:root {
    --green: #2ecc71;
    --dark-green: #27ae60;
    --black: #2c3e50;
    --gray: #7f8c8d;
    --light-bg: #f9f9f9;
    --white: #ffffff;
    --shadow: 0 10px 30px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    outline: none; border: none;
    text-decoration: none;
}

html { scroll-behavior: smooth; }

body { background-color: var(--light-bg); color: var(--black); }


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

.btn {
    display: inline-block;
    padding: 10px 30px;
    font-size: 1rem;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.btn-primary { background: var(--green); color: var(--white); }
.btn-primary:hover { background: var(--dark-green); transform: translateY(-3px); box-shadow: 0 5px 15px rgba(46, 204, 113, 0.4); }

.btn-secondary { background: transparent; color: var(--white); border: 2px solid var(--white); margin-left: 10px; }
.btn-secondary:hover { background: var(--white); color: var(--black); }

.btn-outline { background: transparent; border: 2px solid var(--green); color: var(--green); }
.btn-outline:hover { background: var(--green); color: var(--white); }

.heading { text-align: center; font-size: 2.5rem; margin-bottom: 3rem; color: var(--black); }
.heading span { color: var(--green); }

/* --- Header --- */
.header {
    position: fixed; top: 0; left: 0; right: 0;
    z-index: 1000;
    background: transparent;
    padding: 1.5rem 0;
    transition: var(--transition);
}


.header.sticky {
    background: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.logo { font-size: 1.8rem; font-weight: 700; color: var(--white); }
.header.sticky .logo { color: var(--black); }
.logo span { color: var(--green); }

.navbar a { margin: 0 1rem; color: var(--white); font-weight: 400; font-size: 1rem; }
.header.sticky .navbar a { color: var(--black); }
.navbar a:hover { color: var(--green); }

.header-right { display: flex; align-items: center; gap: 20px; }
.user-status { color: var(--green); font-weight: 600; background: rgba(255,255,255,0.1); padding: 5px 15px; border-radius: 20px; }

.menu-btn { display: none; color: var(--white); font-size: 1.5rem; cursor: pointer; }
.header.sticky .menu-btn { color: var(--black); }

/* --- Hero Section --- */
.hero {
    height: 100vh;
    background: url('https://images.unsplash.com/photo-1490818387583-1baba5e638af?ixlib=rb-1.2.1&auto=format&fit=crop&w=1920&q=80') no-repeat center center/cover;
    position: relative;
    display: flex; align-items: center; justify-content: center;
    text-align: center;
}

.hero-overlay {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5); 
}

.hero-content { position: relative; z-index: 1; color: var(--white); max-width: 800px; padding: 0 20px; }
.hero-content h3 { font-size: 1.5rem; font-weight: 300; letter-spacing: 2px; margin-bottom: 10px; }
.hero-content h1 { font-size: 4rem; font-weight: 700; line-height: 1.2; margin-bottom: 20px; }
.hero-content p { font-size: 1.2rem; margin-bottom: 30px; opacity: 0.9; }


.features { padding: 5rem 0; background: var(--white); }
.features-container { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.feature-box { text-align: center; padding: 30px; border-radius: 15px; background: var(--light-bg); transition: var(--transition); }
.feature-box:hover { transform: translateY(-10px); box-shadow: var(--shadow); background: var(--white); }
.icon-box { width: 70px; height: 70px; line-height: 70px; border-radius: 50%; background: rgba(46, 204, 113, 0.1); color: var(--green); font-size: 2rem; margin: 0 auto 20px; }


.menu-section { padding: 5rem 0; background: var(--light-bg); }
.tabs-container { display: flex; justify-content: center; gap: 15px; margin-bottom: 40px; }
.tab-btn { background: transparent; border: 2px solid var(--green); color: var(--green); padding: 10px 30px; border-radius: 30px; font-weight: 600; cursor: pointer; transition: var(--transition); }
.tab-btn.active, .tab-btn:hover { background: var(--green); color: var(--white); }

.menu-content { display: flex; justify-content: center; padding: 0 20px; }
.tab-content { display: none; width: 100%; justify-content: center; gap: 30px; flex-wrap: wrap; }
.tab-content.active { display: flex; }

.food-card {
    background: var(--white); border-radius: 15px; overflow: hidden; box-shadow: var(--shadow); width: 350px;
    transition: var(--transition);
}
.food-card:hover { transform: translateY(-10px); }
.food-img img { width: 100%; height: 200px; object-fit: cover; }
.food-info { padding: 20px; }
.food-info h3 { font-size: 1.4rem; margin-bottom: 10px; }
.food-info .desc { font-size: 0.9rem; color: var(--gray); margin-bottom: 15px; line-height: 1.5; }
.macros { display: flex; justify-content: space-between; font-weight: 600; color: var(--dark-green); border-top: 1px solid #eee; padding-top: 15px; }


.calculator { padding: 5rem 0; background: var(--white); }
.calc-container { max-width: 600px; margin: 0 auto; background: var(--light-bg); padding: 40px; border-radius: 20px; box-shadow: var(--shadow); }
.calc-form { display: grid; gap: 20px; }
.input-group label { display: block; margin-bottom: 5px; font-weight: 600; }
.input-group input, .input-group select { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 8px; font-size: 1rem; }
.calc-result { margin-top: 20px; text-align: center; padding: 20px; background: #dff9fb; border-radius: 10px; border: 1px solid var(--green); }


.pricing { padding: 5rem 0; background: var(--light-bg); }
.price-container { display: flex; justify-content: center; gap: 30px; flex-wrap: wrap; padding: 0 20px; }
.price-card { background: var(--white); padding: 40px 30px; border-radius: 20px; box-shadow: var(--shadow); text-align: center; width: 320px; position: relative; transition: var(--transition); }
.price-card:hover { transform: scale(1.05); }

.price-card.popular { border: 2px solid var(--green); transform: scale(1.05); }
.price-card.popular:hover { transform: scale(1.08); }
.popular-badge { position: absolute; top: -15px; left: 50%; transform: translateX(-50%); background: var(--green); color: var(--white); padding: 5px 20px; border-radius: 20px; font-size: 0.9rem; font-weight: 600; }

.price h3 { font-size: 1.5rem; margin-bottom: 5px; }
.price-header p { color: var(--gray); margin-bottom: 20px; }
.price { font-size: 2.5rem; font-weight: 700; color: var(--black); margin-bottom: 20px; }
.price span { font-size: 1rem; color: var(--gray); font-weight: 400; }

.features-list { list-style: none; margin-bottom: 30px; text-align: left; }
.features-list li { margin-bottom: 10px; color: var(--gray); }
.features-list li i { color: var(--green); margin-right: 10px; }

.footer { background: var(--black); color: var(--white); text-align: center; padding: 20px 0; margin-top: auto; }

.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.6); backdrop-filter: blur(5px); justify-content: center; align-items: center; }
.modal-content { background: var(--white); padding: 40px; border-radius: 20px; text-align: center; width: 90%; max-width: 400px; position: relative; animation: fadeIn 0.4s; }
.modal-icon { font-size: 3rem; color: var(--green); margin-bottom: 20px; }
.close-btn { position: absolute; top: 15px; right: 20px; font-size: 1.5rem; cursor: pointer; color: var(--gray); }

@keyframes fadeIn { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }

@media (max-width: 768px) {
    .menu-btn { display: block; }
    .navbar { position: absolute; top: 100%; left: 0; right: 0; background: var(--white); flex-direction: column; display: none; padding: 20px; box-shadow: 0 5px 10px rgba(0,0,0,0.1); }
    .navbar a { display: block; margin: 10px 0; color: var(--black); text-align: center; }
    .header-right .user-status { display: none; } 
    .hero-content h1 { font-size: 2.5rem; }
    .price-card.popular { transform: scale(1); }
}