:root {
    --primary: #FF7F50; /* Coral */
    --dark: #ffffff;    /* Sfondo principale (Bianco) */
    --light: #222222;   /* Testo principale (Scuro) */
    --gray: #f5f5f5;    /* Sfondo secondario (Grigio Chiaro) */
    --text-gray: #555555;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.smartwatch-screenshot {
    width: 300px;
}
body {
    background-color: var(--dark);
    color: var(--light);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    padding: 20px 0;
    border-bottom: 1px solid var(--gray);
}

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

.branding {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.header-logo {
    height: 20px;
    width: auto;
    margin-bottom: 5px;
}

nav a {
    color: var(--light);
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

.btn-nav {
    background: var(--primary);
    padding: 8px 15px;
    border-radius: 20px;
    color: var(--dark) !important;
}

/* Hamburger Menu Button (Hidden on Desktop) */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--light);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    text-align: center;
}
.hero h2 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: var(--primary);
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-gray);
    margin-bottom: 40px;
}

.buttons .btn {
    display: inline-block;
    padding: 12px 30px;
    margin: 0 10px;
    margin-top: 10px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: transform 0.2s;
}

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

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

.btn-secondary {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

/* Watch Mockup (CSS Only) */
.watch-mockup {
    width: 200px;
    height: 200px;
    background: #000;
    border: 10px solid #333;
    border-radius: 50%;
    margin: 50px auto 0;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(76, 175, 80, 0.2);
}

.screen {
    text-align: center;
}

.recording { display: block; color: var(--primary); font-size: 0.8rem; margin-bottom: 10px; }
.count { display: block; color: white; font-size: 3rem; line-height: 1; font-weight: bold; }
.label { display: block; color: #888; font-size: 0.9rem; }

/* Features */
.features {
    padding: 60px 0;
    background-color: var(--gray);
}

.features h3, .calibration h3, .donate h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.card {
    background: var(--dark);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.card i {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 20px;
}

/* Calibration Table */
.calibration {
    padding: 60px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
    background: var(--dark);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background-color: var(--primary);
    color: white;
}

/* Donate */
.donate {
    padding: 80px 0;
    text-align: center;
    background: linear-gradient(45deg, #FF7F50, #FF6347);
    color: white;
}

.btn-donate {
    display: inline-block;
    margin-top: 20px;
    padding: 15px 40px;
    background: white;
    color: var(--primary);
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
}

footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 0.9rem;
}

/* --- RESPONSIVE DESIGN (Mobile) --- */
@media (max-width: 768px) {
    .menu-toggle {
        display: block; /* Mostra il bottone hamburger */
    }

    header .container {
        position: relative;
    }

    nav {
        display: none; /* Nascondi menu di default su mobile */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--dark);
        flex-direction: column;
        padding: 20px 0;
        box-shadow: 0 5px 10px rgba(0,0,0,0.1);
        z-index: 1000;
        text-align: center;
    }

    nav.active {
        display: flex; /* Mostra quando attivo */
    }

    nav a {
        display: block;
        margin: 15px 0;
        margin-left: 0;
    }

    .hero h2 {
        font-size: 2.2rem;
    }

    .hero-content {
        padding: 0 10px;
    }
      .branding h1 {
    font-size: 1.5rem;
}
.smartwatch-screenshot {
    width: 200px;
}
.hero {
    padding: 20px 0;
}
}