/* ============================================================
   BJÖRN BURK – Apple-style redesign
   ============================================================ */

:root {
  --bg:        #ffffff;
  --bg-alt:    #f5f5f7;
  --text:      #1d1d1f;
  --secondary: #6e6e73;
  --tertiary:  #aeaeb2;
  --navy:      #0d1117;
  --accent:    #2e7fd4;
  --border:    #d2d2d7;
  --radius:    18px;
  --transition: .3s cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, 'Helvetica Neue', sans-serif;
  font-size: 17px;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Typography ────────────────────────────────────────────── */
h1 {
  font-size: clamp(2.6rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
h2 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.025em;
}
h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}
p { max-width: 60ch; }

a { color: inherit; text-decoration: none; }

/* ── Layout ────────────────────────────────────────────────── */
.container {
  width: min(980px, 90%);
  margin-inline: auto;
}

section { padding-block: 120px; }

.section-eyebrow {
  display: block;
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: .75rem;
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding: .7rem 1.6rem;
  border-radius: 980px;
  font-size: .9rem;
  font-weight: 500;
  letter-spacing: -.01em;
  cursor: pointer;
  border: 1px solid transparent;
  transition: opacity var(--transition), background var(--transition);
}
.btn:hover { opacity: .8; }

.btn-primary  { background: var(--accent); color: #fff; }
.btn-outline  { border-color: rgba(255,255,255,.45); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.08); opacity: 1; }
.btn-ghost    { border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--bg-alt); opacity: 1; }

/* ── NAV ───────────────────────────────────────────────────── */
#site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  transition: background var(--transition);
}

#site-header.scrolled {
  background: rgba(13,17,23,.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255,255,255,.06);
}

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

.logo { color: #fff; line-height: 1; }
.logo-name { font-size: 1.05rem; font-weight: 600; letter-spacing: -.02em; display: block; }
.logo-sub  { font-size: .62rem; font-weight: 400; letter-spacing: .1em; text-transform: uppercase; opacity: .5; display: block; margin-top: .2rem; }

nav ul { display: flex; gap: 2rem; list-style: none; }
nav a  { color: rgba(255,255,255,.75); font-size: .85rem; font-weight: 400; transition: color var(--transition); }
nav a:hover, nav a.active { color: #fff; }

.nav-cta { margin-left: 1rem; padding: .55rem 1.2rem; font-size: .85rem; }

.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: .35rem; }
.hamburger span { display: block; width: 20px; height: 1.5px; background: #fff; transition: var(--transition); }
.hamburger.open span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ── HERO ──────────────────────────────────────────────────── */
#hero {
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  background:
    linear-gradient(to top, rgba(13,17,23,1) 0%, rgba(13,17,23,.55) 50%, rgba(13,17,23,.3) 100%),
    url('assets/images/BB.jpeg') center 20%/cover no-repeat;
}

.hero-shapes { display: none; }

.hero-content {
  padding-block: 80px 72px;
  max-width: 720px;
}

.hero-eyebrow {
  font-size: .78rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 1.5rem;
  opacity: .9;
}

#hero h1 { color: #fff; margin-bottom: 1.25rem; }

#hero h1 em {
  font-style: normal;
  color: rgba(255,255,255,.55);
}

.hero-text {
  font-size: 1.1rem;
  color: rgba(255,255,255,.62);
  max-width: 52ch;
  margin-bottom: 2rem;
  line-height: 1.65;
}

.hero-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-bottom: 3.5rem; }

.hero-stats {
  display: flex;
  gap: 2.5rem;
  flex-wrap: wrap;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,.1);
}

.stat-number { display: block; font-size: 2rem; font-weight: 700; color: #fff; letter-spacing: -.04em; line-height: 1; }
.stat-label  { display: block; font-size: .72rem; color: rgba(255,255,255,.42); text-transform: uppercase; letter-spacing: .1em; margin-top: .3rem; }

/* ── LEISTUNGEN ────────────────────────────────────────────── */
#leistungen { background: var(--bg-alt); }

.section-header {
  max-width: 600px;
  margin: 0 auto 4rem;
  text-align: center;
}
.section-header h2 { color: var(--text); margin-bottom: .75rem; }
.section-header p  { color: var(--secondary); font-size: 1rem; margin: 0 auto; }

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.card {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  display: flex;
  flex-direction: column;
  gap: .9rem;
}

.card-icon {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--navy);
  border-radius: 10px;
  flex-shrink: 0;
}
.card-icon svg { width: 20px; height: 20px; fill: none; stroke: #fff; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }

.card h3 { color: var(--text); }

.card > p { color: var(--secondary); font-size: .9rem; flex: 1; }

.card-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding-top: .75rem;
  border-top: 1px solid var(--bg-alt);
}
.card-list li {
  font-size: .82rem;
  color: var(--secondary);
  display: flex;
  gap: .5rem;
  align-items: flex-start;
}
.card-list li::before { content: '·'; color: var(--accent); font-weight: 700; flex-shrink: 0; }

/* ── VORGEHEN ──────────────────────────────────────────────── */
#vorgehen { background: var(--bg); }

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 3rem;
}

.process-step {}

.step-number {
  font-size: 3rem;
  font-weight: 700;
  color: var(--bg-alt);
  letter-spacing: -.04em;
  line-height: 1;
  margin-bottom: 1.25rem;
  display: block;
}

.step-title { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: .4rem; }
.step-desc  { font-size: .85rem; color: var(--secondary); line-height: 1.55; }

/* ── ÜBER MICH ─────────────────────────────────────────────── */
#ueber-mich { background: var(--navy); padding-block: 120px; }

.about-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 6rem;
  align-items: center;
}

.about-image-wrap { position: relative; }

.about-image {
  width: 100%;
  aspect-ratio: 3/4;
  border-radius: var(--radius);
  object-fit: cover;
  object-position: center top;
  display: block;
}

.about-badge { display: none; }

.about-content .section-eyebrow { color: var(--accent); }

.about-content h2 {
  color: #fff;
  margin-bottom: 1.5rem;
}

.about-text {
  color: rgba(255,255,255,.6);
  font-size: .97rem;
  margin-bottom: 1.25rem;
  max-width: 52ch;
}

.about-features {
  display: flex;
  flex-direction: column;
  margin-top: 2rem;
  margin-bottom: 2.5rem;
  border-top: 1px solid rgba(255,255,255,.08);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: .75rem;
  color: rgba(255,255,255,.65);
  font-size: .9rem;
  padding: .85rem 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  line-height: 1.5;
}
.feature-icon { flex-shrink: 0; }

/* ── WARUM ─────────────────────────────────────────────────── */
#warum { background: var(--bg-alt); }

.usps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
}

.usp-card { padding: 0; background: none; border: none; }
.usp-icon { font-size: 1.4rem; display: block; margin-bottom: .9rem; }
.usp-card h3 { font-size: .97rem; color: var(--text); margin-bottom: .4rem; }
.usp-card p  { font-size: .85rem; color: var(--secondary); line-height: 1.55; max-width: 100%; }

/* ── KONTAKT ───────────────────────────────────────────────── */
#kontakt { background: var(--bg); }

.kontakt-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 6rem;
  align-items: start;
}

.kontakt-info h2 { color: var(--text); margin-bottom: 1rem; }
.kontakt-text { color: var(--secondary); font-size: .97rem; margin-bottom: 2.5rem; max-width: 40ch; }

.contact-items { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-item { display: flex; gap: .75rem; align-items: flex-start; }
.contact-item-icon { font-size: .9rem; margin-top: .1rem; flex-shrink: 0; }
.contact-item-body { display: flex; flex-direction: column; gap: .1rem; }
.contact-item-label { font-size: .72rem; text-transform: uppercase; letter-spacing: .1em; color: var(--tertiary); font-weight: 600; }
.contact-item-value { font-size: .92rem; color: var(--text); }
.contact-item-value a { color: var(--text); }
.contact-item-value a:hover { color: var(--secondary); }

.form-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 2rem;
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .85rem;
}

.form-group { display: flex; flex-direction: column; gap: .3rem; }
.form-group.full { grid-column: 1 / -1; }

label { font-size: .78rem; font-weight: 600; color: var(--secondary); text-transform: uppercase; letter-spacing: .08em; }

input, select, textarea {
  width: 100%;
  padding: .7rem .9rem;
  border: 1px solid transparent;
  border-radius: 10px;
  font-size: .92rem;
  font-family: inherit;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color var(--transition);
  -webkit-appearance: none;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--secondary);
}
textarea { resize: vertical; min-height: 110px; }

.form-submit {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: .25rem;
}

.privacy-note { font-size: .75rem; color: var(--tertiary); }
.privacy-note a { color: var(--secondary); text-decoration: underline; text-underline-offset: 2px; }

.alert { padding: .8rem 1rem; border-radius: 10px; font-size: .88rem; grid-column: 1 / -1; }
.alert-success { background: #f0faf3; color: #1a6630; }
.alert-error   { background: #fdf3f3; color: #8b2020; }

/* ── FOOTER ────────────────────────────────────────────────── */
#site-footer {
  background: var(--navy);
  padding-block: 52px 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 2.5rem;
  margin-bottom: 2.5rem;
  border-bottom: 1px solid rgba(255,255,255,.07);
}

.footer-brand .logo { margin-bottom: .9rem; }
.footer-brand p { font-size: .82rem; color: rgba(255,255,255,.4); max-width: 28ch; line-height: 1.6; }

.footer-col h4 { font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .12em; color: rgba(255,255,255,.7); margin-bottom: 1rem; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: .5rem; }
.footer-links a { font-size: .82rem; color: rgba(255,255,255,.38); transition: color var(--transition); }
.footer-links a:hover { color: rgba(255,255,255,.72); }

.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 1rem; }
.footer-bottom p { font-size: .78rem; color: rgba(255,255,255,.3); }
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a { font-size: .78rem; color: rgba(255,255,255,.3); transition: color var(--transition); }
.footer-legal a:hover { color: rgba(255,255,255,.6); }

/* ── REVEAL ────────────────────────────────────────────────── */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .07s; }
.reveal-delay-2 { transition-delay: .14s; }
.reveal-delay-3 { transition-delay: .21s; }

/* ── RESPONSIVE ────────────────────────────────────────────── */
@media (max-width: 1024px) {
  .cards-grid   { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .usps-grid    { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  section { padding-block: 80px; }

  .about-grid   { grid-template-columns: 1fr; gap: 3rem; }
  .about-image  { aspect-ratio: 1; object-position: center 15%; }
  .kontakt-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-grid  { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }

  nav ul, .nav-cta { display: none; }
  .hamburger { display: flex; }

  nav.open ul {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px; left: 0; right: 0;
    background: rgba(13,17,23,.96);
    backdrop-filter: blur(20px);
    padding: 1.25rem 5%;
    gap: 1rem;
    border-top: 1px solid rgba(255,255,255,.07);
  }
}

@media (max-width: 600px) {
  h1 { font-size: 2.4rem; }
  h2 { font-size: 1.8rem; }
  .form-grid   { grid-template-columns: 1fr; }
  .hero-stats  { gap: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .usps-grid   { grid-template-columns: 1fr; }
  .cards-grid  { grid-template-columns: 1fr; }
}