/* =========================================================
   CalculTravaux.fr -- feuille de style unique du site statique
   Design maison, aucune dependance externe (pas de CDN, pas de
   police externe : pile systeme uniquement).
   ========================================================= */

/* ---------- Tokens ---------- */
:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-surface-alt: #f3f1ed;
  --color-text: #1c1e21;
  --color-text-muted: #5b6169;
  --color-border: #e5e1da;
  --color-primary: #e8630a;
  --color-primary-dark: #c94f00;
  --color-primary-contrast: #ffffff;
  --color-secondary: #1f3a5f;
  --color-success: #1e8e3e;
  --color-success-bg: #eaf6ec;
  --color-error: #d32f2f;
  --color-error-bg: #fdecea;

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.06), 0 1px 1px rgba(20, 20, 20, 0.04);
  --shadow-md: 0 6px 20px rgba(20, 20, 20, 0.08);

  --container-w: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #15171a;
    --color-surface: #1e2125;
    --color-surface-alt: #262a2f;
    --color-text: #f2f1ee;
    --color-text-muted: #a8adb4;
    --color-border: #33373d;
    --color-primary: #ff8a3d;
    --color-primary-dark: #ffa564;
    --color-primary-contrast: #1c1000;
    --color-secondary: #7fa8e0;
    --color-success: #4fbf6b;
    --color-success-bg: #123a1e;
    --color-error: #ef5350;
    --color-error-bg: #3a1414;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.5);
  }
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--color-primary-dark); text-decoration-thickness: 1.5px; }
a:hover { color: var(--color-primary); }
h1, h2, h3, h4 { line-height: 1.25; font-weight: 700; margin: 1.6em 0 0.6em; }
h1 { font-size: clamp(1.7rem, 1.3rem + 1.6vw, 2.5rem); margin-top: 0; }
h2 { font-size: clamp(1.3rem, 1.1rem + 0.8vw, 1.7rem); }
h3 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; }
table { border-collapse: collapse; width: 100%; margin: 1em 0; }
th, td { border: 1px solid var(--color-border); padding: 0.5em 0.75em; text-align: left; }
th { background: var(--color-surface-alt); }
button { font: inherit; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0; padding: 0; margin: -1px;
}

.skip-link {
  position: absolute; left: 0.5rem; top: -3rem;
  background: var(--color-primary); color: var(--color-primary-contrast);
  padding: 0.6em 1em; border-radius: var(--radius-sm); z-index: 200;
  transition: top 0.15s ease;
}
.skip-link:focus { top: 0.5rem; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 1.25rem;
}
.icon {
  width: 1.25em; height: 1.25em; stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round;
  vertical-align: -0.2em; flex-shrink: 0;
}
.icon-sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

/* ---------- Header ---------- */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky; top: 0; z-index: 100;
}
.site-header__bar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem; padding: 0.85rem 0;
}
.site-logo {
  display: flex; align-items: center;
  text-decoration: none; white-space: nowrap;
}
.site-logo__img { height: 42px; width: auto; display: block; }

.main-nav { display: flex; }
.main-nav__list {
  list-style: none; display: flex; gap: 0.25rem; margin: 0; padding: 0;
}
.main-nav__item { position: relative; }
.main-nav__link {
  display: flex; align-items: center; gap: 0.3em; white-space: nowrap;
  padding: 0.6em 0.85em; border-radius: var(--radius-sm);
  color: var(--color-text); text-decoration: none; font-weight: 600; font-size: 0.95rem;
}
.main-nav__link:hover, .main-nav__item:hover > .main-nav__link { background: var(--color-surface-alt); color: var(--color-text); }
.main-nav__link .icon { width: 1em; height: 1em; opacity: 0.7; }

.main-nav__dropdown {
  list-style: none; margin: 0; padding: 0.5rem;
  position: absolute; top: 100%; left: 0; min-width: 260px;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden; transform: translateY(4px);
  transition: opacity 0.12s ease, transform 0.12s ease, visibility 0.12s;
}
.main-nav__item:hover > .main-nav__dropdown,
.main-nav__item:focus-within > .main-nav__dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.main-nav__dropdown a {
  display: block; padding: 0.55em 0.7em; border-radius: var(--radius-sm);
  color: var(--color-text); text-decoration: none; font-size: 0.92rem;
}
.main-nav__dropdown a:hover { background: var(--color-surface-alt); color: var(--color-primary-dark); }

.nav-toggle {
  display: none; background: none; border: 1px solid var(--color-border);
  border-radius: var(--radius-sm); padding: 0.5em; cursor: pointer; color: var(--color-text);
}

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .main-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  .main-nav.is-open { display: block; }
  .main-nav__list { flex-direction: column; padding: 0.5rem; gap: 0; }
  .main-nav__dropdown {
    position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none;
    border: none; display: block; padding-left: 0.75rem; margin-bottom: 0.4rem;
  }
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
  font-size: 0.85rem; color: var(--color-text-muted);
  padding: 0.9rem 0 0;
}
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.4em; margin: 0; padding: 0; }
.breadcrumb li { display: flex; align-items: center; gap: 0.4em; }
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-primary-dark); text-decoration: underline; }
.breadcrumb .icon { width: 0.8em; height: 0.8em; opacity: 0.6; }
.breadcrumb [aria-current] { color: var(--color-text); font-weight: 600; }

/* ---------- Hero ---------- */
.hero {
  padding: 3rem 0 2.5rem;
  background: linear-gradient(180deg, var(--color-surface-alt), var(--color-bg));
  border-bottom: 1px solid var(--color-border);
}
.hero__title { max-width: 20ch; }
.hero__actions { display: flex; gap: 0.8rem; flex-wrap: wrap; margin-top: 1.4rem; }

.page-header { padding: 2.2rem 0 0.5rem; }
.page-header__title { max-width: 34ch; }
.page-header__lede { font-size: 1.1rem; color: var(--color-text-muted); max-width: 65ch; }

.page-hero-image {
  width: 100%; max-height: 420px; object-fit: cover;
  border-radius: var(--radius-lg); margin: 1.2rem 0 1.6rem;
  box-shadow: var(--shadow-sm); border: 1px solid var(--color-border);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.75em 1.3em; border-radius: 999px; font-weight: 700;
  text-decoration: none; border: 2px solid transparent; cursor: pointer;
  font-size: 0.95rem; line-height: 1.2;
}
.btn-primary { background: var(--color-primary); color: var(--color-primary-contrast); }
.btn-primary:hover { background: var(--color-primary-dark); color: var(--color-primary-contrast); }
.btn-outline { border-color: var(--color-border); color: var(--color-text); background: var(--color-surface); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary-dark); }

/* ---------- Cards / grid ---------- */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.1rem; margin: 1.6rem 0;
}
.card {
  display: flex; flex-direction: column; gap: 0.6rem;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.3rem;
  text-decoration: none; color: var(--color-text);
  box-shadow: var(--shadow-sm); transition: transform 0.12s ease, box-shadow 0.12s ease, border-color 0.12s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); border-color: var(--color-primary); color: var(--color-text); }
.card__icon {
  width: 2.6rem; height: 2.6rem; border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-surface-alt); color: var(--color-primary); flex-shrink: 0;
}
.card__icon .icon { width: 1.5rem; height: 1.5rem; }
.card__title { font-weight: 700; font-size: 1.05rem; margin: 0; }
.card__desc { font-size: 0.9rem; color: var(--color-text-muted); margin: 0; }
.card__cta { margin-top: auto; font-weight: 700; font-size: 0.88rem; color: var(--color-primary-dark); display: flex; align-items: center; gap: 0.3em; }

.hub-list { list-style: none; margin: 1rem 0; padding: 0; display: flex; flex-wrap: wrap; gap: 0.6rem; }
.hub-list a {
  display: inline-flex; align-items: center; gap: 0.4em;
  padding: 0.5em 0.9em; border-radius: 999px; border: 1px solid var(--color-border);
  color: var(--color-text); text-decoration: none; font-size: 0.9rem; font-weight: 600;
  background: var(--color-surface);
}
.hub-list a:hover { border-color: var(--color-primary); color: var(--color-primary-dark); }

/* ---------- Sections ---------- */
.section { padding: 2.4rem 0; }
.section-alt { background: var(--color-surface-alt); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section__head { max-width: 70ch; margin-bottom: 0.5rem; }
.section__foot { margin-top: 1.6rem; }

/* ---------- Calculator widget ---------- */
.calc-widget {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); padding: 1.6rem;
  box-shadow: var(--shadow-sm); margin: 1.6rem 0;
}
.calc-widget h2:first-child { margin-top: 0; }
.calc-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem 1.2rem; margin: 1rem 0; }
.calc-label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 0.35em; }
.calc-input {
  width: 100%; padding: 0.7em 0.85em; border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border); background: var(--color-surface);
  color: var(--color-text); font-size: 1rem; font-family: inherit;
}
.calc-input:focus { outline: 2px solid var(--color-primary); outline-offset: 1px; border-color: var(--color-primary); }
.calc-button {
  margin-top: 0.4rem; background: var(--color-primary); color: var(--color-primary-contrast);
  border: none; border-radius: 999px; padding: 0.8em 1.6em; font-weight: 700;
  font-size: 1rem; cursor: pointer;
}
.calc-button:hover { background: var(--color-primary-dark); }
.calc-result {
  margin-top: 1.2rem; padding: 1.1rem 1.3rem; border-radius: var(--radius-md);
  background: var(--color-success-bg); border: 1px solid var(--color-success);
  font-size: 0.98rem; line-height: 1.7;
}
.calc-result:empty { display: none; }

/* result blocks colored via inline style.color set by the original scripts
   (#2E7D32 success / #D32F2F error) keep working; this just gives the
   container itself a neutral, always-legible base look. */

.calc-article :is(h2, h3) { margin-top: 1.7em; }
.calc-article table { font-size: 0.92rem; }

/* ---------- FAQ ---------- */
.faq-list { margin: 1.4rem 0; display: flex; flex-direction: column; gap: 0.6rem; }
.faq-item {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); overflow: hidden;
}
.faq-item summary {
  cursor: pointer; padding: 0.95em 1.2em; font-weight: 700; list-style: none;
  display: flex; align-items: center; justify-content: space-between; gap: 1em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .icon { color: var(--color-primary); transition: transform 0.15s ease; flex-shrink: 0; }
.faq-item[open] summary .icon { transform: rotate(180deg); }
.faq-item__body { padding: 0 1.2em 1.1em; color: var(--color-text-muted); }
.faq-item__body :last-child { margin-bottom: 0; }

/* ---------- Article ---------- */
.article-body { max-width: 100%; }
.article-body :is(h2, h3) { scroll-margin-top: 5rem; }
.article-meta { color: var(--color-text-muted); font-size: 0.88rem; }
.article-meta a { color: inherit; text-decoration-color: var(--color-border); }

.author-box {
  display: flex; gap: 0.9rem; align-items: flex-start;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.1rem 1.3rem; margin: 2rem 0 1rem;
}
.author-box .icon { width: 1.8rem; height: 1.8rem; color: var(--color-primary); flex-shrink: 0; margin-top: 0.1em; }
.author-box__name { font-weight: 700; margin: 0 0 0.2em; }
.author-box__bio { font-size: 0.9rem; color: var(--color-text-muted); margin: 0; }

/* ---------- Related links ---------- */
.related-box {
  background: var(--color-surface-alt); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 1.3rem 1.4rem; margin: 1.8rem 0;
}
.related-box h2, .related-box h3 { margin-top: 0; }
.related-box ul { margin: 0.5em 0 0; padding-left: 1.2em; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-secondary); color: #e8ecf2; margin-top: 3rem; }
.site-footer a { color: #cfe0f7; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 2rem; padding: 2.6rem 0 1.6rem;
}
.footer-grid h3 { color: #fff; font-size: 0.95rem; text-transform: uppercase; letter-spacing: 0.04em; margin: 0 0 0.9em; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.5em; font-size: 0.9rem; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.15);
  padding: 1.1rem 0; font-size: 0.82rem; color: #b7c4d6;
  display: flex; flex-wrap: wrap; gap: 0.8rem 1.4rem; justify-content: space-between;
}
.footer-bottom ul { list-style: none; display: flex; flex-wrap: wrap; gap: 1rem; margin: 0; padding: 0; }

/* ---------- Cookie / RGPD banner ---------- */
.consent-banner {
  position: fixed; left: 1rem; right: 1rem; bottom: 1rem; z-index: 300;
  max-width: 640px; margin: 0 auto;
  background: var(--color-surface); color: var(--color-text);
  border: 1px solid var(--color-border); border-radius: var(--radius-md);
  box-shadow: var(--shadow-md); padding: 1.2rem 1.3rem;
  display: none;
}
.consent-banner.is-visible { display: block; }
.consent-banner p { font-size: 0.88rem; color: var(--color-text-muted); margin-bottom: 0.9rem; }
.consent-banner__actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.consent-banner .btn { padding: 0.6em 1.1em; font-size: 0.86rem; }

/* ---------- Utility ---------- */
.eyebrow {
  display: inline-block; font-size: 0.78rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--color-primary-dark); margin-bottom: 0.5em;
}
.placeholder-fill { background: #fff3cd; color: #7a5b00; padding: 0.05em 0.3em; border-radius: 4px; font-weight: 700; }