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

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; color: var(--black); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

.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); 
}

.nav { display: flex; justify-content: space-between; align-items: center; }

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
    align-items: center;
}

.nav-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--orange);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a:hover {
    color: var(--secondary-color);
}

.hero-section { 
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

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

.hero-title {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.hero-btn {
    padding: 18px 35px;
    border: none;
    border-radius: 50px;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    transition: all 0.4s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.25);
}

.hero-btn-primary {
    background: linear-gradient(45deg, var(--orange), #ffb347);
    color: var(--white);
}

.hero-btn-secondary {
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    backdrop-filter: blur(10px);
}

.features-section { padding: 80px 0; background: var(--grey); }
.features-section h2 { text-align: center; font-size: 2.5rem; margin-bottom: 1rem; color: var(--primary-color); }
.section-subtitle { text-align: center; font-size: 1.2rem; margin-bottom: 3rem; color: var(--gray); }
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-card { background: var(--white); padding: 2rem; border-radius: 12px; text-align: center; box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); transition: transform 0.3s; }
.feature-card:hover { transform: translateY(-5px); }
.feature-icon { width: 60px; height: 60px; background: transparent !important; border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 1rem; font-size: 1.5rem; }
.feature-card h3 { color: var(--primary-color); margin-bottom: 1rem; }

.how-it-works { padding: 80px 0; background: var(--white); }
.how-it-works h2 { text-align: center; font-size: 2.5rem; margin-bottom: 3rem; color: var(--primary-color); }
.steps-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; }
.step { text-align: center; padding: 2rem; }
.step-number { width: 60px; height: 60px; background: var(--secondary-color); color: var(--white); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; font-weight: bold; margin: 0 auto 1rem; }

.download-section { padding: 80px 0; background: var(--primary-color); color: var(--white); text-align: center; }
.download-section h2 { font-size: 2.5rem; margin-bottom: 1rem; }

.footer { background: var(--dark-gray); color: var(--white); padding: 40px 0; }
.footer-brand img { filter: brightness(0) invert(1); }
.social-link { color: var(--light-gray); text-decoration: none; transition: color 0.3s ease; }
.social-link:hover { color: var(--primary-color); }
.social-link i { margin-right: 8px; }

.screenshots-section { background: var(--grey); }
.screenshots-container { max-width: 800px; margin: 0 auto; position: relative; }
.mobile-frame { position: relative; z-index: 10; text-align: center; }
.frame-image { max-width: 350px; height: auto; }
.default-frame { width: 350px; height: 700px; background: #333; border-radius: 35px; margin: 0 auto; border: 10px solid #000; }
.screenshots-slider { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width:310px; height: 540px; overflow: hidden; z-index: 5; box-shadow: inset 0 0 20px rgba(0,0,0,0.1); }
.screenshots-track { display: flex; transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94); height: 100%; }
.screenshot-slide { min-width: 100%; height: 100%; display: flex; align-items: center; justify-content: center; }
.screenshot-image { width: 96%; height: 100%; object-fit: fill; }
.screenshot-dots { margin-top: 4rem; position: relative; z-index: 15; }
.dot { height: 15px; width: 15px; margin: 0 8px; background-color: rgba(255,255,255,0.5); border-radius: 50%; display: inline-block; cursor: pointer; transition: all 0.3s ease; box-shadow: 0 2px 8px rgba(0,0,0,0.2); }
.dot.active { background-color: var(--primary-color); transform: scale(1.2); box-shadow: 0 4px 12px rgba(3, 124, 191, 0.4); }
.dot:hover { background-color: var(--secondary-color); transform: scale(1.1); }

@media (max-width: 991px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 80px;
        left: 0;
        width: 100%;
        background: white;
        padding: 1rem 2rem;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        gap: 1rem;
    }
    .nav-links.open {
        display: flex;
    }
}