/* CSS Reset & Basis Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* CSS Custom Properties (Variablen) */
:root {
    /* Farben */
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #3b82f6;
    --accent-green: #10b981;
    --accent-orange: #f59e0b;
    --text-dark: #1f2937;
    --text-light: #ffffff;
    --text-muted: #6b7280;
    --background: #ffffff;
    --surface: #f9fafb;
    --surface-hover: #f3f4f6;
    --border: #e5e7eb;
    --border-dark: #d1d5db;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.15);
    --shadow-strong: rgba(0, 0, 0, 0.25);
    /* Abstände */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    /* Container */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-sm);
}

/* Body & Typography */
body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--background);
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--text-dark);
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
}

/* ==================== */
/* HERO + LOGO          */
/* ==================== */
.hero {
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, var(--primary-blue) 100%);
    color: var(--text-light);
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

.hero__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero__logo {
    margin-bottom: var(--spacing-sm);
}

    .hero__logo a {
        text-decoration: none;
    }

/* Logo – direkt invertieren */
.logo {
    display: block;
    height: 100px;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
}

.hero__title,
.hero__subtitle {
    color: var(--text-light);
}

.hero__subtitle {
    opacity: .9;
}

/* ==================== */
/* BANNER SECTION - KORRIGIERT */
/* ==================== */
.banner {
    background: linear-gradient(135deg, var(--accent-orange) 0%, #fb923c 100%);
    padding: var(--spacing-lg) 0;
    margin: var(--spacing-lg) 0;
}

    .banner .container {
        max-width: var(--container-max-width);
        padding: 0 var(--container-padding);
    }

.banner__grid {
    display: grid;
    gap: var(--spacing-sm);
    width: 100%;
    margin: 0 auto;
}

/* Banner Content Container - KORRIGIERT */
.banner__content {
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    width: 100%;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    overflow: hidden;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    /* Korrigiertes Seitenverhältnis für 600x100px */
    aspect-ratio: 6 / 1;
    min-height: 0;
}

/* Banner Bild - KORRIGIERT */
.banner__img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain; /* WICHTIG: contain statt cover - zeigt komplettes Bild */
    object-position: center;
    transition: opacity 0.3s ease;
}

    .banner__img.is-fade-out {
        opacity: 0;
    }

.banner__link {
    display: block;
    width: 100%;
    height: 100%;
    text-decoration: none;
}

.banner__placeholder {
    background: rgba(255, 255, 255, 0.2);
    border: 2px dashed rgba(255, 255, 255, 0.5);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    width: 100%;
    max-width: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.banner__text {
    color: var(--text-light);
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    opacity: 0.8;
}

/* ==================== */
/* SECTIONS             */
/* ==================== */
.modules-section,
.shop-section,
.content-section {
    padding: var(--spacing-xl) 0;
}

.modules-section--future {
    background: var(--surface);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--text-dark);
    position: relative;
}

    .section-title::after {
        content: '';
        position: absolute;
        bottom: -12px;
        left: 50%;
        transform: translateX(-50%);
        width: 60px;
        height: 3px;
        background: linear-gradient(90deg, var(--primary-blue) 0%, var(--accent-green) 100%);
        border-radius: var(--radius-sm);
    }

/* Grids */
.modules-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.shop-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-lg);
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

/* Cards */
.card {
    background: var(--background);
    border-radius: var(--radius-xl);
    box-shadow: 0 4px 6px var(--shadow);
    transition: all 0.3s ease;
    overflow: hidden;
    border: 1px solid var(--border);
}

    .card:hover {
        transform: translateY(-4px);
        box-shadow: 0 12px 28px var(--shadow-hover);
        border-color: var(--border-dark);
    }

.card--module {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-light) 100%);
    color: var(--text-light);
    padding: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    min-height: 300px;
    border: none;
}

    .card--module:hover {
        background: linear-gradient(135deg, var(--primary-blue-dark) 0%, var(--primary-blue) 100%);
    }

    .card--module.card--disabled {
        background: linear-gradient(135deg, #9ca3af 0%, #d1d5db 100%);
        opacity: 0.7;
        cursor: not-allowed;
        transform: none !important;
    }

        .card--module.card--disabled:hover {
            transform: none;
            box-shadow: 0 4px 6px var(--shadow);
            background: linear-gradient(135deg, #9ca3af 0%, #d1d5db 100%);
        }

.card--shop {
    padding: 0;
    transition: all 0.3s ease;
}

    .card--shop:hover {
        transform: translateY(-2px);
    }

.card__link {
    display: block;
    text-decoration: none;
    color: inherit;
    height: 100%;
}

.card__icon {
    margin-bottom: var(--spacing-md);
    color: var(--text-light);
    display: flex;
    justify-content: center;
    align-items: center;
}

.card__image {
    width: 100%;
    height: 140px;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    font-weight: 500;
}

.card__content {
    padding: var(--spacing-md);
}

.card__title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: inherit;
}

.card--module .card__title {
    color: var(--text-light);
}

.card__description {
    flex-grow: 1;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    line-height: 1.5;
}

.card--module .card__description {
    color: var(--text-light);
}

.card__button {
    margin-top: auto;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 28px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    border: 2px solid transparent;
    cursor: pointer;
    min-height: 48px;
    font-family: inherit;
}

.btn--primary {
    background: var(--text-light);
    color: var(--primary-blue);
    border-color: var(--text-light);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

    .btn--primary:hover {
        background: var(--surface);
        transform: translateY(-1px);
        box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    }

    .btn--primary:focus {
        outline: none;
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
    }

.btn--disabled {
    background: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.7);
    cursor: not-allowed;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: none;
}

    .btn--disabled:hover {
        transform: none;
        background: rgba(255, 255, 255, 0.3);
        box-shadow: none;
    }

/* Quick Navigation */
.quick-nav {
    list-style: none;
    padding: 0;
}

    .quick-nav li {
        margin-bottom: var(--spacing-xs);
    }

.quick-nav__link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    display: inline-block;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

    .quick-nav__link:hover,
    .quick-nav__link:focus {
        border-bottom-color: var(--primary-blue);
        color: var(--primary-blue-dark);
    }

/* FAQ */
.faq-item {
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.2s ease;
}

    .faq-item:hover {
        border-color: var(--border-dark);
        box-shadow: 0 2px 4px var(--shadow);
    }

.faq-question {
    background: var(--surface);
    padding: var(--spacing-md);
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    transition: background 0.2s ease;
    user-select: none;
}

    .faq-question:hover {
        background: var(--surface-hover);
    }

    .faq-question::-webkit-details-marker {
        display: none;
    }

    .faq-question::after {
        content: '+';
        float: right;
        font-weight: bold;
        font-size: 1.2em;
        transition: transform 0.2s ease;
        color: var(--primary-blue);
    }

.faq-item[open] .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
    background: var(--background);
}

    .faq-answer p {
        margin-bottom: 0;
    }

/* Footer */
.footer {
    background: var(--surface);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-2xl);
    border-top: 1px solid var(--border);
}

.footer__text {
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

    .footer__text a {
        color: var(--primary-blue);
        text-decoration: none;
        margin: 0 4px;
        font-weight: 500;
    }

        .footer__text a:hover {
            text-decoration: underline;
        }

/* ==================== */
/* RESPONSIVE DESIGN    */
/* ==================== */

/* Mobile First - 1 Banner */
.banner__grid {
    grid-template-columns: 1fr;
    padding: 0 var(--spacing-sm);
}

.banner__content[data-banner-index="1"],
.banner__content[data-banner-index="2"] {
    display: none;
}

/* Medium screens (Tablets) - 2 Banner */
@media (min-width: 768px) {
    .banner {
        padding: var(--spacing-xl) 0;
    }

    .banner__grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: var(--container-max-width);
        gap: var(--spacing-lg);
        padding: 0 var(--spacing-md);
    }

    .banner__content[data-banner-index="1"] {
        display: flex;
    }

    .banner__content[data-banner-index="2"] {
        display: none;
    }
}

/* Large screens (Desktop) - 3 Banner */
@media (min-width: 1024px) {
    :root {
        --container-padding: var(--spacing-md);
    }

    .banner {
        padding: var(--spacing-lg) 0;
    }

    .banner__grid {
        grid-template-columns: repeat(3, 1fr);
        max-width: var(--container-max-width);
        gap: var(--spacing-md);
        padding: 0 var(--spacing-md);
    }

    .banner__content[data-banner-index="2"] {
        display: flex;
    }

    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
        max-width: 800px;
        margin: 0 auto var(--spacing-lg) auto;
    }

    .shop-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .banner__text {
        font-size: 1.5rem;
    }
}

/* Extra Large screens (Full HD und größer) */
@media (min-width: 1200px) {
    .banner__grid {
        max-width: 1600px;
        gap: var(--spacing-lg);
    }
}

/* Full HD screens */
@media (min-width: 1920px) {
    .banner .container {
        max-width: 1800px;
        margin: 0 auto;
    }

    .banner__grid {
        max-width: 1800px;
        gap: var(--spacing-xl);
    }
}

/* Ultra Wide screens (2K/4K) */
@media (min-width: 2560px) {
    .banner .container {
        max-width: 2400px;
    }

    .banner__grid {
        max-width: 2400px;
    }
}

/* Medium screens (Tablets) */
@media (min-width: 768px) and (max-width: 1023px) {
    .hero__title {
        font-size: 2.25rem;
    }

    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .shop-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .content-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Small screens (Mobile) */
@media (max-width: 767px) {
    :root {
        --spacing-xl: 32px;
        --spacing-2xl: 48px;
    }

    .hero {
        padding: var(--spacing-lg) 0;
    }

    .hero__title {
        font-size: 2rem;
    }

    .hero__subtitle {
        font-size: 1.125rem;
    }

    .logo {
        height: 80px;
    }

    .modules-grid,
    .shop-grid,
    .content-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .card--module {
        min-height: 260px;
        padding: var(--spacing-md);
    }

    .btn {
        width: 100%;
        padding: 16px 24px;
    }

    .banner {
        padding: var(--spacing-sm) 0;
    }

    .banner__text {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

/* Extra small screens (Mobile) */
@media (max-width: 480px) {
    :root {
        --container-padding: 16px;
    }

    .hero__title {
        font-size: 1.75rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .logo {
        height: 60px;
    }

    .card--module {
        min-height: 240px;
    }

    h2 {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .banner {
        padding: 12px 0;
    }

    .banner__text {
        font-size: 1rem;
    }
}

/* Focus States */
a:focus,
button:focus,
details:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --shadow: rgba(0, 0, 0, 0.4);
        --shadow-hover: rgba(0, 0, 0, 0.5);
        --border: #000000;
        --border-dark: #000000;
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Loading States */
@keyframes shimmer {
    0% {
        background-position: -200px 0;
    }

    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.loading-shimmer {
    background: linear-gradient(90deg, var(--surface) 0px, var(--border) 100px, var(--surface) 200px);
    background-size: 200px 100%;
    animation: shimmer 1.5s infinite linear;
}