/* ============================================================
   SwitchBot — design system (light, friendly)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700&display=swap');

:root {
  /* canvas */
  --bg:        #F7F5F0;
  --surface:   #FFFFFF;
  --line:      #ECE7DD;
  --line-soft: #F4EFE5;

  /* ink */
  --ink:       #1F1B16;
  --ink-soft:  #5C564D;
  --ink-mute:  #8E8780;
  --ink-faint: #B8B0A4;

  /* accent — warm coral, used for primary actions and "ON" */
  --warm:      #E36A3D;
  --warm-deep: #C9542B;
  --warm-soft: #FCEAE2;

  /* cool — used sparingly, for temperature value */
  --cool:      #3672D4;
  --cool-soft: #E6EFFA;

  /* states */
  --ok:        #2EA37A;
  --ok-soft:   #DEF1E8;
  --warn:      #D89C12;
  --err:       #D8453B;
  --err-soft:  #FBE3E1;

  /* radii / shadow / spacing */
  --r-sm: 8px;
  --r:    14px;
  --r-lg: 20px;
  --r-xl: 28px;

  --shadow-sm: 0 1px 2px rgba(20,16,8,0.04);
  --shadow:    0 2px 8px rgba(20,16,8,0.06), 0 1px 2px rgba(20,16,8,0.04);
  --shadow-lg: 0 8px 28px rgba(20,16,8,0.08);

  --gutter: clamp(16px, 3vw, 28px);

  /* type */
  --font: 'Plus Jakarta Sans', system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: -0.005em;
}

a {
  color: var(--warm-deep);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .15s, color .15s;
}
a:hover { color: var(--warm); border-bottom-color: var(--warm-soft); }

::selection { background: var(--warm-soft); color: var(--warm-deep); }

h1, h2, h3, h4 { margin: 0; font-weight: 700; letter-spacing: -0.02em; }

p { margin: 0; }

/* ===== layout ===== */

.shell {
  max-width: 880px;
  margin: 0 auto;
  padding: var(--gutter);
}

.topbar {
  background: rgba(247, 245, 240, 0.85);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner {
  max-width: 880px;
  margin: 0 auto;
  padding: 14px var(--gutter);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand {
  font-weight: 700;
  color: var(--ink);
  border-bottom: 0;
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 17px;
}
.brand .dot {
  width: 9px; height: 9px; border-radius: 999px;
  background: var(--warm);
  box-shadow: 0 0 0 4px var(--warm-soft);
}
.nav { display: flex; gap: 4px; margin-left: 18px; }
.nav a {
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 14px;
  border-bottom: 0;
}
.nav a:hover { color: var(--ink); background: var(--line-soft); }
.nav a.active { color: var(--ink); background: var(--surface); box-shadow: var(--shadow-sm); }
.topbar-inner .grow { flex: 1; }

/* ===== card ===== */

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  padding: 24px 26px;
}
.card + .card { margin-top: 14px; }
.card-tight { padding: 18px 20px; }

.card-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--ink-mute);
  text-transform: none;
  margin-bottom: 6px;
}

/* ===== button ===== */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font: inherit; font-weight: 600; font-size: 14px;
  cursor: pointer;
  transition: transform .08s ease, background .15s, border-color .15s, box-shadow .15s;
  box-shadow: var(--shadow-sm);
}
.btn:hover { background: var(--line-soft); }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn-primary {
  background: var(--warm);
  color: white;
  border-color: var(--warm);
  box-shadow: 0 2px 6px rgba(227,106,61,0.25);
}
.btn-primary:hover { background: var(--warm-deep); border-color: var(--warm-deep); }

.btn-cool {
  background: var(--cool);
  color: white;
  border-color: var(--cool);
}
.btn-cool:hover { background: #295BB6; border-color: #295BB6; }

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-soft);
  box-shadow: none;
}
.btn-ghost:hover { color: var(--ink); background: var(--line-soft); }

.btn-link {
  background: transparent; border: 0; box-shadow: none;
  color: var(--warm-deep); padding: 4px 6px;
  font-weight: 500;
}
.btn-link:hover { color: var(--warm); background: transparent; }

.btn-big {
  padding: 16px 28px;
  font-size: 16px;
  border-radius: 999px;
}

/* ===== badge ===== */

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px; font-weight: 600;
  background: var(--line-soft); color: var(--ink-soft);
}
.badge.warm { background: var(--warm-soft); color: var(--warm-deep); }
.badge.cool { background: var(--cool-soft); color: var(--cool); }
.badge.ok   { background: var(--ok-soft); color: var(--ok); }
.badge.err  { background: var(--err-soft); color: var(--err); }
.badge .pip { width: 6px; height: 6px; border-radius: 999px; background: currentColor; }
.badge.live .pip {
  background: var(--ok);
  box-shadow: 0 0 0 0 rgba(46,163,122,0.5);
  animation: pulse 1.6s infinite;
}
@keyframes pulse {
  70%  { box-shadow: 0 0 0 8px rgba(46,163,122,0); }
  100% { box-shadow: 0 0 0 0 rgba(46,163,122,0); }
}

/* ===== toggle (iOS-style) ===== */

.toggle { position: relative; display: inline-block; width: 52px; height: 32px; flex: none; }
.toggle input { opacity: 0; width: 0; height: 0; position: absolute; }
.toggle .track {
  position: absolute; cursor: pointer; inset: 0;
  background: #D6D2C7;
  transition: background .2s;
  border-radius: 999px;
}
.toggle .track::before {
  content: '';
  position: absolute;
  height: 26px; width: 26px;
  left: 3px; top: 3px;
  background: white;
  transition: transform .2s;
  border-radius: 999px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}
.toggle input:checked + .track { background: var(--ok); }
.toggle input:checked + .track::before { transform: translateX(20px); }

/* ===== forms ===== */

label.lbl {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  margin-bottom: 6px;
}
input[type="text"], input[type="number"], input[type="time"], select, textarea {
  width: 100%;
  padding: 11px 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  color: var(--ink);
  font: inherit; font-size: 15px;
  transition: border-color .15s, box-shadow .15s;
}
input:focus, select:focus, textarea:focus {
  outline: 0;
  border-color: var(--warm);
  box-shadow: 0 0 0 3px var(--warm-soft);
}
.field { margin-bottom: 14px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .field-row { grid-template-columns: 1fr; } }

/* ===== utility ===== */

.muted { color: var(--ink-mute); }
.faint { color: var(--ink-faint); }
.row { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.spread { display: flex; justify-content: space-between; align-items: center; gap: 16px; }

.flash-stack { margin: 14px 0; display: flex; flex-direction: column; gap: 8px; }
.flash {
  padding: 12px 16px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--surface);
  font-size: 14px;
}
.flash.success { border-color: rgba(46,163,122,0.32); background: var(--ok-soft); color: var(--ok); }
.flash.error   { border-color: rgba(216,69,59,0.3); background: var(--err-soft); color: var(--err); }

.hidden { display: none !important; }

@media (max-width: 720px) {
  body { font-size: 15px; }
  .card { padding: 18px 18px; }
}