:root {
    --color-deep-navy: #1B365D;
    --color-cobalt: #0056b3;
    --color-cobalt-light: #0066cc;
    --color-cobalt-dark: #004494;
    --color-white: #ffffff;
    --color-gray-light: #f8f9fa;
    --color-gray: #6c757d;
    --color-success: #28a745;
    --color-success-light: #34ce57;
    --color-success-dark: #218838;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 48px;
    --spacing-xxl: 96px;
}

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

body {
    font-family: var(--font-main);
    color: var(--color-deep-navy);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.header {
    background: var(--color-white);
    box-shadow: 0 2px 10px rgba(27, 54, 93, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo-img {
    height: 50px;
    width: auto;
}

.logo-img-small {
    height: 35px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-deep-navy);
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--color-cobalt);
}

.nav-buttons {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    cursor: pointer;
}

.btn-ghost {
    color: var(--color-cobalt);
    border-color: var(--color-cobalt);
    background: transparent;
}

.btn-ghost:hover {
    background: var(--color-cobalt);
    color: var(--color-white);
}

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

.btn-primary:hover {
    background: var(--color-cobalt-dark);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
}

.btn-success:hover {
    background: var(--color-success-dark);
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

.hero {
    background: linear-gradient(135deg, var(--color-deep-navy) 0%, var(--color-cobalt) 100%);
    color: var(--color-white);
    padding: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 550px;
}

.hero-secure {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    opacity: 0.8;
}

.icon {
    width: 20px;
    height: 20px;
}

.hero-graphic {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg);
}

.device {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    animation: float 3s ease-in-out infinite;
}

.sensor {
    animation-delay: 0s;
}

.cloud {
    animation-delay: 1.5s;
}

.indicator {
    width: 20px;
    height: 20px;
    background: var(--color-success);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

.cloud-icon {
    width: 60px;
    height: 60px;
    background: var(--color-white);
    border-radius: 8px;
    opacity: 0.9;
}

.data-flow {
    flex: 1;
    height: 4px;
    background: linear-gradient(90deg, var(--color-success) 0%, var(--color-cobalt) 100%);
    position: relative;
    overflow: hidden;
}

.data-flow::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
    animation: flow 2s linear infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-15px);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

@keyframes flow {
    0% {
        left: -100%;
    }
    100% {
        left: 100%;
    }
}

.features {
    padding: var(--spacing-xxl) 0;
    background: var(--color-gray-light);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-deep-navy);
    margin-bottom: var(--spacing-xl);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background: linear-gradient(135deg, var(--color-cobalt) 0%, var(--color-deep-navy) 100%);
    position: relative;
}

.feature-icon.control::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    border: 4px solid var(--color-white);
    border-radius: 8px;
}

.feature-icon.insights::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 35px;
    height: 35px;
    border: 4px solid var(--color-white);
    border-radius: 50%;
}

.feature-icon.insights::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 4px;
    background: var(--color-white);
    border-radius: 50%;
}

.feature-icon.relax::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 4px;
    height: 30px;
    background: var(--color-white);
    border-radius: 2px;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-deep-navy);
}

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

.how-it-works {
    padding: var(--spacing-xxl) 0;
    background: var(--color-white);
}

.steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    position: relative;
}

.steps::before {
    content: '';
    position: absolute;
    top: 60px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: linear-gradient(90deg, var(--color-cobalt) 0%, var(--color-deep-navy) 100%);
    z-index: 0;
}

.step {
    flex: 1;
    text-align: center;
    position: relative;
    z-index: 1;
}

.step-number {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--color-cobalt) 0%, var(--color-deep-navy) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-white);
    box-shadow: 0 8px 16px rgba(27, 54, 93, 0.2);
}

.step-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-deep-navy);
}

.step-content p {
    color: var(--color-gray);
    font-size: 1.05rem;
}

.cta {
    padding: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, var(--color-cobalt) 0%, var(--color-deep-navy) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta h2 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.cta p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
}

.cta-secure {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    font-size: 0.9rem;
    opacity: 0.8;
}

.footer {
    background: var(--color-deep-navy);
    color: var(--color-white);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-tagline {
    margin: var(--spacing-md) 0;
    opacity: 0.8;
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 350px;
}

.newsletter-form input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    font-family: var(--font-main);
}

.newsletter-form input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter-form input:focus {
    outline: none;
    border-color: var(--color-cobalt-light);
}

.footer-links {
    display: flex;
    justify-content: space-around;
}

.link-column h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

.link-column a {
    display: block;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    margin-bottom: var(--spacing-sm);
    transition: color 0.3s ease;
}

.link-column a:hover {
    color: var(--color-white);
}

.footer-social {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--color-white);
    transition: background 0.3s ease;
}

.social-link:hover {
    background: var(--color-cobalt);
}

.social-link svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-subtitle {
        margin: 0 auto var(--spacing-lg);
    }

    .hero-secure {
        justify-content: center;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        gap: var(--spacing-lg);
    }

    .footer-social {
        align-items: center;
    }

    .newsletter-form {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .features-grid {
        grid-template-columns: 1fr;
    }

    .steps {
        flex-direction: column;
    }

    .steps::before {
        display: none;
    }

    .step {
        margin-bottom: var(--spacing-lg);
    }

    .cta h2 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .nav-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .hero-title {
        font-size: 2rem;
    }

    .btn-large {
        padding: 14px 28px;
        font-size: 1rem;
    }
}