/* ============================================================
   base.css - reset, typography, shared chrome (header/nav/footer),
   buttons, and utilities. Loaded on EVERY page after tokens.css +
   motion.css. "Satpur Press" light theme: warm paper, ink text,
   one scarce vermilion accent, hairline rules.
   ============================================================ */

/* ---------------- Reset ---------------- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-sans);
  font-size: var(--fs-300);
  line-height: var(--lh-body);
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, video { display: block; max-width: 100%; height: auto; }
/* <picture> is a transparent wrapper (WebP source + fallback <img>): it
   generates no box, so every existing rule that targets the <img> still
   applies and layout is unchanged. */
picture { display: contents; }
a { color: var(--link); text-decoration: none; }
a:hover { color: var(--accent-strong); }
strong { font-weight: 700; color: inherit; }
ul { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--lh-tight);
  color: var(--heading);
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ---------------- Layout ---------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* Section heading system (restyles old .section-title / .section-heading /
   .special-heading so existing markup keeps working). */
.section-title,
.section-heading,
.special-heading {
  font-size: var(--fs-600);
  text-align: center;
  color: var(--heading);
  letter-spacing: -0.015em;
  margin-bottom: var(--space-lg);
  position: relative;
}
.section-title::after,
.special-heading::after {
  content: "";
  display: block;
  width: 56px;
  height: 3px;
  margin: var(--space-sm) auto 0;
  border-radius: var(--radius-pill);
  background: var(--accent);
}
.section-heading span { display: block; color: var(--accent); }

.eyebrow {
  display: inline-block;
  font-size: var(--fs-100);
  font-weight: 700;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-xs);
}

/* Spec caption - the signature "dossier" label under product photos.
   Tabular, uppercase, with a small vermilion tick. Used site-wide. */
.spec-caption {
  display: flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-sans);
  font-size: var(--fs-100);
  font-weight: 600;
  letter-spacing: var(--tracking-caps);
  text-transform: uppercase;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.spec-caption .tick {
  width: 12px;
  height: 2px;
  flex: none;
  border-radius: 2px;
  background: var(--accent);
}

/* ---------------- Buttons ----------------
   New system + legacy aliases (.btn-cta, .btn-inquire, .btn-sample,
   .read-more-btn) so we don't have to touch every page's markup. */
.btn,
.btn-cta,
.btn-inquire,
.btn-sample,
.read-more-btn,
.submit-btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--press);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.85em 1.6em;
  font: inherit;
  font-weight: 600;
  line-height: 1;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1.5px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  text-align: center;
  transition: transform var(--dur-fast) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              background var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}
.btn:hover,
.btn-cta:hover,
.btn-inquire:hover,
.submit-btn:hover {
  background: #2c3037;
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  color: var(--press);
}
.btn:active,
.btn-cta:active,
.btn-inquire:active { transform: translateY(0); }

/* Accent (vermilion) variant - primary CTA */
.btn--accent,
.btn-cta {
  --btn-bg: var(--accent);
  --btn-fg: var(--press);
}
.btn--accent:hover,
.btn-cta:hover { background: var(--vermilion-ink); color: var(--press); }

/* Ghost / secondary - hairline outline, ink text, vermilion on hover */
.btn--ghost,
.btn-sample,
.read-more-btn {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border-color: var(--border-strong);
}
.btn--ghost:hover,
.btn-sample:hover,
.read-more-btn:hover {
  background: transparent;
  color: var(--vermilion-ink);
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: none;
}

/* ---------------- Header / Nav (single canonical definition) ---------------- */
.header-fixed {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  width: 100%;
  background: rgba(251, 250, 247, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out),
              border-color var(--dur) var(--ease-out);
}
.header-fixed.scrolled {
  background: rgba(251, 250, 247, 0.94);
  box-shadow: 0 6px 22px rgba(22, 24, 28, 0.07);
  border-bottom-color: var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding: 0.6rem var(--gutter);
}

.logo { display: inline-flex; align-items: center; }
.logo img {
  max-height: 76px;
  width: auto;
  transition: transform var(--dur) var(--ease-out);
}
.logo img:hover { transform: scale(1.03); }

.menu { display: flex; align-items: center; gap: 0.5rem; }
.menu > li { position: relative; }
.menu a {
  display: block;
  position: relative;
  padding: 0.6rem 0.85rem;
  font-weight: 600;
  color: var(--text);
}
.menu a::after {
  content: "";
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease-out);
}
.menu a:hover,
.menu a:focus-visible { color: var(--accent-strong); }
.menu a:hover::after,
.menu a:focus-visible::after { transform: scaleX(1); }

/* Dropdown */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow);
  padding: 0.35rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out), visibility var(--dur);
}
.dropdown:hover .dropdown-menu,
.dropdown:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown-menu li a { padding: 0.6rem 0.8rem; border-radius: var(--radius-xs); font-weight: 500; }
.dropdown-menu li a::after { content: none; }
.dropdown-menu li a:hover { background: var(--vermilion-soft); color: var(--accent-strong); }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.6rem;
  z-index: calc(var(--z-header) + 1);
}
.hamburger,
.hamburger::before,
.hamburger::after {
  content: "";
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--ink);
  border-radius: 3px;
  transition: transform var(--dur) var(--ease-out), opacity var(--dur) var(--ease-out);
}
.hamburger::before { transform: translateY(-8px); }
.hamburger::after  { transform: translateY(5.5px); }
.nav-toggle.active .hamburger { background: transparent; }
.nav-toggle.active .hamburger::before { transform: rotate(45deg); }
.nav-toggle.active .hamburger::after  { transform: rotate(-45deg); }

/* ---------------- Footer ---------------- */
footer[role="contentinfo"] { background: var(--ink); color: rgba(251, 250, 247, 0.70); }
.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-lg);
  max-width: var(--container);
  margin-inline: auto;
  padding: var(--space-2xl) var(--gutter) var(--space-lg);
}
.footer-logo-img { max-width: 220px; height: auto; margin-bottom: var(--space-sm); }
.footer-content h2 { color: var(--press); font-size: var(--fs-500); margin-bottom: var(--space-xs); }
.footer-content h3 { color: var(--press); font-size: var(--fs-300); margin-bottom: var(--space-sm); text-transform: uppercase; letter-spacing: var(--tracking-wide); font-family: var(--font-sans); font-weight: 700; }
.footer-content p, .footer-content li { font-size: var(--fs-200); margin-bottom: 0.4rem; }
.footer-content a { color: rgba(251, 250, 247, 0.70); }
.footer-content a:hover { color: #ed7a5e; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.10);
  text-align: center;
  padding: var(--space-md) var(--gutter);
  font-size: var(--fs-100);
}
.footer-bottom a { color: rgba(251, 250, 247, 0.70); }
.footer-bottom a:hover { color: #ed7a5e; }
/* Simple single-line footer (legacy) */
footer[role="contentinfo"] > p {
  text-align: center;
  padding: var(--space-lg) var(--gutter);
  font-size: var(--fs-100);
  margin: 0;
}

/* WhatsApp float */
.whatsapp-float {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 56px;
  height: 56px;
  z-index: var(--z-sticky-cta);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  box-shadow: var(--shadow);
  background: #25d366;
  transition: transform var(--dur) var(--ease-out);
}
.whatsapp-float:hover { transform: scale(1.08); }
.whatsapp-float img { width: 60%; height: 60%; object-fit: contain; }

/* Breadcrumb (product pages) */
.breadcrumb {
  font-size: var(--fs-200);
  color: var(--text-muted);
  padding: var(--space-md) 0 0;
}
.breadcrumb a { color: var(--link); }

/* ---------------- Accessibility ---------------- */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute;
  left: 0; top: -100%;
  background: var(--ink);
  color: var(--press);
  padding: 0.7rem 1.2rem;
  border-radius: 0 0 var(--radius-sm) 0;
  z-index: var(--z-toast);
  transition: top var(--dur) var(--ease-out);
}
.skip-link:focus { top: 0; color: var(--press); }

/* ---------------- Mobile nav ---------------- */
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    height: 100dvh;           /* full height (the frosted header is the containing block; dvh handles the mobile address bar) */
    width: min(80%, 320px);
    background: var(--surface);
    border-left: 1px solid var(--border);
    box-shadow: -8px 0 32px rgba(22, 24, 28, 0.16);
    padding: 5rem 1.25rem 2rem;
    display: none;            /* closed: removed from layout so it adds no horizontal overflow */
    flex-direction: column;
    overflow-y: auto;
  }
  .nav-menu.open { display: flex; }   /* opened by the burger (nav.js toggles .open) */
  .menu { flex-direction: column; align-items: flex-start; gap: 0.25rem; }
  .menu a::after { content: none; }
  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding-left: 1rem;
  }
}