/* Sessions page. Tokens follow DESIGN.md (Apple reference, dark canvas). Components use tokens only. */
:root {
  --color-canvas: #000000;
  --color-ink: #ffffff;
  --color-muted: #cccccc;
  --color-dim: #86868b;
  --color-hairline: rgba(255, 255, 255, 0.12);
  --color-field: #1d1d1f;
  --color-accent: #2997ff; /* links and "working" on the dark canvas */
  --color-action: #0066cc; /* the one filled button */
  --color-on-action: #ffffff;

  --radius-sm: 8px;
  --radius-pill: 9999px;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 17px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;

  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", system-ui, sans-serif;
  --type-display: 600 40px/1.1 var(--font);
  --type-display-small: 600 28px/1.14 var(--font);
  --type-tagline: 600 21px/1.19 var(--font);
  --type-body: 400 17px/1.47 var(--font);
  --type-body-strong: 600 17px/1.24 var(--font);
  --type-caption: 400 14px/1.43 var(--font);
  --tracking-tight: -0.374px;
  --tracking-display: -0.28px;

  --measure: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--color-canvas);
  color-scheme: dark;
}

body {
  margin: 0;
  background: var(--color-canvas);
  color: var(--color-ink);
  font: var(--type-body);
  letter-spacing: var(--tracking-tight);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* ---- top bar ---- */

.bar {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--color-canvas);
  border-bottom: 1px solid var(--color-hairline);
}

.bar-inner {
  max-width: var(--measure);
  margin: 0 auto;
  padding: var(--space-sm) var(--space-lg);
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
}

.wordmark {
  margin: 0;
  font: var(--type-body-strong);
  letter-spacing: var(--tracking-tight);
}

.summary {
  margin: 0 auto 0 0;
  font: var(--type-caption);
  color: var(--color-dim);
  letter-spacing: 0;
}

.summary.trouble {
  color: var(--color-muted);
}

.quiet-button {
  appearance: none;
  border: 0;
  padding: 0;
  background: none;
  color: var(--color-accent);
  font: var(--type-caption);
  letter-spacing: 0;
  cursor: pointer;
  white-space: nowrap;
}

.quiet-button:hover {
  text-decoration: underline;
}

/* ---- one computer ---- */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 0 var(--space-lg) var(--space-section);
}

.device {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: var(--space-xxl);
  padding: var(--space-xxl) 0;
  border-bottom: 1px solid var(--color-hairline);
}

.device:last-child {
  border-bottom: 0;
}

.device-head {
  position: sticky;
  top: 72px;
  align-self: start;
}

.device-name {
  margin: 0 0 var(--space-sm);
  font: var(--type-display);
  letter-spacing: var(--tracking-display);
  overflow-wrap: anywhere;
}

.presence {
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font: var(--type-body);
  letter-spacing: var(--tracking-tight);
  color: var(--color-ink);
}

.device.off .presence {
  color: var(--color-dim);
}

.meta {
  margin: var(--space-xs) 0 0;
  font: var(--type-caption);
  letter-spacing: 0;
  color: var(--color-dim);
}

.device.off .device-name {
  color: var(--color-muted);
}

/* ---- lists ---- */

.group + .group {
  margin-top: var(--space-xl);
}

.group-title {
  margin: 0 0 var(--space-xs);
  font: var(--type-caption);
  letter-spacing: 0;
  color: var(--color-dim);
}

.rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--color-hairline);
}

.row {
  display: grid;
  grid-template-columns: 10px minmax(0, 1fr) auto;
  align-items: baseline;
  column-gap: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-hairline);
}

.row .dot {
  align-self: center;
}

.row-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.row-where {
  color: var(--color-dim);
}

.row-state {
  font: var(--type-caption);
  letter-spacing: 0;
  color: var(--color-dim);
  white-space: nowrap;
  text-align: right;
}

.row.working .row-state {
  color: var(--color-accent);
}

a.row:hover .row-title,
a.row:focus-visible .row-title {
  color: var(--color-accent);
}

.recent .row {
  grid-template-columns: minmax(0, 1fr) auto;
}

.recent .row-title {
  color: var(--color-muted);
}

.empty {
  margin: 0;
  padding: var(--space-sm) 0;
  border-top: 1px solid var(--color-hairline);
  color: var(--color-dim);
}

.more {
  margin-top: var(--space-sm);
}

/* ---- status dot: blue = working, white = open and waiting, ring = not reachable ---- */

.dot {
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-ink);
}

.dot.working {
  background: var(--color-accent);
  animation: breathe 2.4s ease-in-out infinite;
}

.dot.off {
  background: none;
  border: 1.5px solid var(--color-dim);
}

@keyframes breathe {
  50% {
    opacity: 0.35;
  }
}

@media (prefers-reduced-motion: reduce) {
  .dot.working {
    animation: none;
  }
}

/* ---- nothing to show ---- */

.blank {
  padding: var(--space-section) 0;
  max-width: 34em;
}

.blank h2 {
  margin: 0 0 var(--space-sm);
  font: var(--type-display-small);
  letter-spacing: var(--tracking-display);
}

.blank p {
  margin: 0;
  color: var(--color-dim);
}

/* ---- sign in ---- */

.door {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-lg);
}

.door form {
  width: 100%;
  max-width: 340px;
}

.door h1 {
  margin: 0 0 var(--space-xxs);
  font: var(--type-display);
  letter-spacing: var(--tracking-display);
}

.door p {
  margin: 0 0 var(--space-lg);
  color: var(--color-dim);
}

.door .message {
  min-height: 1.47em;
  margin: var(--space-sm) 0 0;
  font: var(--type-caption);
  letter-spacing: 0;
  color: var(--color-muted);
}

.field {
  display: block;
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  background: var(--color-field);
  color: var(--color-ink);
  font: var(--type-body);
  letter-spacing: var(--tracking-tight);
}

.field::placeholder {
  color: var(--color-dim);
}

.field:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 0;
  border-radius: var(--radius-pill);
}

.action {
  appearance: none;
  display: block;
  width: 100%;
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border: 0;
  border-radius: var(--radius-pill);
  background: var(--color-action);
  color: var(--color-on-action);
  font: var(--type-body);
  letter-spacing: var(--tracking-tight);
  cursor: pointer;
  transition: transform 120ms ease;
}

.action:active {
  transform: scale(0.95);
}

.action:focus-visible {
  border-radius: var(--radius-pill);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---- narrow screens ---- */

@media (max-width: 860px) {
  .bar-inner,
  main {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .device {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-lg);
    padding: var(--space-xl) 0;
  }

  .device-head {
    position: static;
  }

  .device-name {
    font: var(--type-display-small);
    letter-spacing: var(--tracking-display);
  }

  .bar-inner {
    align-items: center;
  }

  /* an open session's state sits under its name, where a long one has room */
  .open .row {
    grid-template-columns: 10px minmax(0, 1fr);
    row-gap: var(--space-xxs);
  }

  .open .row-state {
    grid-column: 2;
    text-align: left;
  }

  .row-title {
    white-space: normal;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
  }
}