:root {
    --primary-color: #2962ff;
    --secondary-color: #0039cb;
    --accent-color: #768fff;
    --dark-color: #1a1a2e;
    --light-color: #f5f5f7;
    --text-color: #333;
    --success-color: #4caf50;
    
    --spacing-vsm: 6px;
    --spacing-sm: 12px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 72px;
    
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Montserrat', sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--light-color);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Roboto', sans-serif;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-sm);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

/* Buttons */
.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--box-shadow);
    text-decoration: none;
    display: block;
}

.cta-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    text-align: center;
    padding: var(--spacing-xl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('data:image/svg+xml;charset=utf8,%3Csvg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"%3E%3Cpath fill="%23ffffff" fill-opacity="0.1" d="M0,96L48,112C96,128,192,160,288,160C384,160,480,128,576,122.7C672,117,768,139,864,149.3C960,160,1056,160,1152,138.7C1248,117,1344,75,1392,53.3L1440,32L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z"%3E%3C/path%3E%3C/svg%3E');
    background-size: cover;
    background-position: center;
    opacity: 0.2;
    z-index: 0;
}

.hero h1 {
    color: white;
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

.hero__features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    position: relative;
    z-index: 1;
}

.hero .feature {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    flex: 1 1 300px;
    max-width: 350px;
    text-align: left;
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero .feature:hover {
    transform: translateY(-5px);
    background-color: rgba(255, 255, 255, 0.15);
}

.hero .feature i {
    font-size: 1.8rem;
    color: white;
}

.hero__button {
    position: relative;
    z-index: 1;
    margin: 0 auto;
}

/* Demo Section */
.demo {
    background-color: white;
}

.demo__tabs {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.tab-button {
    background: none;
    border: none;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: 'Roboto', sans-serif;
    font-weight: 500;
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    color: var(--text-color);
}

.tab-button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.tab-button.active {
    color: var(--primary-color);
}

.tab-button.active::after {
    width: 80%;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.5s ease forwards;
}

.demo__case {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.demo__phone {
    width: 280px;
    height: 500px;
    background-color: #111;
    border-radius: 30px;
    padding: 10px;
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.phone-screen {
    background-color: #f5f5f7;
    width: 100%;
    height: 100%;
    border-radius: 20px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
}

.message-bubble {
    background-color: #e5e5ea;
    align-self: flex-start;
    padding: var(--spacing-sm);
    border-radius: 18px;
    margin-bottom: var(--spacing-sm);
    max-width: 80%;
    animation: slideIn 0.5s ease forwards;
}

.message-bubble.admin {
    background-color: var(--primary-color);
    color: white;
    align-self: flex-end;
}

/* How it works */
.how-it-works {
    background-color: var(--light-color);
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 800px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.step__number {
    background-color: var(--primary-color);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step__list {
    list-style: none;
    margin-top: var(--spacing-sm);
}

.step__list li {
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
}

.step__list i {
    color: var(--success-color);
}

.result {
    margin-top: var(--spacing-lg);
    background-color: var(--accent-color);
    color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.result h3 {
    color: white;
    margin-bottom: var(--spacing-vsm);
}

/* Benefits */
.benefits {
    background-color: white;
}

.benefits__grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.benefit {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    background-color: var(--light-color);
    transition: var(--transition);
}

.benefit:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow);
}

.benefit__problem {
    font-weight: 600;
    color: var(--dark-color);
}

.benefit__solution {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.benefit__solution i {
    color: var(--primary-color);
    margin-top: 5px;
}

/* Features */
.features {
    background-color: var(--light-color);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    background-color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    height: 100%;
    box-shadow: var(--box-shadow);
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
}

/* Pricing */
.pricing {
    background-color: var(--color-bg-light);
}
.pricing__content {
    max-width: 600px;
    margin: 0 auto;
}
.price-card {
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    padding: var(--spacing-lg);
    background: white;
}
.price-old {
    text-decoration: line-through;
    color: #888;
    font-size: 24px;
    margin-bottom: var(--spacing-vsm);
}
.price-new {
    text-align: center;
    color: var(--primary-color);
    font-size: 40px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}
.price-description {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: var(--spacing-md);
}
.price-description span {
    font-style: italic;
    font-weight: 400;
}
.price-features {
    margin-bottom: var(--spacing-lg);
}
.price-feature {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    text-align: left;
}
.price-feature i {
    color: var(--primary-color);
    margin-right: var(--spacing-sm);
    font-size: 22px;
}

/* Steps to Connect */
.steps-to-connect {
    background-color: var(--light-color);
}

.connect-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.connect-step {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    background-color: white;
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.connect-step:hover {
    transform: translateX(5px);
    box-shadow: var(--box-shadow);
}

.connect-step__number {
    background-color: var(--primary-color);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.steps__button {
    display: block;
    margin: 0 auto;
}

/* Footer */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: var(--spacing-lg) 0;
}

.footer__content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    text-align: center;
}

.footer__name, .footer__inn {
    font-size: 14px;
    margin: 0;
    color: #888;
}

.footer__btn {
    color: white;
}

.footer__btn:hover {
    color: var(--primary-color);
}

.footer .logo {
    color: white;
}

.footer__button {
    margin-top: var(--spacing-sm);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Responsive */
@media (max-width: 768px) {
    section {
        padding: var(--spacing-lg) 0;
    }
    h1 {
        font-size: 2rem;
        line-height: 1.4;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .hero__features {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }
    
    .hero .feature {
        max-width: 100%;
        flex: 1 1 180px;
    }
    
    .pricing__header,
    .pricing__row {
        grid-template-columns: 1fr 1fr 1fr;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding-bottom: var(--spacing-lg);
        padding-top: var(--spacing-md);
    }
    .hero h1 {
        margin-bottom: var(--spacing-md);
    }
    .demo__tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .pricing__header,
    .pricing__row {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(3, auto);
        gap: var(--spacing-vsm);
    }
    
    .pricing__header div,
    .pricing__row div {
        padding: var(--spacing-vsm) 0;
    }
    
    .pricing__header div:not(:last-child),
    .pricing__row div:not(:last-child) {
        border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    }

    .connect-steps {
        gap: var(--spacing-sm);
    }
}