/* =====================================================
   TOOL SHELL · Header/Footer común v2
   Laboratorio de Sistemas Porcícolas
   ===================================================== */

:root {
  --shell-brand: var(--brand, var(--accent, #0f3d36));
  --shell-brand-mid: #174d43;
  --shell-brand-dark: #0d2e29;
  --shell-brand-soft: var(--brand-soft, var(--accent-soft, #dcece6));
  --shell-text: #ffffff;
  --shell-text-soft: #dcece6;
  --shell-text-muted: #b8d7cb;
  --shell-line: rgba(255,255,255,0.14);
  --shell-radius: var(--radius, 18px);
  --shell-shadow: 0 14px 32px rgba(8, 31, 27, 0.22);
  --shell-container: 1440px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
.container { width: min(var(--shell-container), calc(100% - clamp(34px, 6vw, 104px))); margin-inline: auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  color: var(--shell-text);
  background: radial-gradient(circle at 10% 0%, rgba(255,255,255,0.11), transparent 30%), linear-gradient(135deg, var(--shell-brand), var(--shell-brand-mid) 52%, var(--shell-brand-dark));
  border-bottom: 1px solid var(--shell-line);
  box-shadow: var(--shell-shadow);
  backdrop-filter: blur(12px);
  padding: 14px 0 13px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.4;
  transition: padding 190ms ease, box-shadow 190ms ease, background 190ms ease, border-color 190ms ease;
}
.header-grid { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: clamp(16px, 2.2vw, 28px); align-items: center; }
.site-header .brand-block { min-width: 0; }
.eyebrow { margin: 0 0 6px; color: #7a9b8f; text-transform: uppercase; letter-spacing: .08em; font-size: 12px; font-weight: 850; }
.site-header .eyebrow { color: var(--shell-text-muted); transition: font-size 190ms ease, margin 190ms ease, opacity 190ms ease; }
.site-header .brand-block h1 { margin: 0 0 4px; color: var(--shell-text); font-size: clamp(32px, 3.7vw, 52px); line-height: .95; letter-spacing: -.06em; text-wrap: balance; transition: font-size 190ms ease, letter-spacing 190ms ease, line-height 190ms ease, margin 190ms ease; }
.site-header .subtitle { margin: 0; color: var(--shell-text-soft); font-size: 15.5px; line-height: 1.25; transition: font-size 190ms ease, opacity 190ms ease, transform 190ms ease; }
.site-header .author-line { margin: 6px 0 0; color: var(--shell-text-soft); font-size: 13.75px; font-weight: 650; line-height: 1.25; transition: font-size 190ms ease, margin 190ms ease, opacity 190ms ease, transform 190ms ease; }
.site-header .author-line a, .site-footer a { color: inherit; text-decoration: none; border-bottom: 1px solid rgba(255,255,255,.45); }
.site-header .author-line a:hover, .site-footer a:hover { border-bottom-color: currentColor; }
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 14px; flex-wrap: wrap; }
.profile-button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 10px 15px; border: 1px solid rgba(255,255,255,.26); border-radius: 999px; background: rgba(255,255,255,.08); color: #fff; text-decoration: none; font-size: 14.5px; font-weight: 850; white-space: nowrap; transition: min-height 190ms ease, padding 190ms ease, font-size 190ms ease, background 160ms ease, border-color 160ms ease, transform 160ms ease; }
.profile-button:hover { background: rgba(255,255,255,.15); border-color: rgba(255,255,255,.38); color: #fff; transform: translateY(-1px); }
.version-card { padding: 13px 18px; border: 1px solid rgba(255,255,255,.22); border-radius: var(--shell-radius); background: rgba(255,255,255,.08); min-width: 142px; transition: padding 190ms ease, min-width 190ms ease, border-radius 190ms ease; }
.version-card span { display: block; color: var(--shell-text-muted); font-size: 12.75px; margin-bottom: 4px; }
.version-card strong { display: block; color: #fff; font-size: 17.5px; line-height: 1.1; }
.site-header.is-compact { padding: 6px 0; box-shadow: 0 10px 24px rgba(8,31,27,.24); border-bottom-color: rgba(255,255,255,.10); }
.site-header.is-compact .brand-block h1 { font-size: clamp(23px, 2.1vw, 32px); line-height: .94; letter-spacing: -.05em; margin-bottom: 2px; }
.site-header.is-compact .eyebrow { margin-bottom: 2px; font-size: 10px; }
.site-header.is-compact .subtitle { font-size: 12px; opacity: .88; transform: translateY(-1px); }
.site-header.is-compact .author-line { margin-top: 1px; font-size: 11px; opacity: .86; transform: translateY(-1px); }
.site-header.is-compact .profile-button { min-height: 32px; padding: 7px 11px; font-size: 12px; }
.site-header.is-compact .version-card { padding: 7px 11px; min-width: 104px; border-radius: 14px; }
.site-header.is-compact .version-card span { font-size: 10px; margin-bottom: 0; }
.site-header.is-compact .version-card strong { font-size: 13px; }

.site-footer { margin-top: 18px; padding: 24px 0 28px; color: var(--shell-text-soft); background: linear-gradient(135deg, var(--shell-brand-dark), #143f38 55%, var(--shell-brand)); border-top: 1px solid rgba(255,255,255,.08); font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; font-size: 14px; line-height: 1.42; }
.footer-grid { display: grid; grid-template-columns: minmax(260px, 1.2fr) minmax(260px, 1fr) minmax(260px, 1fr); gap: 14px; align-items: stretch; }
.footer-brand, .footer-card { border: 1px solid rgba(255,255,255,.12); border-radius: 16px; background: rgba(255,255,255,.06); padding: 14px 15px; }
.footer-brand .eyebrow { margin: 0 0 6px; color: var(--shell-text-muted); text-transform: uppercase; letter-spacing: .08em; font-size: 11px; font-weight: 850; }
.footer-brand h2 { margin: 0 0 6px; color: #fff; font-size: 22px; line-height: 1.1; }
.footer-brand p, .footer-card p { margin: 6px 0 0; line-height: 1.42; }
.footer-card strong { display: block; color: #fff; margin-bottom: 5px; }
.footer-card em { color: #fff; }
.site-footer a { color: #fff; font-weight: 900; }

@media (max-width: 1200px) { .container { width: min(100%, calc(100% - 46px)); } }
@media (max-width: 980px) {
  .header-grid, .footer-grid { grid-template-columns: 1fr; }
  .header-actions { justify-content: flex-start; }
  .site-header { padding: 10px 0; }
  .site-header .brand-block h1 { font-size: clamp(27px, 7vw, 39px); }
  .site-header.is-compact .brand-block h1 { font-size: clamp(22px, 6vw, 30px); }
  .site-header .subtitle, .site-header .author-line { font-size: 12.5px; }
  .container { width: min(100%, calc(100% - 28px)); }
}
@media (max-width: 680px) {
  .container { width: min(100%, calc(100% - 22px)); }
  .site-header .brand-block h1 { font-size: 28px; }
  .profile-button { min-height: 40px; padding: 8px 11px; font-size: 13px; }
  .version-card { min-width: 112px; padding: 9px 12px; }
  .version-card span { font-size: 10.5px; }
  .version-card strong { font-size: 14px; }
  .site-footer { padding: 22px 0 26px; }
}
@media (prefers-reduced-motion: reduce) { .site-header, .site-header *, .profile-button, .version-card, .version-card * { transition: none !important; } }