:root {
    --primary-color: #037CBF;
    --secondary-color: #0FAB44;
    --orange: #FF9C09;
    --white: #FFFFFF;
    --black: #000000;
    --light-gray: #DDDDDD;
    --dark-gray: #555454;
    --gray: #9A9A9A;
    --grey: #F4F4F9;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--black);
}

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.main-content {
    margin-top: 90px; /* prevents header overlap */
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--primary-color);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--primary-color);
}

/* Hero Section */
.hero-section {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    color: var(--white);
}

    .hero-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.3);
    }

.hero-content {
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

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

.hero-btn {
    padding: 14px 28px;
    border-radius: 50px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: 0.3s ease;
}

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

    .hero-btn-primary:hover {
        transform: translateY(-2px);
    }

/* Sections */
.features-section,
.how-it-works,
.download-section {
    padding: 80px 0;
}

.features-section {
    background: var(--grey);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: 0.3s;
}

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

/* Footer */
.footer {
    background: var(--dark-gray);
    color: var(--white);
    padding: 40px 0;
}

.social-link {
    color: var(--light-gray);
    text-decoration: none;
    margin-right: 10px;
}

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

/* Screenshots Slider */
.screenshots-container {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.screenshots-slider {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 310px;
    height: 540px;
    overflow: hidden;
}

.screenshots-track {
    display: flex;
    transition: transform 0.6s ease;
    height: 100%;
}

.screenshot-slide {
    min-width: 100%;
}

.screenshot-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.dot {
    height: 12px;
    width: 12px;
    margin: 0 6px;
    background: rgba(255,255,255,0.5);
    border-radius: 50%;
    display: inline-block;
    cursor: pointer;
}

    .dot.active {
        background: var(--primary-color);
    }

/* Mobile */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
    }

    .main-content {
        margin-top: 80px;
    }
}