* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #4b5563;
    --bg-light: #eff6ff;
    --white: #ffffff;
    --border-color: #dbeafe;
    --success-color: #10b981;
    --gradient: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--white);
}
h1 {
    font-size: 2.5rem;
    line-height: 1.2;
    font-weight: 700;
    margin: 0;
    padding: 0;
}

h2 {
    font-size: 2rem;
    line-height: 1.3;
    font-weight: 600;
}

h3 {
    font-size: 1.5rem;
    line-height: 1.4;
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    line-height: 1.4;
    font-weight: 600;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    padding: 1rem 0;
}

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    padding: 0;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.hero {
    background: var(--gradient);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
    font-weight: 700;
}
.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.9;
    opacity: 1;
    color: #f0fdf4;
    font-weight: 400;
}


.section {
    padding: 4rem 0;
}

.bg-light {
    background-color: var(--bg-light);
}

.section h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    text-align: center;
    color: var(--text-dark);
}

/* Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}


.card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.15);
}

.card.featured {
    border: 3px solid var(--primary-color);
    transform: scale(1.05);
}

.card h3 {
    color: #1e40af;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 600;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    margin: 1rem 0;
}

.price-label {
    color: color: #374151;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.card ul {
    list-style: none;
    text-align: left;
    margin-top: 1rem;
}

.card ul li {
    padding: 0.5rem 0;
    color: var(--text-dark);
}

.card ul li::before {
    content: "✓ ";
    color: var(--success-color);
    font-weight: bold;
}

.info-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-left: 4px solid var(--primary-color);
}

.info-card h3 {
    color: #1e40af;
    margin-bottom: 1rem;
    font-weight: 600;
}

.info-card ul {
    list-style: none;
    padding-left: 0;
}

.info-card ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.info-card ul li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.info-box {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 3rem;
}

.info-box h4 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.info-box-title {
    color: #1e40af;
    margin-bottom: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
}
    
.info-box ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

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

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.platform-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: all 0.3s;
    border-top: 4px solid var(--primary-color);
}

.platform-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.platform-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    font-size: 1.3rem;
}

.platform-type {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.platform-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: background 0.3s, transform 0.2s;
}

.btn:hover {
    background: var(--secondary-color);
    transform: translateY(-2px);
}

.tips-box {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: var(--white);
    border-radius: 12px;
    padding: 2rem;
    margin-top: 3rem;
}

.tips-box-title {
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--white);
}
    
.tips-box h4 {
    margin-bottom: 1.5rem;
    font-size: 1.4rem;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.tips-grid div {
    background: rgba(255,255,255,0.1);
    padding: 1rem;
    border-radius: 8px;
    backdrop-filter: blur(10px);
}

.resources {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.resource-card {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.resource-card h3 {
    color: #1e40af;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.resource-card ul {
    list-style: none;
}

.resource-card ul li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.resource-card ul li:last-child {
    border-bottom: none;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
}

footer p {
    margin: 0.5rem 0;
}

.disclaimer {
    font-size: 0.85rem;
    opacity: 0.7;
    margin-top: 1rem;
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    .hero h2 {
        font-size: 1.8rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .grid,
    .grid-2,
    .platforms-grid {
        grid-template-columns: 1fr;
    }

    .card.featured {
        transform: scale(1);
    }

    .section {
        padding: 2rem 0;
    }

    .price {
        font-size: 2rem;
    }
}

.accordion-item {
    background: var(--white);
    border-radius: 8px;
    margin-bottom: 1rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
    overflow: hidden;
    transition: all 0.3s ease;
}

.accordion-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

.accordion-header {
    background: linear-gradient(135deg, #2563eb 0%, #1e40af 100%);
    color: var(--white);
    padding: 1.5rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.accordion-header:hover {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
}

.accordion-header .step-number {
    background: rgba(255,255,255,0.2);
    width: 35px;
    height: 35px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: 1rem;
    font-weight: 700;
}

.accordion-icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(180deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.accordion-item.active .accordion-content {
    max-height: 1000px;
    padding: 2rem;
}

.accordion-content-inner {
    line-height: 1.8;
}

.accordion-content-inner h4 {
    color: #1e40af;
    margin-bottom: 0.5rem;
    margin-top: 1rem;
    font-size: 1.1rem;
    font-weight: 600;
}

.accordion-content-inner h4:first-child {
    margin-top: 0;
}

.accordion-content-inner p {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.accordion-content-inner ul {
    list-style: none;
    padding-left: 0;
    margin-bottom: 1rem;
}

.accordion-content-inner ul li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-dark);
}

.accordion-content-inner ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.accordion-content-inner .warning {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
}

.accordion-content-inner .tip {
    background: #dbeafe;
    border-left: 4px solid #3b82f6;
    padding: 1rem;
    border-radius: 6px;
    margin-top: 1rem;
}

html {
    scroll-behavior: smooth;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card,
.info-card,
.platform-card {
    animation: fadeIn 0.6s ease-out;
}