/* ============================================================
   bausinn plus — Stylesheet
   Farbpalette aus dem Firmen-Branding abgeleitet
   ============================================================ */

/* ============ FONTS (lokal eingebunden) ============ */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url("../fonts/Inter-Variable.woff2") format("woff2");
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url("../fonts/SpaceGrotesk-Variable.woff2") format("woff2");
}

:root {
  /* Farben */
  --color-primary: #3F5E75;        /* dunkles Petrol/Navy – Logo, Skyline */
  --color-primary-dark: #2C4759;
  --color-secondary: #2A637E;      /* Petrolblau – Banner, Buttons */
  --color-secondary-dark: #1E4B60;
  --color-accent: #864433;         /* Terrakotta – Icon-Akzent */
  --color-accent-alt: #ABAD3C;     /* Oliv-Gold – Links/Hover */
  --color-skyline-light: #CDDBE4;  /* helles Blaugrau – Skyline Hintergrund */
  --color-muted: #9EB0BD;          /* gedämpftes Blaugrau – Sekundärtext */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F4F7F9;
  --color-text: #22303A;
  --color-white: #FFFFFF;
  --color-border: #E1E8EC;

  /* Typografie */
  --font-base: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-heading: "Space Grotesk", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --fs-base: 1rem;

  /* Layout */
  --container-width: 1160px;
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 10px rgba(34, 48, 58, 0.06);
  --shadow-md: 0 12px 32px rgba(34, 48, 58, 0.12);

  /* Transitions */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition-base: 0.35s var(--ease);

  --header-height: 84px;
}

/* ============ RESET ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

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

body, h1, h2, h3, p, ul, figure, address {
  margin: 0;
}
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, textarea { font: inherit; }

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4,
.logo__text,
.hero__title, .hero__eyebrow,
.section__title, .section__eyebrow,
.card__title, .project__title,
.btn {
  font-family: var(--font-heading);
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 24px;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 12px 20px;
  z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* ============ HEADER ============ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  z-index: 100;
  background: rgba(255, 255, 255, 0.0);
  transition: background var(--transition-base), box-shadow var(--transition-base), height var(--transition-base);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  box-shadow: var(--shadow-sm);
  height: 68px;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.logo__text {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.logo__text--accent { color: var(--color-accent); font-weight: 400; }

.nav__list {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav__link {
  display: inline-block;
  padding: 10px 16px;
  border-radius: 999px;
  font-weight: 500;
  color: var(--color-text);
  transition: background var(--transition-base), color var(--transition-base);
}
.nav__link:hover,
.nav__link:focus-visible {
  background: var(--color-bg-alt);
  color: var(--color-secondary);
}
.nav__link--cta {
  background: var(--color-secondary);
  color: var(--color-white);
}
.nav__link--cta:hover,
.nav__link--cta:focus-visible {
  background: var(--color-secondary-dark);
  color: var(--color-white);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  padding: 10px;
  z-index: 110;
}
.burger__line {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.burger[aria-expanded="true"] .burger__line:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] .burger__line:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] .burger__line:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  border: 2px solid transparent;
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.btn--primary {
  background: var(--color-secondary);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--color-secondary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn--ghost {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}
.btn--small { padding: 10px 20px; font-size: 0.9rem; }
.btn--large { padding: 18px 36px; font-size: 1.05rem; }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-height);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(171, 173, 60, 0.10), transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(134, 68, 51, 0.10), transparent 45%),
    linear-gradient(160deg, #FFFFFF 0%, var(--color-bg-alt) 55%, var(--color-skyline-light) 100%);
  z-index: -2;
}
.hero__inner {
  padding-top: 60px;
  padding-bottom: 220px;
  display: grid;
  grid-template-columns: minmax(0, 560px) minmax(0, 1fr);
  align-items: center;
  gap: 64px;
}
.hero__content { max-width: 560px; }
.hero__visual {
  position: relative;
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}
.hero__visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(42, 99, 126, 0.22), transparent 55%);
}
.hero__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 18px;
}
.hero__title {
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.08;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.hero__title--accent { color: var(--color-secondary); }
.hero__subtitle {
  font-size: 1.15rem;
  color: var(--color-text);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__skyline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  z-index: -1;
  pointer-events: none;
}
.skyline-svg {
  width: 100%;
  height: clamp(140px, 22vw, 260px);
  display: block;
  animation: skylineRise 1.4s var(--ease) both;
}
@keyframes skylineRise {
  from { transform: translateY(30px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* ============ SECTIONS ============ */
.section { padding: 110px 0; }
.section__eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.section__title {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}
.section__intro {
  max-width: 620px;
  color: var(--color-text);
  font-size: 1.05rem;
}

/* ============ REVEAL ANIMATION ============ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============ SERVICES ============ */
.services { background: var(--color-bg-alt); }
.services__grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}
.card__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.6s var(--ease);
}
.card:hover .card__media img { transform: scale(1.07); }
.card__body {
  position: relative;
  padding: 44px 30px 32px;
}
.card__icon {
  position: absolute;
  top: -28px;
  left: 30px;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-white);
  color: var(--color-secondary);
  box-shadow: var(--shadow-md);
  transition: background var(--transition-base), color var(--transition-base), transform var(--transition-base);
}
.card:hover .card__icon {
  background: var(--color-secondary);
  color: var(--color-white);
  transform: rotate(-6deg) scale(1.05);
}
.card__icon svg { width: 26px; height: 26px; }
.card__title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.card__text { color: var(--color-text); font-size: 0.98rem; }

/* ============ PROJECTS ============ */
.projects__grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.project {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.project:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}
.project__media {
  height: 220px;
  display: flex;
  align-items: flex-end;
  padding: 18px;
  position: relative;
  overflow: hidden;
  background: var(--color-bg-alt);
}
.project__media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}
.project:hover .project__media img { transform: scale(1.06); }
.project__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0,0,0,0.45), transparent 60%);
}
.project__tag {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,0.92);
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 999px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.project__body { padding: 22px 24px 26px; }
.project__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 6px;
}
.project__text { color: var(--color-muted); font-size: 0.92rem; }

/* ============ ABOUT / TEAM ============ */
.about { background: var(--color-bg-alt); }
.team__grid {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.team__card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px 34px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}
.team__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}
.team__avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
  color: var(--color-white);
  font-size: 1.6rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  margin-bottom: 20px;
}
.team__name {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 4px;
}
.team__role {
  color: var(--color-secondary);
  font-weight: 600;
  margin-bottom: 18px;
}
.team__facts {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 22px;
}
.team__facts li {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary);
}
.team__email {
  display: inline-block;
  color: var(--color-secondary);
  font-weight: 600;
  font-size: 0.95rem;
  transition: color var(--transition-base);
}
.team__email:hover { color: var(--color-accent-alt); }

/* ============ CONTACT ============ */
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.contact__address {
  font-style: normal;
  margin-top: 28px;
  font-size: 1.02rem;
  line-height: 1.9;
}
.contact__address a {
  color: var(--color-secondary);
  font-weight: 600;
  transition: color var(--transition-base);
}
.contact__address a:hover { color: var(--color-accent-alt); }

.contact__map { margin-top: 32px; }
.contact__map-hint {
  font-size: 0.82rem;
  color: var(--color-muted);
  margin-top: 10px;
  max-width: 420px;
}
.contact__map-hint a { color: var(--color-secondary); text-decoration: underline; }
.contact__map-frame {
  margin-top: 16px;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 0;
  transition: height var(--transition-base);
}
.contact__map-frame.is-loaded { height: 260px; }
.contact__map-frame iframe { width: 100%; height: 100%; border: 0; }

.contact__form {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form__group { display: flex; flex-direction: column; gap: 8px; }
.form__group label { font-weight: 600; font-size: 0.92rem; color: var(--color-primary); }
.form__group input,
.form__group textarea {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--color-border);
  background: var(--color-bg-alt);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
  resize: vertical;
}
.form__group input:focus,
.form__group textarea:focus {
  outline: none;
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 4px rgba(42, 99, 126, 0.12);
}
.form__group--checkbox {
  flex-direction: row;
  align-items: flex-start;
  gap: 10px;
}
.form__group--checkbox input { margin-top: 4px; }
.form__group--checkbox label { font-weight: 400; font-size: 0.85rem; color: var(--color-text); }
.form__group--checkbox a { color: var(--color-secondary); text-decoration: underline; }
.form__status { font-size: 0.9rem; font-weight: 600; min-height: 1.2em; }
.form__status.success { color: #2f7a4c; }
.form__status.error { color: var(--color-accent); }

/* ============ CTA BANNER ============ */
.cta-banner {
  background: linear-gradient(120deg, var(--color-secondary-dark), var(--color-primary));
  padding: 72px 0;
}
.cta-banner__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
}
.cta-banner__title {
  font-size: clamp(1.8rem, 3.6vw, 2.6rem);
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: -0.01em;
}
.cta-banner .btn--primary {
  background: var(--color-white);
  color: var(--color-secondary-dark);
}
.cta-banner .btn--primary:hover, .cta-banner .btn--primary:focus-visible {
  background: var(--color-bg-alt);
  color: var(--color-secondary-dark);
}

/* ============ FOOTER ============ */
.site-footer {
  background: var(--color-primary);
  color: var(--color-skyline-light);
  padding: 56px 0 28px;
}
.site-footer .logo__text { color: var(--color-white); }
.site-footer .logo__text--accent { color: var(--color-accent-alt); }
.site-footer__inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
  padding-bottom: 28px;
  border-bottom: 1px solid rgba(255,255,255,0.15);
}
.site-footer__brand p { margin-top: 8px; color: var(--color-muted); font-size: 0.9rem; }
.site-footer__nav {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.site-footer__nav a {
  font-size: 0.92rem;
  color: var(--color-skyline-light);
  transition: color var(--transition-base);
}
.site-footer__nav a:hover { color: var(--color-accent-alt); }
.site-footer__social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
  color: var(--color-skyline-light);
  transition: color var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}
.site-footer__social:hover, .site-footer__social:focus-visible {
  color: var(--color-white);
  border-color: var(--color-accent-alt);
  background: rgba(255, 255, 255, 0.08);
}
.site-footer__copy {
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--color-muted);
}

/* ============ COOKIE BANNER ============ */
.cookie-banner {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 200;
  background: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(120%);
  transition: transform var(--transition-base);
}
.cookie-banner[aria-hidden="false"] { transform: translateY(0); }
.cookie-banner__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.cookie-banner__inner p { font-size: 0.88rem; flex: 1 1 420px; color: var(--color-skyline-light); }
.cookie-banner__inner a { color: var(--color-accent-alt); text-decoration: underline; }

/* ============ BACK TO TOP ============ */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-secondary);
  color: var(--color-white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), background var(--transition-base);
  z-index: 90;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-secondary-dark); }

/* ============ LEGAL PAGES ============ */
.legal {
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 100px;
}
.legal .container { max-width: 820px; }
.legal h1 { color: var(--color-primary); font-size: 2.2rem; margin-bottom: 28px; }
.legal h2 { color: var(--color-primary); font-size: 1.3rem; margin-top: 36px; margin-bottom: 14px; }
.legal p, .legal li { margin-bottom: 12px; color: var(--color-text); }
.legal ul { list-style: disc; padding-left: 22px; }
.legal a { color: var(--color-secondary); text-decoration: underline; }
.legal .back-link { display: inline-block; margin-bottom: 32px; color: var(--color-secondary); font-weight: 600; }

/* ============ RESPONSIVE ============ */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; gap: 40px; padding-bottom: 200px; }
  .hero__content { max-width: none; }
  .hero__visual { aspect-ratio: 16 / 10; max-width: 560px; margin-inline: auto; }
  .services__grid { grid-template-columns: 1fr 1fr; }
  .team__grid { grid-template-columns: 1fr; max-width: 460px; margin-inline: auto; }
  .contact__inner { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav { position: fixed; inset: 0 0 0 auto; width: min(320px, 82vw); height: 100vh;
    background: var(--color-white); box-shadow: -8px 0 30px rgba(0,0,0,0.12);
    transform: translateX(100%); transition: transform var(--transition-base);
    display: flex; align-items: center; z-index: 105; }
  .nav.is-open { transform: translateX(0); }
  .nav__list { flex-direction: column; width: 100%; padding: 0 32px; gap: 6px; }
  .nav__link { display: block; padding: 14px 18px; }
  .burger { display: flex; }
  .hero__inner { padding-bottom: 180px; }
  .hero__visual { aspect-ratio: 4 / 3; }
  .services__grid { grid-template-columns: 1fr; }
  .projects__grid { grid-template-columns: 1fr; }
  .section { padding: 76px 0; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; align-items: stretch; }
  .contact__form { padding: 26px 20px; }
  .cookie-banner__inner { flex-direction: column; align-items: stretch; }
}