/* 
====================================================================
STUDIEN.CSS - SALES-ORIENTED STUDIES PAGE STYLES
====================================================================
*/

/* ===== ROI HERO SECTION ===== */
.roi-hero {
    background: linear-gradient(135deg, #1a1a1a 0%, #000000 100%);
    color: var(--white);
    padding: var(--space-4xl) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.roi-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 0%, rgba(255,255,255,0.1) 0%, transparent 50%);
    pointer-events: none;
}

.roi-hero-content {
    position: relative;
    z-index: 2;
    max-width: 1000px;
    margin: 0 auto;
}

.impact-badge {
    display: inline-block;
    background: #00ff88;
    color: #000000;
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-lg);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.roi-headline {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    margin-bottom: var(--space-lg);
    background: linear-gradient(45deg, #ffffff, #00ff88);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.1;
}

.roi-subheader {
    font-size: 1.25rem;
    color: #cccccc;
    margin-bottom: var(--space-2xl);
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.primary-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.primary-stat {
    background: rgba(255,255,255,0.05);
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: var(--space-xl);
    transition: all 0.3s ease;
}

.primary-stat.featured {
    background: linear-gradient(135deg, #00ff88, #00cc70);
    color: #000000;
    border-color: #00ff88;
    transform: scale(1.05);
}

.primary-stat:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: #00ff88;
    box-shadow: 0 20px 40px rgba(0,255,136,0.2);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.stat-source {
    font-size: 0.875rem;
    opacity: 0.8;
    font-style: italic;
}

.cta-section {
    margin-top: var(--space-2xl);
}

.cta-primary {
    display: inline-block;
    background: #00ff88;
    color: #000000;
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.125rem;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 10px 30px rgba(0,255,136,0.3);
}

.cta-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 40px rgba(0,255,136,0.4);
    background: #00cc70;
}

.cta-note {
    display: block;
    margin-top: 0.75rem;
    font-size: 0.875rem;
    color: #999999;
}

/* ===== PERFORMANCE IMPACT SECTION ===== */
.performance-impact {
    background: var(--white);
    color: var(--black);
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 900;
    color: #000000;
    margin-bottom: 0.5rem;
}

.section-header p {
    font-size: 1.125rem;
    color: #666666;
}

.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.impact-card {
    background: #ffffff;
    border: 2px solid #f0f0f0;
    border-radius: 12px;
    padding: var(--space-lg);
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
}

.impact-card.danger {
    border-color: #ff4444;
    background: #fff5f5;
}

.impact-card.warning {
    border-color: #ffaa00;
    background: #fffbf0;
}

.impact-card.success {
    border-color: #00ff88;
    background: #f0fff8;
}

.impact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.impact-icon {
    font-size: 2rem;
    margin-bottom: 0.75rem;
}

.impact-number {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: #000000;
}

.impact-text {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 0.5rem;
    color: #333333;
}

.impact-source {
    font-size: 0.875rem;
    color: #666666;
    font-style: italic;
}

/* ===== ROI CALCULATION SECTION ===== */
.roi-calculation {
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border: 2px solid #e9ecef;
    border-radius: 16px;
    padding: var(--space-xl);
    margin: var(--space-xl) 0;
}

.calculation-header {
    text-align: center;
    margin-bottom: var(--space-lg);
}

.calculation-header h4 {
    font-size: 1.5rem;
    font-weight: 700;
    color: #000000;
    margin-bottom: 0.5rem;
}

.calculation-header p {
    color: #666666;
    font-size: 1rem;
}

.calculation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
}

.calc-item {
    background: #ffffff;
    border: 2px solid #00ff88;
    border-radius: 12px;
    padding: var(--space-lg);
    text-align: center;
    transition: all 0.3s ease;
}

.calc-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,255,136,0.2);
}

.calc-scenario {
    font-size: 1rem;
    color: #666666;
    margin-bottom: 0.75rem;
}

.calc-result {
    font-size: 1.75rem;
    font-weight: 900;
    color: #00cc70;
    margin-bottom: 0.5rem;
}

.calc-note {
    font-size: 0.875rem;
    color: #888888;
    font-style: italic;
}

/* ===== INLINE CTA SECTIONS ===== */
.cta-section-inline {
    margin: var(--space-2xl) 0;
    text-align: center;
}

.cta-content-box {
    background: linear-gradient(135deg, #000000, #333333);
    color: var(--white);
    border-radius: 16px;
    padding: var(--space-xl);
    max-width: 600px;
    margin: 0 auto;
}

.cta-content-box h4 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #ffffff;
}

.cta-content-box p {
    color: #cccccc;
    margin-bottom: var(--space-lg);
    font-size: 1rem;
}

.cta-secondary {
    display: inline-block;
    background: #00ff88;
    color: #000000;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.3s ease;
}

.cta-secondary:hover {
    background: #00cc70;
    transform: translateY(-2px);
}

.roi-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-xl) 0;
}

.roi-item {
    text-align: center;
    padding: var(--space-lg);
}

.roi-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.roi-item h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: #000000;
}

.roi-item p {
    color: #666666;
    line-height: 1.6;
}

/* ===== MOBILE RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .roi-hero {
        padding: var(--space-2xl) 0;
    }
    
    .roi-headline {
        font-size: 2.5rem;
    }
    
    .roi-subheader {
        font-size: 1.125rem;
        margin-bottom: var(--space-xl);
    }
    
    .primary-stats {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .primary-stat.featured {
        transform: none;
    }
    
    .impact-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .calculation-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .roi-breakdown {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .cta-primary,
    .cta-secondary {
        display: block;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .roi-hero {
        padding: var(--space-xl) 0;
    }
    
    .roi-headline {
        font-size: 2rem;
    }
    
    .impact-badge {
        font-size: 0.75rem;
        padding: 0.375rem 1rem;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .calc-result {
        font-size: 1.5rem;
    }
    
    .impact-number {
        font-size: 1.75rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
}

/* ===== STATS GRID ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-4xl) 0;
}

.stat-card {
    background: var(--gray-900);
    border: 2px solid var(--gray-700);
    border-radius: 16px;
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    border-color: var(--white);
    box-shadow: var(--shadow-lg);
    background: var(--gray-800);
}

.stat-card h3 {
    font-size: 2rem;
    font-weight: 900;
    color: var(--white);
    margin-bottom: var(--space-sm);
}

.stat-card p {
    color: var(--gray-600);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.stat-card cite {
    font-size: 0.875rem;
    color: var(--gray-500);
    font-style: italic;
}

/* ===== STUDY ARTICLE ===== */
.study-article {
    background: var(--gray-900);
    border-radius: 20px;
    padding: var(--space-4xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-700);
}

.study-article h2 {
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    color: var(--white);
    text-align: center;
}

.study-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: var(--space-2xl) 0 var(--space-lg);
    color: var(--white);
}

.study-content p {
    color: var(--gray-300);
    line-height: 1.7;
    margin-bottom: var(--space-lg);
    font-size: 1rem;
}

.study-content blockquote {
    background: var(--gray-800);
    border-left: 4px solid var(--white);
    padding: var(--space-lg) var(--space-xl);
    margin: var(--space-2xl) 0;
    border-radius: 0 8px 8px 0;
    font-style: italic;
    position: relative;
    color: var(--gray-200);
}

.study-content blockquote cite {
    display: block;
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--gray-600);
    font-style: normal;
    font-weight: 600;
}

/* ===== CREDIBILITY FACTORS ===== */
.credibility-factors {
    background: var(--gray-800);
    border: 2px solid var(--gray-700);
    border-radius: 12px;
    padding: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.credibility-factors h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: var(--white);
}

.credibility-factors ol {
    list-style: none;
    counter-reset: credibility-counter;
}

.credibility-factors li {
    counter-increment: credibility-counter;
    margin-bottom: var(--space-md);
    padding-left: var(--space-lg);
    position: relative;
    color: var(--gray-300);
    line-height: 1.6;
}

.credibility-factors li::before {
    content: counter(credibility-counter);
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    background: var(--white);
    color: var(--black);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 700;
}

/* ===== PERFORMANCE DATA ===== */
.performance-data {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin: var(--space-2xl) 0;
}

.perf-stat {
    background: var(--gray-800);
    border: 2px solid var(--gray-700);
    border-radius: 12px;
    padding: var(--space-lg);
    transition: var(--transition);
}

.perf-stat:hover {
    transform: translateY(-2px);
    border-color: var(--white);
    box-shadow: var(--shadow-lg);
    background: var(--gray-700);
}

.perf-stat strong {
    color: var(--white);
    font-weight: 700;
}

/* ===== MOBILE STATS ===== */
.mobile-stats {
    background: var(--gray-800);
    border: 2px solid var(--gray-700);
    border-radius: 12px;
    padding: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.mobile-stats h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-lg);
    color: var(--white);
}

.mobile-stats ul {
    list-style: none;
}

.mobile-stats li {
    margin-bottom: var(--space-sm);
    padding: var(--space-sm) 0;
    color: var(--gray-300);
    border-bottom: 1px solid var(--gray-700);
}

.mobile-stats li:last-child {
    border-bottom: none;
}

.mobile-stats strong {
    color: var(--white);
    font-weight: 700;
}

/* ===== ROI BREAKDOWN ===== */
.roi-breakdown {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-xl);
    margin: var(--space-2xl) 0;
}

.roi-item {
    background: var(--gray-800);
    border: 2px solid var(--gray-700);
    border-radius: 12px;
    padding: var(--space-xl);
    text-align: center;
    transition: var(--transition);
}

.roi-item:hover {
    transform: translateY(-2px);
    border-color: var(--white);
    box-shadow: var(--shadow-lg);
    background: var(--gray-700);
}

.roi-item h4 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--white);
}

.roi-item p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===== SOURCES SECTION ===== */
.sources-section {
    margin-top: var(--space-4xl);
    padding-top: var(--space-4xl);
    border-top: 2px solid var(--gray-200);
}

.sources-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    color: var(--white);
    text-align: center;
}

.sources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.source-item {
    background: var(--gray-800);
    border: 1px solid var(--gray-700);
    border-radius: 12px;
    padding: var(--space-xl);
    transition: var(--transition);
}

.source-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--white);
    background: var(--gray-700);
}

.source-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--white);
}

.source-item p {
    color: var(--gray-600);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
    font-size: 0.95rem;
}

.source-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    color: var(--white);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
}

.source-link:hover {
    color: var(--gray-400);
}

/* ===== TYPOGRAPHY UTILITIES ===== */
.bg-gray-50 {
    background-color: var(--gray-900);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: var(--space-lg);
    }
    
    .performance-data {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--space-md);
    }
    
    .roi-breakdown {
        grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
        gap: var(--space-lg);
    }
    
    .sources-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--space-lg);
    }
}

@media (max-width: 768px) {
    .study-article {
        padding: var(--space-2xl);
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--space-md);
    }
    
    .stat-card {
        padding: var(--space-lg);
    }
    
    .stat-card h3 {
        font-size: 1.75rem;
    }
    
    .performance-data {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .perf-stat {
        padding: var(--space-md);
    }
    
    .credibility-factors {
        padding: var(--space-lg);
    }
    
    .mobile-stats {
        padding: var(--space-lg);
    }
    
    .roi-breakdown {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .roi-item {
        padding: var(--space-lg);
    }
    
    .sources-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .source-item {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .study-article {
        padding: var(--space-xl);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .stat-card {
        padding: var(--space-md);
    }
    
    .stat-card h3 {
        font-size: 1.5rem;
    }
    
    .study-content blockquote {
        padding: var(--space-md) var(--space-lg);
    }
    
    .credibility-factors {
        padding: var(--space-md);
    }
    
    .credibility-factors li {
        padding-left: var(--space-md);
    }
    
    .credibility-factors li::before {
        width: 20px;
        height: 20px;
        font-size: 0.6875rem;
    }
    
    .mobile-stats {
        padding: var(--space-md);
    }
    
    .roi-item {
        padding: var(--space-md);
    }
    
    .source-item {
        padding: var(--space-md);
    }
}