:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-alt: #eef1f4;
  --text: #1a2027;
  --text-muted: #5b6570;
  --border: #dde3e8;
  --primary: #1d7a8c;
  --primary-hover: #165f6d;
  --danger: #c0392b;
  --danger-bg: #fceceb;
  --success: #1e8e5a;
  --success-bg: #e8f7ef;
  --warn: #b8860b;
  --warn-bg: #fdf3d9;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12171c;
    --surface: #1b232a;
    --surface-alt: #222c34;
    --text: #eef2f5;
    --text-muted: #9aa7b1;
    --border: #2c3740;
    --primary: #3fb6c9;
    --primary-hover: #63c8d8;
    --danger: #e5776a;
    --danger-bg: #3a2020;
    --success: #4fce93;
    --success-bg: #16332a;
    --warn: #e0b23a;
    --warn-bg: #3a2f12;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.4), 0 1px 2px rgba(0, 0, 0, 0.3);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.45;
}

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

.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem;
}

/* --- top nav --- */
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav::-webkit-scrollbar {
  display: none;
}

.nav a,
.link-button {
  white-space: nowrap;
}

@media (max-width: 480px) {
  .nav {
    gap: 0.65rem;
  }
}

.nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  padding: 0.4rem 0.2rem;
  border-bottom: 2px solid transparent;
}

.nav a.active,
.nav a:hover {
  color: var(--text);
  border-bottom-color: var(--primary);
}

.link-button {
  background: none;
  border: none;
  color: var(--text-muted);
  font: inherit;
  cursor: pointer;
  padding: 0.4rem 0.2rem;
}

.link-button:hover {
  color: var(--danger);
}

.logout-form {
  display: inline;
}

/* --- headings / hints --- */
h1 {
  font-size: 1.4rem;
  margin: 0 0 0.25rem;
}

h2 {
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}

.subtitle {
  color: var(--text-muted);
  margin: 0 0 1.25rem;
}

.hint {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 1rem;
}

/* --- auth pages --- */
.auth-card {
  max-width: 380px;
  margin: 3rem auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.75rem;
}

/* --- alerts --- */
.alert {
  padding: 0.65rem 0.9rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.alert-error {
  background: var(--danger-bg);
  color: var(--danger);
}

.alert-success {
  background: var(--success-bg);
  color: var(--success);
}

.alert-warn {
  background: var(--warn-bg);
  color: var(--warn);
}

/* --- forms --- */
form label {
  display: block;
  font-weight: 600;
  font-size: 0.85rem;
  margin: 0.9rem 0 0.3rem;
}

form label:first-of-type {
  margin-top: 0;
}

input[type="text"],
input[type="password"],
input[type="number"],
input[type="time"] {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
}

input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 1px;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: var(--radius);
  padding: 0.6rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.btn-secondary {
  background: var(--surface-alt);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-block {
  display: block;
  width: 100%;
  margin-top: 1.25rem;
}

.btn-sm {
  padding: 0.35rem 0.7rem;
  font-size: 0.85rem;
}

/* --- dashboard --- */
.status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-online {
  background: var(--success-bg);
  color: var(--success);
}

.badge-offline,
.badge-unknown {
  background: var(--warn-bg);
  color: var(--warn);
}

.badge-on {
  background: var(--success-bg);
  color: var(--success);
}

.badge-off {
  background: var(--surface-alt);
  color: var(--text-muted);
}

.actions {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem 1.1rem;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.card-title {
  font-weight: 700;
  text-transform: capitalize;
}

.card-sub {
  color: var(--text-muted);
  font-size: 0.85rem;
  margin-top: 0.4rem;
}

/* segmented 3-way override control */
.segmented {
  display: flex;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: 0.6rem;
}

.segmented button {
  flex: 1;
  border: none;
  background: var(--surface);
  color: var(--text-muted);
  padding: 0.5rem 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  border-right: 1px solid var(--border);
}

.segmented button:last-child {
  border-right: none;
}

.segmented button.selected {
  background: var(--primary);
  color: #fff;
}

/* day chip toggles */
.day-chips {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-top: 0.3rem;
}

.day-chip input {
  display: none;
}

.day-chip span {
  display: inline-block;
  padding: 0.4rem 0.6rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  user-select: none;
}

.day-chip input:checked + span {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}

.output-form {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  background: var(--surface);
}

.time-row {
  display: flex;
  gap: 0.75rem;
}

.time-row > div {
  flex: 1;
}

.checkbox-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.checkbox-row input {
  width: auto;
}

.checkbox-row label {
  margin: 0;
  font-weight: 500;
}

.float-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .float-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}