/**
 * Verwaltung Nachhilfe – Operations Studio Design System
 * Ink + Teal + Amber · Fraunces + Plus Jakarta Sans
 */

:root {
    --vn-ink: #0B1220;
    --vn-ink-soft: #151D2E;
    --vn-canvas: #F4F7F6;
    --vn-canvas-soft: #EEF3F1;
    --vn-teal: #0D9488;
    --vn-teal-dark: #0F766E;
    --vn-amber: #F59E0B;
    --vn-amber-dark: #D97706;
    --vn-mute: #5B677A;
    --vn-line: rgba(11, 18, 32, 0.10);
    --vn-text: #0B1220;
    --vn-radius: 1.15rem;
    --vn-radius-sm: 0.75rem;
    --vn-shadow: 0 24px 60px -28px rgba(11, 18, 32, 0.45);
    --vn-font-sans: "Plus Jakarta Sans", system-ui, sans-serif;
    --vn-font-display: Fraunces, Georgia, serif;
    --vn-funnel-h: 4.25rem;

    /* Legacy aliases */
    --primary: #0D9488;
    --secondary: #0F766E;
    --text: #0B1220;
    --text-light: #5B677A;
    --bg-light: #F4F7F6;
    --border: #e2e8f0;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    --radius-md: 0.75rem;
    --radius-lg: 1.15rem;
    --transition: all 0.2s ease;
    --vn-primary-50: #F0FDFA;
    --vn-primary-600: #0D9488;
    --vn-primary-700: #0F766E;
    --vn-accent-500: #F59E0B;
    --vn-footer-bg: #0B1220;
    --vn-text-muted: #5B677A;
    --vn-border: rgba(11, 18, 32, 0.10);
    --vn-radius-lg: 1.15rem;
    --vn-radius-xl: 1.35rem;
    --vn-shadow-card: 0 10px 30px -16px rgba(11, 18, 32, 0.18);
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--vn-font-sans);
    color: var(--vn-text);
    background: var(--vn-canvas);
    -webkit-font-smoothing: antialiased;
    padding-bottom: var(--vn-funnel-h);
}

body.vn-no-funnel { padding-bottom: 0; }

h1, h2, h3, .font-display { font-family: var(--vn-font-display); }

.vn-gradient-text {
    background: linear-gradient(120deg, #0D9488 0%, #0F766E 45%, #D97706 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.vn-hero-studio {
    position: relative;
    background:
        radial-gradient(900px 520px at 85% -10%, rgba(13,148,136,.18), transparent 55%),
        radial-gradient(700px 420px at 0% 100%, rgba(245,158,11,.12), transparent 50%),
        linear-gradient(165deg, #0B1220 0%, #151D2E 55%, #0B1220 100%);
    color: #fff;
}

.vn-hero-studio::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(180deg, #000 20%, transparent 90%);
    pointer-events: none;
}

.vn-section { padding: 4.5rem 0; }
.vn-section-tight { padding: 3rem 0; }
.vn-container { width: min(1120px, calc(100% - 2rem)); margin-inline: auto; }

.vn-btn-primary,
.vn-btn-secondary,
.vn-btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    border-radius: .9rem;
    font-weight: 700;
    font-size: .95rem;
    padding: .9rem 1.35rem;
    transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    text-decoration: none;
}

.vn-btn-primary {
    background: var(--vn-amber);
    color: var(--vn-ink);
    box-shadow: 0 12px 28px -10px rgba(245,158,11,.55);
}
.vn-btn-primary:hover { background: #FBBF24; transform: translateY(-1px); }

.vn-btn-secondary {
    background: rgba(255,255,255,.08);
    color: #fff;
    border: 1px solid rgba(255,255,255,.22);
}
.vn-btn-secondary:hover { background: rgba(255,255,255,.14); }

.vn-btn-ghost {
    background: #fff;
    color: var(--vn-ink);
    border: 1px solid var(--vn-line);
}
.vn-btn-ghost:hover { border-color: rgba(13,148,136,.35); color: var(--vn-teal-dark); }

.vn-btn-teal {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    border-radius: .9rem;
    font-weight: 700;
    padding: .9rem 1.35rem;
    background: var(--vn-teal);
    color: #fff;
    text-decoration: none;
    transition: background .2s ease, transform .2s ease;
}
.vn-btn-teal:hover { background: var(--vn-teal-dark); transform: translateY(-1px); }

.vn-nav-glass {
    background: rgba(244,247,246,.88);
    backdrop-filter: saturate(160%) blur(14px);
    -webkit-backdrop-filter: saturate(160%) blur(14px);
    border-bottom: 1px solid var(--vn-line);
}

.vn-nav-link {
    color: var(--vn-mute);
    font-weight: 600;
    font-size: .9rem;
}
.vn-nav-link:hover,
.vn-nav-link.is-active {
    color: var(--vn-ink);
}

.vn-product-frame {
    border-radius: 1.25rem;
    background: linear-gradient(180deg, rgba(255,255,255,.12), rgba(255,255,255,.04));
    border: 1px solid rgba(255,255,255,.14);
    box-shadow: var(--vn-shadow);
    overflow: hidden;
}

.vn-product-chrome {
    display: flex;
    align-items: center;
    gap: .4rem;
    padding: .75rem 1rem;
    background: rgba(0,0,0,.25);
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.vn-product-chrome i {
    width: .55rem; height: .55rem; border-radius: 999px; display: block;
    background: rgba(255,255,255,.25);
}
.vn-product-chrome i:nth-child(1) { background: #F87171; }
.vn-product-chrome i:nth-child(2) { background: #FBBF24; }
.vn-product-chrome i:nth-child(3) { background: #34D399; }

.vn-panel {
    background: #fff;
    border: 1px solid var(--vn-line);
    border-radius: var(--vn-radius);
    box-shadow: var(--vn-shadow-card);
}

.vn-stat {
    text-align: center;
    padding: 1.25rem;
}
.vn-stat strong {
    display: block;
    font-family: var(--vn-font-display);
    font-size: 2rem;
    color: var(--vn-ink);
    line-height: 1.1;
}
.vn-stat span { color: var(--vn-mute); font-size: .875rem; font-weight: 600; }

.vn-step-tabs { display: flex; flex-wrap: wrap; gap: .5rem; }
.vn-step-tab {
    border: 1px solid var(--vn-line);
    background: #fff;
    border-radius: 999px;
    padding: .55rem 1rem;
    font-weight: 700;
    font-size: .85rem;
    color: var(--vn-mute);
    cursor: pointer;
}
.vn-step-tab[aria-selected="true"] {
    background: var(--vn-ink);
    color: #fff;
    border-color: var(--vn-ink);
}
.vn-step-panel[hidden] { display: none !important; }

.vn-roi {
    background: #fff;
    border: 1px solid var(--vn-line);
    border-radius: var(--vn-radius);
    padding: 1.5rem;
}
.vn-roi input[type="range"] { width: 100%; accent-color: var(--vn-teal); }
.vn-roi-result {
    margin-top: 1rem;
    padding: 1rem 1.15rem;
    border-radius: .9rem;
    background: linear-gradient(135deg, rgba(13,148,136,.1), rgba(245,158,11,.12));
    font-weight: 700;
}

.vn-funnel-bar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 60;
    background: rgba(11,18,32,.94);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(255,255,255,.08);
    transform: translateY(110%);
    transition: transform .35s ease;
}
.vn-funnel-bar.is-visible { transform: translateY(0); }
.vn-funnel-inner {
    width: min(1120px, calc(100% - 1.5rem));
    margin: 0 auto;
    min-height: var(--vn-funnel-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: .75rem;
    padding: .65rem 0;
}
.vn-funnel-copy { color: rgba(255,255,255,.78); font-size: .85rem; font-weight: 600; }
.vn-funnel-actions { display: flex; gap: .5rem; flex-shrink: 0; }
.vn-funnel-actions .vn-btn-primary,
.vn-funnel-actions .vn-btn-secondary { padding: .7rem 1rem; font-size: .85rem; }

.vn-soft-cta {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity .4s ease, transform .4s ease;
    pointer-events: none;
}
.vn-soft-cta.is-visible {
    opacity: 1;
    transform: none;
    pointer-events: auto;
}

@media (prefers-reduced-motion: no-preference) {
    .reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in, .reveal.is-visible { opacity: 1; transform: none; }
}

.skip-link { position: absolute; left: -9999px; }
.skip-link:focus {
    left: 1rem; top: 1rem; z-index: 100;
    background: var(--vn-teal); color: #fff;
    padding: .5rem 1rem; border-radius: .5rem;
}

/* Legal / handbook compatibility */
.vn-page-hero {
    padding: 7rem 0 3rem;
    background:
        radial-gradient(700px 400px at 90% 0%, rgba(13,148,136,.12), transparent 55%),
        linear-gradient(180deg, #fff 0%, var(--vn-canvas) 100%);
}
.vn-page-hero h1 {
    font-family: var(--vn-font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    margin: 0 0 .75rem;
}
.vn-page-hero p { color: var(--vn-mute); max-width: 40rem; margin: 0; }
.vn-legal-wrap {
    width: min(820px, calc(100% - 2rem));
    margin: 0 auto 4rem;
    background: #fff;
    border: 1px solid var(--vn-line);
    border-radius: var(--vn-radius);
    padding: 2rem;
}
.vn-legal-wrap h2 { font-family: var(--vn-font-display); margin-top: 1.75rem; }
.vn-legal-wrap a { color: var(--vn-teal-dark); font-weight: 600; }

footer.vn-footer a:hover { color: #fff; }

@media (max-width: 640px) {
    .vn-funnel-copy { display: none; }
    .vn-funnel-actions { width: 100%; }
    .vn-funnel-actions a { flex: 1; }
}