/* base.css — reset, typography, shared primitives for all three concepts.
   Every visual value (color, font, size, spacing, shadow, motion) references
   a custom property defined in the concept's design-tokens file. Structural
   CSS (display, grid, position) lives here and in concept layout files. */

*, *::before, *::after { box-sizing: border-box; }

* { margin: 0; }

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: var(--w-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Material grain: a fine monochrome film so the page reads as a surface,
   not a backlight. Each concept sets its own --grain-opacity. */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 180px 180px;
}
.site-header, main, .site-footer { position: relative; z-index: 2; }

img, picture, svg { display: block; max-width: 100%; height: auto; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--w-display);
  line-height: var(--leading-tight);
  letter-spacing: var(--track-display);
  text-transform: var(--display-case);
  color: var(--heading);
}

input, textarea, button, select { font: inherit; color: inherit; }

/* --- Layout primitives --- */

.shell {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--sec-pad); }

.sec-head { max-width: var(--maxw-text); margin-bottom: var(--s-10); }
.sec-head h2 { font-size: var(--text-2xl); margin-top: var(--s-3); }
.sec-head .lede { margin-top: var(--s-4); }

.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: var(--w-semibold);
  letter-spacing: var(--track-wider);
  text-transform: uppercase;
  color: var(--accent);
}

.lede {
  font-size: var(--text-lg);
  line-height: var(--leading-body);
  color: var(--text-mute);
  max-width: var(--maxw-text);
}

/* --- Header skeleton (concept files style the skin) --- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background: var(--header-bg);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.site-header .shell {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  min-height: var(--nav-h);
  padding-block: var(--s-2);
}
/* Landmark wrapper only; contents keeps .nav-links the header's flex child. */
.primary-nav { display: contents; }
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  margin-left: auto;
  list-style: none;
  padding: 0;
}
.nav-links a {
  font-size: var(--text-sm);
  font-weight: var(--w-semibold);
  letter-spacing: var(--track-wide);
  color: var(--text-mute);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color var(--dur) var(--ease);
}
.nav-links a:hover { color: var(--heading); }
/* Drawer-only rows: language switch on top, call CTA on the bottom. */
.nav-lang-item, .nav-call-item { display: none; }
@media (max-width: 860px) { .nav-links { display: none; } }

/* --- Services dropdown --- */
/* Opens on hover and on keyboard focus via CSS; the caret button toggles
   .open for touch. shared.js keeps aria-expanded in sync. */
.nav-dd {
  position: relative;
  display: flex;
  align-items: center;
}
.nav-dd-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--text-mute);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.nav-dd-toggle:hover { color: var(--heading); }
.nav-dd-caret {
  width: 0.85em;
  height: 0.85em;
  transition: transform var(--dur) var(--ease);
}
.nav-dd.open .nav-dd-caret { transform: rotate(180deg); }
.nav-dd-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: calc(-1 * var(--s-4));
  min-width: 15rem;
  margin: 0;
  padding: var(--s-2);
  list-style: none;
  background: var(--bg-deep);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}
.nav-dd:hover .nav-dd-menu,
.nav-dd:focus-within .nav-dd-menu,
.nav-dd.open .nav-dd-menu { display: block; }
.nav-dd-menu a {
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 44px;
  padding: var(--s-2) var(--s-4);
  border-radius: var(--radius);
  font-size: var(--text-sm);
  font-weight: var(--w-semibold);
  letter-spacing: var(--track-wide);
  color: var(--text-mute);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-dd-menu a:hover { color: var(--heading); background: var(--surface); }

/* --- Mobile menu --- */
.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--heading);
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.nav-toggle:hover { border-color: var(--accent); color: var(--accent); }
.nav-toggle svg { width: 1.4rem; height: 1.4rem; }
.nav-toggle .icon-close { display: none; }
.nav-open .nav-toggle .icon-open { display: none; }
.nav-open .nav-toggle .icon-close { display: block; }

@media (max-width: 860px) {
  /* The bar keeps one job on a phone: the call pill. Language moves into
     the drawer, the readable number into the drawer's call row. */
  .site-header .shell > .lang-toggle, .site-header .header-phone { display: none; }
  .site-header .header-call { display: inline-flex; margin-left: auto; }
  .nav-toggle { display: inline-flex; }
  /* Drawer open: freeze the page behind it. Also keeps the drawer's full-height
     scrim from adding scrollable area past the footer. Scoped to the drawer
     breakpoint so a rotate to tablet width can never strand a locked body. */
  body.nav-locked { overflow: hidden; }
  /* Slim the sticky bar: the lockup stays legible at 44px and the header
     stops eating ~80px of a phone viewport. */
  .logo .logo-lockup { height: 44px; }
  /* Scrim: blurs and dims the page behind the open drawer so the panel reads
     as the only live surface. Absolute (not fixed) because the header's own
     backdrop-filter makes it the containing block for fixed descendants. */
  .site-header.nav-open::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: 100vh;
    z-index: 1;
    background: var(--nav-scrim);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    pointer-events: none;
  }
  /* The link row folds out as a panel under the sticky header. */
  .site-header.nav-open .nav-links {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 2;
    margin: 0;
    padding: var(--s-4) var(--gutter) var(--s-6);
    background: var(--bg-deep);
    border-bottom: 1px solid var(--line-strong);
    box-shadow: var(--shadow-1);
  }
  .site-header.nav-open .nav-links > li { display: block; }
  /* Dropdown renders expanded inside the panel: no nested menus on a phone. */
  .site-header.nav-open .nav-dd { display: block; }
  .site-header.nav-open .nav-dd-toggle { display: none; }
  .site-header.nav-open .nav-dd-menu {
    display: block;
    position: static;
    min-width: 0;
    padding: 0 0 0 var(--s-4);
    background: transparent;
    border: 0;
    box-shadow: none;
  }
  .site-header.nav-open .nav-lang-item {
    display: block;
    border-bottom: 1px solid var(--line);
    margin-bottom: var(--s-2);
  }
  .site-header.nav-open .nav-lang-item .lang-toggle { width: 100%; padding-inline: 0; }
  .site-header.nav-open .nav-call-item { display: block; margin-top: var(--s-5); }
  /* Outranks the .nav-links a color so the pill keeps dark-on-yellow text. */
  .site-header.nav-open .nav-call-item .btn { width: 100%; color: var(--on-accent); }
}

/* Brand lockup: tight-cropped horizontal logo with its own yellow field,
   so it reads as a small yellow plaque in the header on any background. */
.logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.logo .logo-lockup {
  display: block;
  height: 56px;
  width: auto;
  border-radius: var(--radius);
}

/* Footer lockup: a small yellow plaque on its own row above the fine print. */
.footer-brand { margin-bottom: var(--s-6); }
.footer-logo {
  display: block;
  width: min(260px, 60vw);
  height: auto;
  border-radius: var(--radius);
}

/* Language toggle: a quiet utility, not a CTA — the call button owns the
   accent. Rendered in the bar on desktop, in the drawer and footer on mobile. */
.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  min-height: 44px;
  padding: var(--s-2) var(--s-3);
  border: 0;
  background: transparent;
  color: var(--text-mute);
  font-size: var(--text-sm);
  font-weight: var(--w-semibold);
  letter-spacing: var(--track-wide);
  cursor: pointer;
  transition: color var(--dur) var(--ease);
}
.lang-toggle:hover { color: var(--accent); }
.footer-lang { padding-inline: 0; }

/* Header phone: readable number on desktop, tap-to-call pill on mobile. */
.header-phone {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: var(--text-sm);
  font-weight: var(--w-bold);
  letter-spacing: var(--track-wide);
  color: var(--heading);
  transition: color var(--dur) var(--ease);
}
.header-phone:hover { color: var(--accent); }
.header-call {
  display: none;
  align-items: center;
  gap: var(--s-2);
  min-height: 44px;
  padding: var(--s-2) var(--s-4);
  border-radius: var(--radius-pill);
  background: var(--accent);
  color: var(--on-accent);
  font-size: var(--text-sm);
  font-weight: var(--w-bold);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  transition: background var(--dur) var(--ease);
}
.header-call:hover { background: var(--accent-strong); }
.header-call svg { width: 1rem; height: 1rem; }

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  font-size: var(--text-sm);
  font-weight: var(--w-bold);
  letter-spacing: var(--track-wide);
  text-transform: uppercase;
  padding: var(--s-4) var(--s-7);
  min-height: 48px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease),
              border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.btn-primary { background: var(--accent); color: var(--on-accent); }
.btn-primary:hover { background: var(--accent-strong); transform: translateY(-1px); }
.btn-ghost { border-color: var(--line-strong); color: var(--heading); background: transparent; }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* --- Forms (estimate stub) --- */

.field { display: grid; gap: var(--s-2); }
.field label {
  font-size: var(--text-sm);
  font-weight: var(--w-semibold);
  color: var(--heading);
}
.field input, .field textarea {
  width: 100%;
  padding: var(--s-4);
  background: var(--field-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--heading);
  min-height: 48px;
  transition: border-color var(--dur) var(--ease);
}
.field input::placeholder, .field textarea::placeholder { color: var(--text-faint); }
.field input:focus, .field textarea:focus { border-color: var(--accent); outline: none; }
.field textarea { resize: vertical; min-height: 120px; }
/* Honeypot: removed from the visual page and tab order; bots that fill
   every input still see it. Not display:none — some bots skip those. */
.field-hp {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.form-note {
  font-size: var(--text-sm);
  color: var(--text-faint);
}
.form-status {
  font-size: var(--text-sm);
  font-weight: var(--w-semibold);
  color: var(--accent);
  min-height: 1.5em;
}

/* --- Accessibility --- */

.skip-link {
  position: absolute;
  left: var(--s-4); top: var(--s-4);
  transform: translateY(-300%);
  background: var(--accent);
  color: var(--on-accent);
  padding: var(--s-3) var(--s-5);
  border-radius: var(--radius);
  font-weight: var(--w-bold);
  z-index: calc(var(--z-nav) + 1);
  transition: transform var(--dur-fast) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

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

/* --- Scroll reveal --- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur-slow) var(--ease-out),
              transform var(--dur-slow) var(--ease-out);
}
.reveal.is-visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
}

/* --- Footer skeleton --- */

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--s-10);
  color: var(--text-mute);
  font-size: var(--text-sm);
}
.site-footer .shell {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-4) var(--s-10);
  justify-content: space-between;
  align-items: baseline;
}