/* Default: dark */
:root,
html[data-theme="dark"] {
  --ink: #e8eef4;
  --muted: #8b9aab;
  --paper: #070b10;
  --panel: rgba(18, 26, 36, 0.72);
  --accent: #2dd4bf;
  --accent-deep: #14b8a6;
  --text-accent: #fb7185;
  --text-accent-deep: #f43f5e;
  --line: rgba(232, 238, 244, 0.1);
  --nav-bg: rgba(7, 11, 16, 0.78);
  --input-bg: rgba(10, 16, 24, 0.9);
  --ghost-hover: rgba(255, 255, 255, 0.06);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.35);
  --vision-bg: linear-gradient(145deg, #0a121c 0%, #122433 55%, #0d3d38 120%);
  --bg-glow-a: rgba(45, 212, 191, 0.14);
  --bg-glow-b: rgba(56, 120, 180, 0.12);
  --bg-base: linear-gradient(165deg, #070b10 0%, #0c1420 55%, #0a1018 100%);
  --grid: rgba(232, 238, 244, 0.045);
  --err: #f87171;
  --ok: #2dd4bf;
  color-scheme: dark;
}

html[data-theme="light"] {
  --ink: #0c1620;
  --muted: #5a6b7a;
  --paper: #eef2f6;
  --panel: #ffffff;
  --accent: #0d7a6f;
  --accent-deep: #095a52;
  --text-accent: #e11d48;
  --text-accent-deep: #be123c;
  --line: rgba(12, 22, 32, 0.1);
  --nav-bg: rgba(238, 242, 246, 0.82);
  --input-bg: #f8fafc;
  --ghost-hover: rgba(255, 255, 255, 0.7);
  --shadow: 0 18px 40px rgba(12, 22, 32, 0.08);
  --vision-bg: linear-gradient(145deg, #0c1620 0%, #143042 100%);
  --bg-glow-a: rgba(13, 122, 111, 0.16);
  --bg-glow-b: rgba(20, 60, 90, 0.12);
  --bg-base: linear-gradient(165deg, #f4f7fa 0%, #e7edf3 55%, #dfe8ef 100%);
  --grid: rgba(12, 22, 32, 0.04);
  --err: #a33;
  --ok: #095a52;
  color-scheme: light;
}

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

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  font-family: var(--font-body, "Manrope", "Segoe UI", sans-serif);
  --font-display: "Syne", "Segoe UI", sans-serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.55;
  transition: background 0.35s ease, color 0.35s ease;
}

.bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 520px at var(--glow-x, 12%) var(--glow-y, -8%), var(--bg-glow-a), transparent 55%),
    radial-gradient(700px 420px at calc(100% - var(--glow-x, 12%)) calc(40% + var(--glow-y, 0%)), var(--bg-glow-b), transparent 50%),
    var(--bg-base);
  transition: background 0.35s ease;
  will-change: background;
}

.bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.9;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  transform: translateY(var(--grid-shift, 0px));
  transition: transform 0.12s linear;
}

/* Soft scroll-progress line */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: var(--scroll-p, 0%);
  z-index: 40;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-deep));
  box-shadow: 0 0 12px rgba(45, 212, 191, 0.35);
  pointer-events: none;
  transition: width 0.08s linear;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--line);
  transition: background 0.35s ease, border-color 0.35s ease;
}

.site-nav .inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}

.brand span { color: var(--text-accent); }

.nav-links {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  font-size: 0.92rem;
  padding: 8px 12px;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover { color: var(--ink); background: rgba(45, 212, 191, 0.1); }
.nav-links a.active { color: var(--text-accent); background: rgba(244, 114, 182, 0.12); }

html[data-theme="light"] .nav-links a:hover { background: rgba(13, 122, 111, 0.08); }
html[data-theme="light"] .nav-links a.active {
  color: var(--text-accent-deep);
  background: rgba(225, 29, 72, 0.1);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 11px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  cursor: pointer;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  border-color: rgba(45, 212, 191, 0.4);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  display: none;
}

html[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
html[data-theme="light"] .theme-toggle .icon-moon { display: block; }

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 48px 24px 72px;
}

.hero {
  min-height: calc(100vh - 72px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 0 64px;
  max-width: 42rem;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 4.6rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.03em;
}

.hero h1 em {
  font-style: normal;
  color: var(--text-accent);
}

.hero .lede {
  margin-top: 18px;
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 34rem;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 18px;
  border-radius: 10px;
  border: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s ease, background 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: var(--accent);
  color: #041014;
  box-shadow: 0 10px 28px rgba(45, 212, 191, 0.22);
}
html[data-theme="light"] .btn-primary { color: #fff; box-shadow: 0 10px 24px rgba(13, 122, 111, 0.25); }
.btn-primary:hover { background: var(--accent-deep); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line);
}
.btn-ghost:hover { background: var(--ghost-hover); }

.section {
  padding: 56px 0;
  border-top: 1px solid var(--line);
}

.section h2 {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 4vw, 2.2rem);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section > p,
.prose {
  color: var(--muted);
  max-width: 40rem;
  font-size: 1.05rem;
}

.prose p + p { margin-top: 1rem; }
.prose strong { color: var(--text-accent); font-weight: 700; }

.services {
  margin-top: 28px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 28px;
  list-style: none;
}

.services li {
  padding: 14px 0;
  border-top: 1px solid var(--line);
  font-weight: 600;
}

.services li span {
  display: block;
  margin-top: 4px;
  font-weight: 500;
  color: var(--muted);
  font-size: 0.95rem;
}

.vision-box {
  margin-top: 28px;
  padding: 28px;
  background: var(--vision-bg);
  color: #e8eef4;
  border-radius: 16px;
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(45, 212, 191, 0.12);
}

.vision-box::before {
  content: "";
  position: absolute;
  width: 240px;
  height: 240px;
  right: -60px;
  top: -80px;
  border-radius: 50%;
  background: rgba(45, 212, 191, 0.28);
  animation: pulse 6s ease-in-out infinite;
}

.vision-box h3 {
  font-family: var(--font-display);
  font-size: 1.4rem;
  margin-bottom: 12px;
  position: relative;
}

.vision-box p {
  position: relative;
  color: rgba(232, 238, 244, 0.82);
  max-width: 40rem;
}

.vision-box .cta-row {
  margin-top: 20px;
  position: relative;
}

.page-head { margin-bottom: 36px; }

.page-head h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 6vw, 3.2rem);
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.page-head p {
  margin-top: 12px;
  color: var(--muted);
  max-width: 36rem;
}

.demo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.demo-link {
  display: flex;
  flex-direction: column;
  min-height: 240px;
  padding: 28px;
  text-decoration: none;
  color: inherit;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  backdrop-filter: blur(8px);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.demo-link:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: rgba(45, 212, 191, 0.4);
}

.demo-link .tag {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-accent);
  margin-bottom: 24px;
}

.demo-link h2 {
  font-family: var(--font-display);
  font-size: 1.7rem;
  margin-bottom: 10px;
}

.demo-link p {
  color: var(--muted);
  flex: 1;
}

.demo-link .cta {
  margin-top: 20px;
  font-weight: 700;
  color: var(--text-accent);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 36px;
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 14px;
  padding: 28px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  backdrop-filter: blur(8px);
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  font-size: 0.92rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  font: inherit;
  background: var(--input-bg);
  color: var(--ink);
  transition: border-color 0.2s ease, background 0.35s ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid rgba(45, 212, 191, 0.35);
  border-color: var(--accent);
}

.contact-form textarea { min-height: 140px; resize: vertical; }

.form-status {
  min-height: 1.4em;
  font-size: 0.95rem;
  color: var(--muted);
}

.form-status.ok { color: var(--ok); }
.form-status.err { color: var(--err); }

.aside-note { color: var(--muted); }

.aside-note h2 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--ink);
  margin-bottom: 10px;
}

.aside-note .demos-btn { margin-top: 24px; }

.foot {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  justify-content: space-between;
}

.foot a { color: var(--text-accent); text-decoration: none; }
.foot a:hover { text-decoration: underline; }

/* Scroll reveal – unaufdringlich */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  filter: blur(4px);
  transition:
    opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.7s cubic-bezier(0.22, 1, 0.36, 1),
    filter 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--d, 0ms);
}

.reveal.is-in {
  opacity: 1;
  transform: none;
  filter: none;
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    filter: none;
    transition: none;
  }
  .scroll-progress { display: none; }
  .bg::after { transition: none; }
  html { scroll-behavior: auto; }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 0.35; }
  50% { transform: scale(1.12); opacity: 0.5; }
}

@media (max-width: 800px) {
  .services,
  .demo-grid,
  .contact-layout { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 24px; }
  .site-nav .inner {
    flex-wrap: wrap;
  }
  .nav-right {
    width: 100%;
    justify-content: space-between;
  }
}