:root {
  --bg: #fbf7ef;
  --card: #ffffff;
  --ink: #1f2a1f;
  --muted: #5f6b5f;
  --line: #e6e1d4;
  --accent: #2f8f5b;
  --accent-ink: #ffffff;
  --accent-soft: #e2f3e8;
  --warn: #c2410c;
  --warn-soft: #fdebd9;
  --keep: #8a8f8a;
  --shadow: 0 6px 24px rgba(31, 42, 31, 0.08);
  --radius: 18px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #131a14;
    --card: #1b241c;
    --ink: #eef3ee;
    --muted: #a7b3a7;
    --line: #2b382d;
    --accent: #5bc48a;
    --accent-ink: #0d1a10;
    --accent-soft: #1f3a29;
    --warn: #f7a26a;
    --warn-soft: #3a2415;
    --keep: #7d877d;
    --shadow: 0 6px 24px rgba(0, 0, 0, 0.35);
  }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Nunito", system-ui, -apple-system, "Segoe UI", sans-serif;
  line-height: 1.5;
}
h1, h2, h3 { font-family: "Fredoka", "Nunito", system-ui, sans-serif; font-weight: 600; letter-spacing: 0.01em; margin: 0 0 0.4em; }
h1 { font-size: clamp(2rem, 5vw, 3.2rem); line-height: 1.1; }
h2 { font-size: 1.35rem; }
h3 { font-size: 1.1rem; margin-top: 1.5rem; }
a { color: var(--accent); }
button { font: inherit; }

.wrap { width: min(1100px, 100% - 32px); margin-inline: auto; }

/* Hero */
.hero { padding: 48px 0 28px; background: radial-gradient(1200px 400px at 20% -20%, var(--accent-soft), transparent 60%); }
.eyebrow { font-family: "Fredoka", sans-serif; font-weight: 700; color: var(--accent); margin: 0 0 6px; font-size: 1.1rem; }
.lede { max-width: 60ch; color: var(--muted); font-size: 1.08rem; margin: 0 0 18px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.try { color: var(--muted); font-weight: 700; }

.btn {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  border-radius: 999px;
  padding: 10px 18px;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.08s ease, background 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.55; cursor: default; transform: none; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.btn.ghost { background: transparent; }
.btn.small { padding: 7px 14px; font-size: 0.92rem; }
.btn:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

/* Layout */
.layout { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 24px; align-items: start; padding-bottom: 40px; }
@media (max-width: 860px) { .layout { grid-template-columns: 1fr; } }

/* Picker */
.rooms { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 14px; }
.room {
  border: 1px solid var(--line); background: var(--card); color: var(--ink);
  border-radius: 999px; padding: 8px 14px; cursor: pointer; font-weight: 700;
  display: inline-flex; align-items: center; gap: 6px;
}
.room.active { background: var(--accent); color: var(--accent-ink); border-color: transparent; }
.pill { background: rgba(255,255,255,0.35); border-radius: 999px; padding: 0 7px; font-size: 0.8rem; }
.room:not(.active) .pill { background: var(--accent-soft); color: var(--accent); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 10px; }
.device {
  display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 12px; box-shadow: var(--shadow);
}
.device.on { border-color: var(--accent); background: var(--accent-soft); }
.device .emoji { font-size: 1.7rem; }
.device .name { font-weight: 700; line-height: 1.2; }
.device .meta { color: var(--muted); font-size: 0.82rem; margin-top: 3px; }
.stepper { display: inline-flex; align-items: center; gap: 4px; }
.stepper button {
  width: 32px; height: 32px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer; font-size: 1.1rem; line-height: 1;
}
.stepper button:disabled { opacity: 0.35; cursor: default; }
.stepper output { min-width: 1.4em; text-align: center; font-weight: 700; }

/* Summary */
.summary {
  position: sticky; top: 16px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
  max-height: calc(100vh - 32px); overflow: auto;
}
@media (max-width: 860px) { .summary { position: static; max-height: none; } }
.empty { color: var(--muted); }

.region { margin-bottom: 14px; }
.region label { display: block; font-weight: 700; margin-bottom: 6px; }
.region select {
  width: 100%; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font: inherit; font-size: 1rem;
}

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat { background: var(--bg); border-radius: 14px; padding: 12px; display: flex; flex-direction: column; }
.stat.big { grid-column: 1 / -1; background: var(--warn-soft); }
.stat .num { font-family: "Fredoka", sans-serif; font-size: 1.6rem; font-weight: 700; line-height: 1.1; }
.stat.big .num { font-size: 2.6rem; color: var(--warn); }
.stat .lbl { color: var(--muted); font-size: 0.82rem; }
.possible { color: var(--muted); font-size: 0.95rem; margin: 10px 0 0; }

/* Chart */
.chart-wrap { margin-top: 12px; }
.chart { display: flex; height: 18px; border-radius: 999px; overflow: hidden; background: var(--bg); }
.chart > div { height: 100%; min-width: 2px; transition: width 0.4s ease; }
.legend { list-style: none; margin: 8px 0 0; padding: 0; display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 0.8rem; color: var(--muted); }
.legend li { display: inline-flex; align-items: center; gap: 5px; }
.legend i { width: 10px; height: 10px; border-radius: 3px; display: inline-block; }
.legend b { color: var(--ink); }

/* Saved */
.saved { margin-top: 14px; padding: 12px; border-radius: 14px; background: var(--accent-soft); }
.saved .bar { height: 10px; border-radius: 999px; background: rgba(0,0,0,0.08); overflow: hidden; }
.saved .bar > div { height: 100%; width: 0; background: var(--accent); transition: width 0.4s ease; }
.saved p { margin: 8px 0 10px; font-weight: 600; }
.saved-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.saved .help { margin: 8px 0 0; font-weight: 400; }

/* Strips */
.strips { margin-top: 6px; }
.strips .help { margin: -4px 0 10px; }
.strip-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.strip-list li { border: 1px solid var(--line); border-radius: 14px; padding: 10px 12px; background: var(--bg); }
.strip-head { display: flex; justify-content: space-between; gap: 8px; font-weight: 700; }
.strip-head b { color: var(--warn); font-family: "Fredoka", sans-serif; }
.strip-devs { font-size: 0.85rem; color: var(--muted); margin: 4px 0; }
.strip-pay { font-size: 0.88rem; margin-bottom: 8px; }

/* List */
.list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.row {
  display: grid; grid-template-columns: auto 1fr auto; gap: 10px; align-items: start;
  border: 1px solid var(--line); border-radius: 14px; padding: 10px;
}
.row.done { background: var(--accent-soft); border-color: var(--accent); }
.row.done .title { text-decoration: line-through; opacity: 0.75; }
.row.keep { opacity: 0.75; }
.check { display: flex; flex-direction: column; align-items: center; gap: 4px; cursor: pointer; }
.check input { width: 22px; height: 22px; accent-color: var(--accent); margin: 0; }
.rank { font-size: 0.75rem; color: var(--muted); font-weight: 700; }
.title { font-weight: 700; }
.x { color: var(--muted); font-weight: 600; }
.sub { font-size: 0.88rem; color: var(--muted); }
.src { font-size: 0.76rem; color: var(--muted); margin-top: 2px; }
.nums { text-align: right; }
.cost { font-family: "Fredoka", sans-serif; font-weight: 700; font-size: 1.15rem; color: var(--warn); }
.cost small { font-size: 0.7rem; color: var(--muted); font-weight: 600; }
.kwh { font-size: 0.78rem; color: var(--muted); white-space: nowrap; }

/* Scale-up */
.scale { margin-top: 16px; padding: 12px 14px; border-radius: 14px; background: var(--bg); border: 1px dashed var(--line); }
.scale h3 { margin-top: 0; }
.scale p { margin: 0; }
.scale b { color: var(--accent); }

/* Price */
.price { margin-top: 18px; padding-top: 14px; border-top: 1px dashed var(--line); }
.price label { display: block; font-weight: 700; margin-bottom: 6px; }
.price-row { display: flex; gap: 8px; align-items: center; }
.price input {
  flex: 1; min-width: 0; padding: 10px 12px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--bg); color: var(--ink); font: inherit; font-size: 1rem;
}
.help { color: var(--muted); font-size: 0.82rem; margin: 6px 0 0; }
.error { color: var(--warn); font-size: 0.85rem; margin: 4px 0 0; min-height: 1em; }

/* Footer */
.foot { padding: 20px 0 48px; color: var(--muted); font-size: 0.92rem; border-top: 1px solid var(--line); }
.foot h2 { color: var(--ink); font-size: 1.1rem; }
.foot ul { padding-left: 18px; }
.foot li { margin-bottom: 6px; }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
  html { scroll-behavior: auto; }
}