/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors - Energetic Fitness Palette */
    --primary-green: #43CB89;
    --primary-orange: #FF6B35;
    --primary-blue: #2D84A1;
    --accent-yellow: #FFB627;
    
    /* Neutral Colors */
    --dark: #1a1a1a;
    --dark-gray: #2f2f2f;
    --medium-gray: #677782;
    --light-gray: #f6f6f6;
    --white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #43CB89 0%, #2D84A1 100%);
    --gradient-warm: linear-gradient(135deg, #FF6B35 0%, #FFB627 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(67, 203, 137, 0.9) 0%, rgba(45, 132, 161, 0.9) 100%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 30px;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-primary);
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
    background: var(--white);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-green);
}

.brand-icon {
    width: 32px;
    height: 32px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0.05;
    z-index: -1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.highlight {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 1rem 2rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-normal);
    text-decoration: none;
}

.btn i {
    width: 20px;
    height: 20px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

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

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

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

.btn-full {
    width: 100%;
    justify-content: center;
}

.hero-stats {
    display: flex;
    gap: var(--spacing-md);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.stat-item i {
    width: 40px;
    height: 40px;
    padding: 8px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-sm);
}

.stat-item div {
    display: flex;
    flex-direction: column;
}

.stat-item strong {
    font-size: 1.5rem;
    color: var(--dark);
}

.stat-item span {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

.hero-image {
    position: relative;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    animation: float 3s ease-in-out infinite;
}

.floating-card i {
    width: 24px;
    height: 24px;
    color: var(--primary-green);
}

.floating-card span {
    font-weight: 600;
    color: var(--dark);
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 1s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Section Styles */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    font-size: 1.25rem;
    color: var(--medium-gray);
}

/* Features Section */
.features {
    background: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.feature-icon i {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.feature-card p {
    color: var(--medium-gray);
    line-height: 1.8;
}

/* Calculator Section */
.calculator-section {
    background: var(--white);
}

.calculator-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    background: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: var(--radius-xl);
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-family: var(--font-primary);
    background: var(--white);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
}

.calculator-results {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.results-placeholder {
    text-align: center;
    color: var(--medium-gray);
}

.results-placeholder i {
    width: 80px;
    height: 80px;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-green);
    opacity: 0.3;
}

.results-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.result-card {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    text-align: center;
}

.result-card h3 {
    font-size: 3rem;
    margin-bottom: var(--spacing-xs);
}

.result-card p {
    opacity: 0.9;
}

.macro-breakdown {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.macro-item {
    background: var(--light-gray);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    text-align: center;
}

.macro-item strong {
    display: block;
    font-size: 1.5rem;
    color: var(--primary-green);
    margin-bottom: var(--spacing-xs);
}

.macro-item span {
    color: var(--medium-gray);
    font-size: 0.875rem;
}

/* Scheduler Section */
.scheduler-section {
    background: var(--light-gray);
}

.scheduler-controls {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.scheduler-grid {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    overflow-x: auto;
}

.scheduler-table {
    width: 100%;
    border-collapse: collapse;
}

.scheduler-table th {
    background: var(--gradient-primary);
    color: var(--white);
    padding: var(--spacing-sm);
    text-align: left;
    font-weight: 600;
}

.scheduler-table td {
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--light-gray);
}

.meal-slot {
    min-height: 80px;
    padding: var(--spacing-xs);
    border: 2px dashed var(--light-gray);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.meal-slot:hover {
    border-color: var(--primary-green);
    background: rgba(67, 203, 137, 0.05);
}

.meal-slot.filled {
    border-style: solid;
    border-color: var(--primary-green);
    background: rgba(67, 203, 137, 0.1);
}

.meal-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.meal-name {
    font-weight: 600;
    color: var(--dark);
}

.meal-calories {
    font-size: 0.875rem;
    color: var(--medium-gray);
}

/* Plans Section */
.plans-section {
    background: var(--white);
}

.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.plan-card {
    position: relative;
    background: var(--white);
    border: 2px solid var(--light-gray);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    transition: var(--transition-normal);
}

.plan-card:hover {
    border-color: var(--primary-green);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: var(--spacing-md);
    background: var(--gradient-warm);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.plan-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-sm);
}

.plan-icon i {
    width: 32px;
    height: 32px;
    color: var(--white);
}

.plan-card h3 {
    margin-bottom: var(--spacing-xs);
}

.plan-description {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.plan-features {
    list-style: none;
    margin-bottom: var(--spacing-md);
}

.plan-features li {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
}

.plan-features i {
    width: 20px;
    height: 20px;
    color: var(--primary-green);
}

/* Contact Section */
.contact-section {
    background: var(--light-gray);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-info h2 {
    margin-bottom: var(--spacing-sm);
}

.contact-info p {
    color: var(--medium-gray);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.contact-item i {
    width: 40px;
    height: 40px;
    padding: 8px;
    background: var(--gradient-primary);
    color: var(--white);
    border-radius: var(--radius-sm);
}

.contact-item div {
    display: flex;
    flex-direction: column;
}

.contact-item strong {
    color: var(--dark);
}

.contact-item span {
    color: var(--medium-gray);
    font-size: 0.875rem;
}

.contact-form {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
}

/* Footer */
.footer {
    background: var(--dark);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-brand .brand-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.footer-brand .brand-logo i {
    width: 32px;
    height: 32px;
    color: var(--primary-green);
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
}

.footer-links h4 {
    margin-bottom: var(--spacing-sm);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-links a:hover {
    color: var(--primary-green);
}

.social-icons {
    display: flex;
    gap: var(--spacing-sm);
}

.social-icons a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.social-icons a:hover {
    background: var(--primary-green);
}

.social-icons i {
    width: 20px;
    height: 20px;
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 968px) {
    .hero-content {
        grid-template-columns: 1fr;
    }
    
    .hero-image {
        display: none;
    }
    
    .calculator-container {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .hero-stats {
        flex-direction: column;
    }
    
    .macro-breakdown {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

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

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

/* Print Styles */
@media print {
    .navbar,
    .hero-buttons,
    .btn,
    .footer {
        display: none;
    }
    
    body {
        background: white;
    }
    
    @page {
        margin: 2cm;
        @top-center {
            content: "FitNutrition - Diet Schedule";
        }
        @bottom-center {
            content: "Created by Helium";
        }
    }
}