/* ═══════════════════════════════════════
   TOKENS
═══════════════════════════════════════ */
:root {
  --bg:         #F7F5F0;
  --bg-alt:     #EDEAE3;
  --bg-nav:     rgba(247,245,240,0.9);
  --text:       #1A1916;
  --muted:      #6E6C67;
  --border:     rgba(26,25,22,0.12);
  --border-mid: rgba(26,25,22,0.2);

  --serif: 'DM Serif Display', Georgia, serif;
  --sans:  'DM Sans', sans-serif;
  --max:   1100px;
  --pad:   clamp(1.5rem, 5vw, 4rem);

  --fs-xs:  0.75rem;
  --fs-sm:  0.875rem;
  --fs-md:  1rem;
  --fs-lg:  1.125rem;
  --fs-h3:  1.05rem;

  --ease: 0.22s ease;
}

[data-theme="dark"] {
  --bg:         #111110;
  --bg-alt:     #1B1A18;
  --bg-nav:     rgba(17,17,16,0.92);
  --text:       #EDE9E0;
  --muted:      #888580;
  --border:     rgba(237,233,224,0.1);
  --border-mid: rgba(237,233,224,0.2);
}

/* ═══════════════════════════════════════
   RESET
═══════════════════════════════════════ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
a { color: inherit; text-decoration: none; }

body {
  font-family: var(--sans);
  font-size: var(--fs-md);
  line-height: 1.7;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  transition: background var(--ease), color var(--ease);
}

/* ═══════════════════════════════════════
   NAV
═══════════════════════════════════════ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem var(--pad);
  background: var(--bg-nav);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--ease), border-color var(--ease);
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.nav-center {
  display: flex;
  gap: 2rem;
}
.nav-center a {
  font-size: var(--fs-sm);
  color: var(--muted);
  letter-spacing: 0.03em;
  transition: color var(--ease);
}
.nav-center a:hover { color: var(--text); }

.nav-right { display: flex; align-items: center; gap: 0.75rem; }

/* Dark Mode Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  background: none;
  color: var(--muted);
  transition: color var(--ease), background var(--ease), border-color var(--ease);
  flex-shrink: 0;
}
.theme-toggle:hover { color: var(--text); background: var(--bg-alt); }
.theme-toggle:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

.icon-sun  { display: block; }
.icon-moon { display: none;  }
[data-theme="dark"] .icon-sun  { display: none;  }
[data-theme="dark"] .icon-moon { display: block; }

/* Mobile Menu */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-mid);
  border-radius: 4px;
  background: none;
  color: var(--text);
}
.nav-hamburger span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--ease), opacity var(--ease);
}

.nav-mobile {
  display: none;
  position: fixed;
  inset: 61px 0 0 0;
  background: var(--bg);
  z-index: 99;
  flex-direction: column;
  padding: 2rem var(--pad);
  gap: 1.5rem;
  border-top: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  font-size: 1.25rem;
  font-family: var(--serif);
  color: var(--text);
}

/* ═══════════════════════════════════════
   HERO
═══════════════════════════════════════ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem var(--pad) 5rem;
  position: relative;
  overflow: hidden;
}
.hero-content { max-width: 680px; }

.hero-eyebrow {
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
  opacity: 0;
}
.hero-title {
  font-family: var(--serif);
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 0.92;
  margin-bottom: 1.75rem;
  opacity: 0;
}
.hero-title em { font-style: italic; color: var(--muted); }

.hero-sub {
  font-size: var(--fs-lg);
  color: var(--muted);
  font-weight: 300;
  margin-bottom: 2.5rem;
  opacity: 0;
}
.hero-line {
  position: absolute;
  right: var(--pad);
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 40vh;
  background: var(--border-mid);
  opacity: 0;
}

/* ═══════════════════════════════════════
   BUTTON
═══════════════════════════════════════ */
.btn {
  display: inline-block;
  padding: 0.75rem 1.6rem;
  border: 1px solid var(--text);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text);
  background: transparent;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
  opacity: 0;
}
.btn--visible { opacity: 1; }
.btn:hover    { background: var(--text); color: var(--bg); }
.btn:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }

/* ═══════════════════════════════════════
   SECTIONS
═══════════════════════════════════════ */
.section {
  padding: 6rem var(--pad);
  max-width: var(--max);
  margin: 0 auto;
}
.section--alt {
  max-width: 100%;
  background: var(--bg-alt);
  padding: 6rem var(--pad);
  transition: background var(--ease);
}
.section--alt > .inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-title {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 3rem;
}

/* ═══════════════════════════════════════
   PROJEKTE
═══════════════════════════════════════ */
.projekte-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.projekt-card {
  background: var(--bg);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  transition: background var(--ease);
}
.projekt-card:hover { background: var(--bg-alt); }
.projekt-card--empty { opacity: 0.3; pointer-events: none; }

.projekt-num {
  font-family: var(--serif);
  font-size: 1.75rem;
  color: var(--border-mid);
  line-height: 1;
  margin-bottom: 1rem;
}
.projekt-card h3 {
  font-size: var(--fs-h3);
  font-weight: 500;
  margin-bottom: 0.6rem;
  line-height: 1.4;
}
.projekt-card p {
  font-size: var(--fs-sm);
  color: var(--muted);
  margin-bottom: 1.25rem;
  flex: 1;
}
.projekt-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
}
.projekt-tags li {
  font-size: 0.7rem;
  padding: 0.18rem 0.5rem;
  border: 1px solid var(--border-mid);
  letter-spacing: 0.04em;
  border-radius: 2px;
  color: var(--muted);
}
.projekt-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: opacity var(--ease);
  margin-top: auto;
}
.projekt-link:hover { opacity: 0.5; }

/* ═══════════════════════════════════════
   ERFAHRUNG
═══════════════════════════════════════ */
.erfahrung-list {
  display: flex;
  flex-direction: column;
  list-style: none;
}
.erfahrung-item {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}
.erfahrung-item:last-child { border-bottom: 1px solid var(--border); }

.erfahrung-meta {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding-top: 0.1rem;
}
.erfahrung-zeit {
  font-size: var(--fs-xs);
  color: var(--muted);
  letter-spacing: 0.02em;
}
.erfahrung-tag {
  display: inline-block;
  font-size: 0.68rem;
  padding: 0.2rem 0.5rem;
  border: 1px solid var(--border-mid);
  letter-spacing: 0.07em;
  text-transform: uppercase;
  width: fit-content;
  border-radius: 2px;
}
.erfahrung-body h3 {
  font-size: var(--fs-h3);
  font-weight: 500;
  margin-bottom: 0.2rem;
}
.erfahrung-firma {
  font-size: var(--fs-xs);
  color: var(--muted);
  margin-bottom: 0.6rem;
  letter-spacing: 0.02em;
}
.erfahrung-desc {
  font-size: var(--fs-sm);
  color: var(--muted);
  font-weight: 300;
}

/* ═══════════════════════════════════════
   ÜBER
═══════════════════════════════════════ */
.über-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.über-text {
  font-size: var(--fs-md);
  color: var(--muted);
  font-weight: 300;
  margin-bottom: 1rem;
}
.über-text-block .btn { margin-top: 1.25rem; }

.skills-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.skill-item {
  background: var(--bg-alt);
  padding: 0.85rem 1rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: background var(--ease);
}
[data-theme="dark"] .skill-item { background: var(--bg-alt); }

/* ═══════════════════════════════════════
   KONTAKT
═══════════════════════════════════════ */
.kontakt-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}
.kontakt-intro p {
  font-size: var(--fs-lg);
  color: var(--muted);
  font-weight: 300;
  margin-bottom: 2rem;
  line-height: 1.6;
}
.kontakt-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}
.form-group label {
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
}
.form-group input,
.form-group textarea {
  font-family: var(--sans);
  font-size: var(--fs-sm);
  background: transparent;
  border: 1px solid var(--border-mid);
  color: var(--text);
  padding: 0.75rem 1rem;
  outline: none;
  width: 100%;
  transition: border-color var(--ease);
  border-radius: 2px;
  resize: none;
  -webkit-appearance: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--muted); opacity: 0.6; }
.form-group input:focus,
.form-group textarea:focus { border-color: var(--text); }

.form-submit {
  display: inline-block;
  padding: 0.75rem 1.6rem;
  border: 1px solid var(--text);
  font-family: var(--sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--text);
  background: transparent;
  transition: background var(--ease), color var(--ease);
  align-self: flex-start;
  border-radius: 0;
}
.form-submit:hover { background: var(--text); color: var(--bg); }
.form-submit:focus-visible { outline: 2px solid var(--text); outline-offset: 3px; }

/* ═══════════════════════════════════════
   FOOTER
═══════════════════════════════════════ */
.footer {
  padding: 1.5rem var(--pad);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--fs-xs);
  color: var(--muted);
  border-top: 1px solid var(--border);
  letter-spacing: 0.04em;
}

/* ═══════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════ */
@media (max-width: 900px) {
  .projekte-grid     { grid-template-columns: 1fr; }
  .kontakt-grid      { grid-template-columns: 1fr; gap: 2.5rem; }
  .über-grid         { grid-template-columns: 1fr; gap: 2rem; }
  .erfahrung-item    { grid-template-columns: 1fr; gap: 0.35rem; }
  .hero-line         { display: none; }
}

@media (max-width: 768px) {
  .nav-center        { display: none; }
  .nav-hamburger     { display: flex; }

  .section, .section--alt { padding: 4rem var(--pad); }
  .section-title { margin-bottom: 2rem; }
}

@media (max-width: 480px) {
  .skills-list { grid-template-columns: 1fr; }
}