/* Trust Section - 반응형 디자인 */
.ai_trust {
    padding: 3rem 1rem;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.ai_trust::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

.ai_trust__container {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.ai_trust__header {
    text-align: center;
    margin-bottom: 3rem;
}

.ai_trust__title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.ai_trust__subtitle {
    font-size: 1rem;
    color: #64748b;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.ai_trust__grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: 1fr;
}

/* Trust Cards */
.ai_trust-card {
    background: #ffffff;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    border: 1px solid #e2e8f0;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.ai_trust-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.ai_trust-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.ai_trust-card:hover::before {
    transform: scaleX(1);
}

.ai_trust-card__icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: #ffffff;
}

.ai_trust-card__icon svg {
    width: 24px;
    height: 24px;
}

.ai_trust-card__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.ai_trust-card__content {
    color: #64748b;
}

.ai_trust-card__list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.ai_trust-card__list li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.5rem;
    line-height: 1.5;
    font-size: 0.875rem;
}

.ai_trust-card__list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    color: #10b981;
    font-weight: bold;
    font-size: 0.875rem;
}

.ai_trust-card__list li:last-child {
    margin-bottom: 0;
}

/* Card Variants */
.ai_trust-card--certificate .ai_trust-card__icon {
    background: linear-gradient(135deg, #f59e0b, #f97316);
}

.ai_trust-card--insurance .ai_trust-card__icon {
    background: linear-gradient(135deg, #10b981, #059669);
}

.ai_trust-card--award .ai_trust-card__icon {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.ai_trust-card--experience .ai_trust-card__icon {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.ai_trust-card--statistics .ai_trust-card__icon {
    background: linear-gradient(135deg, #06b6d4, #0891b2);
}

/* Tablet Styles */
@media (min-width: 768px) {
    .ai_trust {
        padding: 4rem 2rem;
    }
    
    .ai_trust__title {
        font-size: 2.25rem;
    }
    
    .ai_trust__subtitle {
        font-size: 1.125rem;
    }
    
    .ai_trust__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
    
    .ai_trust-card {
        padding: 2rem;
    }
    
    .ai_trust-card__icon {
        width: 56px;
        height: 56px;
    }
    
    .ai_trust-card__icon svg {
        width: 28px;
        height: 28px;
    }
    
    .ai_trust-card__title {
        font-size: 1.25rem;
    }
    
    .ai_trust-card__list li {
        font-size: 1rem;
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .ai_trust {
        padding: 5rem 2rem;
    }
    
    .ai_trust__title {
        font-size: 2.5rem;
    }
    
    .ai_trust__grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2.5rem;
    }
    
    .ai_trust-card {
        padding: 2.5rem;
    }
    
    .ai_trust-card__icon {
        width: 64px;
        height: 64px;
    }
    
    .ai_trust-card__icon svg {
        width: 32px;
        height: 32px;
    }
    
    .ai_trust-card__title {
        font-size: 1.375rem;
    }
}

/* Large Desktop Styles */
@media (min-width: 1280px) {
    .ai_trust__grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 2rem;
    }
    
    .ai_trust-card {
        padding: 2rem;
    }
    
    .ai_trust-card__title {
        font-size: 1.25rem;
    }
}

/* Animation for cards */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai_trust-card {
    animation: fadeInUp 0.6s ease forwards;
}

.ai_trust-card:nth-child(1) { animation-delay: 0.1s; }
.ai_trust-card:nth-child(2) { animation-delay: 0.2s; }
.ai_trust-card:nth-child(3) { animation-delay: 0.3s; }
.ai_trust-card:nth-child(4) { animation-delay: 0.4s; }
.ai_trust-card:nth-child(5) { animation-delay: 0.5s; }

/* Focus styles for accessibility */
.ai_trust-card:focus-within {
    outline: 2px solid #3b82f6;
    outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .ai_trust-card {
        animation: none;
        transition: none;
    }
    
    .ai_trust-card:hover {
        transform: none;
    }
    
    .ai_trust-card::before {
        transition: none;
    }
}