/* =========================================================
   Dianbonuz — Ingenieursysteme
   styles.css
   ========================================================= */

:root {
  /* Backgrounds */
  --color-bg: #e9dfd2;
  --color-bg-section: #f5efe6;
  --color-bg-block: #dcc8b3;

  /* Accents */
  --color-primary: #1f4e79;
  --color-primary-dark: #163a5a;
  --color-terracotta: #c46a38;
  --color-turquoise: #1f9d8b;
  --color-graphite: #343434;

  /* Text */
  --color-heading: #3b3129;
  --color-text: #575757;
  --color-text-light: #8c8c8c;
  --color-border: #d7c7b8;

  --color-white: #ffffff;

  /* Fonts */
  --font-heading: "Plus Jakarta Sans", "Sora", sans-serif;
  --font-body: "DM Sans", sans-serif;
  --font-ui: "Outfit", sans-serif;

  --radius-card: 24px;
  --radius-btn: 20px;

  --container-padding: 3rem;
  --shadow-soft: 0 10px 30px rgba(59, 49, 41, 0.08);
  --shadow-hover: 0 16px 40px rgba(59, 49, 41, 0.14);

  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  overflow-y: scroll;
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-wrap: anywhere;
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: var(--font-heading);
  color: var(--color-heading);
  margin: 0 0 1rem;
  line-height: 1.25;
}

h1 {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
}
h2 {
  font-size: clamp(1.8rem, 3vw, 2.4rem);
}
h3 {
  font-size: 1.3rem;
  color: var(--color-graphite);
}

p {
  margin: 0 0 1rem;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-inline: var(--container-padding);
}
.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 3rem;
  align-items: center;
}
section {
  padding-block: 5rem;
  padding-inline: var(--container-padding);
}

.section-bg {
  background-color: var(--color-bg-section);
}

.section-block {
  background-color: var(--color-bg-block);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-turquoise);
  background: rgba(31, 157, 139, 0.12);
  padding: 0.35rem 0.9rem;
  border-radius: 999px;
  margin-bottom: 1rem;
}

.section-header {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-header.align-left {
  margin: 0 0 3rem;
  text-align: left;
}

.subheadline {
  color: var(--color-text);
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1rem;
  padding: 0.9rem 1.9rem;
  border-radius: var(--radius-btn);
  border: 2px solid transparent;
  cursor: pointer;
  transition:
    background var(--transition),
    color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover {
  background: var(--color-terracotta);
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-3px);
}

.btn-light {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn-light:hover {
  background: var(--color-terracotta);
  color: var(--color-white);
  transform: translateY(-3px);
}

/* =========================================================
   Header
   ========================================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 239, 230, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--color-heading);
}

.brand img {
  height: 42px;
  width: auto;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 2.2rem;
}

.main-nav a {
  font-family: var(--font-ui);
  font-weight: 500;
  color: var(--color-graphite);
  position: relative;
  padding-block: 0.3rem;
  transition: color var(--transition);
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-terracotta);
  transition: width var(--transition);
}

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

.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  flex-direction: column;
  gap: 5px;
  padding: 0.4rem;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-heading);
  transition:
    transform var(--transition),
    opacity var(--transition);
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}

.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(31, 78, 121, 0.75),
    rgba(59, 49, 41, 0.75)
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding-inline: 1.5rem;
}

.hero-content h1 {
  color: var(--color-white);
}

.hero-content p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.92);
}

.page-hero {
  position: relative;
  padding-block: 6rem 4rem;
  text-align: center;
  background: linear-gradient(180deg, var(--color-bg-block), var(--color-bg));
}

.page-hero h1 {
  margin-bottom: 0.8rem;
}

.breadcrumbs {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 1rem;
}

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

/* =========================================================
   Cards — Kompetenzen
   ========================================================= */
.grid {
  display: grid;
  gap: 1.8rem;
}

.grid-5 {
  grid-template-columns: repeat(5, 1fr);
}
.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}
.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 2rem 1.6rem;
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-color var(--transition);
}

.card:hover {
  transform: translateY(-6px) rotate(1deg);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-turquoise);
}

.card .icon {
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background: rgba(31, 78, 121, 0.1);
  color: var(--color-primary);
  margin-bottom: 1.2rem;
}

.card .icon svg {
  width: 26px;
  height: 26px;
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 0.8rem;
  font-family: var(--font-ui);
  font-weight: 600;
  color: var(--color-terracotta);
  transition: gap var(--transition);
}

.card:hover .card-arrow {
  gap: 0.8rem;
}

/* Vorteile */
.advantage {
  text-align: center;
  padding: 1.5rem;
}

.advantage .icon {
  margin: 0 auto 1.2rem;
}

/* =========================================================
   Timeline
   ========================================================= */
.timeline {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(200px, 100%), 1fr));
  gap: 2rem;
  position: relative;
  margin-top: 3rem;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 6%;
  right: 6%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.timeline-step {
  position: relative;
  z-index: 1;
  text-align: center;
}

.timeline-step .step-number {
  width: 56px;
  height: 56px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-soft);
}

/* =========================================================
   Projects
   ========================================================= */
.project-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  min-height: 340px;
  display: flex;
  align-items: flex-end;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-soft);
  transition: transform var(--transition);
}

.project-card:hover {
  transform: scale(1.02);
}

.project-card-overlay {
  position: relative;
  z-index: 1;
  padding: 2rem;
  color: var(--color-white);
  width: 100%;
  background: linear-gradient(
    180deg,
    rgba(52, 52, 52, 0) 0%,
    rgba(31, 29, 26, 0.85) 100%
  );
}

.project-card-overlay h3 {
  color: var(--color-white);
}

.project-card-overlay a {
  color: #f5efe6;
  font-weight: 600;
  font-family: var(--font-ui);
}

/* =========================================================
   Stats
   ========================================================= */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-number {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--color-turquoise);
}

.stat-label {
  font-family: var(--font-ui);
  color: var(--color-text-light);
}

/* =========================================================
   CTA sections
   ========================================================= */
.cta-section {
  text-align: center;
  background: linear-gradient(135deg, #dce7ec, #f5efe6);
  border-radius: var(--radius-card);
  margin-inline: auto;
  max-width: 1100px;
}

.cta-section.dark {
  background: linear-gradient(
    135deg,
    var(--color-primary),
    var(--color-primary-dark)
  );
  color: var(--color-white);
}

.cta-section.dark h2,
.cta-section.dark p {
  color: var(--color-white);
}

.cta-section.plain {
  background: var(--color-white);
  border: 1px solid var(--color-border);
}

/* =========================================================
   About page specifics
   ========================================================= */
.values-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}

.statement-block {
  text-align: center;
  padding-block: 6rem;
}

.statement-block blockquote {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--color-heading);
  max-width: 900px;
  margin: 0 auto;
  font-weight: 600;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.8rem;
}

.team-card {
  background: var(--color-white);
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

.team-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
}

.team-card img {
  width: 100%;
  height: 280px;
  object-fit: cover;
}

.team-card-body {
  padding: 1.5rem;
}

.team-card .position {
  color: var(--color-turquoise);
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.team-card blockquote {
  font-style: italic;
  color: var(--color-text-light);
  font-size: 0.9rem;
  border-left: 3px solid var(--color-terracotta);
  padding-left: 0.8rem;
  margin: 1rem 0 0;
}

/* =========================================================
   Services page
   ========================================================= */
.service-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  padding-block: 4rem;
  border-bottom: 1px solid var(--color-border);
}

.service-block:last-child {
  border-bottom: none;
}

.service-block.reverse {
  direction: rtl;
}

.service-block.reverse > * {
  direction: ltr;
}

.service-block img {
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-soft);
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.service-block ul {
  margin-top: 1.2rem;
}

.service-block ul li {
  position: relative;
  padding-left: 1.6rem;
  margin-bottom: 0.6rem;
}

.service-block ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--color-turquoise);
}

/* FAQ Accordion */
.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  margin-bottom: 1rem;
  background: var(--color-white);
  overflow: hidden;
}

.accordion-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.3rem 1.6rem;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.accordion-question .plus {
  font-size: 1.4rem;
  color: var(--color-terracotta);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.accordion-item.active .accordion-question .plus {
  transform: rotate(45deg);
}

.accordion-answer {
  max-height: 0;
  overflow: hidden;
  transition:
    max-height var(--transition),
    padding var(--transition);
  padding: 0 1.6rem;
  color: var(--color-text);
}

.accordion-item.active .accordion-answer {
  max-height: 400px;
  padding: 0 1.6rem 1.3rem;
}

/* =========================================================
   Contact page
   ========================================================= */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info-list {
  margin-top: 1.5rem;
}

.contact-info-list li {
  display: flex;
  gap: 0.9rem;
  align-items: flex-start;
  margin-bottom: 1.3rem;
}

.contact-info-list .icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: rgba(196, 106, 56, 0.12);
  color: var(--color-terracotta);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-list .icon svg {
  width: 20px;
  height: 20px;
}

.map-wrapper {
  margin-top: 2rem;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-soft);
}

.map-wrapper iframe {
  width: 100%;
  height: 320px;
  border: 0;
  display: block;
}

.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 2.5rem;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-soft);
}

.form-group {
  margin-bottom: 1.3rem;
}

.form-group label {
  display: block;
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-heading);
  margin-bottom: 0.4rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--color-border);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-bg-section);
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

.form-note {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 0.5rem;
}

/* =========================================================
   Legal pages
   ========================================================= */
.legal-content h2 {
  margin-top: 2.5rem;
}

.legal-content ol,
.legal-content ul.legal-list {
  padding-left: 1.4rem;
  margin-bottom: 1.5rem;
}

.legal-content ol li,
.legal-content ul.legal-list li {
  margin-bottom: 0.9rem;
  list-style: decimal;
}

.legal-content ul.legal-list li {
  list-style: disc;
}

.legal-content {
  max-width: 860px;
  margin: 0 auto;
}

.updated-note {
  color: var(--color-text-light);
  font-size: 0.9rem;
  margin-bottom: 2rem;
}

/* =========================================================
   Popup / Modal
   ========================================================= */
.popup-overlay {
  position: fixed;
  inset: 0;
  background: rgba(59, 49, 41, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1.5rem;
}

.popup-overlay.active {
  display: flex;
}

.popup-box {
  background: var(--color-white);
  border-radius: var(--radius-card);
  padding: 2.6rem 2.2rem;
  max-width: 420px;
  width: 100%;
  text-align: center;
  position: relative;
  box-shadow: var(--shadow-hover);
  animation: popupIn 0.35s ease;
}

@keyframes popupIn {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.popup-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1.2rem;
  border-radius: 50%;
  background: rgba(31, 157, 139, 0.15);
  color: var(--color-turquoise);
  display: flex;
  align-items: center;
  justify-content: center;
}

.popup-icon svg {
  width: 32px;
  height: 32px;
}

.popup-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.4rem;
  color: var(--color-text-light);
  line-height: 1;
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  background: var(--color-graphite);
  color: #e9e4dd;
  padding-block: 4rem 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-brand img {
  height: 38px;
  width: auto;
}

.footer-col h4 {
  font-family: var(--font-ui);
  color: var(--color-white);
  font-size: 1rem;
  margin-bottom: 1.1rem;
}

.footer-col p,
.footer-col a {
  color: #c9c3ba;
  font-size: 0.95rem;
}

.footer-col ul li {
  margin-bottom: 0.7rem;
}

.footer-col ul li a:hover {
  color: var(--color-turquoise);
}

.footer-social {
  display: flex;
  gap: 0.8rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  transition: background var(--transition);
}

.footer-social a:hover {
  background: var(--color-turquoise);
}

.footer-social svg {
  width: 18px;
  height: 18px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  padding-top: 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: #a8a199;
}

.footer-bottom a {
  color: #a8a199;
}

.footer-bottom a:hover {
  color: var(--color-turquoise);
}

/* =========================================================
   Reveal animation
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.7s ease,
    transform 0.7s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 1024px) {
  .grid-5 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .team-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .timeline {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .contact-layout {
    grid-template-columns: 1fr;
  }
  .service-block {
    grid-template-columns: 1fr;
  }
  .service-block.reverse {
    direction: ltr;
  }
  .service-block img {
    order: -1;
  }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background: var(--color-bg-section);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 1rem 1.5rem 2rem;
    border-bottom: 1px solid var(--color-border);
    transform: translateY(-130%);
    opacity: 0;
    transition:
      transform var(--transition),
      opacity var(--transition);
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
  }

  .main-nav a {
    padding-block: 0.7rem;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}

@media (max-width: 768px) {
  :root {
    --container-padding: 1rem;
  }

  .grid-3,
  .grid-4,
  .grid-5,
  .values-grid,
  .team-grid,
  .stats,
  .timeline {
    grid-template-columns: 1fr;
  }

  .timeline::before {
    display: none;
  }

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

  .statement-block {
    padding-block: 3rem;
  }

  section {
    padding-block: 3rem;
  }
}