/* ============================================================
   Benjamin Willemsen — Freelancer Website
   style.css

   Fonts: DM Serif Display + DM Sans (lokal hosten)
   Bitte Fontdateien unter /fonts/ ablegen:
     fonts/DMSerifDisplay-Regular.woff2
     fonts/DMSans-Regular.woff2
     fonts/DMSans-Medium.woff2
     fonts/DMSans-Bold.woff2
   Download: fonts.google.com → "Download family"
   ============================================================ */

/* --- Font Faces ------------------------------------------ */
@font-face {
  font-family: 'DM Serif Display';
  src: url('fonts/DMSerifDisplay-Regular.woff2') format('woff2'),
       url('fonts/DMSerifDisplay-Regular.woff')  format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'DM Sans';
  src: url('fonts/DMSans-Regular.woff2') format('woff2'),
       url('fonts/DMSans-Regular.woff')  format('woff');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'DM Sans';
  src: url('fonts/DMSans-Medium.woff2') format('woff2'),
       url('fonts/DMSans-Medium.woff')  format('woff');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'DM Sans';
  src: url('fonts/DMSans-Bold.woff2') format('woff2'),
       url('fonts/DMSans-Bold.woff')  format('woff');
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

/* --- Design Tokens --------------------------------------- */
:root {
  /* Colors */
  --c-bg:           #F7F6F2;
  --c-text:         #1A1918;
  --c-muted:        #6B6A68;
  --c-accent:       #1A4E8F;
  --c-accent-hover: #153D72;
  --c-accent-light: #E8EFF8;
  --c-white:        #FFFFFF;
  --c-border:       #E0DDD7;
  --c-card:         #FFFFFF;
  --c-success:      #1E6E42;
  --c-error:        #B91C1C;

  /* Typography */
  --f-display: 'DM Serif Display', Georgia, 'Times New Roman', serif;
  --f-body:    'DM Sans', system-ui, -apple-system, sans-serif;

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

  /* Layout */
  --max-w:    1140px;
  --nav-h:    72px;
  --px:       1.5rem;

  /* Radii */
  --r-sm:   4px;
  --r-md:   8px;
  --r-lg:   16px;
  --r-full: 9999px;

  /* Shadows */
  --sh-sm: 0 1px 3px rgba(26,25,24,.06);
  --sh-md: 0 4px 16px rgba(26,25,24,.09);
  --sh-lg: 0 8px 32px rgba(26,78,143,.14);

  /* Transitions */
  --t-fast: 150ms ease;
  --t-base: 250ms ease;
}

/* --- Reset ---------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--c-text);
  background: var(--c-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: inherit; }

/* --- Typography ----------------------------------------- */
h1, h2, h3, h4 { font-family: var(--f-display); line-height: 1.18; color: var(--c-text); }
h1 { font-size: clamp(2.2rem, 5vw,   3.8rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }

/* --- Layout --------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--px);
}
main { flex: 1; }
.section { padding: var(--s-20) 0; }

/* --- Skip Link ------------------------------------------ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  padding: .5rem 1rem;
  background: var(--c-accent);
  color: var(--c-white);
  border-radius: var(--r-sm);
  z-index: 1000;
  font-size: .85rem;
  transition: top var(--t-fast);
}
.skip-link:focus { top: 1rem; }

/* --- Navigation ----------------------------------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--c-white);
  border-bottom: 1px solid var(--c-border);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
}
.nav-brand { display: flex; flex-direction: column; line-height: 1.2; flex-shrink: 0; }
.nav-brand-name { font-family: var(--f-display); font-size: 1.1rem; }
.nav-brand-role {
  font-size: .7rem;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--c-accent);
}
.nav-links { display: flex; align-items: center; gap: var(--s-6); }
.nav-link {
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-muted);
  position: relative;
  transition: color var(--t-fast);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 2px;
  background: var(--c-accent);
  transition: width var(--t-base);
}
.nav-link:hover, .nav-link.active { color: var(--c-accent); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }

.nav-actions { display: flex; align-items: center; gap: var(--s-3); }
.nav-lang-btn {
  padding: var(--s-1) var(--s-3);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--c-accent);
  border: 1.5px solid var(--c-accent);
  border-radius: var(--r-full);
  transition: background var(--t-fast), color var(--t-fast);
}
.nav-lang-btn:hover { background: var(--c-accent); color: var(--c-white); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--s-2);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text);
  transition: transform var(--t-base), opacity var(--t-base);
  transform-origin: center;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Buttons -------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  padding: var(--s-3) var(--s-8);
  font-size: .95rem;
  font-weight: 500;
  border-radius: var(--r-sm);
  border: 2px solid transparent;
  font-family: var(--f-body);
  transition: background var(--t-fast), color var(--t-fast),
              box-shadow var(--t-fast), transform var(--t-fast);
  cursor: pointer;
}
.btn-primary { background: var(--c-accent); color: var(--c-white); }
.btn-primary:hover {
  background: var(--c-accent-hover);
  box-shadow: var(--sh-lg);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  color: var(--c-accent);
  border-color: var(--c-accent);
}
.btn-outline:hover { background: var(--c-accent); color: var(--c-white); }
.btn-white { background: var(--c-white); color: var(--c-accent); }
.btn-white:hover { background: var(--c-accent-light); }
.btn[aria-busy="true"] { opacity: .65; pointer-events: none; cursor: not-allowed; }

/* --- Section Labels ------------------------------------- */
.section-label {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--s-3);
}
.section-header { margin-bottom: var(--s-12); }
.section-header h2 { margin-bottom: var(--s-3); }
.section-header p { color: var(--c-muted); max-width: 60ch; }

/* --- Hero (Index) --------------------------------------- */
.hero {
  padding: var(--s-24) 0;
  border-bottom: 1px solid var(--c-border);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -160px; right: -160px;
  width: 540px; height: 540px;
  background: radial-gradient(circle, var(--c-accent-light) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  max-width: 780px;
  animation: fadeUp .55s ease both;
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--s-5);
}
.hero-eyebrow::before {
  content: '';
  display: block;
  width: 26px; height: 2px;
  background: var(--c-accent);
}
.hero-headline {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  line-height: 1.08;
  margin-bottom: var(--s-6);
}
.hero-subline {
  font-size: 1.1rem;
  line-height: 1.75;
  color: var(--c-muted);
  max-width: 58ch;
  margin-bottom: var(--s-10);
}
.hero-actions { display: flex; align-items: center; gap: var(--s-4); flex-wrap: wrap; }

/* --- Tech Stack Tags ------------------------------------ */
.stack-section {
  padding: var(--s-10) 0;
  border-bottom: 1px solid var(--c-border);
}
.stack-inner {
  display: flex;
  align-items: center;
  gap: var(--s-5);
  flex-wrap: wrap;
}
.stack-label {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--c-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.stack-tags { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.stack-tag {
  display: inline-block;
  padding: var(--s-1) var(--s-4);
  font-size: .82rem;
  font-weight: 500;
  color: var(--c-accent);
  background: var(--c-accent-light);
  border: 1px solid rgba(26,78,143,.18);
  border-radius: var(--r-full);
  transition: background var(--t-fast), color var(--t-fast);
}
.stack-tag:hover { background: var(--c-accent); color: var(--c-white); }

/* --- Service Cards -------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-6);
}
.service-card {
  background: var(--c-card);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-8);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--t-base), transform var(--t-base);
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--c-accent);
  opacity: 0;
  transition: opacity var(--t-base);
}
.service-card:hover { box-shadow: var(--sh-lg); transform: translateY(-3px); }
.service-card:hover::before { opacity: 1; }

.service-icon {
  width: 48px; height: 48px;
  background: var(--c-accent-light);
  border-radius: var(--r-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--s-5);
  color: var(--c-accent);
}
.service-icon svg { width: 24px; height: 24px; }
.service-title {
  font-family: var(--f-display);
  font-size: 1.25rem;
  margin-bottom: var(--s-3);
}
.service-desc { font-size: .92rem; line-height: 1.72; color: var(--c-muted); }

/* --- CTA Band ------------------------------------------- */
.cta-band { background: var(--c-accent); padding: var(--s-16) 0; }
.cta-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-8);
}
.cta-band-text h2 { color: var(--c-white); margin-bottom: var(--s-2); }
.cta-band-text p  { color: rgba(255,255,255,.78); max-width: 52ch; }

/* --- Page Hero (inner pages) ---------------------------- */
.page-hero {
  padding: var(--s-16) 0 var(--s-12);
  border-bottom: 1px solid var(--c-border);
}
.page-hero .section-label { margin-bottom: var(--s-3); }
.page-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: var(--s-3); }
.page-hero p  { font-size: 1.05rem; color: var(--c-muted); max-width: 60ch; }

/* --- About Page ----------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--s-16);
  align-items: start;
}
.about-portrait {
  aspect-ratio: 4/5;
  background: var(--c-accent-light);
  border-radius: var(--r-lg);
  border: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-muted);
  font-size: .82rem;
  text-align: center;
  padding: var(--s-4);
}
.about-bio p {
  color: var(--c-muted);
  margin-bottom: var(--s-4);
  font-size: 1.02rem;
  line-height: 1.78;
}
.about-bio h2 { margin-bottom: var(--s-6); }

.expertise-section { padding: var(--s-20) 0; background: var(--c-card); border-top: 1px solid var(--c-border); }
.expertise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-4);
  margin-top: var(--s-10);
}
.expertise-item {
  padding: var(--s-5);
  background: var(--c-bg);
  border: 1px solid var(--c-border);
  border-radius: var(--r-md);
}
.expertise-item-icon {
  color: var(--c-accent);
  margin-bottom: var(--s-3);
}
.expertise-item-icon svg { width: 22px; height: 22px; }
.expertise-item-title {
  font-weight: 700;
  font-size: .9rem;
  margin-bottom: var(--s-1);
}
.expertise-item-sub { font-size: .8rem; color: var(--c-muted); }

/* --- Contact Page --------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--s-16);
  align-items: start;
}
.contact-info h2 { margin-bottom: var(--s-4); }
.contact-info p  { color: var(--c-muted); margin-bottom: var(--s-6); }
.contact-details { display: flex; flex-direction: column; gap: var(--s-3); }
.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  font-size: .9rem;
  color: var(--c-muted);
}
.contact-detail svg { color: var(--c-accent); flex-shrink: 0; margin-top: 2px; }

.contact-form {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r-lg);
  padding: var(--s-8);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-4);
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--s-2);
  margin-bottom: var(--s-5);
}
.form-label {
  font-size: .84rem;
  font-weight: 500;
  color: var(--c-text);
}
.form-label .req { color: var(--c-error); margin-left: 2px; }
.form-input,
.form-textarea {
  padding: var(--s-3) var(--s-4);
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: .95rem;
  color: var(--c-text);
  background: var(--c-bg);
  width: 100%;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--c-accent);
  background: var(--c-white);
}
.form-textarea { resize: vertical; min-height: 150px; }

.form-check {
  display: flex;
  align-items: flex-start;
  gap: var(--s-3);
  margin-bottom: var(--s-6);
}
.form-check input[type="checkbox"] {
  margin-top: 2px;
  flex-shrink: 0;
  width: 16px; height: 16px;
  accent-color: var(--c-accent);
}
.form-check-label { font-size: .82rem; color: var(--c-muted); line-height: 1.55; }
.form-check-label a { color: var(--c-accent); text-decoration: underline; }

/* Honeypot */
.form-honeypot { position: absolute; left: -9999px; opacity: 0; pointer-events: none; }

.form-message {
  display: none;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--r-sm);
  font-size: .88rem;
  font-weight: 500;
  margin-top: var(--s-4);
}
.form-message.success {
  display: block;
  background: rgba(30,110,66,.08);
  color: var(--c-success);
  border: 1px solid rgba(30,110,66,.25);
}
.form-message.error {
  display: block;
  background: rgba(185,28,28,.07);
  color: var(--c-error);
  border: 1px solid rgba(185,28,28,.22);
}

/* --- Legal Pages ---------------------------------------- */
.legal-content { max-width: 780px; padding: var(--s-16) 0; }
.legal-content h2 {
  font-size: 1.35rem;
  margin-top: var(--s-10);
  margin-bottom: var(--s-3);
}
.legal-content h3 {
  font-size: 1.05rem;
  margin-top: var(--s-6);
  margin-bottom: var(--s-2);
}
.legal-content p { margin-bottom: var(--s-4); line-height: 1.72; }
.legal-content ul { list-style: disc; padding-left: var(--s-6); margin-bottom: var(--s-4); }
.legal-content ul li { margin-bottom: var(--s-2); line-height: 1.6; }
.legal-content a { color: var(--c-accent); text-decoration: underline; }
.legal-content address { font-style: normal; line-height: 1.8; }

/* --- Footer --------------------------------------------- */
.site-footer {
  background: var(--c-text);
  color: var(--c-white);
  padding: var(--s-10) 0 var(--s-6);
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-6);
  flex-wrap: wrap;
  padding-bottom: var(--s-6);
  margin-bottom: var(--s-6);
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.footer-brand-name { font-family: var(--f-display); font-size: 1.15rem; }
.footer-brand-role {
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: rgba(255,255,255,.45);
  margin-top: 2px;
}
.footer-links { display: flex; gap: var(--s-6); }
.footer-link {
  font-size: .85rem;
  color: rgba(255,255,255,.55);
  transition: color var(--t-fast);
}
.footer-link:hover { color: var(--c-white); }
.footer-bottom { font-size: .78rem; color: rgba(255,255,255,.35); }

/* --- Responsive ----------------------------------------- */
@media (max-width: 600px) {
  :root {
    --px:    1.25rem;
    --nav-h: 64px;
  }

  /* Nav */
  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h); left: 0; right: 0;
    background: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--s-4) var(--px);
    gap: var(--s-4);
    box-shadow: var(--sh-md);
    z-index: 99;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .site-nav { position: relative; }

  /* Hero */
  .hero { padding: var(--s-16) 0; }
  .hero::before { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }

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

  /* CTA */
  .cta-band .container { flex-direction: column; text-align: center; }
  .cta-band-text p { max-width: none; }

  /* About */
  .about-grid { grid-template-columns: 1fr; }
  .about-portrait { max-width: 200px; }
  .expertise-grid { grid-template-columns: 1fr 1fr; }

  /* Contact */
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }

  /* Footer */
  .footer-inner { flex-direction: column; align-items: flex-start; }
  .footer-links { flex-wrap: wrap; gap: var(--s-4); }
}