:root {
    --primary-color: #004AAD; /* Tmavá Modrá (Důvěra) */
    --accent-color: #4AD900; /* Zářivá Zelená (Krypto, Bezpečnost) */
    --bg-dark: #212129; /* Tmavé Pozadí pro Cloud */
    --bg-light: #ffffff;
    --text-light: #f0f0f0;
    --text-dark: #333333;
    --red-color: #dc3545; /* Pro zvýraznění výkonu/rakety */
}

/* --- Globální Styly --- */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Poppins', sans-serif; line-height: 1.6; background-color: var(--bg-dark); color: var(--text-light); }
.container { width: 90%; max-width: 1200px; margin: 0 auto; padding: 20px 0; }
a { color: var(--accent-color); text-decoration: none; transition: color 0.3s; }
a:hover { color: #37a800; }

/* --- Header --- */
.header { background-color: #1a1a23; border-bottom: 2px solid var(--primary-color); }
.header .container { display: flex; justify-content: space-between; align-items: center; padding: 15px 0; }
.header h1 { font-size: 28px; font-weight: 700; color: var(--text-light); }
.header h1 span { color: var(--primary-color); font-weight: 300; }
.header nav a { color: var(--text-light); margin-left: 25px; font-weight: 500; opacity: 0.8; }
.header nav a:hover { color: var(--accent-color); opacity: 1; }

/* --- CTA Tlačítka --- */
.cta-button { display: inline-block; background-color: var(--primary-color); color: var(--text-light); padding: 12px 30px; border-radius: 5px; font-weight: 600; transition: background-color 0.3s, transform 0.2s; border: none; }
.cta-button:hover { background-color: #003d8f; transform: translateY(-2px); }
.primary-cta { background-color: var(--accent-color); color: var(--bg-dark); }
.primary-cta:hover { background-color: #37a800; }

/* --- Hero Sekce --- */
.hero-section { padding: 100px 0; text-align: center; background: url('cloud-bg.jpg') no-repeat center center; background-size: cover; }
.hero-section .tagline { font-size: 14px; letter-spacing: 2px; text-transform: uppercase; color: var(--accent-color); margin-bottom: 10px; }
.hero-section h2 { font-size: 48px; font-weight: 700; margin-bottom: 20px; line-height: 1.2; color: var(--text-light); }
.hero-section .description { font-size: 18px; max-width: 700px; margin: 0 auto 30px; color: #a0a0a0; }

/* --- Ceny (Pricing) Sekce --- */
.pricing-section { padding: 80px 0; background-color: var(--bg-dark); text-align: center; }
.pricing-section h3 { font-size: 32px; margin-bottom: 40px; color: var(--text-light); }

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.pricing-box {
    background-color: #2a2a35;
    padding: 30px;
    border-radius: 10px;
    border: 1px solid #3c3c4a;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s, border-color 0.3s;
    display: flex;
    flex-direction: column;
}
.pricing-box:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
}

.pricing-box.featured {
    border-color: var(--accent-color);
    border-width: 2px;
}

.pricing-box.ultra {
    border: 3px solid var(--red-color);
    box-shadow: 0 0 20px rgba(220, 53, 69, 0.3);
}

.pricing-box i {
    font-size: 36px;
    margin-bottom: 10px;
}
.icon-blue { color: var(--primary-color); }
.icon-green { color: var(--accent-color); }
.icon-red { color: var(--red-color); }

.pricing-box h4 {
    font-size: 24px;
    margin-bottom: 5px;
    color: var(--text-light);
}

.pricing-box .target-group {
    font-size: 14px;
    color: #999;
    margin-bottom: 15px;
}

.price-value {
    font-size: 42px;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 20px;
    border-bottom: 1px dashed #3c3c4a;
    padding-bottom: 15px;
}
.price-value span {
    font-size: 18px;
    font-weight: 400;
    color: #999;
}

.features-list {
    list-style: none;
    text-align: left;
    margin-bottom: 25px;
    flex-grow: 1;
}
.features-list li {
    padding: 8px 0;
    color: #bbb;
}
.features-list i {
    font-size: 16px;
    margin-right: 10px;
    color: var(--primary-color);
}
.pricing-box.featured .features-list i {
    color: var(--accent-color);
}

.box-cta {
    margin-top: auto;
}
.box-cta.secondary-cta {
    background-color: #3c3c4a;
    color: var(--text-light);
}
.box-cta.secondary-cta:hover {
    background-color: #505060;
}

/* --- USP Sekce --- */
.usp-section {
    padding: 80px 0;
    background-color: #1a1a23;
    text-align: center;
}
.usp-section h3 {
    font-size: 32px;
    margin-bottom: 40px;
    color: var(--text-light);
}
.usp-grid {
    display: flex;
    justify-content: space-around;
    gap: 30px;
}
.usp-item {
    flex-basis: 30%;
    padding: 20px;
    border-radius: 10px;
    background-color: #2a2a35;
}
.usp-item h4 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--text-light);
}
.usp-item p {
    color: #bbb;
    font-size: 15px;
}
.usp-item i {
    font-size: 40px;
    margin-bottom: 15px;
}

/* --- Kontaktní Sekce a Footer --- */
.contact-section { padding: 60px 0; text-align: center; background-color: var(--bg-dark); }
.contact-section h3 { color: var(--text-light); margin-bottom: 20px; }
.contact-info-text { color: #a0a0a0; max-width: 600px; margin: 0 auto 30px; }
.contact-mail-button { font-size: 18px; padding: 15px 40px; }
.contact-email-display { margin-top: 20px; color: var(--primary-color); }

.footer { padding: 30px 0; text-align: center; background-color: #1a1a23; border-top: 1px solid #3c3c4a; }
.footer p { color: #777; font-size: 0.9em; }

/* --- Responzivita --- */
@media (max-width: 992px) {
    .usp-grid { flex-direction: column; }
    .usp-item { flex-basis: 100%; margin-bottom: 20px; }
}
@media (max-width: 768px) {
    .hero-section h2 { font-size: 36px; }
    .pricing-grid { grid-template-columns: 1fr; }
}