/* ============================================================
   Triskell Outils — Layout (header, footer, page calculateur)
   ============================================================ */

/* ── HEADER ── */
.t-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.t-header__inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 64px;
  padding: 0 16px;
  max-width: 1080px;
  margin: 0 auto;
}
.t-back {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  color: var(--muted-2);
  transition: var(--t);
  flex-shrink: 0;
}
.t-back:hover { background: var(--bg-3); color: var(--text); }
.t-back svg { width: 22px; height: 22px; }
.t-header__title {
  font-family: var(--font-h);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .01em;
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.t-header__title small {
  display: block;
  font-family: var(--font-b);
  font-weight: 500;
  font-size: .75rem;
  color: var(--muted);
  letter-spacing: 0;
  text-transform: uppercase;
}
.t-theme-toggle {
  height: 38px;
  padding: 0 14px 0 11px;
  display: inline-flex; align-items: center; gap: 8px;
  border-radius: 999px;
  background: transparent;
  color: var(--muted-2);
  transition: var(--t);
  font-size: .8125rem;
  font-weight: 500;
  border: 1px solid var(--border);
}
.t-theme-toggle:hover { background: var(--bg-3); color: var(--text); border-color: var(--border-2); }
.t-theme-toggle svg { width: 18px; height: 18px; flex-shrink: 0; }
.t-theme-toggle__label { white-space: nowrap; }

/* Par défaut : light → on affiche soleil + "Mode clair" */
.t-theme-toggle .icon-moon,
.t-theme-toggle .label-dark { display: none; }
[data-theme="dark"] .t-theme-toggle .icon-sun,
[data-theme="dark"] .t-theme-toggle .label-light { display: none; }
[data-theme="dark"] .t-theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .t-theme-toggle .label-dark { display: inline; }

@media (max-width: 560px) {
  .t-theme-toggle { padding: 0; width: 40px; justify-content: center; border-radius: var(--r-sm); border-color: transparent; }
  .t-theme-toggle:hover { border-color: var(--border-2); }
  .t-theme-toggle__label { display: none !important; }
}

/* ── BRAND BLOCK (HERO HOME) ── */
.t-brand {
  position: relative;
  isolation: isolate;
  text-align: center;
  padding: 64px 16px 40px;
  overflow: hidden;
}
/* Trame "plan d'architecte" subtile en arrière-plan */
.t-brand::before {
  content: "";
  position: absolute;
  inset: -20px;
  z-index: -1;
  background-image:
    linear-gradient(rgba(99,102,241,.10) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,.10) 1px, transparent 1px);
  background-size: 32px 32px;
  background-position: center;
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at center, black 25%, transparent 78%);
  mask-image: radial-gradient(ellipse 75% 65% at center, black 25%, transparent 78%);
}
[data-theme="dark"] .t-brand::before {
  background-image:
    linear-gradient(rgba(139,92,246,.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139,92,246,.13) 1px, transparent 1px);
}
/* Repères d'angle "blueprint" aux 4 coins */
.t-brand .corner {
  position: absolute;
  width: 22px;
  height: 22px;
  border-color: rgba(99,102,241,.45);
}
.t-brand .corner--tl { top: 18px; left: 18px;    border-top: 2px solid; border-left: 2px solid; }
.t-brand .corner--tr { top: 18px; right: 18px;   border-top: 2px solid; border-right: 2px solid; }
.t-brand .corner--bl { bottom: 18px; left: 18px; border-bottom: 2px solid; border-left: 2px solid; }
.t-brand .corner--br { bottom: 18px; right: 18px;border-bottom: 2px solid; border-right: 2px solid; }
[data-theme="dark"] .t-brand .corner { border-color: rgba(139,92,246,.55); }

/* Outils flottants dans le hero — visibles mais en arrière-plan */
.t-deco-tool {
  position: absolute;
  pointer-events: none;
  color: var(--indigo-dk);
  opacity: .22;
  z-index: 0;
}
[data-theme="dark"] .t-deco-tool { opacity: .32; color: var(--violet); }
.t-deco-tool--hat     { width: 88px;  top: 30px;     left: 5%;    transform: rotate(-12deg); }
.t-deco-tool--meter   { width: 180px; top: 60px;     right: 4%;   transform: rotate(8deg); }
.t-deco-tool--ladder  { width: 80px;  bottom: 40px;  left: 6%;    transform: rotate(-6deg); color: var(--orange); opacity: .35; }
[data-theme="dark"] .t-deco-tool--ladder { opacity: .42; }
.t-deco-tool--toolbox { width: 130px; bottom: 50px;  right: 5%;   transform: rotate(4deg); }

/* Sur mobile : on pousse l'échelle et la caisse à outils SOUS le texte
   en augmentant le padding bas du hero, et on rapproche les déco du bord. */
@media (max-width: 760px) {
  .t-brand              { padding-bottom: 110px; }
  .t-deco-tool--hat     { width: 60px; top: 22px; left: 10px; }
  .t-deco-tool--meter   { display: none; }
  .t-deco-tool--ladder  { width: 44px; bottom: 14px; left: 38px; }
  .t-deco-tool--toolbox { width: 70px; bottom: 18px; right: 38px; }
}
@media (max-width: 380px) {
  .t-deco-tool--ladder  { width: 36px; left: 24px; }
  .t-deco-tool--toolbox { width: 60px; right: 24px; }
}

/* Annotation type plan d'architecte */
.t-deco-annot {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  font-family: ui-monospace, "SFMono-Regular", Menlo, monospace;
  font-size: .65rem;
  letter-spacing: .25em;
  color: var(--muted);
  opacity: .55;
  white-space: nowrap;
  text-transform: uppercase;
  pointer-events: none;
}
@media (max-width: 540px) { .t-deco-annot { display: none; } }

/* Le contenu du hero reste au-dessus des décors */
.t-brand > .t-brand__logo,
.t-brand > h1,
.t-brand > .lead { position: relative; z-index: 1; }
.t-brand__logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-h);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: .02em;
  color: var(--muted-2);
  margin-bottom: 28px;
}
.t-brand__logo img {
  width: 36px;
  height: 36px;
  filter: drop-shadow(0 2px 8px rgba(99,102,241,.25));
  flex-shrink: 0;
}
.t-brand__logo small {
  font-family: var(--font-b);
  font-weight: 500;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--muted);
  display: block;
  line-height: 1.2;
}
.t-brand__logo .lockup {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  text-align: left;
}
.t-brand__logo .lockup b {
  font-family: var(--font-h);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: -.01em;
  text-transform: lowercase;
  line-height: 1;
}
.t-brand h1 { margin-bottom: 12px; }
.t-brand .lead { max-width: 540px; margin: 0 auto; }

/* ── PAGE / SECTION ── */
.t-page { padding-bottom: 80px; }
.t-section { padding: 32px 0; }
.t-section + .t-section { border-top: 1px solid var(--border); }
.t-section--bordered { border-top: 1px solid var(--border); }
.t-section__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  padding: 0 4px;
}
.t-section__head h2 { font-size: 1rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--muted-2); font-family: var(--font-b); }

/* ── FOOTER ── */
.t-footer {
  margin-top: 64px;
  padding: 32px 16px 40px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--muted);
  font-size: .8125rem;
}
.t-footer strong { color: var(--text-2); font-family: var(--font-h); }
.t-footer a { color: var(--muted-2); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--border-2); transition: var(--t); }
.t-footer a:hover { color: var(--text); text-decoration-color: var(--text); }
.t-footer .legal { margin-top: 12px; font-size: .75rem; max-width: 540px; margin-left: auto; margin-right: auto; }