:root {
  color-scheme: dark;
  --bg: #0d1510;
  --panel: #17251d;
  --panel-2: #1d3025;
  --line: #31513d;
  --text: #eef6f0;
  --muted: #9eb4a5;
  --accent: #9ee56f;
  --accent-dark: #17250f;
  --danger: #ff9c91;
  --relay-on: #28c76f;
  --relay-off: #e43d3d;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; background: radial-gradient(circle at 80% 0, #1b3625 0, var(--bg) 40%); color: var(--text); }
button, input, select { font: inherit; }
.shell { width: min(1080px, calc(100% - 32px)); margin: 0 auto; padding: 32px 0 72px; }
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 40px; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 0; font-size: clamp(2rem, 5vw, 3.5rem); letter-spacing: -0.05em; }
h2 { font-size: 1.8rem; margin-bottom: 8px; }
h3 { margin-bottom: 4px; }
.eyebrow { margin-bottom: 8px; color: var(--accent); font-size: .72rem; font-weight: 800; letter-spacing: .18em; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.panel { background: color-mix(in srgb, var(--panel) 92%, transparent); border: 1px solid var(--line); border-radius: 20px; box-shadow: 0 24px 80px #0005; }
.login-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; padding: clamp(24px, 6vw, 64px); align-items: center; }
.stack { display: grid; gap: 18px; }
label { display: grid; gap: 7px; color: var(--muted); font-size: .86rem; font-weight: 700; }
input, select { width: 100%; border: 1px solid var(--line); border-radius: 10px; background: #0d1811; color: var(--text); padding: 12px 13px; outline: none; }
input:focus, select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px #9ee56f22; }
input[type="checkbox"] { width: 18px; height: 18px; accent-color: var(--accent); }
.check-label { display: flex; align-items: center; gap: 9px; }
.button { border: 1px solid var(--line); border-radius: 10px; padding: 11px 16px; color: var(--text); background: var(--panel-2); font-weight: 800; cursor: pointer; }
.button:hover { filter: brightness(1.12); }
.button:disabled { opacity: .45; cursor: wait; }
.button.primary { border-color: var(--accent); background: var(--accent); color: var(--accent-dark); }
.button.ghost { background: transparent; }
.button.danger { border-color: #7b3933; color: var(--danger); background: #321b18; }
.button.relay-on, .button.relay-off { min-width: 88px; color: #fff; font-size: 1rem; letter-spacing: .05em; }
.button.relay-on { border-color: #51df8d; background: var(--relay-on); }
.button.relay-off { border-color: #ff6b6b; background: var(--relay-off); }
.error { min-height: 1.2em; margin: 0; color: var(--danger); }
.summary { display: flex; gap: 36px; margin-bottom: 20px; }
.summary div { display: grid; gap: 3px; }
.device-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 410px), 1fr)); gap: 20px; }
.device { padding: 24px; }
.device-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; margin-bottom: 24px; }
.device-id { color: var(--muted); font: .8rem ui-monospace, monospace; }
.status { display: inline-flex; align-items: center; gap: 7px; border-radius: 99px; padding: 6px 10px; font-size: .78rem; font-weight: 800; background: #26342b; }
.status::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: #75877a; }
.status.online::before { background: var(--accent); box-shadow: 0 0 12px var(--accent); }
.relay { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 20px; }
.metric { padding: 14px; background: #101c15; border-radius: 12px; }
.metric span, .metric strong { display: block; }
.metric span { color: var(--muted); font-size: .76rem; margin-bottom: 4px; }
.schedule-form { padding-top: 20px; border-top: 1px solid var(--line); }
.cooler-form { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.cooler-form h3 { margin-bottom: 6px; }
.mode-help { min-height: 2.5em; margin: 8px 0 0; font-size: .84rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 15px 0; }
.actions { display: flex; flex-wrap: wrap; gap: 8px; }
.manual-control { display: flex; align-items: center; justify-content: space-between; gap: 16px; margin-top: 18px; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: #101c15; }
.manual-control p { margin: 4px 0 0; font-size: .8rem; }
.relay-actions { display: flex; flex-wrap: wrap; gap: 8px; }
.override { margin-top: 22px; padding-top: 20px; border-top: 1px solid var(--line); }
.override-row { display: grid; grid-template-columns: 110px 1fr; gap: 10px; margin: 12px 0; }
.toast { position: fixed; right: 20px; bottom: 20px; max-width: min(380px, calc(100% - 40px)); padding: 13px 16px; border-radius: 10px; background: var(--accent); color: var(--accent-dark); font-weight: 800; opacity: 0; transform: translateY(10px); pointer-events: none; transition: .2s; }
.toast.show { opacity: 1; transform: none; }

@media (max-width: 680px) {
  .shell { width: min(100% - 20px, 1080px); padding-top: 20px; }
  .topbar { margin-bottom: 24px; }
  .login-panel { grid-template-columns: 1fr; gap: 28px; }
  .summary { gap: 20px; }
  .form-grid { grid-template-columns: 1fr; }
  .manual-control { align-items: stretch; flex-direction: column; }
  .relay-actions .button { flex: 1; }
}