/* ============================================================
   HAASCH HOMEPAGE – CSS
   Modernes Design mit Erdtönen
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  --color-bg:         #f5f1eb;
  --color-bg-alt:     #ede8df;
  --color-bg-dark:    #2c2416;
  --color-surface:    #ffffff;
  --color-primary:    #3d5a3e;   /* Dunkelgrün */
  --color-primary-h:  #2e4430;
  --color-accent:     #8b6914;   /* Goldbraun */
  --color-text:       #2c2416;
  --color-text-light: #6b5d4f;
  --color-border:     #d4c9b8;
  --color-white:      #ffffff;

  --font-serif:  'Playfair Display', Georgia, serif;
  --font-sans:   'Lato', system-ui, sans-serif;

  --radius-sm:   4px;
  --radius-md:   8px;
  --radius-lg:   16px;
  --radius-full: 9999px;

  --shadow-sm:   0 2px 8px rgba(44, 36, 22, 0.08);
  --shadow-md:   0 4px 20px rgba(44, 36, 22, 0.12);
  --shadow-lg:   0 8px 40px rgba(44, 36, 22, 0.16);

  --transition:  0.3s ease;
  --max-width:   1100px;
  --nav-height:  72px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--transition);
}
a:hover { color: var(--color-accent); }

ul { list-style: none; }

/* ---------- Typography ---------- */
h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: 1.2;
  color: var(--color-text);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 700; }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); font-weight: 600; }
h3 { font-size: 1.3rem; font-weight: 600; }

/* ---------- Utility ---------- */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 6rem 0;
}

.section-label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3.5rem;
}

.section-title {
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 700;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform 0.15s;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-h);
  border-color: var(--color-primary-h);
  color: var(--color-white);
}

.btn-submit {
  position: relative;
  min-width: 180px;
  justify-content: center;
}

.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: none;
}

.btn-submit.loading .btn-text { opacity: 0.5; }
.btn-submit.loading .btn-spinner { display: inline-block; }

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Fade-in (deaktiviert) ----------
   Animation entfernt: Inhalte sind sofort und unabhängig von JS sichtbar. */
.fade-in {
  opacity: 1;
  transform: none;
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(245, 241, 235, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
  height: var(--nav-height);
  display: flex;
  align-items: center;
}

.site-header.scrolled {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-container {
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.02em;
}
.nav-logo:hover { color: var(--color-primary); }

.logo-h {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-text-light);
  text-decoration: none;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   HERO SECTION
   ============================================================ */
.hero-section {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 3rem;
  padding-top: calc(var(--nav-height) + 4rem);
  padding-left: max(1.5rem, (100% - var(--max-width)) / 2 + 1.5rem);
  padding-right: max(1.5rem, (100% - var(--max-width)) / 2 + 1.5rem);
  background: linear-gradient(160deg, var(--color-bg) 60%, var(--color-bg-alt) 100%);
}

.hero-content { max-width: 540px; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.hero-title {
  margin-bottom: 1.5rem;
  color: var(--color-text);
}

.hero-text {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  margin-bottom: 2.5rem;
  max-width: 480px;
}

/* Hero Decorative Element */
.hero-deco {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 420px;
}

.deco-circle {
  position: absolute;
  border-radius: 50%;
}
.deco-circle--1 {
  width: 320px;
  height: 320px;
  background: var(--color-primary);
  opacity: 0.08;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.deco-circle--2 {
  width: 240px;
  height: 240px;
  border: 2px solid var(--color-accent);
  opacity: 0.25;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.deco-initial {
  font-family: var(--font-serif);
  font-size: 12rem;
  font-weight: 700;
  color: var(--color-primary);
  opacity: 0.12;
  user-select: none;
  line-height: 1;
}

/* ============================================================
   AHNENFORSCHUNG SECTION
   ============================================================ */
.ahnen-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  align-items: start;
}

/* Contact Info Sidebar */
.contact-info h3 {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.info-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.info-icon {
  color: var(--color-accent);
  font-size: 0.6rem;
  margin-top: 0.45em;
  flex-shrink: 0;
}

/* Contact Form */
.contact-form-wrapper h3 {
  margin-bottom: 1.75rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-row--two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

label {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.01em;
}

.required {
  color: #c0392b;
  margin-left: 2px;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  padding: 0.7rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-text);
  background: var(--color-bg);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(61, 90, 62, 0.12);
  background: var(--color-white);
}

input::placeholder,
textarea::placeholder { color: var(--color-border); }

textarea { resize: vertical; min-height: 120px; }

/* Checkbox */
.form-group--checkbox { margin-top: 0.25rem; }

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 400;
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-width: 18px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  appearance: none;
  cursor: pointer;
  padding: 0;
  margin-top: 2px;
  transition: background var(--transition), border-color var(--transition);
}
.checkbox-label input[type="checkbox"]:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 10 8' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 4l2.5 2.5L9 1' stroke='%23fff' stroke-width='1.5' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: 10px 8px;
}
.checkbox-label input[type="checkbox"]:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(61, 90, 62, 0.12);
}

/* Form Messages */
.form-message {
  padding: 0.875rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 400;
}
.form-message--success {
  background: #e8f5e9;
  color: #1b5e20;
  border: 1px solid #a5d6a7;
}
.form-message--error {
  background: #fce4ec;
  color: #880e4f;
  border: 1px solid #f48fb1;
}

/* Datenschutz Note */
.datenschutz-note {
  margin-top: 1.5rem;
  font-size: 0.8125rem;
  color: var(--color-text-light);
  padding: 1rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-accent);
  line-height: 1.6;
}

/* ============================================================
   BAUTAGEBUCH SECTION
   ============================================================ */
.bau-section {
  background: var(--color-bg-alt);
}

.bau-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.bau-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 2rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: transform var(--transition), box-shadow var(--transition);
}

.bau-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.bau-card-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1;
}

.bau-card h3 {
  margin-bottom: 0.75rem;
  font-size: 1.1rem;
}

.bau-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.bau-note {
  text-align: center;
  color: var(--color-text-light);
  font-size: 0.9375rem;
  padding: 1.5rem;
  max-width: 500px;
  margin: 0 auto;
}

/* ============================================================
   PROJEKTE SECTION
   ============================================================ */
.projekte-section {
  background: var(--color-bg);
}

.projekte-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.projekt-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.75rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-decoration: none;
  color: inherit;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.projekt-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
  color: inherit;
}

.projekt-card h3 {
  color: var(--color-primary);
  font-family: var(--font-serif);
  margin-bottom: 0.25rem;
}

.projekt-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  flex: 1;
}

.projekt-link {
  margin-top: 0.5rem;
  color: var(--color-accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 3rem 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  text-align: center;
}

.footer-copy {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem 1.5rem;
}

.footer-nav a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-nav a:hover { color: #ffffff; }

.footer-impressum a {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  text-decoration: none;
  transition: color var(--transition);
}
.footer-impressum a:hover { color: rgba(255,255,255,0.8); }

/* ============================================================
   RESPONSIVE – Tablet (≤ 900px)
   ============================================================ */
@media (max-width: 900px) {
  .hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: calc(var(--nav-height) + 3rem);
    padding-bottom: 4rem;
  }
  .hero-deco { height: 200px; }
  .deco-initial { font-size: 8rem; }

  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .bau-cards {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }
}

/* ============================================================
   RESPONSIVE – Mobile (≤ 600px)
   ============================================================ */
@media (max-width: 600px) {
  .section { padding: 4rem 0; }

  /* Mobile Nav */
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
    padding: 0 1.5rem;
  }

  .nav-links.open {
    max-height: 300px;
    padding: 1rem 1.5rem;
  }

  .nav-link {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border);
    border-left: none;
  }
  .nav-link:last-child { border-bottom: none; }

  .form-row--two {
    grid-template-columns: 1fr;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.6rem; }
}