/* ==========================================================================
   Energieberatung Landingpage – Stylesheet
   ========================================================================== */

:root {
  --color-primary: #a8592e;      /* Terrakotta – Haus-/Sonnen-/Blitz-Icon */
  --color-primary-dark: #8b4726;
  --color-accent: #4a6b3e;       /* Salbeigrün – Blatt-Icon */
  --color-mint: #dcefce;         /* Pastellgrün – Kreisfläche im Symbolbild */
  --color-dark: #3a2c1f;
  --color-text: #4a3d30;
  --color-text-light: #8b7a67;
  --color-bg: #fdfaf5;
  --color-bg-alt: #f3e3d3;
  --color-border: #e8d7c3;

  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  --container-width: 1140px;
  --radius: 10px;
  --shadow: 0 8px 24px rgba(58, 44, 31, 0.1);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  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 {
  color: var(--color-dark);
  line-height: 1.25;
  margin: 0 0 .5em;
}

h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); text-align: center; }
h3 { font-size: 1.15rem; }

p { margin: 0 0 1em; }

a { color: var(--color-primary); }

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

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

.section-intro {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 2.5rem;
  color: var(--color-text-light);
}

/* Buttons
   ========================================================================== */

.btn {
  display: inline-block;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 600;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background-color .15s ease;
  border: none;
  cursor: pointer;
  font-size: 1rem;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.btn-small {
  padding: 10px 20px;
  font-size: .9rem;
}

/* Header
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-dark);
  text-decoration: none;
}

.logo img {
  height: 70px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.main-nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

.main-nav a:hover {
  color: var(--color-primary);
}

.main-nav a.btn {
  color: #fff;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
}

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

.hero {
  background: linear-gradient(160deg, var(--color-bg-alt) 0%, var(--color-mint) 100%);
  padding: 80px 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text .lead {
  font-size: 1.15rem;
  color: var(--color-text-light);
}

.hero-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Grids & Cards
   ========================================================================== */

.grid {
  display: grid;
  gap: 24px;
}

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

.card {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform .15s ease, box-shadow .15s ease;
}

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

.card-icon {
  font-size: 2rem;
  margin-bottom: .5rem;
}

/* Sections
   ========================================================================== */

.services,
.benefits {
  padding: 90px 0;
}

.about {
  padding: 90px 0;
  background: var(--color-bg-alt);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.about-image img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* Kundenmeinungen
   ========================================================================== */

.testimonials {
  padding: 90px 0;
  background: var(--color-bg-alt);
}

.testimonial-card {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.testimonial-avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  object-fit: cover;
}

.testimonial-text {
  font-style: italic;
  color: var(--color-text);
  margin: 0;
}

.testimonial-author {
  margin: 0;
  font-size: .9rem;
  color: var(--color-text-light);
}

.testimonial-author strong {
  color: var(--color-dark);
  font-style: normal;
}

/* FAQ
   ========================================================================== */

.faq {
  padding: 90px 0;
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
}

.faq-item summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--color-dark);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-primary);
  transition: transform .2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding-top: 12px;
  color: var(--color-text-light);
}

.faq-answer :last-child {
  margin-bottom: 0;
}

/* Contact
   ========================================================================== */

.contact {
  padding: 90px 0;
  background: var(--color-dark);
  color: #e8ddd0;
}

.contact h2,
.contact h3 {
  color: #fff;
}

.contact .section-intro {
  color: #c2b2a0;
}

.contact-form {
  max-width: 560px;
  margin: 0 auto;
  background: #fff;
  padding: 32px;
  border-radius: var(--radius);
  color: var(--color-text);
}

.form-row {
  margin-bottom: 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row label {
  font-weight: 600;
  font-size: .9rem;
}

.form-row input,
.form-row textarea {
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  font-family: inherit;
  font-size: 1rem;
  resize: vertical;
}

.form-checkbox label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-weight: 400;
  font-size: .85rem;
  color: var(--color-text-light);
  cursor: pointer;
}

.form-checkbox input[type="checkbox"] {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
}

.form-checkbox a {
  color: var(--color-primary);
  text-decoration: underline;
}

.form-row input:focus,
.form-row textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.form-hint {
  font-size: .8rem;
  color: var(--color-text-light);
}

.contact-form .btn {
  width: 100%;
}

.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-message {
  max-width: 560px;
  margin: 0 auto;
  padding: 18px 22px;
  border-radius: var(--radius);
  font-weight: 500;
}

.form-success {
  background: var(--color-mint);
  color: var(--color-accent);
}

.form-error {
  background: #fbeaea;
  color: #a3312b;
}

/* Footer
   ========================================================================== */

.site-footer {
  background: #2c2116;
  color: #d9c7b2;
  padding: 60px 0 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  padding-bottom: 40px;
  max-width: 640px;
}

.footer-col h3,
.footer-col h4 {
  color: #fff;
}

.footer-col a {
  color: #d9c7b2;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  font-size: .85rem;
  text-align: center;
}

.footer-bottom p {
  margin: 0 0 8px;
}

.footer-legal {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.footer-legal a {
  color: #d9c7b2;
}

.footer-legal a:hover {
  color: #fff;
}

/* Legal pages (Datenschutz, Impressum)
   ========================================================================== */

.legal-page {
  padding: 90px 0;
}

.legal-page h1 {
  text-align: center;
  margin-bottom: 1.5em;
}

.legal-content {
  max-width: 760px;
  margin: 0 auto;
}

.legal-content h2,
.legal-content h3 {
  margin-top: 1.5em;
}

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

@media (max-width: 900px) {
  .hero-inner,
  .about-inner {
    grid-template-columns: 1fr;
  }

  .about-image { order: -1; }

  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-inner {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .main-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    border-bottom: 1px solid var(--color-border);
    max-height: 0;
    overflow: hidden;
    transition: max-height .25s ease;
  }

  .main-nav.is-open {
    max-height: 420px;
  }

  .main-nav a {
    width: 100%;
    padding: 14px 24px;
    border-top: 1px solid var(--color-border);
  }

  .main-nav a.btn {
    margin: 14px 24px;
    width: calc(100% - 48px);
    text-align: center;
  }

  .nav-toggle {
    display: flex;
  }

  .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }

  .hero, .services, .about, .benefits, .testimonials, .faq, .contact {
    padding: 56px 0;
  }
}