:root {
    --neon-green: #ccff00;
    --dark: #0a0a0a;
    --card: #1a1a1a;
    --white: #ffffff;
    --gray: #888;
}

* { margin:0; padding:0; box-sizing: border-box; }
body { font-family: 'Inter', sans-serif; background: var(--dark); color: var(--white); scroll-behavior: smooth; }

/* NAV */
nav { display: flex; justify-content: space-between; align-items: center; padding: 20px 5%; background: rgba(0,0,0,0.9); position: fixed; width: 100%; top: 0; z-index: 1000; }
.logo { font-family: 'Montserrat'; font-size: 1.5rem; font-weight: 800; }
.logo span { color: var(--neon-green); }
.nav-links { list-style: none; display: flex; align-items: center; }
.nav-links li { margin-left: 30px; }
.nav-links a { text-decoration: none; color: white; font-size: 0.9rem; font-weight: 600; transition: 0.3s; }
.nav-links a:hover { color: var(--neon-green); }
.nav-btn { background: var(--neon-green); color: black !important; padding: 8px 20px; border-radius: 4px; }

/* HERO */
.hero { height: 100vh; display: flex; align-items: center; justify-content: center; text-align: center; background: linear-gradient(rgba(0,0,0,0.6), var(--dark)), url('https://images.unsplash.com/photo-1540497077202-7c8a3999166f?q=80&w=2070'); background-size: cover; background-position: center; }
.hero-content { max-width: 900px; padding: 0 20px; }
.badge { color: var(--neon-green); border: 1px solid var(--neon-green); padding: 5px 15px; border-radius: 50px; text-transform: uppercase; font-size: 0.7rem; letter-spacing: 2px; }
.hero h1 { font-family: 'Montserrat'; font-size: 4.5rem; text-transform: uppercase; line-height: 1; margin: 20px 0; }
.hero h1 span { color: var(--neon-green); }
.hero p { color: var(--gray); font-size: 1.1rem; margin-bottom: 40px; }
.btn-primary { background: var(--neon-green); color: black; padding: 15px 35px; text-decoration: none; font-weight: 800; border-radius: 4px; margin: 10px; display: inline-block; transition: 0.3s; }
.btn-secondary { border: 1px solid white; color: white; padding: 15px 35px; text-decoration: none; font-weight: 800; border-radius: 4px; margin: 10px; display: inline-block; }

/* SERVICES */
.services { padding: 100px 5%; text-align: center; }
.service-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; margin-top: 50px; }
.service-card { background: var(--card); padding: 40px; border-radius: 10px; transition: 0.3s; border: 1px solid #222; }
.service-card:hover { border-color: var(--neon-green); transform: translateY(-10px); }
.service-card i { font-size: 2.5rem; color: var(--neon-green); margin-bottom: 20px; }

/* FORM */
.form-section { padding: 100px 5%; background: #111; }
.form-container { display: grid; grid-template-columns: 1fr 2fr; gap: 50px; max-width: 1100px; margin: 0 auto; }
.assessment-form { background: var(--card); padding: 40px; border-radius: 10px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 15px; }
input, select, textarea { width: 100%; padding: 12px; background: #0a0a0a; border: 1px solid #333; color: white; border-radius: 4px; }
.medical-section { margin: 20px 0; }
.checkbox-group { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 10px; font-size: 0.9rem; }
.btn-submit { width: 100%; padding: 15px; background: var(--neon-green); border: none; font-weight: 800; cursor: pointer; border-radius: 4px; margin-top: 20px; }

@media (max-width: 768px) {
    .hero h1 { font-size: 2.5rem; }
    .form-container { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
}

/* GALLERY STYLING */
.gallery-section { padding: 100px 5%; background: var(--dark); }
.sub-title { color: var(--neon-green); text-transform: uppercase; letter-spacing: 2px; font-size: 0.8rem; display: block; margin-bottom: 10px; text-align: center; }

.gallery-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.transformation-card {
    background: var(--card);
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid #222;
    transition: 0.4s;
}

.transformation-card:hover { border-color: var(--neon-green); transform: scale(1.02); }

.image-box { position: relative; height: 350px; overflow: hidden; }
.image-box img { width: 100%; height: 100%; object-fit: cover; filter: grayscale(30%); }

.label-before, .label-after {
    position: absolute; bottom: 10px; padding: 5px 15px;
    font-size: 0.7rem; font-weight: 800; text-transform: uppercase;
}
.label-before { left: 10px; background: rgba(0,0,0,0.7); color: white; }
.label-after { right: 10px; background: var(--neon-green); color: black; }

.transformation-info { padding: 25px; }
.transformation-info h3 { font-family: 'Montserrat'; color: var(--neon-green); margin-bottom: 10px; }
.stat { font-size: 0.9rem; margin-bottom: 5px; color: var(--gray); }
.stat span { color: white; font-weight: 600; }
.testimonial { margin-top: 15px; font-style: italic; font-size: 0.85rem; border-left: 2px solid var(--neon-green); padding-left: 10px; }

/* Update your existing .gallery-container */
.gallery-container {
    display: flex;
    overflow-x: auto;
    gap: 20px;
    padding: 20px 0;
    scrollbar-width: thin;
    scrollbar-color: var(--neon-green) transparent;
}

.transformation-card {
    min-width: 320px; /* Ensures it looks good on mobile sliders */
}

/* DESKTOP STYLES (Default) */
.assessment-form {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.form-row {
    display: flex;
    gap: 15px;
}

.form-row input, .form-row select {
    flex: 1; /* Makes them equal width in a row */
}

/* MOBILE "SHRINK" STYLES */
@media screen and (max-width: 768px) {
    .form-row {
        flex-direction: column; /* Stacks inputs vertically */
        gap: 10px;
    }
    
    .metrics {
        display: grid;
        grid-template-columns: 1fr 1fr; /* Age/Weight side-by-side even on mobile */
    }
    
    .checkbox-group {
        grid-template-columns: 1fr; /* Stack medical options for easier tapping */
    }

    .btn-submit {
        padding: 18px; /* Bigger button for easier thumb tapping */
        font-size: 1.1rem;
    }
}

/* Container for the form */
.form-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Row logic: 2 columns on Desktop */
.form-row {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row input, .form-row select {
    flex: 1;
    width: 100%;
}

/* --- MOBILE OPTIMIZATION --- */
@media screen and (max-width: 600px) {
    /* Stacks name/email and phone/goal into single columns */
    .form-row {
        flex-direction: column; 
        gap: 10px;
        margin-bottom: 10px;
    }

    /* Keep metrics (Age, Wt, Ht) small so they fit in one row even on mobile */
    .form-row.metrics {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 8px;
    }

    /* Shrink padding for mobile so it doesn't look bulky */
    .assessment-form {
        padding: 20px;
    }

    /* Checkbox group stacks to be easier to tap with thumbs */
    .checkbox-group {
        display: grid;
        grid-template-columns: 1fr; 
        gap: 12px;
    }
}

/* --- NAVIGATION BASE --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: rgba(10, 10, 10, 0.95);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #222;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--white);
    font-weight: 600;
    font-size: 0.9rem;
    transition: 0.3s;
}

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

.nav-btn {
    background: var(--neon-green);
    color: black !important;
    padding: 10px 20px;
    border-radius: 4px;
}

/* --- MOBILE RESPONSIVE LOGIC --- */
.menu-toggle {
    display: none; /* Hidden on desktop */
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    background-color: var(--white);
    transition: 0.3s;
}

@media screen and (max-width: 768px) {
    .menu-toggle {
        display: block; /* Show hamburger on mobile */
    }

    .nav-links {
        position: absolute;
        top: 70px; /* Right below the navbar */
        left: -100%; /* Hidden off-screen by default */
        flex-direction: column;
        background-color: var(--dark);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 40px 0;
        border-bottom: 1px solid var(--neon-green);
    }

    .nav-links.active {
        left: 0; /* Slides into view */
    }

    .nav-links li {
        margin: 20px 0;
    }
    
    /* Animation for Hamburger to 'X' */
    .menu-toggle.is-active .bar:nth-child(2) { opacity: 0; }
    .menu-toggle.is-active .bar:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .menu-toggle.is-active .bar:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
}