:root {
    --primary: #1a365d;
    --secondary: #2b6cb0;
    --accent: #e53e3e;
    --light-bg: #f7fafc;
    --text-dark: #2d3748;
    --white: #ffffff;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    color: var(--text-dark);
    line-height: 1.6;
    background-color: #fff;
}

/* NAVBAR */
header {
    background: var(--primary);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    gap: 1rem;
    max-width: 1320px;
    margin: 0 auto;
}

.logo a {
    color: var(--white);
    text-decoration: none;
    font-size: 1.4rem;
    white-space: nowrap;
}

.logo span {
    font-size: 0.9rem;
    color: #cbd5e0;
}

.nav-links {
    display: flex;
    list-style: none;
    flex-shrink: 0;
    gap: clamp(0.6rem, 1vw, 1rem);
}

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

.nav-links a:hover, .nav-links a.active {
    color: #63b3ed;
}

.btn-demo {
    background: var(--accent);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    white-space: nowrap;
}

@media (max-width: 1100px) {
    .navbar {
        flex-wrap: wrap;
        justify-content: center;
    }

    .nav-links {
        order: 1;
        flex-basis: 100%;
        flex-wrap: wrap;
        justify-content: center;
    }
}

/* HERO */
.hero {
    background: linear-gradient(rgba(26, 54, 93, 0.85), rgba(43, 108, 176, 0.85)), url('https://images.unsplash.com/photo-1523240795612-9a054b0db644?auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 6rem 1rem;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.btn-primary, .btn-secondary {
    padding: 0.8rem 1.5rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
}

.btn-primary { background: var(--accent); color: white; }
.btn-secondary { background: white; color: var(--primary); }

/* SECTIONS */
.section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

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

h2 {
    text-align: center;
    color: var(--primary);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.subtitle {
    text-align: center;
    color: #4a5568;
    margin-bottom: 3rem;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--secondary);
    margin-bottom: 1rem;
}

/* VIDEO */
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 800px;
    margin: 0 auto;
    border-radius: 8px;
}

.video-container iframe {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    border: 0;
}

/* PRICING */
.pricing-grid {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.price-card {
    background: white;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 2.5rem;
    width: 320px;
    text-align: center;
    position: relative;
}

.price-card.featured {
    border: 2px solid var(--accent);
}

.badge {
    position: absolute;
    top: -12px; right: 20px;
    background: var(--accent);
    color: white;
    padding: 0.2rem 0.8rem;
    border-radius: 12px;
    font-size: 0.8rem;
}

.price {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary);
    margin: 1rem 0;
}

.price span { font-size: 1rem; color: #718096; }

.price-card ul {
    list-style: none;
    text-align: left;
}

.price-card li { margin-bottom: 0.8rem; }
.price-card i { color: #38a169; margin-right: 0.5rem; }

/* TUTORIAL PAGE */
.page-header {
    background: var(--primary);
    color: white;
    text-align: center;
    padding: 3rem 1rem;
}

.step-card {
    display: flex;
    gap: 1.5rem;
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.step-number {
    background: var(--secondary);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.demo-box {
    background: #edf2f7;
    padding: 1rem;
    border-radius: 5px;
    margin-top: 0.8rem;
}

/* FAQ */
.faq-container { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 1rem; border-bottom: 1px solid #e2e8f0; }
.faq-question {
    width: 100%;
    text-align: left;
    padding: 1rem;
    background: none;
    border: none;
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--primary);
    display: flex;
    justify-content: space-between;
    cursor: pointer;
}
.faq-answer {
    padding: 0 1rem 1rem 1rem;
    display: none;
    color: #4a5568;
}

/* FOOTER */
footer {
    background: var(--primary);
    color: white;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin-right: 1rem;
    transition: color 0.3s;
}

.social-links a:hover { color: #63b3ed; }
.footer-bottom { text-align: center; border-top: 1px solid #2d3748; padding-top: 1rem; font-size: 0.9rem; }