/* ENERIQON – Landingpage. Keine externen Ressourcen, keine Cookies, kein Tracking. */
@font-face { font-family: "Plus Jakarta Sans"; src: url("fonts/plus-jakarta-sans-500.woff2") format("woff2"); font-weight: 500; font-display: swap; }
@font-face { font-family: "Plus Jakarta Sans"; src: url("fonts/plus-jakarta-sans-700.woff2") format("woff2"); font-weight: 700; font-display: swap; }
@font-face { font-family: "Plus Jakarta Sans"; src: url("fonts/plus-jakarta-sans-800.woff2") format("woff2"); font-weight: 800; font-display: swap; }

/* Farben: Weiß ist Standard. Dunkel gibt es nur über den Schalter oben rechts (data-theme="dark"). */
:root {
  color-scheme: light;
  --paper: #FFFFFF;
  --ink: #0B1320;
  --ink-soft: #3D4654;
  --line: rgba(11, 19, 32, 0.10);
  --glass: rgba(255, 255, 255, 0.75);
  --glass-line: rgba(11, 19, 32, 0.08);
  --bg: radial-gradient(60rem 40rem at 95% -10%, rgba(147, 197, 253, 0.28), transparent 65%),
        linear-gradient(180deg, #FFFFFF 0%, #F5F9FF 100%);
  --grid: rgba(11, 19, 32, 0.035);
  --green: #0E9F6E;
  --green-deep: #03704F;
  --grad: linear-gradient(120deg, #10B981 0%, #0E9F6E 45%, #0A7FA8 100%);
  --glow: rgba(16, 185, 129, 0.30);
  --focus: #10B981;
  --shadow: 0 10px 30px -14px rgba(11, 19, 32, 0.18);
  --on-grad: #FFFFFF;
  --todo-bg: #FFF4C2;
  --todo-ink: #5A4500;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --paper: #0A1322;
  --ink: #EEF2F0;
  --ink-soft: #AEB8C2;
  --line: rgba(255, 255, 255, 0.10);
  --glass: rgba(20, 34, 58, 0.55);
  --glass-line: rgba(255, 255, 255, 0.09);
  --bg: linear-gradient(165deg, #0A1322 0%, #0D1E38 40%, #16346A 75%, #2A5BA8 120%);
  --grid: rgba(255, 255, 255, 0.04);
  --green: #3FE0A5;
  --green-deep: #3FE0A5;
  --grad: linear-gradient(120deg, #3FE0A5 0%, #10B981 45%, #38BDF8 100%);
  --glow: rgba(16, 185, 129, 0.40);
  --focus: #3FE0A5;
  --shadow: 0 14px 40px -16px rgba(0, 0, 0, 0.6);
  --on-grad: #04201A;
  --todo-bg: #4A3B00;
  --todo-ink: #FFE8A3;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-family: "Plus Jakarta Sans", "Segoe UI", system-ui, -apple-system, sans-serif;
  font-weight: 500;
  font-size: 1.0625rem;
  line-height: 1.6;
  position: relative;
  isolation: isolate;
}

/* Hintergrund: Farbverlauf (hell: Weiß mit leichtem Hellblau, dunkel: Dunkelblau ins Hellblaue) plus feines Raster, fest hinter dem Inhalt */
body::before, body::after { content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none; }
body::before { background: var(--bg); }
body::after {
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 30%, transparent 75%);
}

a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { color: var(--green-deep); }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - 2.5rem, 62rem); margin-inline: auto; }
.prose { max-width: 40rem; }

/* Glasfläche für Karten und Rechtstexte */
.panel, .topics > div {
  background: var(--glass);
  border: 1px solid var(--glass-line);
  border-radius: 20px;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}

/* Kopfzeile der Unterseiten */
.top { padding-block: 1.5rem; }
.top a { display: inline-flex; color: var(--ink); }
.top svg { width: 5.5rem; height: auto; }

/* Hero */
.hero { padding-block: clamp(3rem, 9vw, 6.5rem) clamp(3rem, 7vw, 5rem); }
.mark { display: block; width: clamp(11rem, 38vw, 20rem); height: auto; color: var(--ink); margin-bottom: clamp(1.75rem, 4vw, 2.5rem); filter: drop-shadow(0 18px 40px var(--glow)); }
.mark .bolt { transform-box: fill-box; transform-origin: center; animation: strike 700ms cubic-bezier(.16, 1, .3, 1) 200ms both; }
@keyframes strike { from { opacity: 0; transform: translate(-6%, -22%); } }
@media (prefers-reduced-motion: reduce) { .mark .bolt { animation: none; } }

.chip {
  display: inline-flex; align-items: center; gap: 0.5rem;
  margin: 0 0 1.25rem; padding: 0.35rem 0.85rem;
  font-size: 0.875rem; font-weight: 700; letter-spacing: 0.02em;
  color: var(--ink-soft);
  background: var(--glass); border: 1px solid var(--glass-line); border-radius: 999px;
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.chip::before { content: ""; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--grad); box-shadow: 0 0 10px var(--glow); }

h1 {
  font-weight: 800;
  font-size: clamp(2.25rem, 6.2vw, 4.5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 0 0 1.25rem;
  max-width: 15ch;
}
.accent {
  background: var(--grad);
  -webkit-background-clip: text; background-clip: text;
  color: transparent;
}
.lead { font-size: clamp(1.125rem, 2.2vw, 1.3125rem); color: var(--ink-soft); max-width: 36rem; margin: 0 0 2rem; }

.channels { display: flex; flex-wrap: wrap; gap: 0.75rem; margin: 0; padding: 0; list-style: none; }
.btn {
  display: inline-flex; align-items: center; gap: 0.6rem;
  min-height: 3rem; padding: 0.7rem 1.35rem;
  border-radius: 999px; border: 1px solid var(--glass-line);
  font-weight: 700; text-decoration: none;
  transition: transform 160ms cubic-bezier(.16, 1, .3, 1), box-shadow 160ms ease, border-color 160ms ease;
}
.btn-solid { background: var(--grad); color: var(--on-grad); border-color: transparent; box-shadow: 0 10px 28px -10px var(--glow); }
.btn-solid:hover { color: var(--on-grad); transform: translateY(-1px); box-shadow: 0 14px 34px -10px var(--glow); }
.btn-line { color: var(--ink); background: var(--glass); -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px); }
.btn-line:hover { color: var(--ink); border-color: var(--green); transform: translateY(-1px); }
@media (prefers-reduced-motion: reduce) { .btn { transition: none; } .btn:hover { transform: none; } }

/* Inhaltsabschnitte */
.section { padding-block: clamp(2.25rem, 5vw, 3.5rem); }
h2 { font-weight: 800; font-size: clamp(1.5rem, 3vw, 2rem); line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 1.5rem; }

.topics { display: grid; gap: 1rem; margin: 0; }
@media (min-width: 52rem) { .topics { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; } }
.topics > div { padding: 1.5rem 1.5rem 1.6rem; position: relative; overflow: hidden; }
.topics > div::before { content: ""; position: absolute; inset: 0 0 auto 0; height: 3px; background: var(--grad); }
.topics dt { font-weight: 800; font-size: 1.1875rem; margin-bottom: 0.5rem; }
.topics dd { margin: 0; color: var(--ink-soft); }

.principles { margin: 0; padding: 1.5rem 1.75rem; list-style: none; display: grid; gap: 1rem; max-width: 44rem; }
.principles li { padding-left: 1.6rem; position: relative; }
.principles li::before {
  content: ""; position: absolute; left: 0; top: 0.55em;
  width: 0.55rem; height: 0.55rem; border-radius: 2px; background: var(--grad); transform: rotate(45deg);
  box-shadow: 0 0 10px var(--glow);
}

.contact { padding: 1.75rem; max-width: 44rem; }
.contact p { margin: 0 0 0.75rem; }
.contact-mail { font-weight: 800; font-size: clamp(1.25rem, 3vw, 1.625rem); }
.note { color: var(--ink-soft); font-size: 0.9375rem; }

/* Rechtstexte */
.legal { padding-block: 0.5rem 4rem; }
.legal .panel { padding: clamp(1.5rem, 4vw, 2.75rem); max-width: 46rem; }
.legal h1 { font-size: clamp(2rem, 5vw, 3rem); max-width: none; margin-bottom: 2rem; }
.legal h2 { font-size: 1.3125rem; margin: 2.25rem 0 0.75rem; }
.legal h3 { font-size: 1.0625rem; font-weight: 800; margin: 1.75rem 0 0.5rem; }
.legal p, .legal ul { margin: 0 0 1rem; }
.legal ul { padding-left: 1.25rem; }
.legal address { font-style: normal; margin-bottom: 1rem; }
.todo { background: var(--todo-bg); color: var(--todo-ink); padding: 0.05em 0.3em; border-radius: 3px; }
.todo-box { background: var(--todo-bg); color: var(--todo-ink); padding: 1rem 1.25rem; border-radius: 12px; margin-bottom: 2rem; }

footer { border-top: 1px solid var(--line); padding-block: 2rem 2.5rem; font-size: 0.9375rem; color: var(--ink-soft); }
footer .wrap { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; align-items: center; justify-content: space-between; }
footer nav { display: flex; gap: 1.5rem; }
footer a { font-weight: 700; color: var(--ink); }

/* Hell/Dunkel-Schalter oben rechts */
.theme-toggle {
  position: fixed; top: 1rem; right: 1rem; z-index: 10;
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.75rem; height: 2.75rem; padding: 0;
  border-radius: 999px; border: 1px solid var(--glass-line);
  background: var(--glass); color: var(--ink); cursor: pointer;
  box-shadow: var(--shadow);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
}
.theme-toggle:hover { border-color: var(--green); }
.theme-toggle svg { width: 1.25rem; height: 1.25rem; }
.theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: none; }