:root {
  --bg: #f3f8f4;
  --card: #ffffff;
  --soft: #eef4ef;
  --text: #17231c;
  --muted: #536257;
  --line: #dbe6dd;
  --line-strong: #b9cbbd;
  --accent: #0f6e56;
  --accent-soft: #e1f5ee;
  --accent-text: #085041;
  --on-accent: #ffffff;
  --water-b: #e6f1fb; --water-t: #0c447c;
  --power-b: #faeeda; --power-t: #633806;
  --co2-b: #eaf3de; --co2-t: #27500a;
  --cash-b: #eeedfe; --cash-t: #3c3489;
  --plastic-b: #fbeaf0; --plastic-t: #72243e;
  --font: 'Nunito', system-ui, -apple-system, 'Segoe UI', sans-serif;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101814; --card: #18221c; --soft: #212d25; --text: #ecf3ee; --muted: #a9b9ad;
    --line: #2c3a31; --line-strong: #435449; --accent: #5dcaa5; --accent-soft: #085041; --accent-text: #9fe1cb; --on-accent: #06281f;
    --water-b: #0c447c; --water-t: #b5d4f4;
    --power-b: #633806; --power-t: #fac775;
    --co2-b: #27500a; --co2-t: #c0dd97;
    --cash-b: #3c3489; --cash-t: #cecbf6;
    --plastic-b: #72243e; --plastic-t: #f4c0d1;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.55; }
button, input, select { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--card); padding: 8px 12px; border-radius: 10px; }
.skip:focus { left: 8px; }

.top, main, .foot { max-width: 920px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; align-items: center; gap: 14px; padding-top: 24px; padding-bottom: 8px; }
.sprout { width: 60px; height: 60px; flex: none; }
h1 { margin: 0; font-size: 1.9rem; font-weight: 800; }
h2 { margin: 0; font-size: 1.2rem; font-weight: 800; }
.lede { margin: 2px 0 0; color: var(--muted); font-size: 1.05rem; }
main { display: flex; flex-direction: column; gap: 16px; padding-bottom: 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 18px 20px; }
.row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.hint { color: var(--muted); font-size: 0.9rem; margin: 4px 0 12px; font-weight: 400; }
.section-title { margin-top: 6px; }

.chip { min-height: 36px; padding: 0 14px; border-radius: 999px; border: 1px solid var(--line-strong); background: var(--card); display: inline-flex; align-items: center; gap: 6px; font-size: 0.9rem; cursor: pointer; }
.chip[aria-pressed='true'] { background: var(--accent-soft); color: var(--accent-text); border-color: var(--accent); font-weight: 700; }

/* Totals */
.totals-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; align-items: center; }
.scale { display: flex; flex-direction: column; gap: 4px; }
.scale-label { font-size: 0.8rem; color: var(--muted); }
.scale input { width: 84px; min-height: 36px; border-radius: 999px; border: 1px solid var(--line-strong); padding: 0 10px; background: var(--card); }
.metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-top: 14px; }
.metric { border-radius: 16px; padding: 12px 14px; }
.metric .label { font-size: 0.85rem; display: flex; align-items: center; gap: 6px; }
.metric .value { font-size: 1.6rem; font-weight: 800; line-height: 1.2; }
.metric .unit { font-size: 0.85rem; }
.m-co2 { background: var(--co2-b); color: var(--co2-t); }
.m-water { background: var(--water-b); color: var(--water-t); }
.m-power { background: var(--power-b); color: var(--power-t); }
.m-cash { background: var(--cash-b); color: var(--cash-t); }
.m-plastic { background: var(--plastic-b); color: var(--plastic-t); }
.equiv { margin: 12px 0 0; font-size: 0.95rem; color: var(--muted); }
.equiv b { color: var(--text); }

/* Switch cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 12px; }
.switch { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 16px; display: flex; flex-direction: column; gap: 10px; }
.switch.on { border: 2px solid var(--accent); padding: 15px; }
.switch-head { display: flex; gap: 12px; align-items: flex-start; }
.switch-icon { width: 44px; height: 44px; border-radius: 14px; background: var(--accent-soft); color: var(--accent-text); display: flex; align-items: center; justify-content: center; font-size: 1.5rem; flex: none; }
.switch-head h3 { margin: 0; font-size: 1.05rem; font-weight: 800; }
.switch-head p { margin: 2px 0 0; font-size: 0.88rem; color: var(--muted); }
.toggle { margin-left: auto; }
.slider { display: flex; flex-direction: column; gap: 2px; font-size: 0.88rem; }
.slider-top { display: flex; justify-content: space-between; gap: 8px; }
.slider-top output { font-weight: 800; }
input[type='range'] { width: 100%; accent-color: var(--accent); height: 28px; }
select { min-height: 36px; border-radius: 10px; border: 1px solid var(--line-strong); background: var(--card); padding: 0 8px; }
.yields { display: flex; flex-wrap: wrap; gap: 6px; }
.yield { font-size: 0.8rem; padding: 3px 10px; border-radius: 999px; font-weight: 700; }
.switch details { font-size: 0.82rem; color: var(--muted); }
.switch summary { cursor: pointer; font-weight: 700; }
.switch details p { margin: 6px 0 0; }

/* Habit tracker */
.small { font-size: 0.85rem; color: var(--muted); }
.today { background: var(--accent-soft); color: var(--accent-text); border-radius: 18px; padding: 14px 16px; margin-top: 10px; }
.today-head { display: flex; flex-direction: column; gap: 2px; margin-bottom: 10px; }
.today-head .small { color: inherit; }
.today-msg { font-weight: 800; font-size: 1.05rem; }
.chip.check { background: var(--card); color: var(--text); min-height: 44px; }
.chip.check[aria-pressed='true'] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }
.chip.icon-only { width: 40px; padding: 0; justify-content: center; }
.chip:disabled { opacity: 0.4; cursor: default; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-top: 14px; }
.stat { background: var(--soft); border-radius: 16px; padding: 12px 14px; display: grid; grid-template-columns: auto 1fr; column-gap: 10px; align-items: center; }
.stat i { grid-row: span 2; font-size: 1.7rem; color: var(--accent); }
.stat b { font-size: 1.35rem; font-weight: 800; line-height: 1.2; }
.stat span { font-size: 0.8rem; color: var(--muted); }
.st-flame { background: var(--power-b); }
.st-flame i, .st-flame b, .st-flame span { color: var(--power-t); }
.st-saved { background: var(--co2-b); }
.st-saved i, .st-saved b, .st-saved span { color: var(--co2-t); }

.tracker-cols { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: 18px; margin-top: 16px; }
@media (max-width: 680px) { .tracker-cols { grid-template-columns: 1fr; } }
.tracker-cols h3 { margin: 0; font-size: 1rem; font-weight: 800; }
.cal { max-width: 440px; width: 100%; }
.cal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 8px; }
.cal-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 5px; }
.cal-wd { font-size: 0.72rem; color: var(--muted); text-align: center; font-weight: 700; }
.cal-cell { aspect-ratio: 1; border-radius: 10px; border: 1px solid var(--line); background: var(--card); position: relative; padding: 0; cursor: pointer; display: flex; flex-direction: column; align-items: center; justify-content: center; font-size: 0.8rem; min-width: 0; }
.cal-cell.blank { border: 0; background: none; cursor: default; }
.cal-cell:disabled { opacity: 0.35; cursor: default; }
.cal-cell.lv1 { background: #c8eadc; border-color: #c8eadc; color: #085041; }
.cal-cell.lv2 { background: #8fd6b8; border-color: #8fd6b8; color: #04342c; }
.cal-cell.lv3 { background: #3fb68c; border-color: #3fb68c; color: #04342c; }
.cal-cell.lv4 { background: #0f6e56; border-color: #0f6e56; color: #ffffff; }
.cal-cell.today { outline: 2px solid var(--text); outline-offset: 1px; }
.cal-cell.selected { box-shadow: 0 0 0 3px var(--power-t) inset; }
.cal-num { font-weight: 700; }
.cal-dot { font-size: 0.68rem; font-weight: 800; line-height: 1; }
.cal-legend { display: flex; align-items: center; gap: 4px; font-size: 0.72rem; color: var(--muted); margin-top: 8px; justify-content: flex-end; }
.cal-legend .cal-cell { width: 14px; height: 14px; aspect-ratio: auto; border-radius: 4px; cursor: default; }
.day-panel .row { margin-top: 6px; }
.badges { list-style: none; padding: 0; margin: 8px 0 0; display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.badge { display: flex; gap: 8px; align-items: center; background: var(--soft); border-radius: 12px; padding: 8px 10px; font-size: 0.78rem; color: var(--muted); line-height: 1.3; }
.badge i { font-size: 1.4rem; flex: none; }
.badge.got { background: var(--power-b); color: var(--power-t); }
.badge b { font-weight: 800; }
.actions { margin-top: 14px; }

/* Settings */
.settings summary, details.card summary { cursor: pointer; font-weight: 800; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
details.card summary .hint { margin: 0; }
.settings-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 12px 16px; margin-top: 14px; }
.settings-grid label { display: flex; flex-direction: column; gap: 4px; font-size: 0.88rem; color: var(--muted); }
.settings-grid input[type='number'] { min-height: 40px; border-radius: 10px; border: 1px solid var(--line-strong); background: var(--card); padding: 0 10px; }
.sources { font-size: 0.9rem; }
.sources li { margin: 6px 0; }
.sources a { color: var(--accent); }

.foot { color: var(--muted); font-size: 0.8rem; padding-bottom: 32px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

@media (prefers-color-scheme: dark) {
  .cal-cell.lv1 { background: #123d30; border-color: #123d30; color: #9fe1cb; }
  .cal-cell.lv2 { background: #146b52; border-color: #146b52; color: #e1f5ee; }
  .cal-cell.lv3 { background: #1d9e75; border-color: #1d9e75; color: #04342c; }
  .cal-cell.lv4 { background: #5dcaa5; border-color: #5dcaa5; color: #04342c; }
}

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

@media print {
  body { background: #fff; color: #000; }
  .top .lede, .scale, #switches, .section-title, .hint, details, .actions, .foot, .skip, .cal-head button, .cal-legend { display: none !important; }
  .card { border: 0; padding: 0; }
  .metric { border: 1px solid #999; }
}