:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --text-main: #111827;
    --text-muted: #4b5563;
    --bg-main: #ffffff;
    --bg-sec: #f8fafc;
    --card-bg: #ffffff;
    --accent: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-main);
    background-color: var(--bg-main);
    line-height: 1.6;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Hero Section */
.hero {
    background-color: var(--bg-sec);
    padding: 100px 0 80px;
    text-align: center;
    border-bottom: 1px solid #e2e8f0;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 20px;
    letter-spacing: -1px;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 25px;
}

.hero .description {
    font-size: 1.25rem;
    max-width: 700px;
    margin: 0 auto 40px auto;
    color: var(--text-muted);
}

.cta-button {
    display: inline-block;
    background-color: var(--primary);
    color: white;
    padding: 20px 40px;
    border-radius: 12px;
    font-size: 1.25rem;
    font-weight: 800;
    text-decoration: none;
    text-transform: uppercase;
    transition: all 0.3s ease;
    box-shadow: 0 10px 20px -5px rgba(79, 70, 229, 0.4);
}

.cta-button:hover {
    background-color: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 15px 25px -5px rgba(79, 70, 229, 0.5);
}

.cta-button.large {
    font-size: 1.4rem;
    padding: 22px 50px;
}

.secure-checkout {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #10b981;
    font-weight: 600;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}
.pulse {
    animation: pulse 2s infinite;
}

/* Problem Agitation Section */
.problem-agitation {
    padding: 80px 0;
    background-color: var(--bg-main);
    text-align: center;
}

.problem-agitation h2 {
    font-size: 2.2rem;
    margin-bottom: 25px;
    color: var(--text-main);
    line-height: 1.3;
}

.problem-agitation h2 strong {
    color: #ef4444;
}

.problem-agitation p {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto;
    color: var(--text-muted);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--bg-sec);
    border-top: 1px solid #e2e8f0;
    border-bottom: 1px solid #e2e8f0;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: var(--text-main);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.card {
    background-color: var(--card-bg);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
    border: 1px solid #e2e8f0;
    text-align: center;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-main);
}

.card p {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* For Who Section */
.for-who {
    padding: 80px 0;
    background-color: var(--bg-main);
}

.for-who h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
}

.check-list {
    list-style: none;
    max-width: 700px;
    margin: 0 auto;
    background: var(--bg-sec);
    padding: 40px;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
}

.check-list li {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-main);
    display: flex;
    align-items: flex-start;
}
.check-list li:last-child {
    margin-bottom: 0;
}

/* Bottom CTA */
.bottom-cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
    color: white;
}

.bottom-cta h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: white;
}

.bottom-cta p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto 40px auto;
    opacity: 0.9;
}

.bottom-cta .cta-button {
    background-color: #ffffff;
    color: var(--primary-dark);
}

.bottom-cta .cta-button:hover {
    background-color: #f8fafc;
}

.cards-accepted {
    margin-top: 20px;
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Footer */
footer {
    background-color: #0f172a;
    color: #94a3b8;
    text-align: center;
    padding: 40px 0;
}

.footer-links {
    margin-top: 10px;
    font-size: 0.9rem;
}

.footer-links a {
    color: #94a3b8;
    text-decoration: none;
}

.footer-links a:hover {
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .hero .subtitle { font-size: 1.3rem; }
    .hero .description { font-size: 1.1rem; }
    .problem-agitation h2 { font-size: 1.8rem; }
    .bottom-cta h2 { font-size: 2rem; }
}