/* ============================================
   BUCH PRODUKTSEITE - PREMIUM & ELEGANT
   ============================================ */

/* ===== Page Container ===== */
.buch-page {
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.buch-container {
    padding: 4rem 0;
}

/* ===== Buchcover & Klappentext Section ===== */
.buch-cover-section {
    display: flex;
    gap: 4rem;
    align-items: flex-start;
    margin-bottom: 5rem;
    background: #ffffff;
    border-radius: 20px;
    padding: 3rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.buch-cover-wrapper {
    flex: 0 0 auto;
    width: 100%;
    max-width: 420px;
    position: relative;
}

.buch-cover-badge {
    position: absolute;
    top: -12px;
    right: -12px;
    background: linear-gradient(135deg, #0096ff 0%, #0077cc 100%);
    color: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 150, 255, 0.4);
    z-index: 2;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.buch-cover-image {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.buch-cover-wrapper:hover .buch-cover-image {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.buch-info-wrapper {
    flex: 1;
    min-width: 0;
}

.buch-section-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 0.5rem 0;
    line-height: 1.2;
}

.buch-section-subtitle {
    font-size: 1.125rem;
    color: #0096ff;
    font-weight: 600;
    margin: 0 0 2rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.buch-klappentext {
    font-size: 1.125rem;
    color: #4a5568;
    line-height: 1.9;
    margin-bottom: 2.5rem;
}

.buch-klappentext p {
    margin-bottom: 1.25rem;
}

.buch-klappentext p:last-child {
    margin-bottom: 0;
}

/* Features List */
.buch-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(0, 150, 255, 0.05) 0%, rgba(0, 150, 255, 0.02) 100%);
    border-radius: 12px;
    border: 1px solid rgba(0, 150, 255, 0.1);
}

.buch-feature-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.938rem;
    color: #1a202c;
}

.buch-feature-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: #0096ff;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

/* Buy Section */
.buch-buy-section {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.buch-price-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.buch-price {
    font-size: 2.5rem;
    font-weight: 700;
    color: #0096ff;
    line-height: 1;
}

.buch-price-note {
    font-size: 0.875rem;
    color: #718096;
}

.buch-buy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1.125rem 2.5rem;
    background: linear-gradient(135deg, #0096ff 0%, #0077cc 100%);
    color: #ffffff;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 12px;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 8px 24px rgba(0, 150, 255, 0.35);
    position: relative;
    overflow: hidden;
}

.buch-buy-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s ease;
}

.buch-buy-btn:hover::before {
    left: 100%;
}

.buch-buy-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 150, 255, 0.45);
    color: #ffffff;
    text-decoration: none;
}

.buch-buy-btn i {
    font-size: 1.125rem;
}

/* Trust Indicators */
.buch-trust-indicators {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.08);
}

.buch-trust-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #718096;
}

.buch-trust-item i {
    color: #22c55e;
    font-size: 1rem;
}

/* ===== Stats Section ===== */
.buch-stats-section {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-bottom: 5rem;
}

.buch-stat-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.buch-stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.buch-stat-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1rem;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(0, 150, 255, 0.1) 0%, rgba(0, 150, 255, 0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #0096ff;
    font-size: 1.75rem;
}

.buch-stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 0.25rem 0;
}

.buch-stat-label {
    font-size: 0.875rem;
    color: #718096;
    margin: 0;
}

/* ===== Inhaltsverzeichnis Section ===== */
.buch-content-section {
    background: #ffffff;
    border-radius: 20px;
    padding: 4rem 3rem;
    margin-bottom: 5rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}

.buch-content-header {
    text-align: center;
    margin-bottom: 3.5rem;
    position: relative;
}

.buch-content-header::after {
    content: '';
    position: absolute;
    bottom: -1.5rem;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #0096ff, #0077cc);
    border-radius: 2px;
}

.buch-content-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: #1a202c;
    margin: 0 0 1rem 0;
}

.buch-content-subtitle {
    font-size: 1.125rem;
    color: #718096;
    margin: 0;
}

/* Accordion/Details */
.buch-accordion {
    max-width: 900px;
    margin: 0 auto;
}

.buch-accordion-item {
    background: #ffffff;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-radius: 16px;
    margin-bottom: 1.25rem;
    overflow: hidden;
    transition: all 0.3s ease;
}

.buch-accordion-item:hover {
    border-color: rgba(0, 150, 255, 0.3);
    box-shadow: 0 4px 20px rgba(0, 150, 255, 0.1);
}

.buch-accordion-item[open] {
    border-color: #0096ff;
}

.buch-accordion-summary {
    list-style: none;
    cursor: pointer;
    padding: 1.5rem 2rem;
    font-size: 1.188rem;
    font-weight: 600;
    color: #1a202c;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
    user-select: none;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.buch-accordion-summary:hover {
    background: linear-gradient(135deg, rgba(0, 150, 255, 0.08) 0%, rgba(0, 150, 255, 0.03) 100%);
}

.buch-accordion-summary::-webkit-details-marker {
    display: none;
}

.buch-accordion-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, #0096ff 0%, #0077cc 100%);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    box-shadow: 0 2px 8px rgba(0, 150, 255, 0.3);
}

.buch-accordion-item[open] .buch-accordion-icon {
    transform: rotate(90deg);
}

.buch-accordion-content {
    padding: 1.5rem 2rem 2rem 2rem;
    color: #4a5568;
    background: #ffffff;
}

.buch-accordion-list {
    margin: 0;
    padding: 0;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.buch-accordion-list li {
    position: relative;
    padding: 0.875rem 1rem 0.875rem 3rem;
    background: #f8fafc;
    border-radius: 8px;
    line-height: 1.5;
    transition: all 0.2s ease;
}

.buch-accordion-list li::before {
    content: "✓";
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    border-radius: 6px;
    background: #0096ff;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

.buch-accordion-list li:hover {
    background: rgba(0, 150, 255, 0.08);
    transform: translateX(4px);
}

/* ===== Autor Section ===== */
.buch-autor-section {
    background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
    border-radius: 20px;
    padding: 4rem 3rem;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.buch-autor-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: radial-gradient(circle at 20% 50%, rgba(0, 150, 255, 0.1) 0%, transparent 50%),
                      radial-gradient(circle at 80% 80%, rgba(0, 150, 255, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.buch-autor-wrapper {
    display: flex;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.buch-autor-image-wrapper {
    flex: 0 0 auto;
    position: relative;
}

.buch-autor-image-wrapper::after {
    content: '';
    position: absolute;
    inset: -8px;
    border-radius: 50%;
    background: linear-gradient(135deg, #0096ff, #0077cc);
    z-index: -1;
    opacity: 0.3;
    filter: blur(12px);
}

.buch-autor-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.buch-autor-content {
    flex: 1;
    min-width: 0;
}

.buch-autor-title {
    font-size: 2.25rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 0.5rem 0;
}

.buch-autor-subtitle {
    font-size: 1.125rem;
    color: #0096ff;
    font-weight: 600;
    margin: 0 0 2rem 0;
}

.buch-autor-text {
    font-size: 1.063rem;
    color: rgba(255, 255, 255, 0.9);
    line-height: 1.9;
    margin-bottom: 1.25rem;
}

.buch-autor-text:last-child {
    margin-bottom: 0;
}

.buch-autor-text strong {
    color: #ffffff;
    font-weight: 600;
}

/* ===== CTA Section ===== */
.buch-cta-section {
    background: linear-gradient(135deg, #0096ff 0%, #0077cc 100%);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 150, 255, 0.3);
    margin-top: 5rem;
}

.buch-cta-title {
    font-size: 2rem;
    font-weight: 700;
    color: #ffffff;
    margin: 0 0 1rem 0;
}

.buch-cta-text {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    margin: 0 auto 2rem;
    max-width: 600px;
}

.buch-cta-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.625rem;
    padding: 1.125rem 2.5rem;
    background: #ffffff;
    color: #0096ff;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 12px;
    border: none;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.buch-cta-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    color: #0077cc;
    text-decoration: none;
}

/* ===== Responsive Design ===== */
@media (max-width: 1199.98px) {
    .buch-stats-section {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 991.98px) {
    .buch-container {
        padding: 3rem 0;
    }

    .buch-cover-section {
        flex-direction: column;
        gap: 2.5rem;
        padding: 2.5rem;
        margin-bottom: 3.5rem;
    }

    .buch-cover-wrapper {
        max-width: 350px;
        margin: 0 auto;
    }

    .buch-features {
        grid-template-columns: 1fr;
    }

    .buch-section-title,
    .buch-content-title,
    .buch-autor-title,
    .buch-cta-title {
        font-size: 1.875rem;
    }

    .buch-stats-section {
        gap: 1.25rem;
        margin-bottom: 3.5rem;
    }

    .buch-content-section,
    .buch-autor-section,
    .buch-cta-section {
        padding: 3rem 2rem;
        margin-bottom: 3.5rem;
    }

    .buch-autor-wrapper {
        flex-direction: column;
        text-align: center;
        gap: 2.5rem;
    }

    .buch-accordion-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 767.98px) {
    .buch-container {
        padding: 2rem 0;
    }

    .buch-cover-section {
        gap: 2rem;
        padding: 2rem;
        margin-bottom: 2.5rem;
    }

    .buch-section-title,
    .buch-content-title,
    .buch-autor-title,
    .buch-cta-title {
        font-size: 1.625rem;
    }

    .buch-klappentext,
    .buch-autor-text,
    .buch-cta-text {
        font-size: 1rem;
    }

    .buch-stats-section {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin-bottom: 2.5rem;
    }

    .buch-buy-section {
        flex-direction: column;
        align-items: stretch;
    }

    .buch-buy-btn,
    .buch-cta-btn {
        width: 100%;
        padding: 1rem 2rem;
        font-size: 1rem;
    }

    .buch-content-section,
    .buch-autor-section,
    .buch-cta-section {
        padding: 2.5rem 1.5rem;
        margin-bottom: 2.5rem;
    }

    .buch-accordion-summary {
        padding: 1.25rem 1.5rem;
        font-size: 1.063rem;
    }

    .buch-accordion-content {
        padding: 1.25rem 1.5rem 1.5rem 1.5rem;
    }

    .buch-autor-image {
        width: 160px;
        height: 160px;
    }
}

@media (max-width: 575.98px) {
    .buch-cover-section {
        padding: 1.5rem;
    }

    .buch-section-title,
    .buch-content-title,
    .buch-autor-title {
        font-size: 1.5rem;
    }

    .buch-cta-title {
        font-size: 1.375rem;
    }

    .buch-price {
        font-size: 2rem;
    }

    .buch-stat-value {
        font-size: 1.75rem;
    }

    .buch-accordion-summary {
        font-size: 1rem;
        padding: 1rem 1.25rem;
        gap: 0.75rem;
    }

    .buch-accordion-icon {
        width: 36px;
        height: 36px;
        font-size: 0.938rem;
    }

    .buch-accordion-list li {
        padding: 0.75rem 0.875rem 0.75rem 2.75rem;
        font-size: 0.938rem;
    }

    .buch-autor-image {
        width: 140px;
        height: 140px;
    }
}