/* CSS Variables & Reset */
:root {
    --primary-color: #ff3366; /* Vibrant Valentine Red/Pink */
    --primary-dark: #d62851;
    --text-dark: #1a1a1a;
    --text-light: #f5f5f5;
    --bg-light: #ffffff;
    --bg-dark: #111111;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-light);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Typography Utilities */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    line-height: 1.2;
}

.text-highlight {
    color: var(--primary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    font-size: 1rem;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    box-shadow: 0 0 15px rgba(255, 51, 102, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid white;
    color: white;
}

.btn-outline:hover {
    background-color: white;
    color: var(--text-dark);
}

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

.btn-white:hover {
    background-color: var(--gray-100);
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.2rem;
    text-transform: uppercase;
}

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

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

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    font-family: var(--font-heading);
    letter-spacing: -1px;
}

/* Hero Section */
.hero {
    position: relative;
    height: 90vh; /* Almost full screen */
    min-height: 600px;
    display: flex;
    align-items: center;
    background-image: url('https://images.unsplash.com/photo-1517836357463-d25dfeac3438?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80'); /* Gym background placeholder */
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    margin-top: 60px; /* Offset for fixed navbar */
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0,0,0,0.8) 0%, rgba(255,51,102,0.3) 100%);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    margin: 0 auto;
    max-width: 800px;
}

.badget {
    display: inline-block;
    background-color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.hero h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    font-weight: 300;
    opacity: 0.9;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    font-weight: 500;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.heart-icon {
    display: inline-block;
    animation: heartbeat 1.5s infinite;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    15% { transform: scale(1.3); }
    30% { transform: scale(1); }
    45% { transform: scale(1.15); }
    60% { transform: scale(1); }
}

/* Details Section */
.section-details {
    padding: 6rem 0;
    background-color: var(--gray-100);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h3 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--bg-dark);
}

.section-header p {
    font-size: 1.2rem;
    color: #666;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: white;
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s ease;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.highlight-card {
    border: 2px solid var(--primary-color);
    background: linear-gradient(to bottom right, white, #fff0f5);
}

.card-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.card h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--bg-dark);
}

/* CTA Section */
.section-cta {
    padding: 6rem 0;
    background-color: var(--primary-color);
    background-image: radial-gradient(circle at center, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    text-align: center;
}

.cta-content h3 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
}

.small-text {
    font-size: 0.9rem;
    margin-top: 1rem;
    opacity: 0.7;
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    color: #888;
    padding: 2rem 0;
    text-align: center;
}

.footer p {
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero h2 {
        font-size: 1.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
        max-width: 300px;
        margin: 0 auto;
    }
    
    .cta-content h3 {
        font-size: 2rem;
    }
    
    .navbar .logo {
        font-size: 1.2rem;
    }
    
    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}