/* Solaire de balcon — feuille de style unique.
   Palette : béton clair, encre, ardoise ; le jaune « soleil » est réservé à la production,
   le vert « sauge » aux économies. */

:root {
  --beton: #f3f4f1;
  --papier: #ffffff;
  --encre: #1b2a33;
  --ardoise: #56636b;
  --filet: #d7ddda;
  --soleil: #d9970f;
  --soleil-doux: #fbefd3;
  --sauge: #2b755f;
  --sauge-doux: #e3f0eb;
  --focus: #1f5fbf;
  --danger: #a3341f;
  --radius: 6px;
  --measure: 68ch;
  --font: "Avenir Next", Avenir, "Segoe UI Variable Text", "Segoe UI", "Helvetica Neue", system-ui, sans-serif;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --beton: #141b1f;
    --papier: #1b242a;
    --encre: #e6ebe8;
    --ardoise: #a3afb4;
    --filet: #2e3a41;
    --soleil: #f0b43a;
    --soleil-doux: #3a2f17;
    --sauge: #6cc3a6;
    --sauge-doux: #19302a;
    --focus: #8db4ff;
    --danger: #f08a73;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--beton);
  color: var(--encre);
  font: 17px/1.6 var(--font);
  font-variant-numeric: tabular-nums;
}
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
img, svg { max-width: 100%; }

.wrap { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.skip { position: absolute; left: -999px; top: 0; background: var(--papier); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- En-tête ---------- */
.site-header { border-bottom: 1px solid var(--filet); background: var(--papier); }
.site-header .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 24px; min-height: 64px; }
.wordmark { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.05rem; letter-spacing: -0.01em; text-decoration: none; }
.wordmark-sun {
  width: 26px; height: 18px; position: relative; display: inline-block;
  border-bottom: 3px solid var(--encre);
}
.wordmark-sun::before {
  content: ""; position: absolute; left: 4px; bottom: 0; width: 18px; height: 9px;
  border-radius: 18px 18px 0 0; background: var(--soleil);
}
.site-header nav { display: flex; gap: 20px; }
.site-header nav a { text-decoration: none; color: var(--ardoise); padding: 6px 0; }
.site-header nav a:hover, .site-header nav a[aria-current="page"] { color: var(--encre); box-shadow: inset 0 -2px 0 var(--soleil); }

/* ---------- Typographie ---------- */
h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; margin: 0; }
h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); font-weight: 750; max-width: 22ch; }
h2 { font-size: 1.55rem; font-weight: 700; margin-top: 2.4em; margin-bottom: 0.6em; }
h3 { font-size: 1.15rem; font-weight: 700; margin-top: 1.8em; margin-bottom: 0.4em; }
p, ul, ol { margin: 0 0 1em; }
.lede { font-size: 1.2rem; color: var(--ardoise); max-width: 52ch; margin-top: 0.8em; }
.meta { color: var(--ardoise); font-size: 0.9rem; margin-top: 1em; }
.hint { color: var(--ardoise); font-size: 0.85rem; margin: 4px 0 0; }

/* ---------- Pages ---------- */
.page { padding-top: 40px; padding-bottom: 64px; }
.page-header { margin-bottom: 32px; }
.crumbs { font-size: 0.85rem; color: var(--ardoise); margin-bottom: 14px; }
.crumbs a { color: var(--ardoise); }
.disclosure { font-size: 0.85rem; color: var(--ardoise); border-left: 3px solid var(--filet); padding-left: 12px; max-width: var(--measure); }
.prose { max-width: var(--measure); }
.prose > h2:first-child { margin-top: 0; }
.type-outil .prose { max-width: none; }
.type-outil .prose > :not(.simulator) { max-width: var(--measure); }

.toc { max-width: var(--measure); margin: 0 0 36px; padding: 16px 20px; background: var(--papier); border: 1px solid var(--filet); border-radius: var(--radius); }
.toc p { margin: 0 0 6px; font-weight: 700; font-size: 0.95rem; }
.toc ol { margin: 0; padding-left: 1.3em; font-size: 0.95rem; }

.note { border-left: 4px solid var(--soleil); background: var(--soleil-doux); padding: 14px 18px; margin: 1.6em 0; border-radius: 0 var(--radius) var(--radius) 0; }
.note p:last-child { margin: 0; }

.table-wrap { overflow-x: auto; margin: 1.4em 0; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; background: var(--papier); }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--filet); vertical-align: top; }
thead th { font-size: 0.85rem; color: var(--ardoise); font-weight: 600; border-bottom: 2px solid var(--encre); }
tbody th { font-weight: 600; }
td.num { text-align: right; white-space: nowrap; }

.cta { margin: 2em 0; padding: 20px 22px; background: var(--papier); border: 1px solid var(--filet); border-left: 4px solid var(--soleil); border-radius: var(--radius); }
.cta p:last-child { margin: 0; }

.sources, .related { max-width: var(--measure); margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--filet); font-size: 0.9rem; color: var(--ardoise); }
.sources h2, .related h2 { font-size: 1rem; margin: 0 0 8px; color: var(--encre); }
.sources ul, .related ul { padding-left: 1.1em; }

/* ---------- Boutons et champs ---------- */
.button {
  display: inline-block; border: 0; border-radius: var(--radius); cursor: pointer;
  background: var(--encre); color: var(--beton); font: 600 1rem/1 var(--font);
  padding: 14px 20px; text-decoration: none;
}
.button:hover { background: #2c4250; }
@media (prefers-color-scheme: dark) { .button:hover { background: #ffffff; } }
.link-button { background: none; border: 0; padding: 0; font: inherit; color: inherit; text-decoration: underline; text-underline-offset: 3px; cursor: pointer; }

fieldset { border: 0; padding: 0; margin: 0 0 22px; }
legend { font-weight: 700; font-size: 1.05rem; margin-bottom: 10px; padding: 0; }
.field { margin-bottom: 14px; position: relative; }
.field label { display: block; font-size: 0.92rem; font-weight: 600; margin-bottom: 4px; }
input[type="text"], input[type="number"], select {
  width: 100%; font: inherit; color: var(--encre); background: var(--papier);
  border: 1px solid #9aa6a1; border-radius: var(--radius); padding: 10px 12px; min-height: 46px;
}
.field-check { display: flex; align-items: center; gap: 10px; }
.field-check label { margin: 0; font-weight: 500; }
.field-check input { width: 20px; height: 20px; accent-color: var(--encre); }
.suggestions {
  position: absolute; z-index: 5; left: 0; right: 0; top: 100%; margin: 2px 0 0; padding: 4px 0; list-style: none;
  background: var(--papier); border: 1px solid var(--filet); border-radius: var(--radius); box-shadow: 0 8px 20px rgba(20, 30, 35, 0.12);
}
.suggestions li { padding: 8px 12px; cursor: pointer; }
.suggestions li[aria-selected="true"], .suggestions li:hover { background: var(--soleil-doux); }
.form-error { color: var(--danger); font-weight: 600; margin-top: 12px; }

/* ---------- Accueil ---------- */
.hero { border-bottom: 1px solid var(--filet); background: var(--papier); }
.hero .wrap { display: grid; gap: 40px; padding-top: 56px; padding-bottom: 56px; grid-template-columns: 1fr; }
@media (min-width: 900px) { .hero .wrap { grid-template-columns: 1.1fr 0.9fr; align-items: end; } }
.hero h1 { max-width: 16ch; }
.hero .lede { margin-bottom: 0; }
.quick-sim { background: var(--beton); border: 1px solid var(--filet); border-radius: var(--radius); padding: 22px; }
.quick-sim .button { width: 100%; margin-top: 4px; }
.home-section { padding-top: 56px; padding-bottom: 8px; }
.home-section h2 { margin-top: 0; }
.home-section > p { max-width: var(--measure); }
.guide-list { list-style: none; padding: 0; display: grid; gap: 0; grid-template-columns: 1fr; border-top: 1px solid var(--filet); }
@media (min-width: 760px) { .guide-list { grid-template-columns: 1fr 1fr; column-gap: 40px; } }
.guide-list a { display: block; padding: 16px 0; border-bottom: 1px solid var(--filet); text-decoration: none; }
.guide-list a:hover .guide-title { text-decoration: underline; }
.guide-title { display: block; font-weight: 700; }
.guide-desc { display: block; color: var(--ardoise); font-size: 0.92rem; }
.facts { display: grid; gap: 24px; grid-template-columns: 1fr; padding: 0; list-style: none; max-width: 980px; }
@media (min-width: 760px) { .facts { grid-template-columns: repeat(3, 1fr); } }
.facts li { border-top: 3px solid var(--encre); padding-top: 12px; }
.facts strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }

/* ---------- Simulateur ---------- */
.simulator { display: grid; gap: 32px; grid-template-columns: 1fr; margin-top: 8px; }
@media (min-width: 980px) { .simulator { grid-template-columns: 380px 1fr; align-items: start; } .sim-results { position: sticky; top: 16px; } }
.sim-form { background: var(--papier); border: 1px solid var(--filet); border-radius: var(--radius); padding: 22px; }
.sim-form .button { width: 100%; }
.sim-form.is-loading .button { opacity: 0.6; pointer-events: none; }
.sim-form.is-loading .button::after { content: " — calcul en cours…"; }
.battery-fields { padding-left: 30px; }

.sim-results { background: var(--papier); border: 1px solid var(--filet); border-top: 5px solid var(--soleil); border-radius: var(--radius); padding: 24px 26px; min-height: 240px; outline: none; }
.sim-results[aria-busy="true"] { opacity: 0.55; }
.results-empty p { color: var(--ardoise); max-width: 46ch; margin: 0; }
.result-head { font-size: 1.25rem; line-height: 1.4; max-width: 46ch; }
.result-head strong { background: linear-gradient(transparent 62%, var(--soleil-doux) 62%); }
.figures { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 0; margin: 20px 0 8px; border-top: 1px solid var(--filet); }
.fig { padding: 14px 16px 14px 0; border-bottom: 1px solid var(--filet); }
.fig dt { font-size: 0.85rem; color: var(--ardoise); }
.fig dd { margin: 2px 0 0; font-size: 1.7rem; font-weight: 700; letter-spacing: -0.02em; }
.fig dd span { font-size: 0.95rem; font-weight: 600; color: var(--ardoise); }
.fig-prod dd { color: var(--soleil); }
.fig-money dd { color: var(--sauge); }
.chart { margin: 20px 0 8px; }
.chart svg { width: 100%; height: auto; display: block; }
.chart .bar { fill: var(--soleil); }
.chart .bar-val { font: 600 11px var(--font); fill: var(--encre); text-anchor: middle; }
.chart .bar-lbl { font: 11px var(--font); fill: var(--ardoise); text-anchor: middle; }
.chart figcaption { font-size: 0.82rem; color: var(--ardoise); }
.advice, .battery-result, .next { margin-top: 24px; }
.advice ul { padding-left: 1.1em; }
.battery-result { background: var(--sauge-doux); padding: 14px 18px; border-radius: var(--radius); }
.battery-result h3, .advice h3, .next h3 { margin-top: 0; }
.compare { border-left: 4px solid var(--soleil); padding-left: 12px; }
.assumptions { margin-top: 18px; font-size: 0.9rem; color: var(--ardoise); }
.assumptions summary { cursor: pointer; font-weight: 600; color: var(--encre); }
.brand-list { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; padding: 0; }
.brand-list a { display: inline-block; padding: 8px 14px; border: 1px solid var(--filet); border-radius: 99px; text-decoration: none; font-weight: 600; font-size: 0.92rem; }
.brand-list a:hover { border-color: var(--encre); }

/* ---------- Pied de page ---------- */
.site-footer { margin-top: 48px; border-top: 1px solid var(--filet); background: var(--papier); font-size: 0.88rem; color: var(--ardoise); }
.site-footer .wrap { padding-top: 28px; padding-bottom: 36px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 12px; }

@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }
@media print { .site-header nav, .site-footer nav, .sim-form, .cta { display: none; } }

@media (max-width: 560px) {
  .chart .bar-val { display: none; }
  .chart .bar-lbl { font-size: 17px; }
}