/* ==========================================================================
   Vendparts — style.css (Version 3)
   Digitale Produktorientierung für Payment und Wasserfiltration
   ========================================================================== */

/* ---------- Design Tokens ---------- */
:root {
  /* Light (Standard) */
  --c-bg: #faf9f6;
  --c-bg-alt: #f2efe9;
  --c-surface: #ffffff;
  --c-surface-2: #f5f3ee;
  --c-border: rgba(30, 27, 23, 0.1);
  --c-border-strong: rgba(30, 27, 23, 0.18);
  --c-text: #211d19;
  --c-text-secondary: #625b51;
  --c-text-tertiary: #928a7c;
  --c-on-accent: #ffffff;

  /* Themenfarben */
  --c-espresso: #5c3c28;
  --c-espresso-soft: rgba(92, 60, 40, 0.1);
  --c-copper: #ad6b3f;
  --c-copper-soft: rgba(173, 107, 63, 0.12);
  --c-amber: #c68a3f;
  --c-amber-soft: rgba(198, 138, 63, 0.12);
  --c-water: #29749e;
  --c-water-soft: rgba(41, 116, 158, 0.1);
  --c-digital: #5c7488;
  --c-digital-soft: rgba(92, 116, 136, 0.1);

  /* Primärakzent (Espresso/Kupfer) */
  --c-accent: var(--c-copper);
  --c-accent-2: var(--c-espresso);
  --c-accent-soft: var(--c-copper-soft);

  --shadow-soft: 0 24px 60px rgba(30, 27, 23, 0.1);
  --shadow-card: 0 10px 26px rgba(30, 27, 23, 0.06);

  --font-base: "Avenir Next", Avenir, "Segoe UI", "Helvetica Neue", Helvetica,
    Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, Consolas, monospace;

  --fs-hero: clamp(2.2rem, 5vw, 3.9rem);
  --fs-h1: clamp(2rem, 4vw, 2.9rem);
  --fs-h2: clamp(1.6rem, 3vw, 2.2rem);
  --fs-h3: clamp(1.15rem, 1.8vw, 1.4rem);
  --fs-lead: clamp(1.02rem, 1.5vw, 1.2rem);
  --fs-body: 1rem;
  --fs-small: 0.875rem;
  --fs-micro: 0.75rem;

  --radius-s: 8px;
  --radius-m: 12px;
  --radius-l: 18px;
  --radius-xl: 26px;

  --space-xs: 0.5rem;
  --space-s: 1rem;
  --space-m: 1.75rem;
  --space-l: 3rem;
  --space-xl: 5rem;
  --space-xxl: 7rem;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-fast: 0.2s;
  --dur-med: 0.5s;

  --max-width: 1180px;

  color-scheme: light;
}

[data-theme="dark"] {
  --c-bg: #1b1815;
  --c-bg-alt: #221e1a;
  --c-surface: #262220;
  --c-surface-2: #2c2723;
  --c-border: rgba(250, 245, 238, 0.1);
  --c-border-strong: rgba(250, 245, 238, 0.18);
  --c-text: #f2ede4;
  --c-text-secondary: #b7ab9c;
  --c-text-tertiary: #8a8072;

  --c-espresso: #c99a72;
  --c-espresso-soft: rgba(201, 154, 114, 0.14);
  --c-copper: #d69a63;
  --c-copper-soft: rgba(214, 154, 99, 0.16);
  --c-amber: #dba85c;
  --c-amber-soft: rgba(219, 168, 92, 0.16);
  --c-water: #74b3d6;
  --c-water-soft: rgba(116, 179, 214, 0.16);
  --c-digital: #93aec2;
  --c-digital-soft: rgba(147, 174, 194, 0.14);

  --c-accent: var(--c-copper);
  --c-accent-2: var(--c-espresso);
  --c-accent-soft: var(--c-copper-soft);

  --shadow-soft: 0 24px 60px rgba(0, 0, 0, 0.42);
  --shadow-card: 0 10px 26px rgba(0, 0, 0, 0.3);
  color-scheme: dark;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--c-bg);
  color: var(--c-text);
  font-family: var(--font-base);
  font-weight: 400;
  font-size: var(--fs-body);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--dur-med) var(--ease-out), color var(--dur-med) var(--ease-out);
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }

h1, h2, h3, h4 {
  font-family: var(--font-base);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.16;
  margin: 0;
}

p { margin: 0; }

.tabular { font-variant-numeric: tabular-nums; letter-spacing: 0; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 4vw, 2.5rem);
}

a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--c-accent-2);
  outline-offset: 3px;
  border-radius: 6px;
}

::selection { background: var(--c-accent-soft); color: var(--c-text); }

.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--c-accent); color: var(--c-on-accent);
  padding: 0.75em 1.2em; border-radius: 0 0 8px 0; z-index: 2000;
}
.skip-link:focus { left: 0; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- Utility ---------- */
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--c-accent-2); margin-bottom: var(--space-s); font-weight: 600;
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-accent); box-shadow: 0 0 0 4px var(--c-accent-soft);
}
.eyebrow.water { color: var(--c-water); }
.eyebrow.water::before { background: var(--c-water); box-shadow: 0 0 0 4px var(--c-water-soft); }

.section { padding: var(--space-xxl) 0; position: relative; }
.section-head { max-width: 660px; margin-bottom: var(--space-l); }
.section-head.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-head p { color: var(--c-text-secondary); font-size: var(--fs-lead); margin-top: var(--space-s); }
.section-alt { background: var(--c-bg-alt); border-top: 1px solid var(--c-border); border-bottom: 1px solid var(--c-border); }

.section-dark {
  background: var(--c-text);
  color: var(--c-bg);
}
[data-theme="dark"] .section-dark { background: #0f0d0b; }
.section-dark .eyebrow { color: var(--c-amber); }
.section-dark .eyebrow::before { background: var(--c-amber); box-shadow: 0 0 0 4px rgba(198,138,63,0.25); }
.section-dark h2 { color: #fff; }
.section-dark .big-statement { font-size: clamp(1.4rem, 2.6vw, 2rem); max-width: 820px; color: rgba(255,255,255,0.92); font-weight: 500; }
.section-dark .statement-list { margin-top: var(--space-l); display: flex; flex-direction: column; gap: 1rem; }
.section-dark .statement-item {
  border-left: 2px solid var(--c-amber);
  padding: 0.2rem 0 0.2rem 1.1rem;
  font-size: 1.05rem;
  color: rgba(255,255,255,0.78);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5em;
  padding: 0.85em 1.6em; border-radius: var(--radius-s);
  font-weight: 600; font-size: 0.95rem; letter-spacing: -0.005em;
  min-height: 44px;
  transition: transform var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out), box-shadow var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:disabled:hover { transform: none; }

.btn-primary {
  background: var(--c-espresso); color: #fff;
  box-shadow: 0 8px 22px rgba(92, 60, 40, 0.22);
}
.btn-primary:hover { background: var(--c-copper); }

.btn-outline {
  background: transparent; color: var(--c-text);
  border: 1px solid var(--c-border-strong);
}
.btn-outline:hover { border-color: var(--c-accent-2); color: var(--c-accent-2); }

.btn-water { background: var(--c-water); color: #fff; box-shadow: 0 8px 22px rgba(41,116,158,0.22); }
.btn-water:hover { background: #1f5c7d; }

/* Slide Button: color sweep on hover/focus */
.btn-slide-fx {
  position: relative;
  overflow: hidden;
  z-index: 0;
}
.btn-slide-fx::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--c-accent-2);
  transform: translateX(-102%);
  transition: transform var(--dur-med) var(--ease-out);
  z-index: -1;
}
.btn-slide-fx:hover::before, .btn-slide-fx:focus-visible::before { transform: translateX(0); }
.btn-slide-fx .arrow { display: inline-flex; transition: transform var(--dur-fast) var(--ease-out); }
.btn-slide-fx:hover .arrow, .btn-slide-fx:focus-visible .arrow { transform: translateX(3px); }
.btn-slide-fx.water::before { background: #1f5c7d; }

.text-link {
  position: relative; font-weight: 600; font-size: 0.95rem;
  color: var(--c-text); padding-bottom: 2px;
  background-image: linear-gradient(var(--c-accent-2), var(--c-accent-2));
  background-repeat: no-repeat; background-position: 0 100%; background-size: 0% 1.5px;
  transition: background-size var(--dur-fast) var(--ease-out);
}
.text-link:hover { background-size: 100% 1.5px; }

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: 0.85rem 0;
  background: color-mix(in srgb, var(--c-bg) 55%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  -webkit-backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-med) var(--ease-out), padding var(--dur-med) var(--ease-out),
    background-color var(--dur-med) var(--ease-out);
}
.site-header.scrolled {
  border-bottom-color: var(--c-border);
  padding: 0.55rem 0;
  background: color-mix(in srgb, var(--c-bg) 85%, transparent);
}

.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: var(--space-m); }

.logo { font-weight: 700; font-size: 1.18rem; letter-spacing: -0.02em; display: inline-flex; }
.logo .vend { color: var(--c-text); }
.logo .parts { color: var(--c-accent-2); }

.main-nav { display: flex; align-items: center; gap: var(--space-l); }
.nav-links { display: flex; gap: 1.6rem; }
.nav-links a {
  font-size: 0.9rem; color: var(--c-text-secondary); position: relative; padding: 0.3rem 0.1rem;
  transition: color var(--dur-fast) var(--ease-out);
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--c-text); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px; height: 1.5px;
  background: var(--c-accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-fast) var(--ease-out);
}
.nav-links a:hover::after, .nav-links a[aria-current="page"]::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: var(--space-s); }

.theme-toggle {
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--c-border-strong); background: var(--c-surface);
  display: inline-flex; align-items: center; justify-content: center;
  transition: border-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--c-accent-2); }
.theme-toggle:active { transform: scale(0.92) rotate(20deg); }
.theme-toggle svg { width: 19px; height: 19px; stroke: var(--c-text); }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Nav slide button */
.btn-slide {
  position: relative; overflow: hidden;
  padding: 0.8em 1.5em 0.8em 1.05em; border-radius: var(--radius-s);
  background: var(--c-espresso); color: #fff;
  font-weight: 600; font-size: 0.9rem; min-height: 44px;
  display: inline-flex; align-items: center; gap: 0.6em;
  transition: background-color var(--dur-fast) var(--ease-out);
}
.btn-slide:hover { background: var(--c-copper); }
.btn-slide .slide-dot {
  width: 24px; height: 24px; border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: inline-flex; align-items: center; justify-content: center;
  transition: transform var(--dur-fast) var(--ease-out);
}
.btn-slide .slide-dot svg { width: 12px; height: 12px; stroke: #fff; }
.btn-slide:hover .slide-dot { transform: translateX(3px); }

.nav-toggle {
  display: none; width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid var(--c-border-strong); background: var(--c-surface);
  align-items: center; justify-content: center; flex-direction: column; gap: 4px;
}
.nav-toggle span { width: 18px; height: 1.5px; background: var(--c-text); transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.5px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.5px) rotate(-45deg); }

/* Scroll progress bar */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px;
  background: linear-gradient(90deg, var(--c-copper), var(--c-water));
  width: 0%; z-index: 110; transition: width 0.1s linear;
}

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: center; padding-top: 6rem; overflow: hidden; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(48% 42% at 84% 12%, var(--c-water-soft), transparent 60%),
    radial-gradient(44% 38% at 6% 88%, var(--c-espresso-soft), transparent 60%);
}
.hero .container {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: var(--space-l); align-items: center;
}

.hero-copy .eyebrow { color: var(--c-text-secondary); }
.hero-copy .eyebrow::before { background: var(--c-accent); }
.hero-copy h1 { font-size: var(--fs-hero); }
.hero-copy .lead { margin-top: var(--space-m); font-size: var(--fs-lead); color: var(--c-text-secondary); max-width: 50ch; }
.hero-copy .lead-small { margin-top: 0.6rem; font-size: 0.92rem; color: var(--c-text-tertiary); letter-spacing: 0.02em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: var(--space-l); align-items: center; }

/* Hero load animation stages */
.hero-anim > * { opacity: 0; transform: translateY(16px); transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out); }
.hero-anim.is-ready > * { opacity: 1; transform: translateY(0); }
.hero-anim.is-ready .stage-1 { transition-delay: 0.05s; }
.hero-anim.is-ready .stage-2 { transition-delay: 0.2s; }
.hero-anim.is-ready .stage-3 { transition-delay: 0.35s; }
.hero-anim.is-ready .stage-4 { transition-delay: 0.5s; }

@media (prefers-reduced-motion: reduce) {
  .hero-anim > * { opacity: 1 !important; transform: none !important; transition: none !important; }
}

/* Hero visual: Automat + Payment + Filter */
.hero-visual { position: relative; max-width: 460px; justify-self: center; width: 100%; }
.hero-visual svg { width: 100%; height: auto; overflow: visible; }
.hv-body { fill: var(--c-surface); stroke: var(--c-border-strong); stroke-width: 1.3; }
.hv-block { fill: var(--c-surface-2); stroke: var(--c-border); stroke-width: 1; }
.hv-label { font-family: var(--font-mono); font-size: 7.5px; fill: var(--c-text-secondary); }
.hv-pay-line {
  fill: none; stroke: var(--c-copper); stroke-width: 1.5;
  stroke-dasharray: 4 7; animation: hv-dash 3s linear infinite;
}
.hv-water-line {
  fill: none; stroke: var(--c-water); stroke-width: 1.5;
  stroke-dasharray: 4 7; animation: hv-dash 3.4s linear infinite;
}
@keyframes hv-dash { to { stroke-dashoffset: -110; } }
.hv-dot { fill: var(--c-copper); }
.hv-dot.water { fill: var(--c-water); }
.hv-pulse { fill: none; stroke: var(--c-copper); stroke-width: 1; opacity: 0; transform-origin: center; animation: hv-pulse 3s var(--ease-out) infinite; }
.hv-pulse.water { stroke: var(--c-water); }
@keyframes hv-pulse { 0% { opacity: 0.5; transform: scale(0.7); } 100% { opacity: 0; transform: scale(2); } }

/* Scroll-Reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.75s var(--ease-out), transform 0.75s var(--ease-out); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-stagger.is-visible > * { transition-delay: calc(var(--i, 0) * 85ms); }

/* ---------- Hauptauswahl (zwei Produktwelten) ---------- */
.choice-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1.75rem; }

.choice-panel {
  position: relative;
  border-radius: var(--radius-xl);
  padding: var(--space-l) var(--space-m) var(--space-m);
  overflow: hidden;
  border: 1px solid var(--c-border);
  transition: transform var(--dur-fast) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
  display: flex; flex-direction: column;
}
.choice-panel:hover { transform: translateY(-4px); }

.choice-panel.payment { background: linear-gradient(165deg, var(--c-surface), var(--c-espresso-soft)); }
.choice-panel.water { background: linear-gradient(165deg, var(--c-surface), var(--c-water-soft)); }

.choice-visual { height: 150px; margin-bottom: var(--space-m); position: relative; }
.choice-visual svg { width: 100%; height: 100%; }

.choice-panel h3 { font-size: 1.5rem; margin-bottom: 0.6rem; }
.choice-panel > p.desc { color: var(--c-text-secondary); margin-bottom: var(--space-s); }

.choice-criteria { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--space-m); }
.choice-criteria span {
  font-size: 0.78rem; color: var(--c-text-secondary);
  border: 1px solid var(--c-border); border-radius: 100px; padding: 0.35em 0.8em;
  background: var(--c-surface);
}

.choice-panel .btn { margin-top: auto; align-self: flex-start; }

/* ---------- Slide-to-Start Regler ---------- */
.slide-unlock {
  position: relative;
  width: 100%; max-width: 420px;
  height: 58px;
  border-radius: var(--radius-s);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-strong);
  overflow: hidden;
  touch-action: none;
  user-select: none;
}
.slide-unlock .su-track-fill {
  position: absolute; top: 0; left: 0; bottom: 0;
  width: 0%;
  background: linear-gradient(90deg, var(--c-copper-soft), var(--c-copper));
  transition: width 0.05s linear;
}
.slide-unlock .su-label {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 600; color: var(--c-text-secondary);
  pointer-events: none;
  letter-spacing: 0.01em;
}
.slide-unlock .su-handle {
  position: absolute; top: 3px; left: 3px;
  width: 52px; height: 52px;
  border-radius: calc(var(--radius-s) - 3px);
  background: var(--c-espresso);
  display: flex; align-items: center; justify-content: center;
  cursor: grab;
  transition: left 0.25s var(--ease-out), background-color var(--dur-fast) var(--ease-out);
  z-index: 2;
}
.slide-unlock .su-handle:active { cursor: grabbing; }
.slide-unlock .su-handle svg { width: 20px; height: 20px; stroke: #fff; }
.slide-unlock.is-complete .su-handle { background: #3a7d4f; }
.slide-unlock.is-complete .su-label { color: #fff; }
.slide-unlock.water .su-track-fill { background: linear-gradient(90deg, var(--c-water-soft), var(--c-water)); }
.slide-unlock.water .su-handle { background: var(--c-water); }
.slide-unlock:focus-within { outline: 2px solid var(--c-accent-2); outline-offset: 3px; }

.slide-unlock-fallback { margin-top: 0.7rem; font-size: 0.85rem; }

/* ---------- Arbeitsweise / Prozess ---------- */
.process-steps {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.25rem; margin-top: var(--space-l);
}
.process-step {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-m);
  padding: var(--space-m);
}
.process-step .num {
  width: 32px; height: 32px; border-radius: 50%;
  background: var(--c-accent-soft); color: var(--c-accent-2);
  font-family: var(--font-mono); font-weight: 700; font-size: 0.9rem;
  display: flex; align-items: center; justify-content: center; margin-bottom: 0.8rem;
}
.process-step p { font-size: 0.92rem; color: var(--c-text-secondary); }

/* ---------- Calculator lock overlay (öffentliche Ansicht gesperrt) ---------- */
.calc-lock-wrap { position: relative; }
.calc-shell.is-locked {
  filter: grayscale(1) opacity(0.5);
  pointer-events: none;
  user-select: none;
}
.calc-lock-overlay {
  position: absolute; inset: 0; z-index: 5;
  display: flex; align-items: center; justify-content: center;
  padding: var(--space-m);
}
.calc-lock-panel {
  background: var(--c-surface); border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-l); padding: var(--space-l);
  text-align: center; max-width: 420px; box-shadow: var(--shadow-soft);
}
.calc-lock-panel h3 { font-size: 1.2rem; margin: 0.5rem 0 0.6rem; }
.calc-lock-panel p.lock-text { color: var(--c-text-secondary); margin-bottom: var(--space-m); font-size: 0.95rem; }

/* ---------- Calculator layout (Payment) ---------- */
.calc-shell {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-xl);
  background: var(--c-surface);
  overflow: hidden;
  box-shadow: var(--shadow-card);
}
.calc-grid { display: grid; grid-template-columns: 1fr 1.15fr; }
.calc-inputs { padding: var(--space-l); border-right: 1px solid var(--c-border); }
.calc-results { padding: var(--space-l); background: var(--c-surface-2); }

.calc-inputs h3, .calc-results h3 { font-size: 1.1rem; margin-bottom: var(--space-m); }

.field-group { margin-bottom: var(--space-m); }
.field-group label { display: block; font-size: 0.88rem; font-weight: 600; margin-bottom: 0.4rem; }
.field-group .hint { font-size: 0.78rem; color: var(--c-text-tertiary); margin-top: 0.35rem; }

.field-input {
  width: 100%; min-height: 46px;
  border: 1px solid var(--c-border-strong); border-radius: var(--radius-s);
  background: var(--c-bg); color: var(--c-text);
  padding: 0.6em 0.9em; font-size: 1rem; font-family: var(--font-base);
  font-variant-numeric: tabular-nums;
}
.field-input:focus { border-color: var(--c-accent-2); }

.scenario-row { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: var(--space-m); }
.scenario-btn {
  font-size: 0.82rem; padding: 0.5em 1em; border-radius: 100px;
  border: 1px solid var(--c-border-strong); background: var(--c-surface);
  min-height: 44px;
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.scenario-btn:hover, .scenario-btn.active { border-color: var(--c-accent-2); background: var(--c-accent-soft); }
.scenario-note { font-size: 0.76rem; color: var(--c-text-tertiary); margin-bottom: var(--space-m); }

.warning-box {
  display: none;
  background: var(--c-amber-soft); border: 1px solid var(--c-amber);
  border-radius: var(--radius-s); padding: 0.75em 1em; font-size: 0.85rem;
  color: var(--c-text); margin-bottom: var(--space-m);
}
.warning-box.is-visible { display: block; }

/* Bar chart (kein externes Chart-Framework) */
.bar-chart { display: flex; flex-direction: column; gap: 0.6rem; margin-bottom: var(--space-m); }
.bar-row { display: flex; align-items: center; gap: 0.7rem; }
.bar-name { width: 110px; flex-shrink: 0; font-size: 0.82rem; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.bar-bg { flex: 1; height: 24px; background: var(--c-border); border-radius: 5px; overflow: hidden; }
.bar-fill { height: 100%; border-radius: 5px; display: flex; align-items: center; padding-left: 8px; font-size: 0.7rem; font-weight: 700; color: #fff; transition: width 0.6s var(--ease-out); }
.bar-fill.best { background: linear-gradient(90deg, var(--c-espresso), var(--c-copper)); }
.bar-fill.other { background: var(--c-text-tertiary); }
.bar-eur { width: 64px; text-align: right; font-size: 0.8rem; color: var(--c-text-secondary); flex-shrink: 0; }

.result-cards { display: grid; grid-template-columns: 1fr 1fr; gap: 0.9rem; margin-bottom: var(--space-m); }
.result-card {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-m);
  padding: var(--space-m); position: relative;
}
.result-card.best { border-color: var(--c-copper); border-width: 2px; }
.result-card .badge {
  position: absolute; top: -10px; right: 14px;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.04em; text-transform: uppercase;
  background: var(--c-espresso); color: #fff; border-radius: 100px; padding: 0.3em 0.8em;
}
.result-card .badge.rank { background: var(--c-text-tertiary); }
.result-card .card-name { font-weight: 700; margin-bottom: 0.3rem; }
.result-card .card-total { font-size: 1.5rem; font-weight: 700; }
.result-card .card-total span { font-size: 0.75rem; font-weight: 500; color: var(--c-text-tertiary); }
.result-card .card-rate { font-size: 0.8rem; color: var(--c-text-secondary); margin-top: 0.2rem; }
.result-card .detail-row { display: flex; justify-content: space-between; font-size: 0.8rem; color: var(--c-text-secondary); padding: 0.25rem 0; border-top: 1px solid var(--c-border); }
.result-card .detail-row:first-of-type { border-top: none; margin-top: 0.6rem; }
.result-card .detail-row .val { color: var(--c-text); font-weight: 600; }

.summary-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.7rem; margin-bottom: var(--space-m);
}
.summary-item {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-m);
  padding: 0.9rem;
}
.summary-item .label { font-size: 0.72rem; color: var(--c-text-tertiary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.3rem; }
.summary-item .value { font-size: 1.15rem; font-weight: 700; }
.summary-item .value.count-up { transition: none; }

.explain-box {
  background: var(--c-surface); border-left: 3px solid var(--c-copper);
  border-radius: var(--radius-m); padding: var(--space-m); font-size: 0.92rem; color: var(--c-text-secondary);
}
.explain-box p + p { margin-top: 0.5rem; }

.legal-notice {
  max-width: 900px; margin: var(--space-l) auto 0;
  background: var(--c-surface); border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-m); padding: var(--space-m);
}
.legal-notice p { color: var(--c-text-secondary); font-size: 0.9rem; margin-bottom: 0.5rem; }
.legal-notice p:last-child { margin-bottom: 0; }

/* ---------- Wasserfilter-Berater (Wizard) ---------- */
.wizard-shell {
  border: 1px solid var(--c-border); border-radius: var(--radius-xl);
  background: var(--c-surface); box-shadow: var(--shadow-card); overflow: hidden;
}
.wizard-grid { display: grid; grid-template-columns: 1fr 0.85fr; }
.wizard-main { padding: var(--space-l); border-right: 1px solid var(--c-border); }
.wizard-sidebar { padding: var(--space-l); background: var(--c-surface-2); }

.wizard-progress { margin-bottom: var(--space-l); }
.wizard-progress-track { height: 6px; border-radius: 4px; background: var(--c-border); overflow: hidden; }
.wizard-progress-fill { height: 100%; background: var(--c-water); width: 16.6%; transition: width 0.4s var(--ease-out); border-radius: 4px; }
.wizard-progress-label { display: flex; justify-content: space-between; margin-top: 0.5rem; font-size: 0.78rem; color: var(--c-text-tertiary); font-family: var(--font-mono); }

.wizard-step { display: none; }
.wizard-step.is-active { display: block; }

.wizard-step h3 { font-size: 1.25rem; margin-bottom: 0.4rem; }
.wizard-step .step-hint { color: var(--c-text-secondary); font-size: 0.92rem; margin-bottom: var(--space-m); }

.option-grid { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: var(--space-m); }
.option-chip {
  padding: 0.6em 1.1em; border-radius: 100px; font-size: 0.86rem;
  border: 1px solid var(--c-border-strong); background: var(--c-surface);
  min-height: 44px; display: inline-flex; align-items: center;
  transition: border-color var(--dur-fast) var(--ease-out), background-color var(--dur-fast) var(--ease-out);
}
.option-chip[aria-pressed="true"] { border-color: var(--c-water); background: var(--c-water-soft); color: var(--c-water); font-weight: 600; }

.wizard-field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: var(--space-m); }
.wizard-field-row .field-group { margin-bottom: 0; }

.wizard-nav { display: flex; justify-content: space-between; gap: 1rem; margin-top: var(--space-l); }

.help-note {
  font-size: 0.85rem; color: var(--c-text-tertiary);
  background: var(--c-surface-2); border-radius: var(--radius-s);
  padding: 0.6em 0.9em; margin-top: 0.4rem;
}

.water-flow { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: var(--space-l); }
.flow-station {
  display: flex; align-items: center; gap: 0.6rem;
  font-size: 0.84rem; color: var(--c-text-tertiary);
  padding: 0.4rem 0; opacity: 0.5; transition: opacity var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.flow-station .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--c-border-strong); flex-shrink: 0; transition: background-color var(--dur-fast) var(--ease-out); }
.flow-station.is-active { opacity: 1; color: var(--c-text); }
.flow-station.is-active .dot { background: var(--c-water); box-shadow: 0 0 0 4px var(--c-water-soft); }

.wizard-summary-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 0.8rem; }
.summary-list { display: flex; flex-direction: column; gap: 0.5rem; font-size: 0.85rem; }
.summary-list .row { display: flex; justify-content: space-between; gap: 0.5rem; color: var(--c-text-secondary); }
.summary-list .row .v { color: var(--c-text); font-weight: 600; text-align: right; }

.result-profile { display: none; }
.result-profile.is-active { display: block; }
.profile-lead { font-size: 1.02rem; color: var(--c-text); margin-bottom: var(--space-m); background: var(--c-water-soft); border-left: 3px solid var(--c-water); padding: var(--space-m); border-radius: var(--radius-m); }

.profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.8rem; margin-bottom: var(--space-m); }
.profile-item { background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-m); padding: 0.9rem; }
.profile-item .label { font-size: 0.72rem; color: var(--c-text-tertiary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.3rem; }
.profile-item .value { font-size: 0.98rem; font-weight: 600; }

.open-points { background: var(--c-amber-soft); border: 1px solid var(--c-amber); border-radius: var(--radius-m); padding: var(--space-m); margin-bottom: var(--space-m); }
.open-points h4 { font-size: 0.9rem; margin-bottom: 0.5rem; }
.open-points ul { list-style: disc; padding-left: 1.2rem; }
.open-points li { font-size: 0.86rem; color: var(--c-text-secondary); margin-bottom: 0.3rem; }

/* Vergleichstabelle (Vorbereitung) */
.compare-table-wrap { overflow-x: auto; border: 1px solid var(--c-border); border-radius: var(--radius-m); }
table.compare-table { width: 100%; border-collapse: collapse; min-width: 640px; }
table.compare-table th, table.compare-table td {
  text-align: left; padding: 0.7em 1em; font-size: 0.86rem; border-bottom: 1px solid var(--c-border);
  white-space: nowrap;
}
table.compare-table th { background: var(--c-surface-2); font-weight: 700; }
table.compare-table td.placeholder { color: var(--c-text-tertiary); font-style: italic; }

.status-preview {
  display: inline-flex; align-items: center; gap: 0.4em;
  font-family: var(--font-mono); font-size: var(--fs-micro);
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--c-text-tertiary); border: 1px solid var(--c-border); border-radius: 100px;
  padding: 0.35em 0.85em; margin-bottom: var(--space-s);
}

/* ---------- Wissen ---------- */
.knowledge-cats { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
.knowledge-cat h3 { font-size: 1.2rem; margin-bottom: var(--space-s); display: flex; align-items: center; gap: 0.5em; }
.knowledge-cat h3 .dot { width: 10px; height: 10px; border-radius: 50%; }
.knowledge-cat.payment h3 .dot { background: var(--c-copper); }
.knowledge-cat.water h3 .dot { background: var(--c-water); }

.knowledge-list { display: flex; flex-direction: column; gap: 0.7rem; }
.knowledge-item {
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-m);
  padding: 0.9rem 1.1rem; display: flex; justify-content: space-between; align-items: center; gap: 1rem;
}
.knowledge-item span.title { font-size: 0.92rem; }
.knowledge-item span.badge {
  font-family: var(--font-mono); font-size: 0.66rem; text-transform: uppercase; letter-spacing: 0.05em;
  color: var(--c-text-tertiary); border: 1px solid var(--c-border); border-radius: 100px; padding: 0.3em 0.7em;
  flex-shrink: 0;
}

/* ---------- Kontakt ---------- */
.contact-panel {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: var(--space-l); align-items: start;
  background: var(--c-surface); border: 1px solid var(--c-border); border-radius: var(--radius-xl); padding: var(--space-l);
}
.contact-panel h2 { font-size: var(--fs-h2); margin-bottom: var(--space-s); }
.contact-panel p { color: var(--c-text-secondary); }
.contact-side { border-left: 1px solid var(--c-border); padding-left: var(--space-l); }
.contact-hint { margin-top: var(--space-m); font-size: var(--fs-small); color: var(--c-text-tertiary); }
.mail-preview {
  background: var(--c-surface-2); border: 1px solid var(--c-border); border-radius: var(--radius-m);
  padding: var(--space-m); font-family: var(--font-mono); font-size: 0.8rem; color: var(--c-text-secondary);
  white-space: pre-wrap; margin: var(--space-m) 0;
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 90;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--c-surface); border: 1px solid var(--c-border-strong);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-card);
  opacity: 0; pointer-events: none; transform: translateY(10px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.back-to-top.is-visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top svg { width: 18px; height: 18px; stroke: var(--c-text); }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--c-border); padding: var(--space-l) 0 var(--space-m); background: var(--c-bg-alt); }
.footer-top { display: grid; grid-template-columns: 1.3fr repeat(2, 0.85fr); gap: var(--space-l); padding-bottom: var(--space-l); }
.footer-brand .logo { font-size: 1.15rem; }
.footer-brand p { margin-top: 0.75rem; color: var(--c-text-secondary); font-size: 0.9rem; max-width: 34ch; }
.footer-col h4 { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--c-text-tertiary); margin-bottom: var(--space-s); font-family: var(--font-mono); font-weight: 500; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { color: var(--c-text-secondary); font-size: 0.89rem; transition: color var(--dur-fast) var(--ease-out); }
.footer-col a:hover { color: var(--c-accent-2); }
.footer-bottom { border-top: 1px solid var(--c-border); padding-top: var(--space-m); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; font-size: 0.82rem; color: var(--c-text-tertiary); }

/* ---------- Static pages ---------- */
.legal-page { padding-top: 8.5rem; padding-bottom: var(--space-xxl); }
.legal-page .container { max-width: 780px; }
.legal-page h1 { font-size: var(--fs-h1); margin-bottom: var(--space-s); }
.legal-page .legal-intro { color: var(--c-text-secondary); font-size: var(--fs-lead); margin-bottom: var(--space-l); }
.legal-block { margin-bottom: var(--space-l); }
.legal-block h2 { font-size: 1.2rem; margin-bottom: 0.9rem; }
.legal-block p, .legal-block li { color: var(--c-text-secondary); margin-bottom: 0.6rem; }
.legal-block ul { padding-left: 1.1rem; list-style: disc; }
.legal-block address { font-style: normal; color: var(--c-text); line-height: 1.7; }
.legal-block a.mail { color: var(--c-accent-2); text-decoration: underline; text-underline-offset: 3px; }
.todo-flag {
  display: inline-block; font-family: var(--font-mono); font-size: 0.78rem;
  color: #b3402c; background: rgba(179, 64, 44, 0.08); border: 1px solid rgba(179, 64, 44, 0.28);
  border-radius: 8px; padding: 0.5em 0.8em; margin: 0.4em 0;
}
[data-theme="dark"] .todo-flag { color: #e0876f; background: rgba(224,135,111,0.1); border-color: rgba(224,135,111,0.32); }
.draft-banner {
  background: rgba(179, 64, 44, 0.06); border: 1px solid rgba(179, 64, 44, 0.22);
  border-radius: var(--radius-m); padding: var(--space-m); margin-bottom: var(--space-l);
  font-size: 0.92rem; color: var(--c-text-secondary);
}
[data-theme="dark"] .draft-banner { background: rgba(224,135,111,0.08); border-color: rgba(224,135,111,0.26); }
.draft-banner strong { color: var(--c-text); }
.back-link { display: inline-flex; align-items: center; gap: 0.4em; color: var(--c-text-secondary); font-size: 0.9rem; margin-bottom: var(--space-l); }
.back-link:hover { color: var(--c-accent-2); }

/* ---------- aria-live status ---------- */
.status-live { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .calc-grid, .wizard-grid { grid-template-columns: 1fr; }
  .calc-inputs, .wizard-main { border-right: none; border-bottom: 1px solid var(--c-border); }
  .summary-strip { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 980px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero-visual { order: -1; max-width: 340px; margin: 0 auto var(--space-m); }
  .choice-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; row-gap: var(--space-l); }
  .contact-panel { grid-template-columns: 1fr; }
  .contact-side { border-left: none; padding-left: 0; border-top: 1px solid var(--c-border); padding-top: var(--space-m); }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .knowledge-cats { grid-template-columns: 1fr; }
  .result-cards { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .main-nav {
    position: fixed; top: 66px; left: 1rem; right: 1rem;
    background: var(--c-surface); border: 1px solid var(--c-border-strong);
    border-radius: var(--radius-m); flex-direction: column; align-items: stretch;
    padding: var(--space-s); box-shadow: var(--shadow-soft);
    gap: 0; transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: transform var(--dur-fast) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
    max-height: 75vh; overflow-y: auto;
  }
  .main-nav.is-open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links { flex-direction: column; gap: 0; }
  .nav-links a { padding: 0.85rem 0.6rem; border-bottom: 1px solid var(--c-border); }
  .nav-links a::after { display: none; }
  .header-actions .btn-slide { display: none; }
  .main-nav .btn-slide { display: inline-flex; margin: 0.75rem 0.6rem 0.4rem; justify-content: center; }
  .nav-toggle { display: inline-flex; }
  .footer-top { grid-template-columns: 1fr; }
  .wizard-field-row { grid-template-columns: 1fr; }
  .summary-strip { grid-template-columns: 1fr 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  table.compare-table { min-width: 560px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important; scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}