::backdrop {
  background: #102d39a6;
}
dialog h2 {
  margin-right: 2rem;
}
.dialog-close {
  float: right;
  background: transparent;
  color: #52666b;
  border-color: #cbdede;
  padding: 0.2rem 0.6rem;
}
.tabs {
  display: flex;
  gap: 0.4rem;
  border-bottom: 1px solid #dce8e8;
  margin: 1rem 0;
}
.tabs button {
  border: 0;
  border-radius: 0.4rem 0.4rem 0 0;
  background: transparent;
  color: #53666c;
}
.tabs button[aria-selected="true"] {
  background: #e0f1ed;
  color: #087a76;
}
.http-ack {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  max-width: none;
}
.empty {
  color: #53666c;
  padding: 1.2rem 0;
}
@media (max-width: 700px) {
  body {
    padding: 0 0.8rem 2rem;
  }
  nav {
    padding: 0.7rem 0;
  }
  nav form {
    margin-left: 0;
  }
  td,
  th {
    padding: 0.5rem 0.35rem;
  }
}

/* Firmware management: same spacing and colors as the household screens. */
.firmware-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.2rem;
  align-items: start;
}
.firmware-grid section {
  min-width: 0;
  margin-top: 0;
}
.firmware-grid h2 {
  font-size: 1.6rem;
}
.bridge-status {
  display: flex;
  gap: 0.7rem;
  align-items: center;
  margin: 1rem 0;
}
.bridge-status .text-button {
  margin-left: auto;
}
.status-dot {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--teal, #0c8b83);
}
.text-button,
.file-link {
  background: none;
  border: 0;
  padding: 0.4rem 0;
  color: #08766e;
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.95rem;
}
.identity-grid {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 0.3rem 1rem;
}
.identity-grid dd {
  margin: 0;
  overflow-wrap: anywhere;
}
#candidates button {
  display: block;
  width: 100%;
  text-align: left;
  margin: 0.4rem 0;
}
#firmware-info,
#device-secret,
#bridge-invitation {
  overflow-wrap: anywhere;
  word-break: break-word;
}
progress {
  width: 100%;
  accent-color: #08766e;
}
button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}
pre {
  overflow: auto;
}
label:has(input[type="checkbox"]) {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}
label input[type="checkbox"] {
  width: auto;
}
[hidden] {
  display: none !important;
}
@media (max-width: 850px) {
  .firmware-grid {
    grid-template-columns: 1fr;
  }
  .identity-grid {
    grid-template-columns: 1fr;
  }
}

/* YOW: separate page hierarchy, predictable action rows, and local feedback. */
.page-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}
.page-title h1,
.page-heading h1 {
  margin: 0;
}
.page-title {
  padding: 0.2rem 0 0.6rem;
}
#firmware-workspace,
#bridge-online {
  display: grid;
  gap: 1.2rem;
}
.bridge-status {
  margin: 0;
  font-size: 0.9rem;
}
.action-row {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.7rem 1.15rem;
}
.actions {
  justify-content: flex-start;
}
.connection-actions {
  padding-top: 0.65rem;
  border-top: 1px solid #e4ecec;
}
#candidates {
  margin-top: 1rem;
}
#candidates button {
  display: inline-flex;
  width: auto;
  margin: 0;
}
#device-identity:empty {
  display: none;
}
.unsupported-firmware {
  padding: 1.2rem;
  margin: 1.3rem 0;
  border: 1px solid #d5e8e5;
  border-radius: 0.65rem;
  background: #f4faf8;
}
.unsupported-firmware .field-list {
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
}
.firmware-offer-result {
  padding-top: 1rem;
  border-top: 1px solid #d5e8e5;
}
.firmware-offer-result dd {
  overflow-wrap: anywhere;
}
.identity-grid {
  grid-template-columns: max-content 1fr max-content 1fr;
  gap: 0.5rem 1rem;
}
.identity-grid dt {
  color: #53666c;
  font-size: 0.9rem;
}
#connect-panel .section-heading {
  margin-bottom: 0.4rem;
}
#connect-panel h2,
#configure-panel .section-heading h2 {
  margin: 0;
}
.form-block {
  display: grid;
  gap: 0.85rem;
  margin: 1.3rem 0;
}
.form-block + .form-block {
  border-top: 1px solid #e4ecec;
  padding-top: 1.5rem;
  margin-top: 1.5rem;
}
.form-block h3,
.form-block p {
  margin: 0;
}
.form-block label {
  max-width: none;
}
.firmware-grid section > .form-block:last-of-type {
  margin-bottom: 0;
}
.firmware-artifact {
  padding: 1rem;
  margin: 1.3rem 0;
  background: #f4f8f8;
  border-radius: 0.5rem;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
}
#operation-status {
  position: static;
  border: 0;
  box-shadow: none;
  padding: 0.9rem 0 0;
  margin: 0;
  background: transparent;
}
#operation-status p {
  margin: 0 0 0.5rem;
}
#operation-status.error {
  color: #a12727;
}
.toast-region {
  position: fixed;
  z-index: 100;
  top: 1rem;
  right: 1rem;
  width: min(25rem, calc(100vw - 2rem));
  display: grid;
  gap: 0.6rem;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  padding: 1rem;
  border: 1px solid #cce4e1;
  border-left: 4px solid #087a76;
  border-radius: 0.65rem;
  background: white;
  color: #19303a;
  box-shadow: 0 5px 24px #19343e24;
  font-size: 0.95rem;
  overflow-wrap: anywhere;
  pointer-events: auto;
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}
.toast-icon {
  color: #087a76;
  font-weight: 700;
}
.toast-error {
  border-left-color: #bd3c3c;
}
.toast-error .toast-icon {
  color: #a12727;
}
.toast .toast-close,
.toast .toast-close:hover {
  flex: none;
  padding: 0 0.25rem;
  margin: -0.2rem -0.25rem 0 auto;
  border: 0;
  background: transparent;
  color: #53666c;
  font-size: 1.35rem;
  line-height: 1.3;
}
.toast-leaving {
  opacity: 0;
  transform: translateY(-0.4rem);
  pointer-events: none;
}
@media (prefers-reduced-motion: reduce) {
  .toast {
    transition: none;
  }
}
.text-button:hover,
.text-button:active,
.file-link:hover,
.file-link:active,
.brand:hover {
  background: transparent;
  color: #035d5b;
}
.text-button {
  border-radius: 0;
}
.page-footer {
  border-top: 1px solid #d9e6e6;
  padding-top: 1rem;
}
.devices-list td:last-child {
  min-width: 110px;
}
.secret-disclosure {
  font-size: 0.9rem;
}
.secret-disclosure summary {
  font-weight: 500;
}
.secret-disclosure code {
  display: block;
  margin: 0.5rem 0;
}
.advanced-settings {
  margin-top: 0.75rem;
}
.field-list {
  display: grid;
  gap: 0.85rem;
  margin-top: 1rem;
}
.scan-dots span {
  animation: scan-dot 1.2s infinite;
}
.scan-dots span:nth-child(2) {
  animation-delay: 0.2s;
}
.scan-dots span:nth-child(3) {
  animation-delay: 0.4s;
}
#scan-status {
  font-size: 0.9rem;
  color: #53666c;
  min-width: 7rem;
}
@keyframes scan-dot {
  0%,
  70%,
  100% {
    opacity: 0.2;
  }
  35% {
    opacity: 1;
  }
}
@media (prefers-reduced-motion: reduce) {
  .scan-dots span {
    animation: none;
  }
}
@media (max-width: 650px) {
  .identity-grid {
    grid-template-columns: max-content 1fr;
  }
  .page-title {
    align-items: flex-start;
  }
  nav .brand {
    margin-right: 0.3rem;
  }
}
.scale-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}
.scale-card .section-heading h2 {
  margin: 0;
}
.scale-card .section-heading {
  margin-bottom: 0.75rem;
}
.scale-details {
  margin-bottom: 0.5rem;
}
.info-tip {
  position: relative;
  display: inline-block;
  font-weight: normal;
  cursor: help;
}
.info-tip [role="tooltip"] {
  display: none;
  position: absolute;
  z-index: 5;
  top: 1.6em;
  left: -5em;
  width: min(19rem, 68vw);
  padding: 0.7rem 0.85rem;
  border-radius: 0.5rem;
  background: #19343e;
  color: white;
  box-shadow: 0 3px 12px #19343e25;
  font-size: 0.85rem;
  line-height: 1.5;
  white-space: normal;
}
.info-tip:hover [role="tooltip"],
.info-tip:focus [role="tooltip"] {
  display: block;
}
.scale-details th {
  width: 30%;
  color: #087a76;
  font-size: 1rem;
}
.scale-details th,
.scale-details td {
  padding: 0.85rem 0.4rem;
  vertical-align: middle;
}
.scale-details code {
  font-family: inherit;
}
.secret-reveal,
.secret-reveal:hover {
  padding: 0;
  border: 0;
  border-radius: 0;
  color: #19303a;
  background: transparent;
  font-weight: 400;
}
.secret-reveal .hint {
  display: inline;
  margin-left: 0.3rem;
}
.scale-details td code[hidden] {
  display: none;
}
.scale-details td code:not([hidden]) {
  display: block;
}
.bridge-heading h1 {
  margin-bottom: 1.25rem;
}
.bridge-heading .bridge-status {
  margin-bottom: 0;
}
.modal-secondary-action {
  margin-top: 1rem;
  border-top: 1px solid #e4ecec;
  padding-top: 0.5rem;
}
@media (max-width: 850px) {
  .scale-cards {
    grid-template-columns: 1fr;
  }
}

/* Keep long IPv6 addresses readable without shrinking the connection dot. */
.status-dot {
  flex: none;
}
#bridge-status-text {
  min-width: 0;
  overflow-wrap: anywhere;
}

.bridge-status.is-offline .status-dot {
  background: #bd3c3c;
}
.backup-panel .action-row {
  margin: 1.25rem 0;
}
.backup-panel > .hint:last-child {
  margin-bottom: 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #d9e6e6;
  color: #53666c;
  font-size: 0.85rem;
}

.metric-picker {
  display: flex;
  align-items: end;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1rem 0;
}
.metric-picker label {
  margin: 0;
  flex: 1;
  max-width: 24rem;
}
.metric-picker button {
  margin: 0;
}