:root {
  --bg: #0b0f17;
  --card: #111827;
  --muted: #9ca3af;
  --accent: #34d399;
  --danger: #f87171;
  --border: #1f2937;
  --text: #e5e7eb;
  --blue: #38bdf8;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box }

body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

a { color: var(--accent); text-decoration: none }

/* ============================= AUTH ============================= */
.auth-body {
  display: flex;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
  padding: 24px;            /* keeps the card off the screen edges on mobile */
}

/* Brand + card stacked and centered — no hard-coded offsets */
.auth-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: 380px;
}

.auth-brand {
  text-align: center;
}

.auth-brand img {
  height: 42px;
  width: auto;
  max-width: 100%;
}

.auth-brand__sub {
  margin: .55rem 0 0;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--muted);
}

.auth-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 32px;
  width: 100%;              /* fills .auth-wrap, so it shrinks on small screens */
}

.auth-logo { font-weight: 700; font-size: 15px; margin-bottom: 18px }
.auth-card h1 { font-size: 20px; margin: 0 0 4px }
.auth-sub { color: var(--muted); font-size: 13px; margin: 0 0 20px }

.auth-card label {
  display: block;
  font-size: 12px;
  color: var(--muted);
  margin: 14px 0 6px;
}

.auth-card input {
  width: 100%;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #0b0f17;
  color: var(--text);
  font-size: 16px;          /* 16px stops iOS from zooming on focus */
}

.auth-card button {
  width: 100%;
  margin-top: 20px;
  padding: 11px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #062b1f;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}

.auth-err {
  background: #3b1113;
  border: 1px solid #7f1d1d;
  color: #fecaca;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 12px;
}

.auth-alt { margin-top: 16px; text-align: center; font-size: 13px; color: var(--muted) }

@media (max-width: 480px) {
  .auth-card { padding: 24px 20px; }
  .auth-brand img { height: 36px; }
}

/* ============================= HEADER ============================= */
header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px }
.brand .logo {
  background: #0f2b22; color: var(--accent); border-radius: 8px;
  padding: 4px 9px; font-weight: 700;
}
.spacer { flex: 1 }

.pill {
  display: inline-flex; align-items: center; gap: 6px; font-size: 12px;
  padding: 5px 11px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--card);
}
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted) }
.dot.ok { background: var(--accent) }
.dot.bad { background: var(--danger) }
.clock { font-variant-numeric: tabular-nums; color: var(--muted); font-size: 13px }
.user { font-size: 13px; color: var(--muted) }

/* ============================= BUTTONS ============================= */
.btn {
  background: var(--card); border: 1px solid var(--border); color: var(--text);
  padding: 7px 13px; border-radius: 8px; cursor: pointer; font-size: 13px;
  text-decoration: none; display: inline-block;
}
.btn:hover { border-color: var(--accent) }
.btn.primary { background: var(--blue); color: #06242f; border-color: var(--blue); font-weight: 600 }
.btn.ghost { color: var(--danger); border-color: #7f1d1d }

/* ============================= CARDS ============================= */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 24px;
  padding: 24px;
  max-width: 1400px;
  margin: 0 auto;
}

.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 22px;
}

.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px }
.dev-name {
  font-family: var(--mono); font-size: 17px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
}
.edit { cursor: pointer; color: var(--muted); font-size: 13px }
.edit:hover { color: var(--accent) }
.status { font-size: 12px; display: flex; align-items: center; gap: 6px; color: var(--muted) }

.reading { font-size: 64px; font-weight: 800; color: var(--accent); line-height: 1; margin: 10px 0 2px }
.reading .unit { font-size: 20px; color: var(--muted); font-weight: 500 }
.reading.alarm { color: var(--danger) }

.notice {
  margin: 10px 0 2px; padding: 9px 12px; border-radius: 8px; font-size: 13px;
  background: #3b2a11; border: 1px solid #7c5312; color: #fcd9a3;
}

.meta { display: flex; gap: 40px; margin: 14px 0 6px }
.meta .lbl { font-size: 11px; color: var(--muted) }
.meta .val { font-family: var(--mono); font-size: 15px }

.chart-wrap { position: relative; height: 170px; margin: 8px 0 }
.hint { font-size: 11px; color: var(--muted); text-align: right; margin-top: 2px }

.controls { display: flex; gap: 18px; align-items: flex-end; margin-top: 16px; flex-wrap: wrap }
.field { display: flex; flex-direction: column; gap: 5px }
.field label { font-size: 11px; color: var(--muted) }
.field input {
  width: 120px; padding: 8px 10px; border-radius: 8px; border: 1px solid var(--border);
  background: #0b0f17; color: var(--text); font-size: 14px;
}
.controls .field input { width: 90px }

.row2 {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: 18px; flex-wrap: wrap; gap: 10px;
}
.hooter { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--muted) }
.actions { display: flex; gap: 10px; flex-wrap: wrap }

/* ============================= TOAST ============================= */
.toast {
  position: fixed; bottom: 20px; right: 20px; background: var(--card);
  border: 1px solid var(--border); border-left: 3px solid var(--accent);
  padding: 12px 16px; border-radius: 8px; font-size: 13px;
  opacity: 0; transform: translateY(10px); transition: .25s;
  max-width: 340px; z-index: 60;
}
.toast.show { opacity: 1; transform: none }
.toast.err { border-left-color: var(--danger) }

/* ============================= MODALS ============================= */
.modal {
  position: fixed; inset: 0; background: rgba(0, 0, 0, .6);
  display: none; align-items: center; justify-content: center; z-index: 50;
  padding: 16px;
}
.modal.show { display: flex }
.modal .box {
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  padding: 22px; width: min(1000px, 94vw); max-height: 92vh; overflow: auto;
}
.modal .box.small { width: min(520px, 92vw) }
.modal h3 { margin: 0 0 4px; font-family: var(--mono) }
.modal .bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px }
.modal-chart { position: relative; height: 60vh }

.g-controls { display: flex; align-items: flex-end; gap: 14px; margin-bottom: 12px; flex-wrap: wrap }
.g-custom { display: flex; align-items: flex-end; gap: 10px; flex-wrap: wrap }
.g-meta { font-size: 12px; color: var(--muted) }

.seg { display: inline-flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; flex-wrap: wrap }
.seg button { background: transparent; border: 0; color: var(--muted); padding: 7px 12px; cursor: pointer; font-size: 12px }
.seg button.active { background: var(--blue); color: #06242f; font-weight: 600 }

/* ============================= RESPONSIVE ============================= */
@media (max-width: 640px) {
  header { gap: 10px; padding: 12px 16px; }
  .clock { order: 3; }
  .grid { grid-template-columns: 1fr; gap: 16px; padding: 16px; }
  .card { padding: 18px; }
  .reading { font-size: 48px; }
  .reading .unit { font-size: 16px; }
  .meta { gap: 24px; }
  .row2 { align-items: stretch; }
  .actions { width: 100%; }
  .actions .btn { flex: 1; text-align: center; }
  .modal-chart { height: 52vh; }
  .g-controls { align-items: stretch; }
  .g-custom .field { flex: 1; }
  .g-custom .field input { width: 100%; }
}

@media (max-width: 400px) {
  .meta { flex-direction: column; gap: 8px; }
  .reading { font-size: 42px; }
}