:root {
    --primary-blue: #2563eb;
    --primary-blue-dark: #1d4ed8;
    --primary-blue-light: #3b82f6;
    --secondary-green: #059669;
    --secondary-green-light: #10b981;
    --accent-purple: #7c3aed;
    --accent-orange: #ea580c;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: 5rem;
    padding: 3rem 0;
}

/* Method Cards */
.methods-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.method-card {
    /* background: white; */
    border: 1px solid #e2e8f0;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    transition: box-shadow 0.3s ease;
}

.method-card:hover {
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    animation: fadeInUp 0.8s ease-out;
}

.hero h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 3.75rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1.5rem;
    line-height: 1.1;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero p {
    font-size: 1.25rem;
    color: var(--gray-600);
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Introduction Section */
.intro-section {
    background: var(--white);
    border-radius: 20px;
    padding: 3rem;
    margin-bottom: 4rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-100);
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.intro-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
}

.icon {
    width: 1.25rem;
    height: 1.25rem;
}

.intro-icon {
    width: 4rem;
    height: 4rem;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.intro-header h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
}

.intro-content p {
    font-size: 1.125rem;
    color: var(--gray-700);
    line-height: 1.8;
}

/* Models Grid */
.models-grid {
    display: grid;
    gap: 3rem;
    margin-bottom: 4rem;
}

/* Model Cards */
.model-card {
    /* background: var(--white); */
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    /* border: 1px solid var(--gray-100); */
    border: 1px solid var(--border-color);
    transition: all 0.4s ease;
    animation: fadeInUp 0.8s ease-out;
}

.model-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
}

.model-header {
    padding: 2.5rem 3rem;
    /* background: linear-gradient(135deg, var(--gray-50), var(--white));
    border-bottom: 1px solid var(--gray-100); */
    background: var(--bs-card-bg);
    border-bottom: 1px solid var(--border-color);
}

.model-title-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.model-title-left {
    display: flex;
    /* align-items: center; */
    gap: 1.5rem;
}

.model-icon {
    width: 4rem;
    height: 4rem;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    box-shadow: var(--shadow-lg);
}

.model-icon.marketplace {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
}

.model-icon.single {
    background: linear-gradient(135deg, var(--secondary-green), var(--secondary-green-light));
}

.model-icon.commission {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));
}

.model-titles h3 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.75rem;
    font-weight: 700;
    /* color: var(--gray-900); */
    margin-bottom: 0.5rem;
}

.model-titles p {
    font-size: 1rem;
    /* color: var(--gray-600); */
    font-weight: 500;
}

.model-badge {
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-recommended {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-blue-light));
    color: var(--white);
}

.badge-simple {
    background: linear-gradient(135deg, var(--secondary-green), var(--secondary-green-light));
    color: var(--white);
}

.badge-centralized {
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-orange));
    color: var(--white);
}

.model-description {
    font-size: 1.125rem;
    /* color: var(--gray-700); */
    line-height: 1.8;
}

.model-content {
    padding: 3rem;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2.5rem;
}

.content-section h4 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    /* color: var(--gray-900); */
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    /* color: var(--gray-700); */
    color: var(--bs-dark-light-footer-otp);
    margin-bottom: 1rem;
    font-size: 1rem;
    line-height: 1.6;
}

.feature-icon {
    color: var(--primary-blue-light);
    flex-shrink: 0;
}

.info-box {
    /* background: linear-gradient(135deg, var(--gray-50), var(--white)); */
    background: var(--bs-gray-25);
    /* border: 1px solid var(--gray-200); */
    border: 1px solid var(--bs-border-color);
    border-radius: 16px;
    padding: 2rem;
}

.info-box h5 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    /* color: var(--gray-900); */
    margin-bottom: 1rem;
    font-size: 1rem;
}

.info-box p {
    /* color: var(--gray-700); */
    color: var(--bs-base-color);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.info-box ul {
    /* margin-left: 1.5rem; */
    /* color: var(--gray-700); */
}

.info-box ul li {
    margin-bottom: 0.5rem;
}

/* Alert Boxes */
.alert {
    border-radius: 16px;
    padding: 2rem;
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    border-left: 4px solid;
}

.alert-warning {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-left-color: var(--accent-orange);
}

.alert-info {
    background: linear-gradient(135deg, #dbeafe, #bfdbfe);
    border-left-color: var(--primary-blue);
}

.alert-icon {
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.alert-warning .alert-icon {
    color: var(--accent-orange);
    background: none;
    box-shadow: none;
}

.alert-info .alert-icon {
    color: var(--primary-blue);
    background: none;
    box-shadow: none;
}

.alert-content h5 {
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    margin-bottom: 0.75rem;
    font-size: 1rem;
}

.alert-warning h5 {
    color: #92400e;
}

.alert-info h5 {
    color: var(--primary-blue-dark);
}

.alert-content p {
    color: var(--gray-700);
    line-height: 1.6;
}

/* Footer */
.footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 3rem 0;
    text-align: center;
    margin-top: 5rem;
}

.footer-content {
    color: var(--gray-500);
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.model-icon.marketplace svg{
    width: 28;
    height: 28;
    fill: none;
    stroke: currentcolor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.model-icon.marketplace {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
}

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

.fade-in {
    animation: fadeInUp 0.8s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1.125rem;
    }

    .intro-section,
    .model-content {
        padding: 2rem;
    }

    .model-header {
        padding: 2rem;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .model-title-row {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .model-title-left {
        flex-direction: column;
        text-align: center;
    }
}

/* Print Styles */
@media print {
    .header {
        position: static;
    }
    
    .model-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
}