/* ====================
   PROBLEM PAGE STYLES
   ==================== */

.problems-grid {
    display: flex;
    flex-direction: column;
    gap: 50px;
    max-width: 1000px;
    margin: 0 auto;
}

.problem-card {
    background: var(--color-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--color-gray-200);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.problem-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.problem-card-header {
    background: var(--color-black);
    color: var(--color-white);
    padding: 25px 30px;
    border-bottom: 1px solid var(--color-gray-800);
}

.problem-card-header h3 {
    color: var(--color-white);
    margin: 0;
    font-size: 1.6rem;
    font-weight: 700;
}

.problem-card-body {
    display: flex;
    flex-direction: row;
    padding: 0;
}

@media (max-width: 768px) {
    .problem-card-body {
        flex-direction: column;
    }
}

.problem-image {
    flex: 0 0 40%;
    min-height: 300px;
    overflow: hidden;
}

.problem-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.problem-card:hover .problem-image img {
    transform: scale(1.03);
}

.problem-content {
    flex: 1;
    padding: 35px 30px;
}

.problem-content h4 {
    color: var(--color-black);
    font-size: 1.2rem;
    font-weight: 600;
    margin: 25px 0 10px 0;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-gray-200);
}

.problem-content h4:first-of-type {
    margin-top: 0;
}

.problem-content p {
    color: var(--color-gray-800);
    line-height: 1.7;
    margin-bottom: 15px;
}

.problem-content strong {
    color: var(--color-black);
    font-weight: 600;
}

.problem-card-footer {
    background: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
    padding: 20px 30px;
}

.problem-card-footer h5 {
    color: var(--color-gray-800);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

.reference-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.reference-links li {
    margin-bottom: 8px;
}

.ref-link {
    color: var(--color-gray-700);
    text-decoration: none;
    font-size: 0.9rem;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    transition: color 0.2s ease;
}

.ref-link:hover {
    color: var(--color-black);
    text-decoration: underline;
}

.ref-link::before {
    content: "↗";
    display: inline-block;
    margin-right: 8px;
    font-size: 0.8rem;
    color: var(--color-gray-500);
}

/* Page Hero Update */
.page-hero {
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-black) 100%);
    color: var(--color-white);
    padding: 100px 0;
    text-align: center;
}

.page-hero h1 {
    color: var(--color-white);
    margin-bottom: 20px;
}



/* Animations */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-in.visible {
    opacity: 1;
    transform: translateY(0);
}