:root {
    --primary-color: #1b264f;
    --secondary-color: #3a4e91;
    --accent-color: #ff6b6b;
    --success-color: #22c55e;
    --dark-bg: #0f172a;
    --card-bg: rgba(255, 255, 255, 0.1);
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.18);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 15px 35px rgba(0, 0, 0, 0.2);
    --shadow-heavy: 0 25px 50px rgba(0, 0, 0, 0.3);
}

/* Enhanced Loading Screen */
.loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--dark-bg);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loader {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top: 4px solid var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* Modern Patients Section */
.patients-section {
    min-height: 100vh;
    background:
        radial-gradient(ellipse at top left, rgba(34, 197, 94, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom right, rgba(59, 130, 246, 0.15), transparent 50%),
        linear-gradient(135deg, var(--dark-bg) 0%, #1e293b 100%);
    padding: 6rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.patients-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.02'%3E%3Ccircle cx='30' cy='30' r='1'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    z-index: 0;
}

.section-header {
    text-align: center;
    margin-bottom: 5rem;
    position: relative;
    z-index: 1;
}

.section-title-patient {
    font-size: 3.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, #86efac 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1.5rem;
    margin-top: 2rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 4px;
    background: linear-gradient(135deg, var(--success-color), #3b82f6);
    border-radius: 2px;
}

.section-subtitle-patient {
    font-size: 1.3rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
}

/* Modern Cases Grid */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
    gap: 2.5rem;
    position: relative;
    z-index: 1;
}

/* Modern Case Card */
.case-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 0;
    border: 1px solid var(--glass-border);
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
}

.case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(135deg, var(--success-color), #3b82f6);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
    z-index: 2;
}

.case-card:hover {
    transform: translateY(-15px) scale(1.02);
    box-shadow: var(--shadow-heavy);
    border-color: rgba(255, 255, 255, 0.3);
}

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

.case-images {
    height: 280px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    position: relative;
    overflow: hidden;
}

.case-image {
    position: relative;
    overflow: hidden;
}

.case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.8s ease;
}

.case-card:hover .case-image img {
    transform: scale(1.1);
}

.image-before {
    background: linear-gradient(135deg, #ef4444, #dc2626);
}

.image-after {
    background: linear-gradient(135deg, #22c55e, #16a34a);
}

.image-label {
    position: absolute;
    bottom: 15px;
    padding: 8px 16px;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    border-radius: 20px;
    z-index: 2;
}

.label-before {
    left: 15px;
    background: rgba(220, 38, 38, 0.9);
}

.label-after {
    right: 15px;
    background: rgba(34, 197, 94, 0.9);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.3) 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.case-card:hover .image-overlay {
    opacity: 1;
}

.case-content {
    padding: 2rem;
}

.case-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.case-card:hover .case-title {
    color: var(--success-color);
}

.case-meta {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    margin-bottom: 1.5rem;
}

.case-meta-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.case-meta-icon {
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.case-date {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.case-button {
    background: linear-gradient(135deg, var(--success-color), #3b82f6);
    color: white;
    border: none;
    padding: 0.8rem 1.8rem;
    border-radius: 25px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 4px 15px rgba(34, 197, 94, 0.3);
}

.case-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
}

/* Modern Case Modal */
.case-modal {
    position: fixed;
    inset: 0;
    z-index: 1050;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    padding: 2rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
}

.case-modal.active {
    opacity: 1;
    visibility: visible;
}

.case-modal-content {
    width: 100%;
    max-width: 1000px;
    max-height: 90vh;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border-radius: 28px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-heavy);
    overflow: hidden;
    position: relative;
    transform: scale(0.9) translateY(20px);
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1);
}

.case-modal.active .case-modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.modal-close:hover {
    background: var(--accent-color);
    transform: rotate(90deg);
}

.modal-header {
    padding: 2.5rem 2.5rem 0;
    position: relative;
}

.modal-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.3;
}

.modal-meta {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.modal-meta-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    color: var(--text-secondary);
    font-size: 1rem;
}

.modal-meta-icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.modal-body {
    padding: 0 2.5rem 2.5rem;
    max-height: 60vh;
    overflow-y: auto;
}

.modal-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.modal-image {
    border-radius: 16px;
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-medium);
}

.modal-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    display: block;
}

.modal-image-label {
    position: absolute;
    top: 15px;
    padding: 8px 16px;
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    border-radius: 20px;
}

.modal-label-before {
    left: 15px;
    background: rgba(220, 38, 38, 0.9);
}

.modal-label-after {
    right: 15px;
    background: rgba(34, 197, 94, 0.9);
}

.modal-description {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.modal-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    border-radius: 16px;
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.modal-success h4 {
    color: var(--success-color);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.modal-action-btn {
    padding: 0.9rem 1.8rem;
    border-radius: 25px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--success-color), #3b82f6);
    color: white;
    border: none;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.modal-action-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
}

/* Animation for card entrance */
@keyframes cardEntrance {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.9);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.case-card {
    animation: cardEntrance 0.7s ease-out forwards;
    opacity: 0;
}

.case-card:nth-child(1) {
    animation-delay: 0.1s;
}

.case-card:nth-child(2) {
    animation-delay: 0.2s;
}

.case-card:nth-child(3) {
    animation-delay: 0.3s;
}

.case-card:nth-child(4) {
    animation-delay: 0.4s;
}

.case-card:nth-child(5) {
    animation-delay: 0.5s;
}

.case-card:nth-child(6) {
    animation-delay: 0.6s;
}

/* No Cases State */
.no-cases {
    grid-column: 1 / -1;
    text-align: center;
    padding: 5rem 2rem;
    background: var(--glass-bg);
    border-radius: 24px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
}

.no-cases-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.no-cases h3 {
    color: var(--text-primary);
    margin-bottom: 1rem;
    font-size: 1.8rem;
}

.no-cases p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
    margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .cases-grid {
        grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    }
}

@media (max-width: 992px) {
    .patients-section {
        padding: 5rem 0 3rem;
    }

    .section-title {
        font-size: 2.8rem;
    }

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

    .modal-title {
        font-size: 2rem;
    }

    .modal-images {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .patients-section {
        padding: 4rem 0 2rem;
    }

    .section-title-patient {
        font-size: 2.2rem;
    }

    .section-subtitle-patient {
        font-size: 1.1rem;
    }

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

    .case-modal {
        padding: 1rem;
    }

    .modal-header,
    .modal-body {
        padding: 1.5rem;
    }

    .modal-title {
        font-size: 1.8rem;
    }

    .modal-meta {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 576px) {
    .patients-section {
        padding: 3rem 1rem 2rem;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .case-content {
        padding: 1.5rem;
    }

    .modal-header,
    .modal-body {
        padding: 1.25rem;
    }

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

    .modal-actions {
        flex-direction: column;
    }

    .modal-action-btn {
        width: 100%;
        justify-content: center;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .case-card {
        animation: none;
        opacity: 1;
    }

    .case-card:hover {
        transform: none;
    }

    .case-button:hover,
    .modal-action-btn:hover {
        transform: none;
    }
}