/*
Theme Name: D4 Bau
Theme URI: https://d4-bau.de
Author: D4 Bau GmbH
Description: Ein-Seiten-Infoauftritt für die D4 Bau GmbH — Gerüstbau, Ausbau und Baureinigung in Ludwigsfelde und der Region Berlin-Brandenburg. Keine Formulare, kein Tracking, selbst gehostete Schriften.
Version: 1.0.0
Requires at least: 6.4
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: https://www.gnu.org/licenses/gpl-2.0.html
Text Domain: d4-bau
*/

/* ==========================================================================
   Tokens
   ========================================================================== */

:root {
  --color-bg: #EDEBE4;
  --color-bg-deep: #E2DFD5;
  --color-paper: #FAF9F6;
  --color-ink: #1C1B19;
  --color-ink-soft: #4A4843;
  --color-steel: #1F3A4D;
  --color-steel-light: #2E5570;
  --color-accent: #E2571E;
  --color-line: #B9B3A4;
  --color-line-strong: #8C8577;

  --font-display: 'Archivo Black', 'Arial Black', sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --wrap: 1180px;
  --gutter: clamp(20px, 5vw, 64px);

  --radius: 2px;
}

/* ==========================================================================
   Fonts — selbst gehostet, kein CDN
   ========================================================================== */

@font-face {
  font-family: 'Archivo Black';
  src: url('fonts/archivo-black-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('fonts/inter-400.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Inter';
  src: url('fonts/inter-600.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ==========================================================================
   Reset & Grundlagen
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }

a { color: inherit; }

h1, h2, h3 { margin: 0; font-family: var(--font-display); font-weight: 400; }

p { margin: 0; }

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

.eyebrow {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
}

/* Blueprint-Eckmarken — wiederkehrendes Motiv, kein Dekor ohne Bezug:
   technische Zeichnungen tragen genau solche Passermarken an den Ecken. */
.corner-marks {
  position: relative;
}
.corner-marks::before,
.corner-marks::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  pointer-events: none;
}
.corner-marks::before {
  top: 0;
  left: var(--gutter);
  border-top: 2px solid var(--color-line-strong);
  border-left: 2px solid var(--color-line-strong);
}
.corner-marks::after {
  bottom: 0;
  right: var(--gutter);
  border-bottom: 2px solid var(--color-line-strong);
  border-right: 2px solid var(--color-line-strong);
}

/* ==========================================================================
   Kopfzeile
   ========================================================================== */

.site-header {
  border-bottom: 1px solid var(--color-line);
  padding: 18px 0;
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.brand-logo {
  height: 34px;
  width: auto;
}

.header-contact {
  display: flex;
  gap: 24px;
  font-size: 14px;
  font-weight: 600;
}

.header-contact a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
.header-contact a:hover { border-color: currentColor; }

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
  position: relative;
  padding: clamp(48px, 8vw, 96px) 0 clamp(56px, 9vw, 110px);
  overflow: hidden;
  background-image:
    linear-gradient(var(--color-bg) 0, var(--color-bg) 100%),
    repeating-linear-gradient(0deg, rgba(31,58,77,0.08) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(31,58,77,0.08) 0 1px, transparent 1px 48px);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  width: 100%;
  height: 6px;
  border: 0;
  background: repeating-linear-gradient(45deg, var(--color-accent) 0 14px, var(--color-steel) 14px 28px);
}

.hero::after {
  content: 'D4';
  position: absolute;
  right: clamp(-40px, -2vw, 10px);
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(220px, 30vw, 480px);
  line-height: 1;
  color: var(--color-steel);
  opacity: 0.05;
  pointer-events: none;
  z-index: 0;
}

.hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(32px, 6vw, 56px);
  align-items: center;
}

.hero-text h1 {
  font-size: clamp(38px, 6.4vw, 78px);
  line-height: 1.02;
  margin: 14px 0 26px;
  letter-spacing: -0.015em;
}

.hero-text h1 .accent-word {
  color: var(--color-ink);
  background-image: linear-gradient(var(--color-accent), var(--color-accent));
  background-repeat: no-repeat;
  background-size: 100% 0.26em;
  background-position: 0 90%;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.hero-lede {
  font-size: 18px;
  color: var(--color-ink-soft);
  max-width: 46ch;
  margin-bottom: 30px;
}

.hero-meta {
  display: flex;
  gap: 10px;
  align-items: baseline;
  font-size: 14px;
  color: var(--color-ink-soft);
  margin-bottom: 32px;
}
.hero-meta strong { color: var(--color-ink); font-weight: 600; }

.cta-row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 22px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: transform 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-paper);
}
.btn-primary:hover { transform: translateY(-1px); background: #c94c19; }

.btn-secondary {
  background: transparent;
  color: var(--color-steel);
  border-color: var(--color-steel);
}
.btn-secondary:hover { background: var(--color-steel); color: var(--color-paper); }

.hero-art {
  width: 100%;
}

.hero-art svg { width: 100%; height: auto; }

/* Signatur-Zeichnung: Striche zeichnen sich beim Laden einmalig nach —
   ein orchestrierter Moment statt verstreuter Effekte. */
.hero-art .draw-line {
  stroke-dasharray: var(--len, 1200);
  stroke-dashoffset: var(--len, 1200);
  animation: draw 1.6s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes draw { to { stroke-dashoffset: 0; } }

.hero-art .fade-in {
  opacity: 0;
  animation: fade-in 0.6s ease forwards;
  animation-delay: var(--delay, 0s);
}
@keyframes fade-in { to { opacity: 1; } }

@media (prefers-reduced-motion: reduce) {
  .hero-art .draw-line { animation: none; stroke-dashoffset: 0; }
  .hero-art .fade-in { animation: none; opacity: 1; }
}

/* ==========================================================================
   Leistungen
   ========================================================================== */

.leistungen {
  padding: clamp(56px, 8vw, 100px) 0;
  border-top: 1px solid var(--color-line);
}

.section-head {
  max-width: 62ch;
  margin-bottom: clamp(32px, 5vw, 52px);
}

.section-head h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  margin-top: 10px;
  letter-spacing: -0.01em;
}

.section-head p {
  margin-top: 14px;
  color: var(--color-ink-soft);
  font-size: 16px;
}

.leistungen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.leistung {
  position: relative;
  overflow: hidden;
  padding: 28px clamp(18px, 2.4vw, 30px);
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
  background: var(--color-paper);
  transition: background-color 0.25s ease, color 0.25s ease;
}

.leistung::before {
  content: attr(data-num);
  position: absolute;
  top: -0.12em;
  right: 0.06em;
  font-family: var(--font-display);
  font-size: clamp(70px, 8vw, 110px);
  line-height: 1;
  color: var(--color-ink);
  opacity: 0.05;
  pointer-events: none;
  transition: opacity 0.25s ease, color 0.25s ease;
}

.leistung:hover {
  background: var(--color-steel);
  color: var(--color-paper);
}

.leistung:hover::before {
  color: var(--color-paper);
  opacity: 0.09;
}

.leistung-num {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.06em;
}

.leistung:hover .leistung-num { color: #F0A98C; }

.leistung h3 {
  position: relative;
  z-index: 1;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 17px;
  margin: 10px 0 8px;
  line-height: 1.3;
}

.leistung p {
  position: relative;
  z-index: 1;
  font-size: 14.5px;
  color: var(--color-ink-soft);
  transition: color 0.25s ease;
}

.leistung:hover p { color: #D7E0E6; }

.js-reveal .leistung,
.js-reveal .warum-item,
.js-reveal .einblicke-item {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.js-reveal .leistung.is-visible,
.js-reveal .warum-item.is-visible,
.js-reveal .einblicke-item.is-visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================================
   Einblicke — echte Baustellenfotos, mit Stahl-/Akzentfarbe abgetönt, damit
   sie nicht wie ein Fremdkörper neben der technischen Zeichnung wirken.
   ========================================================================== */

.einblicke {
  padding: clamp(56px, 8vw, 100px) 0;
  border-top: 1px solid var(--color-line);
}

.einblicke-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--color-line);
  border-left: 1px solid var(--color-line);
}

.einblicke-item {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  border-right: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.einblicke-item img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(0.25) contrast(1.05);
  transition: filter 0.5s ease, transform 0.6s ease;
}

.einblicke-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(155deg, rgba(31,58,77,0.6), rgba(226,87,30,0.22));
  mix-blend-mode: multiply;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

.einblicke-item:hover img,
.einblicke-item:focus-within img {
  transform: scale(1.045);
  filter: grayscale(0) contrast(1);
}

.einblicke-item:hover::after,
.einblicke-item:focus-within::after {
  opacity: 0;
}

.einblicke-caption {
  position: absolute;
  z-index: 1;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 16px 18px;
  color: var(--color-paper);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: 0.02em;
  background: linear-gradient(0deg, rgba(28,27,25,0.65) 0%, transparent 100%);
}

/* ==========================================================================
   Warum D4 Bau
   ========================================================================== */

.warum {
  padding: clamp(48px, 7vw, 84px) 0;
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-deep);
}

.warum-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(28px, 4vw, 48px);
  margin-top: 8px;
}

.warum-item {
  border-left: 2px solid var(--color-steel);
  padding-left: 18px;
}

.warum-item h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 17px;
  margin-bottom: 8px;
}

.warum-item p {
  font-size: 15px;
  color: var(--color-ink-soft);
}

/* ==========================================================================
   Kontakt
   ========================================================================== */

.kontakt {
  position: relative;
  background: var(--color-steel);
  color: var(--color-paper);
  padding: clamp(52px, 8vw, 96px) 0;
}

.kontakt::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  width: 100%;
  height: 6px;
  border: 0;
  background: repeating-linear-gradient(45deg, var(--color-accent) 0 14px, var(--color-steel-light) 14px 28px);
}

.kontakt .eyebrow { color: #F0A98C; }

.kontakt h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  margin-top: 10px;
  color: var(--color-paper);
}

.kontakt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(32px, 5vw, 52px);
}

.kontakt-item {
  border-top: 1px solid rgba(250,249,246,0.25);
  padding-top: 18px;
}

.kontakt-item span {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #A9C0CE;
  margin-bottom: 10px;
}

.kontakt-item a,
.kontakt-item address {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 19px;
  font-style: normal;
  text-decoration: none;
  line-height: 1.4;
}

.kontakt-item a {
  border-bottom: 1px solid transparent;
  transition: border-color 0.15s ease;
}
.kontakt-item a:hover { border-color: currentColor; }

/* ==========================================================================
   Fußzeile
   ========================================================================== */

.site-footer {
  padding: 26px 0;
  font-size: 13px;
  color: var(--color-ink-soft);
}

.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a { text-decoration: none; }
.footer-links a:hover { text-decoration: underline; }

/* ==========================================================================
   Rechtsseiten (Impressum, Datenschutz)
   ========================================================================== */

.legal-page {
  padding: clamp(48px, 7vw, 84px) 0 clamp(64px, 9vw, 110px);
}

.legal-page .wrap { max-width: 760px; }

.legal-page h1 {
  font-size: clamp(30px, 4vw, 44px);
  margin-bottom: 8px;
  overflow-wrap: break-word;
}

.legal-page .eyebrow { display: block; margin-bottom: 12px; }

.legal-page .legal-body {
  margin-top: 36px;
  font-size: 16px;
}

.legal-body h2 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 20px;
  margin: 2.4em 0 0.6em;
}

.legal-body h2:first-child { margin-top: 0; }

.legal-body p { margin: 0 0 1em; color: var(--color-ink-soft); }
.legal-body ul { margin: 0 0 1em; padding-left: 1.2em; color: var(--color-ink-soft); }
.legal-body li { margin-bottom: 0.4em; }
.legal-body strong { color: var(--color-ink); }
.legal-body a { color: var(--color-steel); }

.back-link {
  display: inline-block;
  margin-bottom: 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-steel);
  text-decoration: none;
}
.back-link:hover { text-decoration: underline; }

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 900px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero-art { order: -1; max-width: 420px; margin: 0 auto; }
  .leistungen-grid { grid-template-columns: repeat(2, 1fr); }
  .einblicke-grid { grid-template-columns: repeat(2, 1fr); }
  .warum-grid { grid-template-columns: 1fr; gap: 24px; }
  .kontakt-grid { grid-template-columns: 1fr; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .leistungen-grid { grid-template-columns: 1fr; }
  .einblicke-grid { grid-template-columns: 1fr; }
  .einblicke-item { aspect-ratio: 16 / 11; }
  .header-contact { display: none; }
  .site-header .wrap { justify-content: center; }
  .cta-row { flex-direction: column; }
  .btn { justify-content: center; }
}