/* ===========================================
   Marc Kurz - IT Consulting
   Custom CSS
   =========================================== */

/* --- 1. Design Tokens --- */
:root {
  --color-primary: #002855;
  --color-primary-light: #004aad;
  --color-primary-dark: #001a3a;
  --color-accent: #0066cc;
  --color-bg: #f8f9fa;
  --color-bg-white: #ffffff;
  --color-text: #1a1a2e;
  --color-text-light: #4a4a6a;
  --color-text-muted: #6b7280;
  --color-border: #e5e7eb;
  --color-hero-overlay: linear-gradient(135deg, rgba(0, 20, 50, 0.35) 0%, rgba(0, 40, 85, 0.55) 100%);

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;
  --line-height: 1.7;

  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  --container-max: 920px;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --transition: 0.2s ease;
}

/* --- 2. Reset / Base --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

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

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

/* --- 3. Typography --- */
h1, h2, h3, h4 {
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 700;
}

h1 { font-size: var(--font-size-3xl); margin-bottom: var(--space-lg); }
h2 { font-size: var(--font-size-2xl); margin-bottom: var(--space-md); margin-top: var(--space-xl); }
h3 { font-size: var(--font-size-xl); margin-bottom: var(--space-sm); margin-top: var(--space-lg); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text);
}

a {
  color: var(--color-primary-light);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

ul, ol {
  padding-left: 1.5rem;
  margin-bottom: var(--space-md);
}

li {
  margin-bottom: var(--space-xs);
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-xl) 0;
}

blockquote {
  border-left: 3px solid var(--color-primary-light);
  padding-left: var(--space-md);
  color: var(--color-text-light);
  font-style: italic;
  margin: var(--space-lg) 0;
}

strong {
  font-weight: 600;
}

/* --- 4. Layout --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

main {
  padding: var(--space-xl) 0 var(--space-2xl);
  min-height: 50vh;
}

/* --- 5. Header & Navigation --- */
.site-header {
  background: var(--color-bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.site-logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
}

.site-logo:hover {
  text-decoration: none;
  color: var(--color-primary-light);
}

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

.nav-link {
  padding: var(--space-sm) var(--space-md);
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--radius);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-bg);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-primary);
  background-color: rgba(0, 40, 85, 0.08);
}

.lang-switch {
  margin-left: var(--space-sm);
  border-left: 1px solid var(--color-border);
  padding-left: var(--space-md);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition);
}

.hamburger {
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

/* --- 6. Hero Section --- */
.hero {
  background-size: cover;
  background-position: center;
  position: relative;
  min-height: 400px;
  display: flex;
  align-items: stretch;
}

.hero-overlay {
  background: var(--color-hero-overlay);
  backdrop-filter: blur(1px);
  width: 100%;
  display: flex;
  align-items: center;
  padding: var(--space-2xl) 0;
}

.hero-content {
  text-align: center;
  color: #fff;
}

.hero-content h1 {
  color: #fff;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.hero-tagline {
  font-size: var(--font-size-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-lg);
  font-weight: 400;
}

/* --- 7. Buttons --- */
.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn:hover {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: #fff;
}

.btn-outline {
  background-color: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.7);
}

.btn-outline:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

/* --- 8. Services / Cards --- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.service-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), transform var(--transition);
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card .card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-md);
}

.service-card h3 {
  font-size: var(--font-size-lg);
  margin-top: 0;
  margin-bottom: var(--space-sm);
}

.service-card p {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
  margin-bottom: 0;
}

/* --- 9. Project Cards --- */
.project-card {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
}

.project-card h3 {
  margin-top: 0;
}

.project-card .project-logo {
  max-height: 50px;
  margin-bottom: var(--space-md);
}

/* --- 10. About / Intro --- */
.intro-row {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
  margin-top: var(--space-lg);
}

.intro-photo {
  width: 220px;
  min-width: 220px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.intro-text p:first-child {
  font-size: var(--font-size-lg);
}

/* --- 11. Contact Form --- */
.contact-form {
  max-width: 600px;
  margin-top: var(--space-lg);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-xs);
  color: var(--color-text);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: var(--font-size-base);
  font-family: var(--font-family);
  transition: border-color var(--transition), box-shadow var(--transition);
  background: var(--color-bg-white);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(0, 74, 173, 0.1);
}

.form-consent {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-md);
}

/* --- 12. Contact CTA --- */
.contact-cta {
  background: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  text-align: center;
  margin-top: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.contact-cta h2 {
  margin-top: 0;
}

.contact-cta p {
  color: var(--color-text-light);
  max-width: 500px;
  margin: 0 auto var(--space-md);
}

.contact-email {
  margin-top: var(--space-md);
}

.contact-email a {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* --- 13. Footer --- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-xl) 0;
  margin-top: var(--space-2xl);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.site-footer a {
  color: rgba(255, 255, 255, 0.8);
}

.site-footer a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
}

.footer-copy {
  font-size: var(--font-size-sm);
}

/* --- 14. Utility --- */
.text-center { text-align: center; }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mb-lg { margin-bottom: var(--space-lg); }

/* --- 15. Responsive --- */
@media (max-width: 768px) {
  :root {
    --font-size-3xl: 2rem;
    --font-size-2xl: 1.5rem;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg-white);
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: var(--shadow-md);
    gap: 0;
  }

  .site-nav.is-open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: var(--space-md);
  }

  .lang-switch {
    margin-left: 0;
    border-left: none;
    border-top: 1px solid var(--color-border);
    padding-left: var(--space-md);
    padding-top: var(--space-md);
  }

  .hero {
    min-height: 300px;
  }

  .hero-content h1 {
    font-size: var(--font-size-2xl);
  }

  .intro-row {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .intro-photo {
    width: 180px;
    min-width: unset;
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .services-grid {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}