/* ===== DS Beratung - Design System ===== */
:root {
  --color-primary: #0B5ED7;
  --color-dark: #0A1A2F;
  --color-bg: #F5F7FA;
  --color-accent: #2BB673;
  --color-neutral: #5B6B7D;
  --color-white: #FFFFFF;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
  --max-width: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.15;
  color: var(--color-dark);
}

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

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

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

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid #E4E9EF;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-link img { height: 40px; width: auto; }

.main-nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
}

.main-nav a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-dark);
  position: relative;
  padding: 4px 0;
}

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

.main-nav a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
}

.nav-cta {
  background: var(--color-primary);
  color: var(--color-white) !important;
  padding: 10px 28px;
  border-radius: 6px;
  font-weight: 600 !important;
  transition: background 0.2s ease;
}
.nav-cta:hover { background: #094db8; }

.nav-toggle { display: none; }

/* ===== Hero ===== */
.hero {
  padding: 120px 0 100px;
  background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-white) 100%);
  position: relative;
  overflow: hidden;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: 20px;
  font-weight: 600;
}

.hero h1 {
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  margin-bottom: 24px;
}

.hero .lead {
  font-size: 1.15rem;
  color: var(--color-neutral);
  max-width: 540px;
  margin-bottom: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}
.btn-primary:hover { background: #094db8; transform: translateY(-1px); }

.btn-outline {
  border-color: var(--color-dark);
  color: var(--color-dark);
}
.btn-outline:hover { background: var(--color-dark); color: var(--color-white); }

.hero-visual {
  position: relative;
  height: 380px;
}

/* Lastkurve signature element */
.loadcurve-svg {
  width: 100%;
  height: 100%;
}

.loadcurve-path {
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2.5;
  stroke-linecap: round;
  stroke-dasharray: 1400;
  stroke-dashoffset: 1400;
  animation: draw 2.4s ease forwards 0.3s;
}

.loadcurve-path.accent {
  stroke: var(--color-accent);
  stroke-width: 1.5;
  opacity: 0.6;
  animation-delay: 0.6s;
}

@keyframes draw {
  to { stroke-dashoffset: 0; }
}

@media (prefers-reduced-motion: reduce) {
  .loadcurve-path { animation: none; stroke-dashoffset: 0; }
  html { scroll-behavior: auto; }
}

/* Section divider using loadcurve motif */
.divider {
  height: 60px;
  width: 100%;
  overflow: hidden;
}
.divider svg { width: 100%; height: 100%; }
.divider path {
  stroke: #D8E0EA;
  stroke-width: 1.5;
  fill: none;
}

/* ===== Logo marquee (Kundenlogos) ===== */
.logo-marquee {
  background: var(--color-bg);
  border-top: 1px solid #E4E9EF;
  border-bottom: 1px solid #E4E9EF;
  padding: 32px 0;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(to right, transparent 0, #000 64px, #000 calc(100% - 64px), transparent 100%);
  mask-image: linear-gradient(to right, transparent 0, #000 64px, #000 calc(100% - 64px), transparent 100%);
}
.marquee-track {
  display: flex;
  width: max-content;
  flex-wrap: nowrap;
  animation: marquee-scroll 40s linear infinite;
  will-change: transform;
}
.marquee-content {
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
  flex-shrink: 0;
  gap: 130px;
  padding-right: 130px;
}
.marquee-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  padding: 0 8px;
  flex-shrink: 0;
}
.marquee-logo img {
  height: 40px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: filter 0.25s ease, opacity 0.25s ease;
  will-change: filter, opacity;
  transform: translateZ(0);
}
.marquee-logo:hover img,
.marquee-logo:focus-within img {
  filter: grayscale(0%);
  opacity: 1;
}
.marquee-logo.logo-on-dark {
  background: var(--color-dark);
  border-radius: 8px;
  padding: 10px 20px;
  height: 44px;
}
.marquee-logo.logo-on-dark img {
  height: 24px;
  filter: none;
  opacity: 0.85;
}
.marquee-logo.logo-on-dark:hover img,
.marquee-logo.logo-on-dark:focus-within img {
  opacity: 1;
}
@keyframes marquee-scroll {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-50%, 0, 0); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ===== Section generic ===== */
.section { padding: 96px 0; }
.section-bg { background: var(--color-bg); }

.section-head { max-width: 640px; margin-bottom: 56px; }
.section-head .eyebrow { margin-bottom: 12px; }
.section-head h2 { font-size: clamp(1.8rem, 3vw, 2.4rem); margin-bottom: 16px; }
.section-head p { color: var(--color-neutral); font-size: 1.05rem; }

/* ===== Service cards ===== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--color-white);
  border: 1px solid #E4E9EF;
  border-radius: 12px;
  padding: 32px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.service-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
}
.service-icon svg { width: 100%; height: 100%; stroke: var(--color-primary); }

.service-card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.service-card p { color: var(--color-neutral); font-size: 0.98rem; margin-bottom: 16px; }
.service-card a { color: var(--color-primary); font-weight: 600; font-size: 0.92rem; }

/* ===== Reference cards ===== */
.filter-bar {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.filter-chip {
  padding: 8px 18px;
  border-radius: 100px;
  border: 1px solid #D8E0EA;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--color-neutral);
  background: var(--color-white);
  cursor: pointer;
  transition: all 0.15s ease;
}
.filter-chip.active, .filter-chip:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: #EAF2FD;
}

.ref-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.ref-card {
  background: var(--color-white);
  border: 1px solid #E4E9EF;
  border-radius: 12px;
  padding: 28px;
}

.ref-tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  background: #EAF9F1;
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 14px;
}

.ref-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.ref-card ul { padding-left: 18px; color: var(--color-neutral); font-size: 0.94rem; }
.ref-card li { margin-bottom: 6px; }

/* ===== About / positioning ===== */
.about-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 56px;
  align-items: start;
}
.about-portrait {
  background: var(--color-bg);
  border-radius: 16px;
  aspect-ratio: 4/5;
  overflow: hidden;
  position: sticky;
  top: 100px;
}
.about-portrait-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 1fr;
  gap: 20px;
  align-items: stretch;
}
.pillar-item {
  background: var(--color-bg);
  border: 1px solid #E4E9EF;
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.pillar-icon { width: 34px; height: 34px; margin-bottom: 14px; flex-shrink: 0; }
.pillar-icon svg { width: 100%; height: 100%; stroke: var(--color-primary); }
.pillar-item h4 { font-size: 1rem; margin-bottom: 8px; }
.pillar-item p { color: var(--color-neutral); font-size: 0.9rem; line-height: 1.6; margin: 0; }

@media (max-width: 860px) {
  .about-portrait { position: static; }
  .pillars-grid { grid-template-columns: 1fr; }
}

/* ===== Testimonial placeholder ===== */
.placeholder-card {
  border: 1.5px dashed #D8E0EA;
  border-radius: 12px;
  padding: 32px;
  text-align: center;
  color: var(--color-neutral);
  font-size: 0.95rem;
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.contact-info h3 { margin-bottom: 16px; }
.contact-info p { color: var(--color-neutral); margin-bottom: 24px; }
.contact-detail { margin-bottom: 16px; }
.contact-detail .label { font-family: var(--font-mono); font-size: 0.78rem; color: var(--color-neutral); text-transform: uppercase; letter-spacing: 0.05em; }
.contact-detail .value { font-size: 1.05rem; font-weight: 600; }

.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 600; margin-bottom: 6px; }
.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #D8E0EA;
  border-radius: 6px;
  font-family: var(--font-body);
  font-size: 0.98rem;
  background: var(--color-white);
}
.form-group input:focus, .form-group textarea:focus {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
  border-color: var(--color-primary);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--color-dark);
  color: #B8C2CE;
  padding: 56px 0 28px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-brand img { height: 36px; margin-bottom: 12px; }
.footer-brand p { max-width: 320px; font-size: 0.92rem; }
.footer-links { display: flex; gap: 56px; flex-wrap: wrap; }
.footer-col h5 { color: var(--color-white); font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 14px; font-family: var(--font-mono); }
.footer-col a { display: block; color: #B8C2CE; font-size: 0.92rem; margin-bottom: 10px; }
.footer-col a:hover { color: var(--color-white); }
.footer-bottom {
  border-top: 1px solid #1E3A5C;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.85rem;
}

/* Skip link for accessibility */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-primary);
  color: white;
  padding: 12px 20px;
  z-index: 999;
}
.skip-link:focus { left: 0; }

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Responsive ===== */
@media (max-width: 860px) {
  .main-nav { display: none; }
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { height: 220px; order: -1; }
  .service-grid, .ref-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; }
  .footer-top { flex-direction: column; }
  .trust-bar .container { gap: 32px; }
}

/* ===== Testimonials ===== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.testimonial-card {
  background: var(--color-bg);
  border-radius: 16px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.testimonial-quote {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  line-height: 1.5;
  color: var(--color-dark);
}
.testimonial-quote::before {
  content: '\201C';
  color: var(--color-primary);
  font-family: var(--font-display);
  margin-right: 2px;
}
.testimonial-quote::after {
  content: '\201D';
  color: var(--color-primary);
  font-family: var(--font-display);
  margin-left: 2px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 14px;
}
.testimonial-avatar {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: 14px;
  overflow: hidden;
  border: 1.5px solid #D8E0EA;
  background: var(--color-white);
}
.testimonial-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.testimonial-author-info .name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-dark);
}
.testimonial-author-info .role {
  font-size: 0.85rem;
  color: var(--color-neutral);
}

@media (max-width: 860px) {
  .testimonial-grid { grid-template-columns: 1fr; }
}