/* ============================================
   Kesselberg Chronik — Light Mode
   ============================================ */

:root {
    /* Warm off-white background, dark ink text */
    --bg: #f4f3ef;
    --bg-elevated: #ffffff;
    --bg-card: #ffffff;
    --bg-card-hover: #f4f3ef;
    --text: #1a1916;
    --text-secondary: #4a4740;
    --text-muted: #716e68;
    --accent: #c9281c;              /* deeper red — 4.6:1 on white, 5.4:1 on --bg */
    --accent-soft: rgba(201, 40, 28, 0.07);
    --accent-glow: rgba(201, 40, 28, 0.22);
    --border: #e0ddd6;
    --radius: 12px;
    --radius-sm: 8px;
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Bebas Neue', 'Inter', sans-serif;
    --max-width: 1100px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }

/* ---- Navigation ---- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0 24px;
    transition: background var(--transition), backdrop-filter var(--transition);
}
.nav--scrolled {
    background: rgba(244, 243, 239, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}
.nav__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.nav__logo {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text);
}
.nav__logo span {
    color: var(--accent);
}
.nav__links {
    display: flex;
    gap: 32px;
}
.nav__links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}
.nav__links a:hover { color: var(--text); }

.nav__burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}
.nav__burger span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    z-index: 99;
    background: rgba(244, 243, 239, 0.98);
    backdrop-filter: blur(20px);
    padding: 24px;
    display: none;
    flex-direction: column;
    gap: 20px;
    border-bottom: 1px solid var(--border);
}
.mobile-menu.is-open { display: flex; }
.mobile-menu a {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ---- Hero ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}
.hero__bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 50% 0%, var(--accent-soft) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 80% 20%, rgba(201, 40, 28, 0.04) 0%, transparent 60%);
    pointer-events: none;
}
.hero__content {
    position: relative;
    max-width: 800px;
    text-align: center;
}
.hero__label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: 24px;
    opacity: 0;
    animation: fadeUp 0.8s 0.2s ease forwards;
}
.hero__title {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 10vw, 7rem);
    font-weight: 400;
    line-height: 1.0;
    letter-spacing: 0.01em;
    color: var(--text);
    margin-bottom: 28px;
    opacity: 0;
    animation: fadeUp 0.8s 0.4s ease forwards;
}
.hero__highlight {
    color: var(--accent);
}
.hero__subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto 40px;
    line-height: 1.7;
    opacity: 0;
    animation: fadeUp 0.8s 0.6s ease forwards;
}
.hero__subtitle strong {
    color: var(--text);
    font-weight: 700;
}

/* Hero: noise overlay */
.hero__noise {
    position: absolute;
    inset: 0;
    opacity: 0.035;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-size: 200px 200px;
}

/* Hero: CTA */
.hero__cta {
    display: inline-block;
    padding: 14px 36px;
    background: var(--accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.95rem;
    border-radius: 100px;
    transition: transform var(--transition), box-shadow var(--transition);
    opacity: 0;
    animation: fadeUp 0.8s 0.8s ease forwards;
}
.hero__cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow);
}

/* ---- Stats ---- */
.stats {
    padding: 80px 24px;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    text-align: center;
    max-width: var(--max-width);
    margin: 0 auto;
}
.stat__number {
    display: block;
    font-family: var(--font-display);
    font-size: clamp(2.8rem, 5.5vw, 4.8rem);
    font-weight: 400;
    letter-spacing: 0.01em;
    line-height: 1;
    color: var(--text);
    margin-bottom: 10px;
}
.stat__prefix,
.stat__suffix {
    font-size: 0.6em;
    font-weight: 400;
    vertical-align: middle;
    color: var(--text-muted);
}
.stat__label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 600;
}
.stat__sub {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.stats__source {
    text-align: center;
    margin-top: 48px;
    font-size: 0.75rem;
    color: var(--text-secondary);
    max-width: var(--max-width);
    margin-left: auto;
    margin-right: auto;
}

/* ---- Breakdown Bars ---- */
.breakdown {
    padding: 80px 24px;
}
.breakdown__inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 4vw, 3rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-bottom: 40px;
    color: var(--text);
}
.breakdown__desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    max-width: 640px;
    margin-bottom: 32px;
}
.breakdown__bars {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.bar {
    display: grid;
    grid-template-columns: 60px 1fr 40px;
    align-items: center;
    gap: 16px;
    padding: 10px 0;
    transition: var(--transition);
    border-radius: var(--radius-sm);
}
.bar:hover {
    background: var(--bg-card-hover);
    padding-left: 12px;
    padding-right: 12px;
}
.bar--active {
    background: var(--accent-soft);
    padding-left: 12px;
    padding-right: 12px;
}
.bar__year {
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-secondary);
}
.bar--active .bar__year { color: var(--accent); }
.bar__fill {
    height: 8px;
    background: var(--border);
    border-radius: 100px;
    overflow: hidden;
}
.bar__fill-inner {
    height: 100%;
    width: var(--bar-pct);
    background: var(--accent);
    border-radius: 100px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}
.bar.is-visible .bar__fill-inner {
    transform: scaleX(1);
}
.bar__count {
    font-weight: 800;
    font-size: 1.1rem;
    text-align: right;
    color: var(--text);
}

/* ---- Chronik / Articles ---- */
.chronik {
    padding: 80px 24px 120px;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border);
}
.chronik__inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.chronik__header {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 40px;
}
.chronik__filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.filter-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 100px;
    background: var(--bg);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    transition: var(--transition);
    cursor: pointer;
}
.filter-btn:hover {
    color: var(--text);
    border-color: var(--text-muted);
}
.filter-btn--active {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}

/* Year Divider */
.articles__year-divider {
    padding: 40px 0 16px;
}
.articles__year-divider span {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    padding-bottom: 8px;
    border-bottom: 2px solid var(--accent);
}
.articles__year-divider:first-child { padding-top: 0; }

/* Article Cards */
.articles {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.card {
    padding: 24px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.card:hover {
    background: var(--bg-card);
    transform: translateX(4px);
    box-shadow: 0 4px 20px rgba(26, 25, 22, 0.07);
}
.card__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
    font-size: 0.8rem;
}
.card__date {
    color: var(--text);
    font-weight: 600;
}
.card__ago {
    color: var(--text-secondary);
}
.card__title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 6px;
    color: var(--text);
}
.card__title a {
    display: inline;
    transition: color var(--transition);
}
.card__title a:hover { color: var(--accent); }
.card__arrow {
    display: inline-block;
    margin-left: 6px;
    vertical-align: middle;
    opacity: 0;
    transform: translate(-4px, 4px);
    transition: var(--transition);
}
.card:hover .card__arrow {
    opacity: 1;
    transform: translate(0, 0);
}
.card__excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.articles__empty {
    text-align: center;
    padding: 60px 24px;
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* ---- Reveal Animation ---- */
[data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Footer ---- */
.footer {
    padding: 60px 24px 40px;
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
}
.footer__inner {
    max-width: var(--max-width);
    margin: 0 auto;
}
.footer__top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 40px;
    margin-bottom: 40px;
}
.footer__brand p {
    margin-top: 12px;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.6;
}
.footer__impressum {
    text-align: right;
}
.footer__impressum-title {
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.footer__impressum p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.7;
}
.footer__impressum a {
    color: var(--text-secondary);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
}
.footer__bottom {
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.footer__bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ---- Keyframes ---- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ---- Responsive ---- */
@media (max-width: 768px) {
    .nav__links { display: none; }
    .nav__burger { display: flex; }

    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .chronik__header {
        flex-direction: column;
    }
    .chronik__filters {
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
    }
    .filter-btn { white-space: nowrap; }

    .bar {
        grid-template-columns: 50px 1fr 35px;
        gap: 10px;
    }

    .footer__top {
        flex-direction: column;
    }
    .footer__impressum {
        text-align: left;
    }

    .hero__title { font-size: 3rem; }
}

@media (max-width: 480px) {
    .card { padding: 18px 16px; }
    .card__title { font-size: 1rem; }
    .hero { padding-top: 100px; }
}