/* =============================================================================
   FIRMWAREFILE.UK — Global Header Styles
   File: header.css
   Loaded on: ALL pages via wp_enqueue_scripts (no page condition)
   Contains: Design tokens + reset base + site header + mobile nav
============================================================================= */

/* ─────────────────────────────────────────────
   DESIGN TOKENS
   These tokens are shared across all templates.
   front-page.css depends on these being present.
───────────────────────────────────────────── */
:root {
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body:    'Satoshi', 'Inter', sans-serif;

  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --space-1: 0.25rem;  --space-2: 0.5rem;   --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem;  --space-6: 1.5rem;   --space-8: 2rem;    --space-10: 2.5rem;
  --space-12: 3rem;    --space-16: 4rem;    --space-20: 5rem;   --space-24: 6rem;

  /* Radius */
  --radius-sm: 0.375rem;  --radius-md: 0.5rem;    --radius-lg: 0.75rem;
  --radius-xl: 1rem;      --radius-2xl: 1.5rem;   --radius-full: 9999px;

  /* Motion */
  --transition: 200ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --content-default: 1100px;
  --content-wide:    1380px;
  --header-height:   64px;

  /* Colors — Light mode */
  --color-bg:               #f5f7fc;
  --color-surface:          #ffffff;
  --color-surface-2:        #f0f3fb;
  --color-surface-3:        #e8edf8;
  --color-surface-hover:    #e2e8f5;
  --color-border:           rgba(0, 0, 0, 0.08);
  --color-border-strong:    rgba(0, 0, 0, 0.15);
  --color-divider:          rgba(0, 0, 0, 0.05);
  --color-text:             #141820;
  --color-text-muted:       #5a6380;
  --color-text-faint:       #a8b0c8;
  --color-primary:          #2563eb;
  --color-primary-hover:    #1d4ed8;
  --color-primary-active:   #1e40af;
  --color-primary-dim:      rgba(37, 99, 235, 0.08);
  --color-primary-glow:     rgba(37, 99, 235, 0.15);
  --color-accent:           #0891b2;
  --color-accent-dim:       rgba(8, 145, 178, 0.08);
  --color-orange:           #ea580c;
  --color-orange-dim:       rgba(234, 88, 12, 0.08);
  --shadow-sm:  0 1px 3px  rgba(0,0,0,0.07);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.09);
  --shadow-lg:  0 16px 48px rgba(0,0,0,0.11);
  --shadow-glow: 0 0 24px rgba(37,99,235,0.1), 0 4px 16px rgba(0,0,0,0.08);
}

/* ─────────────────────────────────────────────
   RESET & BASE
───────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 8px);
}
body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}
img, svg { display: block; max-width: 100%; height: auto; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }
a  { color: inherit; text-decoration: none; }
ul { list-style: none; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.2; }
p  { text-wrap: pretty; }
a, button, [role="button"] {
  transition: color var(--transition), background var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition), opacity var(--transition);
}
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
::selection { background: var(--color-primary-dim); color: var(--color-text); }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* Shared layout containers */
.container       { max-width: var(--content-default); margin-inline: auto; padding-inline: var(--space-6); }
.container--wide { max-width: var(--content-wide);    margin-inline: auto; padding-inline: var(--space-6); }


/* ─────────────────────────────────────────────
   SITE HEADER
───────────────────────────────────────────── */
.fh-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  display: flex;
  align-items: center;
  background: rgba(245, 247, 252, 0.92);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--color-border);
  /* Subtle shadow on scroll — added via JS .is-scrolled class */
  transition: box-shadow var(--transition), background var(--transition);
}
.fh-header.is-scrolled {
  background: rgba(245, 247, 252, 0.97);
  box-shadow: var(--shadow-sm);
}

.fh-header-inner {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* ── Logo ── */
.fh-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
  text-decoration: none;
}
.fh-logo-icon {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}
.fh-logo-text {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
  letter-spacing: -0.01em;
}
.fh-logo-text span { color: var(--color-primary); }

/* ── Header Search ── */
.fh-header-search {
  flex: 1;
  max-width: 420px;
}
.fh-header-search form {
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  padding: 0 var(--space-3);
  height: 38px;
  gap: var(--space-2);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.fh-header-search form:focus-within {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}
.fh-hdr-search-icon {
  display: flex;
  align-items: center;
  color: var(--color-text-muted);
  flex-shrink: 0;
  pointer-events: none;
}
.fh-header-search input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  outline: none;
  font-size: var(--text-sm);
  color: var(--color-text);
  padding: 0;
}
.fh-header-search input::placeholder { color: var(--color-text-muted); }

/* ── Desktop Nav ── */
.fh-nav {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin-left: auto;
  flex-shrink: 0;
}
.fh-nav a {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  position: relative;
}
.fh-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}
/* Active/current page underline */
.fh-nav a.current-menu-item,
.fh-nav a[aria-current="page"] {
  color: var(--color-primary);
  background: var(--color-primary-dim);
}
/* External link icon style */
.fh-nav a.fh-nav-ext {
  display: flex;
  align-items: center;
  gap: 4px;
}
/* "Guides" CTA button style in nav */
.fh-nav a.fh-nav-cta {
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  font-weight: 600;
}
.fh-nav a.fh-nav-cta:hover {
  background: var(--color-primary-hover);
  color: #fff;
}

/* ── Mobile Menu Button (hamburger) ── */
.fh-menu-btn {
  display: none !important;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-left: auto;
  padding: 0;
  border-radius: var(--radius-md);
  border: 1px solid rgba(37, 99, 235, 0.18);
  background: rgba(37, 99, 235, 0.08);
  color: var(--color-primary);
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35);
  transition: background var(--transition),
              border-color var(--transition),
              color var(--transition),
              box-shadow var(--transition),
              transform var(--transition);
}

.fh-menu-btn svg {
  width: 20px;
  height: 20px;
  display: block;
  stroke: currentColor;
  stroke-width: 2.2;
  fill: none;
  pointer-events: none;
}

.fh-menu-btn:hover {
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.28);
  color: var(--color-primary-hover);
  transform: translateY(-1px);
}

.fh-menu-btn:active {
  transform: translateY(0);
  background: rgba(37, 99, 235, 0.16);
}

.fh-menu-btn[aria-expanded="true"] {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #ffffff;
  box-shadow: 0 0 0 3px var(--color-primary-dim);
}


/* ─────────────────────────────────────────────
   MOBILE NAV DRAWER
───────────────────────────────────────────── */
.fh-mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  z-index: 99;
  padding: var(--space-4) var(--space-5);
  flex-direction: column;
  gap: var(--space-1);
  overflow-y: auto;
  /* Slide-in animation */
  transform: translateY(-8px);
  opacity: 0;
  transition: transform var(--transition), opacity var(--transition);
}
.fh-mobile-nav.open {
  display: flex;
  transform: translateY(0);
  opacity: 1;
}

/* Mobile search bar inside drawer */
.fh-mobile-search {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-3);
}
.fh-mobile-search svg { flex-shrink: 0; color: var(--color-text-muted); }
.fh-mobile-search input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  outline: none;
  font-size: var(--text-sm);
  color: var(--color-text);
}
.fh-mobile-search input::placeholder { color: var(--color-text-muted); }

/* Mobile nav links */
.fh-mobile-nav a {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-text-muted);
}
.fh-mobile-nav a:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}
.fh-mobile-nav a .fh-mnav-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-primary);
  transition: background var(--transition);
}
.fh-mobile-nav a:hover .fh-mnav-icon {
  background: var(--color-primary-dim);
}
.fh-mobile-nav a .fh-mnav-label { display: flex; flex-direction: column; }
.fh-mobile-nav a .fh-mnav-title { font-size: var(--text-sm); font-weight: 600; color: var(--color-text); }
.fh-mobile-nav a .fh-mnav-desc  { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: 1px; }

.fh-mobile-nav-div {
  height: 1px;
  background: var(--color-divider);
  margin: var(--space-2) 0;
}

/* Guides CTA inside mobile nav */
.fh-mobile-nav-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: #fff !important;
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-top: var(--space-2);
}
.fh-mobile-nav-cta:hover {
  background: var(--color-primary-hover) !important;
  color: #fff !important;
}


/* ─────────────────────────────────────────────
   BREADCRUMB (inner pages)
   Shown between header and page content.
   Chip/pill style — icon + label side by side.
───────────────────────────────────────────── */
.fh-breadcrumb {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-2) 0;
}
.fh-breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-1);
  min-height: 36px;
}

/* All breadcrumb links — inline-flex to sit icon + text on ONE line */
.fh-breadcrumb a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  background: transparent;
  border: 1px solid transparent;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
  line-height: 1;
}
/* Override global svg { display: block } reset inside breadcrumb links */
.fh-breadcrumb a svg {
  display: inline-block;
  flex-shrink: 0;
  vertical-align: middle;
}
.fh-breadcrumb a:hover {
  color: var(--color-primary);
  background: var(--color-primary-dim);
  border-color: rgba(37, 99, 235, 0.15);
}
.fh-breadcrumb a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Chevron separator — SVG icon instead of text glyph */
.fh-breadcrumb-sep {
  display: inline-flex;
  align-items: center;
  color: var(--color-text-faint);
  flex-shrink: 0;
  line-height: 1;
}
.fh-breadcrumb-sep svg { display: inline-block; }

/* Current page chip — highlighted pill */
.fh-breadcrumb-current {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-dim);
  border: 1px solid rgba(37, 99, 235, 0.18);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  /* FIX: generous max-width so title is not aggressively cut */
  max-width: min(55ch, 70vw);
  line-height: 1;
}


/* ─────────────────────────────────────────────
   RESPONSIVE — MOBILE
───────────────────────────────────────────── */
@media (max-width: 768px) {
  /* Hide search bar and nav on mobile */
  .fh-header-search { display: none !important; }
  .fh-nav           { display: none !important; }

  /* Show hamburger */
  .fh-menu-btn { display: flex !important; }

  /* Tighter header padding on mobile */
  .fh-header-inner { padding-inline: var(--space-4); gap: var(--space-3); }
  .fh-logo-text    { font-size: 1rem; }
}

@media (max-width: 480px) {
  .fh-breadcrumb-current { max-width: min(40ch, 55vw); }
}