/* LPAI-Solutions — calm, trustworthy consultancy look.
   Palette and spacing via custom properties; system fonts only (GDPR: no hotlinked fonts). */

:root {
  --ink: #1c2733;
  --ink-soft: #46586a;
  --accent: #16567d;
  --accent-dark: #0f4060;
  --silver: #aca69b;
  --silver-soft: #d8d3c9;
  --silver-light: #f3f1ec;
  --bg: #ffffff;
  --bg-alt: #f4f7f9;
  --line: #dfe6ec;
  --radius: 10px;
  --container: 1080px;
  --font: ui-sans-serif, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 4.5vw, 2.9rem); font-weight: 700; }
h2 { font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Header / Nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4.25rem;
}

.brand {
  font-weight: 750;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.brand span { color: var(--accent); }

.main-nav { display: flex; align-items: center; gap: 1.75rem; }

.main-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  font-size: 0.97rem;
}
.main-nav a:hover { color: var(--ink); }
.main-nav a.active { color: var(--ink); font-weight: 650; }

.main-nav a.nav-cta {
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
}
.main-nav a.nav-cta:hover { background: var(--accent-dark); color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.45rem 0.6rem;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  color: var(--ink);
}

/* ---------- Hero ---------- */

.hero {
  padding: 5.5rem 0 4.5rem;
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, var(--silver-light) 0%, var(--bg) 70%);
}
.hero .container { position: relative; z-index: 1; }

/* Animated hero watermark: a rooftop antenna site is planned (blueprint),
   imagined (dashed ghost), built and goes live — then it loops.
   All elements share one cycle; each animates inside its % window:
   0–5 grid · 2–16 building sketch · 8–19 plan details · 15–38 ghost
   27–40 pole rises · 41–50 panels · 51–67 lobes evolve · –88 live pulsing
   89–100 fade out, restart. */
.hero-scene {
  --cycle: 22s;
  position: absolute;
  inset: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  pointer-events: none;
  opacity: 0.38;
  color: var(--accent);
}
.hero-scene svg {
  width: min(880px, 95%);
  max-height: 100%;
  height: auto;
  animation: cy-wrap var(--cycle) linear infinite;
}

.scene-grid { color: var(--silver-soft); opacity: 0; animation: cy-grid var(--cycle) linear infinite; }
.scene-sketch { stroke: var(--silver); stroke-width: 1.4; fill: none; }
.scene-dim { stroke: var(--silver-soft); stroke-width: 1.1; fill: none; }
.scene-solid { stroke: var(--accent); stroke-width: 2; fill: var(--accent); }
.scene-solid path { fill: none; }

.scene-ghost {
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.6;
  stroke-dasharray: 5 6;
  opacity: 0;
  animation: cy-ghost var(--cycle) linear infinite;
}

.scene-draw1, .scene-draw2, .scene-draw3 {
  stroke-dasharray: var(--len);
  stroke-dashoffset: var(--len);
}
.scene-draw1 { animation: cy-draw1 var(--cycle) ease infinite; }
.scene-draw2 { animation: cy-draw2 var(--cycle) ease infinite; }
.scene-draw3 { animation: cy-draw3 var(--cycle) ease infinite; }

.scene-rise {
  transform: scaleY(0);
  transform-box: fill-box;
  transform-origin: 50% 100%;
  animation: cy-rise var(--cycle) ease infinite;
}
.scene-pop {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: 50% 50%;
  animation: cy-pop var(--cycle) ease infinite;
}

.scene-lobe, .scene-petal { fill: var(--accent); stroke: none; opacity: 0; transform-box: fill-box; }
.scene-lobe { transform-origin: 0% 50%; }
.scene-petal { transform-origin: 50% 100%; }
.scene-glow { transform-origin: 50% 50%; }
.lobe-a { animation: cy-lobe-a var(--cycle) ease-in-out infinite; }
.lobe-b { animation: cy-lobe-b var(--cycle) ease-in-out infinite; }
.lobe-c { animation: cy-lobe-c var(--cycle) ease-in-out infinite; }

@keyframes cy-wrap { 0%, 89% { opacity: 1; } 97%, 100% { opacity: 0; } }
@keyframes cy-grid { 0% { opacity: 0; } 5%, 100% { opacity: 1; } }
@keyframes cy-draw1 { 0%, 2% { stroke-dashoffset: var(--len); } 16%, 100% { stroke-dashoffset: 0; } }
@keyframes cy-draw2 { 0%, 8% { stroke-dashoffset: var(--len); } 19%, 100% { stroke-dashoffset: 0; } }
@keyframes cy-draw3 { 0%, 13% { stroke-dashoffset: var(--len); } 19%, 100% { stroke-dashoffset: 0; } }
@keyframes cy-ghost { 0%, 15% { opacity: 0; } 21%, 31% { opacity: 0.85; } 38%, 100% { opacity: 0; } }
@keyframes cy-rise { 0%, 27% { transform: scaleY(0); } 40%, 100% { transform: scaleY(1); } }
@keyframes cy-pop { 0%, 41% { transform: scale(0.2); opacity: 0; } 50%, 100% { transform: scale(1); opacity: 1; } }
@keyframes cy-lobe-a {
  0%, 51% { transform: scale(0); opacity: 0; }
  61% { transform: scale(1); opacity: 0.5; }
  70% { opacity: 0.26; }
  79% { opacity: 0.5; }
  88%, 100% { transform: scale(1); opacity: 0.4; }
}
@keyframes cy-lobe-b {
  0%, 54% { transform: scale(0); opacity: 0; }
  64% { transform: scale(1); opacity: 0.5; }
  73% { opacity: 0.26; }
  82% { opacity: 0.5; }
  90%, 100% { transform: scale(1); opacity: 0.4; }
}
@keyframes cy-lobe-c {
  0%, 57% { transform: scale(0); opacity: 0; }
  67% { transform: scale(1); opacity: 0.5; }
  76% { opacity: 0.26; }
  85% { opacity: 0.5; }
  92%, 100% { transform: scale(1); opacity: 0.4; }
}

@media (prefers-reduced-motion: reduce) {
  .hero-scene svg, .hero-scene * { animation: none !important; }
  .scene-grid { opacity: 1; }
  .scene-draw1, .scene-draw2, .scene-draw3 { stroke-dashoffset: 0; }
  .scene-ghost { opacity: 0; }
  .scene-rise { transform: none; }
  .scene-pop { opacity: 1; transform: none; }
  .scene-lobe, .scene-petal { opacity: 0.4; }
}

.hero .kicker {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.hero h1 { max-width: 21ch; }

.hero .lead {
  margin-top: 1.4rem;
  max-width: 58ch;
  font-size: 1.18rem;
  color: var(--ink-soft);
}

.hero-actions { margin-top: 2.2rem; display: flex; gap: 1rem; flex-wrap: wrap; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  text-decoration: none;
  border-radius: 999px;
  padding: 0.75rem 1.6rem;
  font-weight: 600;
  font-size: 1rem;
  border: 1px solid transparent;
  cursor: pointer;
  font-family: var(--font);
}

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

.btn-secondary { border-color: var(--silver); color: var(--ink); background: #fff; }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }

/* ---------- Sections ---------- */

.section { padding: 4.5rem 0; }
.section.alt { background: var(--bg-alt); }

.section-head { max-width: 62ch; margin-bottom: 2.5rem; }
.section-head p { margin-top: 0.8rem; color: var(--ink-soft); }
.section-head h2::after {
  content: "";
  display: block;
  width: 52px;
  height: 3px;
  margin-top: 0.6rem;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--silver));
}

/* Experience strip on homepage */
.experience-strip {
  border-top: 1px solid var(--silver-soft);
  border-bottom: 1px solid var(--silver-soft);
  background: linear-gradient(90deg, var(--silver-light), var(--bg));
  padding: 1.4rem 0;
}
.experience-strip .container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 2.5rem;
  align-items: baseline;
}
.experience-strip .label {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--ink-soft);
}
.experience-strip .names {
  font-weight: 600;
  color: var(--ink-soft);
  font-size: 0.97rem;
}

/* ---------- Cards ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.4rem;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-top: 3px solid var(--silver);
  border-radius: var(--radius);
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  transition: border-top-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}
.card:hover {
  border-top-color: var(--accent);
  box-shadow: 0 10px 28px rgba(22, 86, 125, 0.1);
  transform: translateY(-2px);
}
.card p { color: var(--ink-soft); font-size: 0.97rem; flex-grow: 1; }
.card .card-link { font-weight: 600; font-size: 0.95rem; text-decoration: none; }

.card .icon {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--silver-light), var(--silver-soft));
  border: 1px solid var(--silver-soft);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

/* ---------- Feature rows (differentiator) ---------- */

.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}
.feature-row ul { list-style: none; display: grid; gap: 1.1rem; margin-top: 0.5rem; }
.feature-row li { padding-left: 1.7rem; position: relative; color: var(--ink-soft); }
.feature-row li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.feature-row li strong { color: var(--ink); }

/* ---------- Service detail blocks (Leistungen) ---------- */

.service-block {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.5rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
}
.service-block:first-of-type { border-top: none; }
.service-block .num {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
}
.service-block h3 { font-size: 1.35rem; margin-top: 0.3rem; }
.service-block .body p { color: var(--ink-soft); }
.service-block .body ul { margin: 1rem 0 0 1.2rem; color: var(--ink-soft); display: grid; gap: 0.45rem; }
.service-block .benefit {
  margin-top: 1.2rem;
  padding: 0.9rem 1.1rem;
  background: linear-gradient(90deg, var(--silver-light), var(--bg-alt));
  border-left: 3px solid var(--accent);
  border-radius: 0 8px 8px 0;
  font-size: 0.97rem;
}

/* ---------- About / timeline ---------- */

.about-intro { display: grid; grid-template-columns: 1fr 280px; gap: 3rem; align-items: start; }
.about-intro .text p { margin-bottom: 1rem; color: var(--ink-soft); }
.about-intro .text p:first-child { color: var(--ink); font-size: 1.15rem; }

.portrait-slot {
  background: var(--bg-alt);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  aspect-ratio: 4 / 5;
  display: flex;
  align-items: center;
  justify-content: center;
}
.portrait-slot .initials {
  font-size: 3rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.45;
}

.timeline { list-style: none; display: grid; gap: 0; margin-top: 1rem; }
.timeline li {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 1.5rem;
  padding: 1.3rem 0;
  border-top: 1px solid var(--line);
}
.timeline .when { font-weight: 650; font-size: 0.95rem; color: var(--accent); }
.timeline .what strong { display: block; }
.timeline .what p { color: var(--ink-soft); font-size: 0.97rem; margin-top: 0.25rem; }

.fact-list { list-style: none; display: grid; gap: 0.6rem; }
.fact-list li { padding-left: 1.6rem; position: relative; color: var(--ink-soft); }
.fact-list li::before { content: "·"; position: absolute; left: 0.4rem; color: var(--accent); font-weight: 700; }

/* ---------- CTA band ---------- */

.cta-band {
  background: linear-gradient(120deg, var(--ink) 0%, #22384c 55%, var(--accent-dark) 100%);
  color: #fff;
  padding: 4rem 0;
  border-top: 3px solid var(--silver);
}
.cta-band h2 { color: #fff; max-width: 24ch; }
.cta-band p { color: #b9c5d0; margin-top: 0.8rem; max-width: 55ch; }
.cta-band .btn-primary { margin-top: 1.8rem; }

/* ---------- Contact ---------- */

.contact-layout { display: grid; grid-template-columns: 1.4fr 1fr; gap: 3.5rem; align-items: start; }

.contact-form { display: grid; gap: 1.1rem; }
.contact-form label { font-weight: 600; font-size: 0.95rem; display: grid; gap: 0.35rem; }
.contact-form input,
.contact-form textarea {
  font-family: var(--font);
  font-size: 1rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  width: 100%;
}
.contact-form input:focus,
.contact-form textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent); }
.contact-form textarea { min-height: 160px; resize: vertical; }

.checkbox-row { display: flex; gap: 0.6rem; align-items: flex-start; font-size: 0.92rem; color: var(--ink-soft); }
.checkbox-row input { width: auto; margin-top: 0.3rem; }

/* honeypot — hidden from humans, bots fill it */
.hp-field { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }

.form-note { font-size: 0.88rem; color: var(--ink-soft); }

.form-banner {
  padding: 0.9rem 1.1rem;
  border-radius: 8px;
  font-weight: 550;
  display: none;
}
.form-banner.show { display: block; }
.form-banner.success { background: #e8f4ea; color: #1d6b30; border: 1px solid #bfdec6; }
.form-banner.error { background: #fbeaea; color: #97312f; border: 1px solid #ecc8c7; }

.contact-aside { display: grid; gap: 1.5rem; }
.contact-aside .card { gap: 0.4rem; }
.contact-aside a { word-break: break-all; }

/* ---------- Legal pages ---------- */

.legal { max-width: 72ch; }
.legal h1 { margin-bottom: 1.5rem; }
.legal h2 { font-size: 1.25rem; margin: 2.2rem 0 0.6rem; }
.legal h3 { font-size: 1.05rem; margin: 1.5rem 0 0.4rem; }
.legal p, .legal ul { color: var(--ink-soft); margin-bottom: 0.8rem; }
.legal ul { margin-left: 1.2rem; }
.legal address { font-style: normal; color: var(--ink-soft); }

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--silver-soft);
  background: var(--silver-light);
  padding: 2.5rem 0;
  margin-top: 2rem;
  font-size: 0.93rem;
  color: var(--ink-soft);
}
.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2.5rem;
  justify-content: space-between;
  align-items: baseline;
}
.site-footer nav { display: flex; gap: 1.5rem; }
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-row, .about-intro, .contact-layout { grid-template-columns: 1fr; gap: 2rem; }
  .about-intro .portrait-slot { max-width: 260px; }
  .service-block { grid-template-columns: 1fr; gap: 0.8rem; padding: 2rem 0; }
}

@media (max-width: 640px) {
  .card-grid { grid-template-columns: 1fr; }
  .hero { padding: 3.5rem 0 3rem; }
  .hero-scene { opacity: 0.22; }
  .hero-scene svg { width: 120%; }
  .section { padding: 3rem 0; }
  .timeline li { grid-template-columns: 1fr; gap: 0.3rem; }

  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem 1.4rem;
    gap: 1rem;
  }
  .main-nav.open { display: flex; }
  .main-nav a.nav-cta { text-align: center; }
}