/* nodbeat design system: tokens first, then elements, then components. */

:root {
  color-scheme: light;
  --font-sans:
    system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    sans-serif;
  --font-mono:
    ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1a1d23;
  --text-muted: #5b6270;
  --border: #d9dde3;
  /* Outlines of form controls: 3:1 against the background (WCAG 1.4.11). */
  --border-strong: #7b8390;
  --accent: #0b6bcb;
  --accent-hover: #0957a5;
  --on-accent: #ffffff;
  --danger: #b42318;
  --danger-bg: #b42318;
  --on-danger: #ffffff;
  --focus: #0b6bcb;
  --code-bg: #eef1f5;

  --up-fg: #11622f;
  --up-bg: #dcf3e3;
  --down-fg: #9b1c1c;
  --down-bg: #fde2e2;
  --new-fg: #3d4a5c;
  --new-bg: #e6ebf2;
  --paused-fg: #7a4b00;
  --paused-bg: #fbecc9;

  --radius: 8px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2.5rem;
  --max-width: 60rem;
}

/* Dark tokens, twice: an explicit choice, and "system" when the OS prefers dark. */
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f1217;
  --surface: #171b22;
  --text: #e6e8eb;
  --text-muted: #9aa3b2;
  --border: #2c333e;
  --border-strong: #6f7a8a;
  --accent: #6cb2ff;
  --accent-hover: #92c6ff;
  --on-accent: #0b1220;
  --danger: #ff8a80;
  --danger-bg: #ff8a80;
  --on-danger: #1a0505;
  --focus: #6cb2ff;
  --code-bg: #1f252e;

  --up-fg: #7ee2a0;
  --up-bg: #0f2e1b;
  --down-fg: #ff9c9c;
  --down-bg: #3a1414;
  --new-fg: #c3ccd9;
  --new-bg: #232a35;
  --paused-fg: #f3c76b;
  --paused-bg: #3a2a0a;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="system"] {
    color-scheme: dark;
    --bg: #0f1217;
    --surface: #171b22;
    --text: #e6e8eb;
    --text-muted: #9aa3b2;
    --border: #2c333e;
    --border-strong: #6f7a8a;
    --accent: #6cb2ff;
    --accent-hover: #92c6ff;
    --on-accent: #0b1220;
    --danger: #ff8a80;
    --danger-bg: #ff8a80;
    --on-danger: #1a0505;
    --focus: #6cb2ff;
    --code-bg: #1f252e;

    --up-fg: #7ee2a0;
    --up-bg: #0f2e1b;
    --down-fg: #ff9c9c;
    --down-bg: #3a1414;
    --new-fg: #c3ccd9;
    --new-bg: #232a35;
    --paused-fg: #f3c76b;
    --paused-bg: #3a2a0a;
  }
}

/* Elements */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-3);
}

h1,
h2,
h3 {
  line-height: 1.25;
}

h1 {
  font-size: 1.75rem;
  margin: 0 0 var(--space-3);
}

h2 {
  font-size: 1.25rem;
  margin: var(--space-5) 0 var(--space-2);
}

h3 {
  font-size: 1rem;
  margin: var(--space-4) 0 var(--space-2);
}

a {
  color: var(--accent);
}

a:hover {
  color: var(--accent-hover);
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: 2px;
}

code,
pre {
  font-family: var(--font-mono);
  font-size: 0.875rem;
}

code {
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

pre {
  background: var(--code-bg);
  padding: var(--space-3);
  border-radius: var(--radius);
  overflow-x: auto;
}

pre code {
  background: none;
  padding: 0;
}

small {
  color: var(--text-muted);
}

/* Forms */

label {
  display: block;
  margin: var(--space-3) 0;
  font-weight: 500;
}

input,
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
  max-width: 100%;
}

label > input:not([type="checkbox"]),
label > textarea {
  display: block;
  width: 100%;
  margin-top: var(--space-1);
}

label > input[type="number"] {
  display: inline-block;
  width: 8rem;
}

label > select {
  margin-top: var(--space-1);
}

input[readonly] {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  width: 100%;
}

button {
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  color: var(--on-accent);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
}

a.button {
  display: inline-block;
  font-weight: 600;
  text-decoration: none;
  color: var(--on-accent);
  background: var(--accent);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-2) var(--space-3);
}

a.button:hover,
button:hover {
  color: var(--on-accent);
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}

button.secondary,
button.secondary:hover,
a.button.secondary,
a.button.secondary:hover {
  color: var(--text);
  background: var(--surface);
  border-color: var(--border-strong);
}

button.secondary:hover,
a.button.secondary:hover {
  border-color: var(--text);
}

button.danger,
button.danger:hover,
a.button.danger,
a.button.danger:hover {
  color: var(--on-danger);
  background: var(--danger-bg);
  border-color: var(--danger-bg);
}

button.button-link,
button.button-link:hover {
  font-weight: inherit;
  color: var(--accent);
  background: none;
  border: none;
  padding: 0;
  text-decoration: underline;
}

.page-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-3);
}

.title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin-bottom: var(--space-3);
}

.title-row h1,
.page-head h1 {
  margin: 0;
}

.narrow,
.card.narrow {
  max-width: 28rem;
  margin: var(--space-4) auto;
}

form.inline {
  display: inline;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-3);
  margin: var(--space-3) 0;
}

.actions form {
  margin: 0;
}

.error {
  color: var(--danger);
  font-weight: 500;
}

/* Classes that set display must not override the hidden attribute. */
[hidden] {
  display: none !important;
}

/* Monitor page below the settings: wiring (URL, examples) left, logs (Incidents, Heartbeats) right; stacked when narrow. */
.monitor-columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(22rem, 100%), 1fr));
  gap: 0 var(--space-4);
  align-items: start;
}

.monitor-columns > section {
  min-width: 0;
}

.monitor-columns > section > h2:first-child {
  margin-top: var(--space-3);
}

/* Flash message: the one-time result of the previous action. */
.flash {
  margin: 0 0 var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--up-fg);
  background: var(--up-bg);
  border-radius: var(--radius);
  font-weight: 500;
}

/* Copy buttons sit next to the text they copy. */
.copy-row {
  display: flex;
  gap: var(--space-2);
  align-items: center;
}

.copy-row input {
  flex: 1;
  min-width: 0;
}

.code-block {
  position: relative;
}

.code-block pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.code-block pre:has(+ .copy:not([hidden])) {
  padding-right: 5.5rem;
}

.code-block .copy {
  position: absolute;
  top: var(--space-2);
  right: var(--space-2);
}

button.copy {
  font-size: 0.875rem;
  padding: var(--space-1) var(--space-2);
  white-space: nowrap;
}

.empty-state {
  text-align: center;
  padding: var(--space-5) var(--space-3);
}

.empty-state p {
  color: var(--text-muted);
}

.muted {
  color: var(--text-muted);
}

/* Tables */

.table-wrap {
  overflow-x: auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  text-align: left;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

tbody tr:last-child td {
  border-bottom: none;
}

/* Labelled numbers (Admin page): label left, number right. */
table.stats tbody tr:last-child th {
  border-bottom: none;
}

table.stats td {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

/* Cards and lists */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3) var(--space-4);
  margin: var(--space-3) 0;
}

.card > :first-child {
  margin-top: 0;
}

.card > :last-child {
  margin-bottom: 0;
}

ul.plain {
  list-style: none;
  padding: 0;
}

ul.plain > li {
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
}

ul.plain > li:last-child {
  border-bottom: none;
}

.notes {
  white-space: pre-wrap;
}

/* State badges: Up, Down, New, Paused */

.badge {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.3em 0.6em;
  border-radius: 999px;
  white-space: nowrap;
}

.badge-up {
  color: var(--up-fg);
  background: var(--up-bg);
}

.badge-down {
  color: var(--down-fg);
  background: var(--down-bg);
}

.badge-new {
  color: var(--new-fg);
  background: var(--new-bg);
}

.badge-paused {
  color: var(--paused-fg);
  background: var(--paused-bg);
}

/* Header and nav */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2) var(--space-4);
  padding: var(--space-2) var(--space-3);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--text);
}

.logo {
  color: var(--accent);
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2) var(--space-4);
}

.nav-links a {
  text-decoration: none;
  font-weight: 500;
}

.nav-links form {
  margin: 0;
}

/* Three-way theme switch: a segmented control of submit buttons. */
.theme-switch {
  display: inline-flex;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  overflow: hidden;
}

.theme-switch button,
.theme-switch button:hover {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text);
  background: var(--surface);
  border: none;
  border-radius: 0;
  padding: var(--space-1) var(--space-2);
}

.theme-switch button + button {
  border-left: 1px solid var(--border-strong);
}

.theme-switch button:hover {
  background: var(--code-bg);
}

/* overflow: hidden would clip an outside focus ring. */
.theme-switch button:focus-visible {
  outline-offset: -3px;
}

.theme-switch button[aria-pressed="true"] {
  color: var(--on-accent);
  background: var(--accent);
}

/* --focus equals --accent, so the pressed button needs its own ring color. */
.theme-switch button[aria-pressed="true"]:focus-visible {
  outline-color: var(--on-accent);
}

.nav-email {
  color: var(--text-muted);
  overflow-wrap: anywhere;
}

/* The checkbox drives the phone menu without JS. Hidden on wider screens; on a phone it stays focusable but invisible. */
.nav-toggle {
  display: none;
}

.nav-toggle-label {
  display: none;
  margin: 0;
  cursor: pointer;
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
}

.nav-toggle:focus-visible + .nav-toggle-label {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

@media (max-width: 40rem) {
  .nav-toggle {
    display: block;
    position: absolute;
    opacity: 0;
    width: 1px;
    height: 1px;
  }

  .nav-toggle-label {
    display: inline-block;
  }

  .nav-links {
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-2) 0;
  }

  .nav-toggle:checked ~ .nav-links {
    display: flex;
  }

  h1 {
    font-size: 1.5rem;
  }

  /* Dashboard rows become cards: the header row hides and each cell carries its own label. */
  table.cards thead {
    display: none;
  }

  table.cards,
  table.cards tbody,
  table.cards tr,
  table.cards td {
    display: block;
  }

  table.cards tr {
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid var(--border);
  }

  table.cards tbody tr:last-child {
    border-bottom: none;
  }

  table.cards td {
    display: flex;
    justify-content: space-between;
    gap: var(--space-3);
    padding: var(--space-1) 0;
    border: none;
    overflow-wrap: anywhere;
  }

  table.cards td[data-label]::before {
    content: attr(data-label);
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-muted);
    flex: none;
  }

  table.cards td.cell-name {
    font-weight: 600;
    font-size: 1.0625rem;
  }

  .actions > .button,
  .actions > form {
    flex: 1 1 auto;
  }

  .actions > .button,
  .actions > form > button {
    width: 100%;
    text-align: center;
  }
}

/* Landing page */

.hero {
  text-align: center;
  padding: var(--space-5) 0 var(--space-4);
}

.hero h1 {
  font-size: 2.25rem;
  line-height: 1.2;
}

.lead {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 36rem;
  margin: 0 auto var(--space-4);
}

.steps {
  list-style: none;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: var(--space-3);
  counter-reset: step;
}

.steps > li.card {
  margin: 0;
  min-width: 0;
  counter-increment: step;
}

.steps h3::before {
  content: counter(step) ". ";
  color: var(--accent);
}

.steps pre {
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.features {
  padding-left: var(--space-4);
}

.features > li {
  margin: var(--space-2) 0;
}

.features strong {
  display: block;
}

@media (max-width: 40rem) {
  .hero {
    padding-top: var(--space-4);
  }

  .hero h1 {
    font-size: 1.75rem;
  }
}

/* Footer */

.site-footer {
  padding: var(--space-3);
  text-align: center;
  font-size: 0.875rem;
  border-top: 1px solid var(--border);
}

.site-footer a {
  color: var(--text-muted);
}