/* ============================================================
   BB Buildings Berlin GmbH — www.buildingsberlin.de
   Corporate Design abgeleitet aus der offiziellen Exposé-Maske
   Farben: BB-Teal #1D7FA4 · Petrol #16607D · Dunkelblau #1F3864
   ============================================================ */

/* ---------- Selbst gehostete Schriften (DSGVO-konform) ---------- */
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../assets/fonts/oswald-latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('../assets/fonts/oswald-latin-500-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Oswald';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../assets/fonts/oswald-latin-600-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('../assets/fonts/source-sans-3-latin-400-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('../assets/fonts/source-sans-3-latin-600-normal.woff2') format('woff2');
}
@font-face {
  font-family: 'Source Sans 3';
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url('../assets/fonts/source-sans-3-latin-700-normal.woff2') format('woff2');
}

:root {
  --teal:        #1D7FA4;
  --teal-dark:   #16607D;
  --teal-deep:   #0F4B63;
  --navy:        #1F3864;
  --ice:         #EAF2F6;
  --row:         #D5E8F0;
  --ink:         #2B3A45;
  --ink-soft:    #5A6B76;
  --line:        #D8E2E8;
  --white:       #FFFFFF;
  --maxw: 1140px;
  --font-display: 'Oswald', 'Arial Narrow', Arial, sans-serif;
  --font-body: 'Source Sans 3', 'Segoe UI', Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}

body {
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
}

img { max-width: 100%; display: block; }
a { color: var(--teal-dark); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 84px;
}
.brand { display: flex; align-items: center; gap: 14px; text-decoration: none; }
.brand img { height: 62px; width: auto; }

.main-nav { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: .95rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--navy);
  padding: 10px 14px;
}
.main-nav a:hover { color: var(--teal); }
.main-nav a.nav-cta {
  background: var(--teal);
  color: var(--white);
  margin-left: 8px;
}
.main-nav a.nav-cta:hover { background: var(--teal-dark); color: var(--white); }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--line);
  padding: 10px 12px; cursor: pointer;
  font-family: var(--font-display); letter-spacing: .1em;
  text-transform: uppercase; font-size: .85rem; color: var(--navy);
}

/* ---------- Hero: Architekturfoto + Exposé-Band ---------- */
.hero {
  position: relative;
  min-height: 680px;
  background: var(--ice) url('../assets/img/hero.jpg') center 30% / cover no-repeat;
  display: flex;
  align-items: center;
}
.hero-band {
  width: 100%;
  background: var(--teal);
  color: var(--white);
  padding: 56px 0;
  margin-top: 220px;
}
.hero-band .eyebrow {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: .32em;
  text-transform: uppercase;
  font-size: .9rem;
  color: #CFE6F0;
  margin-bottom: 10px;
}
.hero-band h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  line-height: 1.15;
  letter-spacing: .04em;
  text-transform: uppercase;
  max-width: 18ch;
}
.hero-band p.sub {
  margin-top: 14px;
  max-width: 56ch;
  font-size: 1.15rem;
  color: #E6F2F7;
}
.hero-actions { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }

.btn {
  display: inline-block;
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: .16em;
  text-transform: uppercase;
  font-size: .95rem;
  text-decoration: none;
  padding: 14px 28px;
  border: 2px solid transparent;
  cursor: pointer;
}
.btn-light { background: var(--white); color: var(--teal-deep); }
.btn-light:hover { background: var(--ice); }
.btn-ghost { border-color: var(--white); color: var(--white); }
.btn-ghost:hover { background: rgba(255,255,255,.12); }
.btn-teal { background: var(--teal); color: var(--white); border: none; }
.btn-teal:hover { background: var(--teal-dark); }

/* ---------- Abschnitte ---------- */
.section { padding: 88px 0; }
.section.tinted { background: var(--ice); }

.kicker {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: .3em;
  text-transform: uppercase;
  font-size: .85rem;
  color: var(--teal);
  margin-bottom: 8px;
}
h2 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--navy);
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 22px;
}
h3 {
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--navy);
  font-size: 1.2rem;
  margin-bottom: 10px;
}
.lead { font-size: 1.18rem; max-width: 70ch; }

/* Über uns: Text + Foto */
.split { display: grid; grid-template-columns: 7fr 5fr; gap: 56px; align-items: center; }
.split .photo {
  position: relative;
}
.split .photo img {
  width: 100%; height: 460px; object-fit: cover; object-position: 72% 65%;
  border: 1px solid var(--line);
}

.split p + p { margin-top: 14px; }

/* Leistungen */
.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 36px;
}
.card {
  background: var(--white);
  border: 1px solid var(--line);
  padding: 30px 26px 34px;
}
.card .num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  color: var(--teal);
  letter-spacing: .2em;
  display: block;
  margin-bottom: 16px;
}
.card p { font-size: .98rem; color: var(--ink-soft); }

/* Eckdaten-Tabelle (Zitat der Exposé-Maske) */
.eckdaten { margin-top: 32px; border-top: none; width: 100%; border-collapse: collapse; }
.eckdaten caption {
  text-align: left;
  background: var(--teal);
  color: var(--white);
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: 12px 18px;
  font-size: 1rem;
}
.eckdaten th, .eckdaten td {
  text-align: left;
  padding: 12px 18px;
  font-size: 1rem;
  vertical-align: top;
}
.eckdaten tr:nth-child(odd) { background: var(--row); }
.eckdaten th { font-weight: 700; color: var(--navy); width: 34%; }

/* Vermittlungs-Band */
.band {
  background: var(--teal-dark);
  color: var(--white);
  padding: 72px 0;
}
.band h2 { color: var(--white); }
.band p { max-width: 75ch; color: #DCEEF5; }
.band .btn { margin-top: 26px; }

/* ---------- Kontakt ---------- */
.contact-grid { display: grid; grid-template-columns: 5fr 7fr; gap: 56px; margin-top: 36px; }
.contact-list { list-style: none; }
.contact-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.contact-list .label {
  font-family: var(--font-display);
  font-size: .82rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--teal);
  display: block;
}
.contact-list a { color: var(--ink); text-decoration: none; }
.contact-list a:hover { color: var(--teal); }

form .field { margin-bottom: 18px; }
form label {
  display: block;
  font-family: var(--font-display);
  font-size: .85rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--navy);
  margin-bottom: 6px;
}
form input[type="text"],
form input[type="email"],
form input[type="tel"],
form textarea {
  width: 100%;
  font: inherit;
  padding: 12px 14px;
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink);
}
form textarea { min-height: 150px; resize: vertical; }
.consent { display: flex; gap: 10px; align-items: flex-start; font-size: .95rem; color: var(--ink-soft); }
.consent input { margin-top: 5px; }
.hp-field { position: absolute; left: -9999px; height: 0; overflow: hidden; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--teal-deep);
  color: #CFE2EC;
  padding: 56px 0 28px;
  font-size: .95rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.site-footer img { height: 110px; width: auto; margin-bottom: 14px; }
.site-footer h4 {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: .2em;
  text-transform: uppercase;
  font-size: .85rem;
  color: var(--white);
  margin-bottom: 12px;
}
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 8px; }
.site-footer a { color: #CFE2EC; text-decoration: none; }
.site-footer a:hover { color: var(--white); text-decoration: underline; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.18);
  margin-top: 44px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- Unterseiten (Rechtstexte) ---------- */
.page-head {
  background: var(--ice) url('../assets/img/hero.jpg') center 25% / cover no-repeat;
}
.page-head .hero-band { margin-top: 64px; padding: 38px 0; }
.page-head h1 {
  font-family: var(--font-display);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
}
.legal { padding: 72px 0 96px; }
.legal .container { max-width: 860px; }
.legal h2 { font-size: 1.35rem; margin: 40px 0 12px; }
.legal h3 { margin-top: 26px; }
.legal p, .legal li { margin-bottom: 12px; }
.legal ul, .legal ol { padding-left: 22px; margin-bottom: 14px; }
.legal .note {
  background: var(--row);
  padding: 16px 18px;
  font-size: .95rem;
  margin: 24px 0;
}

/* ---------- Responsiv ---------- */
@media (max-width: 980px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .split, .contact-grid { grid-template-columns: 1fr; gap: 36px; }
  .split .photo img { height: 340px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 84px; left: 0; right: 0;
    background: var(--white);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 12px 24px 20px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; }
  .main-nav a.nav-cta { margin-left: 0; text-align: center; }
  .hero { min-height: 480px; }
  .hero-band { margin-top: 150px; padding: 40px 0; }
  .section { padding: 64px 0; }
  .cards { grid-template-columns: 1fr; }
  .eckdaten th { width: 42%; }
}