/* SteuerLedger Landing Page — Dark Theme (EX3.20) */

:root {
    /* Dark backgrounds */
    --lp-bg:              #0F172A;
    --lp-bg-alt:          #1E293B;
    --lp-bg-darkest:      #0B1120;
    --lp-border:          #334155;

    /* Text on dark */
    --lp-text:            #F8FAFC;
    --lp-text-secondary:  #94A3B8;
    --lp-text-muted:      #64748B;

    /* Accent */
    --lp-accent:          #3B82F6;
    --lp-accent-hover:    #2563EB;

    /* Semantic */
    --lp-success:         #10B981;
    --lp-danger:          #EF4444;
    --lp-warning:         #F59E0B;

    /* Nav glass */
    --lp-nav-bg:          rgba(15, 23, 42, 0.85);

    /* Card */
    --lp-card-shadow:     0 2px 8px rgba(0, 0, 0, 0.3);

    /* Spacing */
    --spacing-xs:         4px;
    --spacing-sm:         8px;
    --spacing-md:         16px;
    --spacing-lg:         24px;
    --spacing-xl:         48px;

    /* Cards */
    --card-radius:        8px;
    --card-padding:       var(--spacing-lg);
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--lp-bg);
    color: var(--lp-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ---- Skip Link (a11y) ---- */
.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    background: var(--lp-accent);
    color: #fff;
    padding: 8px 16px;
    border-radius: var(--card-radius);
    z-index: 200;
    font-size: 14px;
}
.skip-link:focus {
    top: 8px;
}

/* ---- Navigation ---- */
.top-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--lp-nav-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    border-bottom: 1px solid var(--lp-border);
}

.nav-inner {
    max-width: 960px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: var(--lp-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

.brand-logo {
    height: 28px;
    width: auto;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-login {
    font-size: 14px;
    color: var(--lp-text-secondary);
    text-decoration: none;
    font-weight: 500;
}
.nav-login:hover {
    color: var(--lp-text);
}

.nav-cta {
    font-size: 14px;
    padding: 8px 16px;
    background: var(--lp-accent);
    color: #fff;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
}
.nav-cta:hover {
    background: var(--lp-accent-hover);
    text-decoration: none;
}

/* ---- Buttons ---- */
.btn {
    display: inline-block;
    padding: 14px 28px;
    border-radius: var(--card-radius);
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s;
    min-width: 44px;
    min-height: 44px;
    text-align: center;
    border: none;
}
.btn:focus-visible {
    outline: 2px solid var(--lp-accent);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--lp-accent);
    color: #fff;
}
.btn-primary:hover {
    background: var(--lp-accent-hover);
    text-decoration: none;
}

.btn-outline {
    background: transparent;
    color: var(--lp-text);
    border: 1px solid var(--lp-border);
}
.btn-outline:hover {
    border-color: var(--lp-accent);
    color: var(--lp-accent);
    text-decoration: none;
}

/* ---- Section 1: Hero ---- */
.hero {
    padding: 120px 0 60px;
    text-align: center;
    background: var(--lp-bg);
}

.hero h1 {
    font-size: 36px;
    font-weight: 800;
    color: var(--lp-text);
    margin-bottom: 16px;
    line-height: 1.15;
}

.hero-sub {
    font-size: 18px;
    color: var(--lp-text-secondary);
    margin-bottom: 12px;
    max-width: 560px;
    margin-left: auto;
    margin-right: auto;
}

.hero-micro {
    font-size: 15px;
    color: var(--lp-text-muted);
    font-style: italic;
    margin-bottom: 32px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.hero-ctas {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.hero-trust-bar {
    font-size: 13px;
    color: var(--lp-text-secondary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.3px;
}

.hero-link {
    display: inline-block;
    font-size: 14px;
    color: var(--lp-text-muted);
    text-decoration: none;
    margin-bottom: 40px;
    transition: color 0.2s;
}
.hero-link:hover {
    color: var(--lp-accent);
    text-decoration: none;
}

.hero-visual {
    max-width: 700px;
    margin: 0 auto;
}

.hero-video {
    border-radius: 12px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.hero-video video {
    width: 100%;
    display: block;
}

.hero-video::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(to bottom, transparent, var(--lp-bg));
    pointer-events: none;
}

/* ---- Section 2: CARF Problem ---- */
.carf-problem {
    padding: 80px 0;
    background: var(--lp-bg-alt);
}

.carf-problem h2 {
    font-size: 28px;
    color: var(--lp-text);
    text-align: center;
    margin-bottom: var(--spacing-md);
    line-height: 1.3;
}

.section-body {
    font-size: 17px;
    color: var(--lp-text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
}

.brutto-netto {
    display: flex;
    gap: 24px;
    align-items: stretch;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

.bn-card {
    flex: 1;
    max-width: 320px;
    background: var(--lp-bg);
    border: 1px solid var(--lp-border);
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.bn-card--danger { border-left: 3px solid var(--lp-danger); }
.bn-card--success { border-left: 3px solid var(--lp-success); }

.bn-label {
    font-size: 14px;
    font-weight: 600;
    color: var(--lp-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.bn-amount {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.1;
}
.bn-amount--danger { color: var(--lp-danger); }
.bn-amount--success { color: var(--lp-success); }

.bn-desc {
    font-size: 14px;
    color: var(--lp-text-muted);
}

.bn-vs {
    display: flex;
    align-items: center;
    font-size: 32px;
    font-weight: 800;
    color: var(--lp-text-muted);
    padding: 0 8px;
}

.section-explainer {
    font-size: 17px;
    color: var(--lp-text-secondary);
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.section-carf-note {
    font-size: 14px;
    color: var(--lp-text-muted);
    text-align: center;
    margin-top: var(--spacing-lg);
}

.carf-checklist {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 24px;
    margin: var(--spacing-md) auto var(--spacing-lg);
    max-width: 480px;
}

.carf-checklist li {
    font-size: 15px;
    color: var(--lp-text);
    font-weight: 500;
}
.carf-checklist li::before {
    content: "\2022 ";
    color: var(--lp-accent);
}

.haltefrist-hook {
    font-size: 17px;
    color: var(--lp-text);
    text-align: center;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--lp-border);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

/* ---- Section 3: Problem → Solution ---- */
.problem-solution {
    padding: 60px 0;
    background: var(--lp-bg);
    text-align: center;
}

.problem-solution h2 {
    font-size: 28px;
    color: var(--lp-text);
    margin-bottom: var(--spacing-md);
}

.problem-solution .section-body {
    font-size: 18px;
    max-width: 560px;
}

/* ---- Section 3: How It Works ---- */
.how-it-works {
    padding: 80px 0;
    background: var(--lp-bg);
}

.how-it-works h2 {
    font-size: 28px;
    color: var(--lp-text);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: 32px;
    margin-bottom: var(--spacing-xl);
}

.step {
    text-align: center;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--lp-accent);
    color: #fff;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.step h3 {
    font-size: 20px;
    color: var(--lp-text);
    margin-bottom: var(--spacing-sm);
}

.step p {
    font-size: 15px;
    color: var(--lp-text-secondary);
}

.section-begleit {
    font-size: 16px;
    color: var(--lp-text-secondary);
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

.section-tags {
    font-size: 17px;
    color: var(--lp-accent);
    text-align: center;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin: var(--spacing-sm) auto var(--spacing-lg);
}

/* ---- Section 4: Comparison ---- */
.comparison {
    padding: 80px 0;
    background: var(--lp-bg-alt);
}

.comparison h2 {
    font-size: 28px;
    color: var(--lp-text);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    line-height: 1.3;
}

.comparison-table-wrap {
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
    -webkit-overflow-scrolling: touch;
}

.comparison-table {
    border-collapse: collapse;
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
}

.comparison-table th,
.comparison-table td {
    padding: 14px 20px;
    text-align: left;
    border-bottom: 1px solid var(--lp-border);
    font-size: 15px;
}

.comparison-table th {
    color: var(--lp-text-muted);
    font-weight: 500;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.comparison-table td:first-child {
    font-weight: 600;
    color: var(--lp-text);
}

.comparison-table td:nth-child(2) {
    color: var(--lp-text-secondary);
}

.td-check {
    color: var(--lp-text);
}

.check {
    color: var(--lp-success);
    font-weight: 700;
    margin-left: 4px;
}

.comparison-table tbody tr:hover {
    background: rgba(59, 130, 246, 0.05);
}

.comparison-footnote {
    text-align: center;
    font-size: 13px;
    color: var(--lp-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* ---- Section 5: Trust / Features ---- */
.trust-features {
    padding: 80px 0;
    background: var(--lp-bg);
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.feature-card {
    background: var(--lp-bg-alt);
    border: 1px solid var(--lp-border);
    border-radius: 12px;
    padding: 32px;
}

.feature-icon {
    color: var(--lp-accent);
    margin-bottom: var(--spacing-md);
}

.feature-card h3 {
    font-size: 20px;
    color: var(--lp-text);
    margin-bottom: var(--spacing-sm);
}

.feature-card p {
    font-size: 15px;
    color: var(--lp-text-secondary);
    line-height: 1.6;
}

.exchange-list {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--lp-border);
}

.exchange-label {
    font-size: 13px;
    color: var(--lp-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--spacing-sm);
}

.exchange-names {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 16px;
}

.exchange-names span {
    font-size: 15px;
    color: var(--lp-text-secondary);
    font-weight: 500;
}

.exchange-more {
    color: var(--lp-text-muted) !important;
    font-style: italic;
    font-weight: 400 !important;
}

.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.trust-badge {
    font-size: 14px;
    color: var(--lp-text-secondary);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.trust-badge svg {
    flex-shrink: 0;
    color: var(--lp-text-muted);
}

/* ---- Social Proof ---- */
.social-proof {
    padding: 48px 0;
    background: var(--lp-bg-alt);
    border-bottom: 1px solid var(--lp-border);
}

.social-proof-bar {
    display: flex;
    justify-content: center;
    gap: 48px;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.proof-stat {
    text-align: center;
}

.proof-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--lp-text);
    font-variant-numeric: tabular-nums;
}

.proof-label {
    font-size: 13px;
    color: var(--lp-text-muted);
}

.proof-exchanges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 20px;
    font-size: 14px;
    color: var(--lp-text-secondary);
}

/* ---- Section 6: Pricing ---- */
.pricing {
    padding: 80px 0;
    background: var(--lp-bg-alt);
}

.pricing h2 {
    font-size: 28px;
    color: var(--lp-text);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.pricing-vat-note {
    text-align: center;
    color: var(--lp-text-muted);
    font-size: 0.85rem;
    margin-bottom: var(--spacing-xl);
}

.pricing-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto var(--spacing-xl);
}

.pricing-card {
    background: var(--lp-bg);
    border: 1px solid var(--lp-border);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    position: relative;
    display: flex;
    flex-direction: column;
}

.pricing-card h3 {
    font-size: 22px;
    color: var(--lp-text);
    margin-bottom: 12px;
}

.pricing-price {
    margin-bottom: var(--spacing-lg);
}

.pricing-amount {
    font-size: 36px;
    font-weight: 800;
    color: var(--lp-text);
}

.pricing-period {
    font-size: 15px;
    color: var(--lp-text-muted);
}

.pricing-features {
    list-style: none;
    text-align: left;
    margin-bottom: var(--spacing-lg);
    flex: 1;
}

.pricing-features li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--lp-text-secondary);
    border-bottom: 1px solid rgba(51, 65, 85, 0.3);
}

.pricing-features li:last-child {
    border-bottom: none;
}

.pricing-soon {
    display: inline-block;
    font-size: 11px;
    padding: 1px 6px;
    border-radius: 4px;
    background: rgba(59, 130, 246, 0.15);
    color: var(--lp-accent);
    font-weight: 600;
    vertical-align: middle;
    margin-left: 4px;
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--lp-accent);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 14px;
    border-radius: 20px;
    white-space: nowrap;
}

.pricing-card--highlight {
    border-color: var(--lp-accent);
    border-width: 2px;
}

/* ---- Testimonials ---- */
.testimonials {
    padding: 60px 0;
    background: var(--lp-bg);
}

.testimonial-cards {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--lp-bg-alt);
    border: 1px solid var(--lp-border);
    border-radius: 12px;
    padding: 24px 28px;
}

.testimonial-text {
    font-size: 15px;
    color: var(--lp-text);
    line-height: 1.6;
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.testimonial-author {
    font-size: 13px;
    color: var(--lp-text-muted);
}

/* ---- Section 7: Steuerberater CTA ---- */
.steuerberater {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--lp-bg) 0%, var(--lp-bg-alt) 100%);
    text-align: center;
}

.steuerberater h2 {
    font-size: 28px;
    color: var(--lp-text);
    margin-bottom: var(--spacing-md);
}

.steuerberater-copy {
    font-size: 17px;
    color: var(--lp-text-secondary);
    max-width: 560px;
    margin: 0 auto var(--spacing-lg);
    line-height: 1.6;
}

/* ---- Section 9: FAQ ---- */
.faq {
    padding: 80px 0;
    background: var(--lp-bg-alt);
}

.faq h2 {
    font-size: 28px;
    color: var(--lp-text);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.faq-item {
    border-bottom: 1px solid var(--lp-border);
    max-width: 700px;
    margin: 0 auto;
}

.faq-item summary {
    padding: 20px 0;
    font-size: 17px;
    color: var(--lp-text);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 44px;
}

.faq-item summary::after {
    content: "+";
    font-size: 20px;
    color: var(--lp-accent);
    flex-shrink: 0;
    margin-left: 16px;
}

.faq-item[open] summary::after {
    content: "\2212";
}

.faq-item p {
    padding: 0 0 20px;
    font-size: 15px;
    color: var(--lp-text-secondary);
    line-height: 1.6;
}

/* ---- Section 10: Final CTA ---- */
.final-cta {
    padding: 80px 0;
    text-align: center;
    background: var(--lp-bg);
}

.final-cta h2 {
    font-size: 28px;
    color: var(--lp-text);
    margin-bottom: var(--spacing-lg);
    line-height: 1.3;
}

.btn-large {
    padding: 18px 36px;
    font-size: 18px;
}

/* ---- Footer ---- */
.site-footer {
    padding: 48px 0 32px;
    background: var(--lp-bg-darkest);
    border-top: 1px solid var(--lp-border);
}

.footer-disclaimer {
    max-width: 640px;
    margin: 0 auto var(--spacing-lg);
}

.footer-disclaimer p {
    font-size: 13px;
    color: var(--lp-text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
}
.footer-disclaimer p:last-child {
    margin-bottom: 0;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.footer-links a {
    font-size: 14px;
    color: var(--lp-text-muted);
}
.footer-links a:hover {
    color: var(--lp-accent);
}

.footer-copy {
    text-align: center;
    font-size: 12px;
    color: var(--lp-text-muted);
}

/* ---- Legal Pages (preserved from original) ---- */
.legal-page {
    padding: 100px 0 60px;
    background: var(--lp-bg);
}

.legal-page h1 {
    font-size: 28px;
    color: var(--lp-text);
    margin-bottom: 8px;
}

.legal-page h2 {
    font-size: 18px;
    color: var(--lp-text);
    margin-top: 32px;
    margin-bottom: 8px;
}

.legal-page p {
    font-size: 15px;
    color: var(--lp-text-secondary);
    margin-bottom: 8px;
    line-height: 1.6;
}

.legal-page ul {
    margin: 8px 0 16px 20px;
    color: var(--lp-text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

.legal-page li {
    margin-bottom: 4px;
}

.legal-page a {
    color: var(--lp-accent);
}

.legal-page em {
    color: var(--lp-text-muted);
    font-size: 14px;
}

/* ---- Responsive: Mobile (<600px) ---- */
@media (max-width: 599px) {
    .hero h1 {
        font-size: 28px;
    }

    .hero-sub {
        font-size: 16px;
    }

    .hero-micro {
        font-size: 14px;
    }

    .brutto-netto {
        flex-direction: column;
        align-items: center;
    }

    .bn-card {
        max-width: 100%;
        width: 100%;
    }

    .bn-vs {
        transform: rotate(90deg);
        padding: 4px 0;
    }

    .bn-amount {
        font-size: 28px;
    }

    .trust-badges {
        justify-content: flex-start;
    }

    .trust-badge {
        white-space: normal;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 10px 12px;
        font-size: 14px;
    }

    .carf-problem h2,
    .problem-solution h2,
    .how-it-works h2,
    .comparison h2,
    .pricing h2,
    .steuerberater h2 {
        font-size: 24px;
    }

    .btn {
        padding: 12px 20px;
        font-size: 15px;
    }
}

/* ---- Responsive: Tablet (600px) ---- */
@media (min-width: 600px) {
    .feature-grid {
        grid-template-columns: 1fr 1fr;
    }

    .pricing-cards--three {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonial-cards {
        grid-template-columns: repeat(3, 1fr);
    }

    .steps {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

/* ---- Responsive: Desktop (960px) ---- */
@media (min-width: 960px) {
    .hero h1 {
        font-size: 48px;
    }

    .hero-sub {
        font-size: 20px;
    }

    .carf-problem h2,
    .problem-solution h2,
    .how-it-works h2,
    .comparison h2,
    .pricing h2,
    .steuerberater h2,
    .faq h2,
    .final-cta h2 {
        font-size: 36px;
    }
}

/* ---- EX4.31: Intersection Observer Entrance ---- */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
                transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    .reveal {
        opacity: 1;
        transform: none;
    }
}