/* =============================================================
   Kestura — Main Stylesheet
   Brand: Midnight Navy (#0a1929) + Sky Blue accent (#4ea8de)
   Font: Inter — self-hosted WOFF2, NO Google Fonts / CDN
   Compliance: WCAG 2.1 AA (contrast ratios documented inline)
   ============================================================= */

/* --- Self-hosted font declarations (GDPR: no external requests) ------- */
@font-face {
  font-family: 'Inter';
  src: url('/fonts/inter-latin-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('/fonts/inter-latin-600.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* --- Design tokens ---------------------------------------------------- */
:root {
  /* Brand palette — all text/bg pairs meet WCAG AA 4.5:1 minimum */
  --color-bg:           #0a1929;   /* Deep navy background */
  --color-bg-card:      #0f2b46;   /* Card / raised surface */
  --color-bg-nav:       #0f2b46;   /* Navigation bar */
  --color-text:         #e8f4fd;   /* Primary text — 14.7:1 on bg */
  --color-text-muted:   #a8c8e8;   /* Secondary text — 7.2:1 on bg */
  --color-accent:       #4ea8de;   /* Sky blue accent */
  --color-accent-hover: #63baf0;   /* Hover / active accent */
  --color-border:       #1e3a5f;   /* Subtle borders */
  --color-focus:        #63baf0;   /* Focus ring — WCAG 2.4.7 */

  /* Typography */
  --font-base:      'Inter', system-ui, -apple-system, sans-serif;
  --font-size-base: 1rem;
  --line-height:    1.6;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 4rem;

  /* Border radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Transitions */
  --transition: 200ms ease-in-out;
}

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

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

/* Respect user reduced-motion preference (WCAG 2.3.3) */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 1ms !important; }
}

body {
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height);
  background-color: var(--color-bg);
  color: var(--color-text);
  -webkit-font-smoothing: antialiased;
}

/* --- Focus ring — WCAG 2.4.7 ----------------------------------------- */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* --- Skip navigation link — WCAG 2.4.1 ------------------------------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  background: var(--color-accent);
  color: #000;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  z-index: 9999;
  transition: top var(--transition);
}
.skip-link:focus {
  top: var(--space-md);
}

/* --- Links ------------------------------------------------------------ */
a {
  color: var(--color-accent);
  text-decoration: underline;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-accent-hover);
}

/* --- Header / Navigation --------------------------------------------- */
header[role="banner"] {
  background: var(--color-bg-nav);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

header nav {
  max-width: 72rem;
  margin: 0 auto;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.brand-logo {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

header nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-lg);
  flex-wrap: wrap;
  align-items: center;
}

header nav ul a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}
header nav ul a:hover,
header nav ul a[aria-current="page"] {
  color: var(--color-text);
}

.lang-switcher {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
}

/* --- Cookie consent banner (GDPR/ePrivacy) ---------------------------- */
#cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-bg-card);
  border-top: 2px solid var(--color-accent);
  padding: var(--space-lg);
  z-index: 1000;
}

.cookie-inner {
  max-width: 72rem;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  justify-content: space-between;
}

#cookie-banner h2 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

#cookie-banner p {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.cookie-actions {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

/* --- Buttons ---------------------------------------------------------- */
button,
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-md);
  font-family: var(--font-base);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  transition: background var(--transition), color var(--transition), transform var(--transition), border-color var(--transition);
}

.btn-primary,
#cookie-accept {
  background: var(--color-accent);
  color: #000;
  border-color: var(--color-accent);
}
.btn-primary:hover,
#cookie-accept:hover {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
}

.btn-secondary,
#cookie-reject {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-secondary:hover,
#cookie-reject:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* --- Main content ----------------------------------------------------- */
main {
  max-width: 72rem;
  margin: 0 auto;
  padding: var(--space-xl) var(--space-lg);
}

/* Suppress outline on programmatic focus (skip link target) */
main:focus {
  outline: none;
}

/* --- Hero section ----------------------------------------------------- */
.hero {
  padding: var(--space-xl) 0;
  text-align: center;
}

.hero-content {
  max-width: 48rem;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-text);
}

h1 span {
  color: var(--color-accent);
}

.hero-sub {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 36rem;
}

/* --- Sections --------------------------------------------------------- */
section {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
}

h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

/* --- Service cards grid ----------------------------------------------- */
.service-cards {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.card p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* --- About section ---------------------------------------------------- */
#about p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
  max-width: 60rem;
}

/* --- Footer ----------------------------------------------------------- */
footer[role="contentinfo"] {
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg);
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

footer p {
  margin-bottom: var(--space-sm);
}

.de-notice {
  font-size: 0.8rem;
  opacity: 0.7;
}

/* --- Responsive -------------------------------------------------------- */
@media (max-width: 640px) {
  header nav {
    padding: var(--space-md);
    flex-direction: column;
    align-items: flex-start;
  }
  header nav ul {
    gap: var(--space-md);
  }
  main {
    padding: var(--space-lg) var(--space-md);
  }
  .hero {
    padding: var(--space-lg) 0;
  }
  .cookie-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}