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

:root {
    /* Enhanced Primary colors - Professional and cohesive blue palette */
    --primary-color: #2563eb;
    --primary-light: #3b82f6;
    --primary-dark: #1d4ed8;
    --secondary-color: #1e40af;
    --secondary-light: #3b82f6;
    --secondary-dark: #1e3a8a;
    --accent-color: #6366f1;
    
    /* Neutral colors - Improved contrast and sophistication */
    --white: #ffffff;
    --light-gray: #f8fafc;
    --gray: #f1f5f9;
    --medium-gray: #e2e8f0;
    --dark-gray: #94a3b8;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --text-light: #94a3b8;
    
    /* Status colors - Vibrant and distinguishable */
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
    --info-light: #eff6ff;
    --warning-light: #fef3c7;
    --success-light: #d1fae5;
    --error-light: #fee2e2;
    
    /* Spacing - Consistent and systematic */
    --spacing-xs: 6px;
    --spacing-sm: 12px;
    --spacing-md: 18px;
    --spacing-lg: 28px;
    --spacing-xl: 42px;
    --spacing-xxl: 64px;
    
    /* Border radius - Modern rounded corners */
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 22px;
    --radius-xl: 28px;
    --radius-full: 50%;
    
    /* Shadows - Natural depth */
    --shadow-sm: 0 2px 10px rgba(0, 0, 0, 0.07);
    --shadow-md: 0 5px 20px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 20px 45px rgba(0, 0, 0, 0.15);
    --shadow-inset: inset 0 2px 8px rgba(0, 0, 0, 0.05);
    
    /* Transitions - Polished animations */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;
    --transition-transform: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography - Enhanced readability */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, system-ui, -apple-system, sans-serif;
    --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, system-ui, -apple-system, sans-serif;
    --font-size-xs: 0.8rem;
    --font-size-sm: 0.9rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --font-size-7xl: 4.5rem;
    
    /* Font weight - Consistent usage */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    --font-weight-black: 900;
    
    /* Line height - Improved readability */
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.7;
    
    /* Letter spacing - Improved readability */
    --letter-spacing-tight: -0.025em;
    --letter-spacing-normal: 0;
    --letter-spacing-wide: 0.025em;
    --letter-spacing-wider: 0.05em;
    --letter-spacing-widest: 0.1em;
    
    /* Opacity */
    --opacity-hover: 0.9;
    --opacity-active: 0.8;
    --opacity-disabled: 0.6;
}

body {
    font-family: var(--font-primary);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    background-color: var(--light-gray);
    overflow-x: hidden;
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
body, html {
  width: 100%;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}
/* Global Heading Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-5xl);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: var(--letter-spacing-tight);
}

h2 {
    font-size: var(--font-size-4xl);
    font-weight: var(--font-weight-extrabold);
    letter-spacing: var(--letter-spacing-tight);
}

h3 {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
}

h4 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
}

h5 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
}

h6 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

/* Paragraph Styles */
p {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    /* color: var(--text-secondary); */
    margin-bottom: var(--spacing-md);
}

/* Link Styles */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    font-weight: var(--font-weight-medium);
    position: relative;
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* Scroll Animation Classes */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-up {
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.7s ease-out;
}

.slide-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.slide-left {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.6s ease-out;
}

.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-right {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.6s ease-out;
}

.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger animation for grid items */
.stagger-item {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s ease-out;
}

.stagger-item:nth-child(1) { transition-delay: 0.1s; }
.stagger-item:nth-child(2) { transition-delay: 0.2s; }
.stagger-item:nth-child(3) { transition-delay: 0.3s; }
.stagger-item:nth-child(4) { transition-delay: 0.4s; }
.stagger-item:nth-child(5) { transition-delay: 0.5s; }
.stagger-item:nth-child(6) { transition-delay: 0.6s; }

.stagger-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Typography */
@media (max-width: 1024px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
        --font-size-2xl: 1.375rem;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2rem;
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
        --font-size-xl: 1.125rem;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-5xl: 1.75rem;
        --font-size-4xl: 1.5rem;
        --font-size-3xl: 1.375rem;
        --font-size-2xl: 1.125rem;
        --font-size-xl: 1rem;
        --font-size-base: 0.95rem;
    }
    
    h1, h2, h3, h4, h5, h6 {
        margin-bottom: var(--spacing-sm);
    }
    
    p {
        margin-bottom: var(--spacing-sm);
    }
}

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

/* Header Styles */
.header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.98);
}

.header.scrolled {
    box-shadow: var(--shadow-md);
    padding: var(--spacing-sm) 0;
    background-color: rgba(255, 255, 255, 0.99);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--primary-color);
    text-decoration: none;
    transition: all var(--transition-normal);
    gap: var(--spacing-sm);
}

.logo i {
    color: var(--primary-light);
    font-size: var(--font-size-3xl);
    filter: drop-shadow(0 2px 4px rgba(37, 99, 235, 0.2));
    transition: transform var(--transition-transform);
}

.logo:hover i {
    transform: rotate(5deg) scale(1.1);
}

.logo:hover {
    color: var(--primary-dark);
    transform: translateY(-1px);
}

/* Menu Toggle Button */
.menu-toggle {
    display: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    padding: var(--spacing-sm);
    transition: all var(--transition-normal);
    border-radius: var(--radius-sm);
    background-color: transparent;
    border: none;
    position: relative;
    z-index: 1001;
}

.menu-toggle:hover {
    color: var(--primary-dark);
    background-color: var(--light-gray);
}

.menu-toggle.active {
    color: var(--primary-dark);
}

.menu-toggle.active i {
    transform: rotate(90deg);
}

.menu-toggle i {
    transition: transform var(--transition-normal);
}

/* Navigation Menu */
.nav-menu {
    display: flex;
    align-items: center;
    position: relative;
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    margin: 0;
    padding: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-sm);
    position: relative;
    display: inline-block;
    background: linear-gradient(135deg, var(--white) 0%, var(--light-gray) 100%);
    box-shadow: var(--shadow-inset);
}

.nav-menu a:hover {
    color: var(--primary-color);
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--gray) 100%);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transition: all var(--transition-transform);
    transform: translateX(-50%);
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(37, 99, 235, 0.3);
}

.nav-menu a:hover::after {
    width: 80%;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: var(--spacing-xxl) var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
    justify-content: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 25% 25%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 75% 75%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,%3Csvg width="80" height="80" viewBox="0 0 80 80" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffffff" fill-opacity="0.07"%3E%3Cpath d="M50 50c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10s-10-4.477-10-10 4.477-10 10-10zM10 10c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10S0 25.523 0 20s4.477-10 10-10zm10 8c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8zm40 40c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8z" /%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
    animation: subtleFloat 20s ease-in-out infinite;
}

@keyframes subtleFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(1deg); }
}

.hero-content {
    margin-bottom: var(--spacing-xxl);
    max-width: 700px;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero h1 {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-lg);
    line-height: var(--line-height-tight);
    font-weight: 800;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    letter-spacing: -0.02em;
}

.hero p {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xl);
    opacity: 0.97;
    line-height: var(--line-height-relaxed);
    font-weight: 400;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.hero-image {
    position: relative;
    z-index: 1;
    max-width: 950px;
    margin: 0 auto;
    animation: fadeInUp 1s ease-out 0.3s both;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    border: 6px solid rgba(255, 255, 255, 0.15);
    transition: all var(--transition-transform);
    filter: saturate(1.1) contrast(1.05);
}

.hero-image:hover img {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.2);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-transform);
    cursor: pointer;
    font-family: inherit;
    border: 2px solid transparent;
    outline: none;
    position: relative;
    overflow: hidden;
    text-align: center;
    white-space: nowrap;
    -webkit-font-smoothing: antialiased;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all var(--transition-normal);
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-lg);
    font-weight: 700;
    padding: var(--spacing-md) var(--spacing-xl);
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--primary-color) 100%);
}

.btn-primary:active {
    transform: translateY(-1px) scale(0.99);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: linear-gradient(135deg, var(--white) 0%, var(--light-gray) 100%);
    color: var(--text-secondary);
    border: 2px solid var(--medium-gray);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    transform: translateY(-2px) scale(1.01);
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--medium-gray) 100%);
    color: var(--text-primary);
    border-color: var(--dark-gray);
    box-shadow: var(--shadow-md);
}

.btn-secondary:active {
    transform: translateY(0) scale(0.99);
    box-shadow: var(--shadow-sm);
}

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

.btn-outline:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: var(--white);
    transform: translateY(-2px) scale(1.01);
    box-shadow: var(--shadow-md);
}

.btn-outline:active {
    transform: translateY(0) scale(0.99);
    box-shadow: var(--shadow-sm);
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xxl);
    font-size: var(--font-size-xl);
}

/* About Section */
.about {
    padding: var(--spacing-xxl) var(--spacing-md);
    background-color: var(--white);
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 50%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.about h2 {
    text-align: center;
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    position: relative;
    z-index: 1;
    font-weight: 800;
    line-height: var(--line-height-tight);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    z-index: 1;
}

.about-content p {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* Calculators Section */
.calculators {
    padding: var(--spacing-xxl) var(--spacing-md);
    background-color: var(--gray);
    position: relative;
    overflow: hidden;
}

.calculators::before {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 50%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.calculators h2 {
    text-align: center;
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
    font-weight: 800;
    line-height: var(--line-height-tight);
}

.calculator-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.calculator-card {
    background-color: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-transform);
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
}

.calculator-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.calculator-card:hover::before {
    transform: scaleX(1);
}

.calculator-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--medium-gray);
}

.card-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    color: var(--white);
    font-size: var(--font-size-3xl);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-transform);
}

.calculator-card:hover .card-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.calculator-card h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 700;
}

.calculator-card p {
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-xl);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
}

/* Calculator Section */
.calculator-section {
    padding: var(--spacing-xxl) var(--spacing-md);
    background-color: var(--white);
    position: relative;
    overflow: hidden;
}

.calculator-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    right: -20%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.calculator-section h2 {
    text-align: center;
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
    font-weight: 800;
    line-height: var(--line-height-tight);
}

.calculator-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
    border: 1px solid var(--medium-gray);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.calculator-container::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.03) 0%, transparent 70%);
    z-index: -1;
    animation: subtleFloat 15s ease-in-out infinite;
}

@keyframes subtleFloat {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-30px) rotate(1deg); }
}

/* Calculator Form Styles */
.calculator-form {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

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

.form-group label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.form-group input {
    padding: var(--spacing-md) var(--spacing-lg);
    border: 2px solid var(--medium-gray);
    border-radius: var(--radius-md);
    font-size: var(--font-size-lg);
    font-family: var(--font-primary);
    color: var(--text-primary);
    transition: all var(--transition-transform);
    background-color: var(--white);
    box-shadow: var(--shadow-inset);
    position: relative;
}

/* Calculator Button Styles */
.calculator-form .btn-primary {
    width: fit-content;
    margin: 0 auto;
    min-width: 200px;
    justify-content: center;
    font-size: var(--font-size-xl);
    padding: var(--spacing-lg) var(--spacing-xxl);
    letter-spacing: 0.025em;
}

/* Responsive Form Layout */
@media (min-width: 768px) {
    .calculator-form {
        grid-template-columns: repeat(2, 1fr);
        align-items: end;
    }
    
    .calculator-form button {
        grid-column: 1 / -1;
    }
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: var(--shadow-inset), 0 0 0 3px rgba(59, 130, 246, 0.1);
    transform: translateY(-1px);
}

.form-group input:hover {
    border-color: var(--dark-gray);
    transform: translateY(-1px);
}

/* Add a subtle icon for number inputs */
.form-group input[type="number"] {
    background-image: linear-gradient(45deg, transparent 50%, var(--primary-light) 50%);
    background-position: calc(100% - 20px) calc(50% + 2px);
    background-size: 10px 10px;
    background-repeat: no-repeat;
    padding-right: calc(var(--spacing-lg) * 1.5);
}

/* Add a subtle icon for date inputs */
.form-group input[type="date"] {
    background-image: linear-gradient(45deg, transparent 50%, var(--primary-light) 50%);
    background-position: calc(100% - 20px) calc(50% + 2px);
    background-size: 10px 10px;
    background-repeat: no-repeat;
    padding-right: calc(var(--spacing-lg) * 1.5);
}

.form-group input::placeholder {
    color: var(--text-light);
}

/* Calculator Result Styles */
.calculator-result {
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--gray);
    border-radius: var(--radius-xl);
    border: 2px solid var(--medium-gray);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.calculator-result:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.calculator-result h3 {
    font-size: var(--font-size-2xl);
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
}

.result-value {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    line-height: var(--line-height-tight);
    text-shadow: 0 2px 4px rgba(59, 130, 246, 0.1);
}

.result-category {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--radius-full);
    display: inline-block;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-description {
    font-size: var(--font-size-lg);
    color: var(--text-secondary);
    line-height: var(--line-height-relaxed);
}

/* BMI Result Categories */
.result-category.underweight {
    background-color: var(--warning-light);
    color: var(--warning);
}

.result-category.normal {
    background-color: var(--success-light);
    color: var(--success);
}

.result-category.overweight {
    background-color: var(--warning-light);
    color: var(--warning);
}

.result-category.obese {
    background-color: var(--error-light);
    color: var(--error);
}

/* Pregnancy Calculator Result Styles */
.result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--medium-gray);
    font-size: var(--font-size-lg);
}

.result-item:last-child {
    border-bottom: none;
}

.result-item .label {
    font-weight: 600;
    color: var(--text-secondary);
    min-width: 180px;
}

.result-item span:last-child {
    font-weight: 700;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Radio Button Styles */
.radio-group {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    flex-wrap: wrap;
}

.radio-group input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.radio-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    background-color: var(--light-gray);
    border: 2px solid transparent;
}

.radio-group label:hover {
    background-color: var(--gray);
    color: var(--text-primary);
}

.radio-group input[type="radio"]:checked + label {
    background-color: var(--primary-light);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.radio-group label::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    border: 2px solid var(--medium-gray);
    background-color: var(--white);
    transition: all var(--transition-normal);
}

.radio-group input[type="radio"]:checked + label::before {
    border-color: var(--primary-color);
    background-color: var(--white);
    box-shadow: inset 0 0 0 5px var(--primary-color);
}

/* Usage Guide Section */
.usage-guide {
    padding: var(--spacing-xxl) var(--spacing-md);
    background-color: var(--gray);
    position: relative;
    overflow: hidden;
}

.usage-guide::before {
    content: '';
    position: absolute;
    bottom: -30%;
    right: -10%;
    width: 50%;
    height: 160%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    z-index: 0;
}

.usage-guide h2 {
    text-align: center;
    font-size: var(--font-size-4xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    position: relative;
    z-index: 1;
    font-weight: 800;
    line-height: var(--line-height-tight);
}

.guide-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.guide-content h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-3xl);
    text-align: center;
    font-weight: 700;
}

.guide-content h4 {
    color: var(--primary-color);
    margin: var(--spacing-xl) 0 var(--spacing-lg);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.guide-content h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    border-radius: 2px;
}

.guide-item {
    background-color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--medium-gray);
    transition: all var(--transition-normal);
}

.guide-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.guide-item ul {
    padding-left: 1.5rem;
    margin: var(--spacing-md) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.guide-item li {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    position: relative;
    padding-left: var(--spacing-sm);
}

.guide-item li::marker {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: bold;
}

.guide-conclusion {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    margin-top: var(--spacing-xxl);
}

.guide-conclusion h3 {
    color: var(--white);
}

.guide-conclusion ul {
    padding-left: 1.5rem;
    margin: var(--spacing-md) 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.guide-conclusion li {
    color: var(--white);
    font-size: var(--font-size-base);
    position: relative;
    padding-left: var(--spacing-sm);
    opacity: 0.95;
}

.guide-conclusion li::marker {
    color: var(--white);
    font-size: var(--font-size-lg);
    font-weight: bold;
}

.guide-conclusion a {
    color: var(--white);
    text-decoration: underline;
    font-weight: 600;
    transition: opacity var(--transition-normal);
}

.guide-conclusion a:hover {
    opacity: 0.8;
}

/* Footer Styles */
.footer {
    background: linear-gradient(135deg, var(--primary-dark), var(--secondary-dark));
    color: var(--white);
    padding: var(--spacing-xxl) var(--spacing-md) var(--spacing-lg);
    position: relative;
    overflow: hidden;
    border-top-left-radius: var(--radius-xxl);
    border-top-right-radius: var(--radius-xxl);
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,%3Csvg width="80" height="80" viewBox="0 0 80 80" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffffff" fill-opacity="0.07"%3E%3Cpath d="M50 50c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10s-10-4.477-10-10 4.477-10 10-10zM10 10c0-5.523 4.477-10 10-10s10 4.477 10 10-4.477 10-10 10c0 5.523-4.477 10-10 10S0 25.523 0 20s4.477-10 10-10zm10 8c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8zm40 40c4.418 0 8-3.582 8-8s-3.582-8-8-8-8 3.582-8 8 3.582 8 8 8z" /%3E%3C/g%3E%3C/g%3E%3C/svg%3E');
    z-index: 0;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-section h3::before {
    content: '';
    width: 30px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-light), var(--white));
    border-radius: 2px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: var(--font-size-base);
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    position: relative;
}

.footer-links a:hover {
    color: var(--white);
    transform: translateX(5px);
}

.footer-links a::before {
    content: '→';
    color: var(--primary-light);
    opacity: 0;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
    transform: translateX(-5px);
}

.footer-links a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

.footer-social {
    margin-top: 0;
}

.social-icons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-full);
    color: var(--white);
    font-size: var(--font-size-xl);
    transition: all var(--transition-normal);
    text-decoration: none;
    border: 2px solid transparent;
}

.social-link:hover {
    background-color: var(--white);
    color: var(--primary-color);
    transform: translateY(-3px) scale(1.1);
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-size-sm);
    position: relative;
    z-index: 1;
}

.footer-bottom p {
    margin: 0;
}

/* Mobile Responsiveness Enhancements */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.25rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
        --spacing-xxl: 48px;
    }
    
    .hero h1 {
        font-size: var(--font-size-4xl);
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .calculator-form {
        grid-template-columns: 1fr;
    }
    
    .radio-group {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }
    
    .result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .result-item .label {
        min-width: auto;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: var(--white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    text-decoration: none;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    border: 2px solid transparent;
    z-index: 999;
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.1);
    box-shadow: var(--shadow-xl);
    background: linear-gradient(135deg, var(--primary-light), var(--primary-color));
    border-color: var(--white);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-gray);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-light), var(--primary-color));
}

.guide-item ul {
    margin-bottom: 20px;
    padding-left: 30px;
    color: #6c757d;
}

.guide-item li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.guide-conclusion {
    background-color: #e8f5e9;
    border-left: 5px solid #40916c;
    padding: 30px;
    border-radius: 10px;
    margin-top: 40px;
}

.guide-conclusion h3 {
    text-align: left;
    color: #2d6a4f;
}

.guide-conclusion ul {
    padding-left: 25px;
}

.calculator-form {
    margin-bottom: 40px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #495057;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 15px;
    border: 2px solid #e9ecef;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background-color: #fff;
}

.form-group input:focus {
    outline: none;
    border-color: #40916c;
}

/* Radio Group Styles */
.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 10px;
}

.radio-group input[type="radio"] {
    margin-right: 5px;
    width: auto;
    vertical-align: middle;
}

.radio-group label {
    font-weight: normal;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
}

.calculator-result {
    background-color: #fff;
    padding: 30px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.calculator-result h3 {
    margin-bottom: 20px;
    color: #343a40;
}

.result-value {
    font-size: 3rem;
    font-weight: bold;
    color: #2d6a4f;
    margin-bottom: 10px;
}

.result-category {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.result-description {
    color: #6c757d;
    font-size: 1rem;
    line-height: 1.6;
}

.result-item {
    margin-bottom: 15px;
    text-align: left;
    padding: 10px 0;
    border-bottom: 1px solid #e9ecef;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item .label {
    font-weight: bold;
    color: #495057;
    display: inline-block;
    width: 45%;
}

/* Footer Styles */
.footer {
    background-color: #343a40;
    color: #fff;
    padding: 60px 20px 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto 40px;
}

.footer-logo {
    text-align: center;
}

.footer-logo i {
    font-size: 2.5rem;
    color: #40916c;
    margin-bottom: 15px;
}

.footer-logo span {
    display: block;
    font-size: 1.8rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.footer-logo p {
    color: #adb5bd;
    font-size: 0.95rem;
}

.footer-links h4 {
    margin-bottom: 20px;
    color: #fff;
    font-size: 1.2rem;
    padding-bottom: 10px;
    border-bottom: 2px solid #40916c;
    display: inline-block;
}

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

.footer-links li {
    margin-bottom: 15px;
}

.footer-links a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: #40916c;
}

.footer-social h4 {
    margin-bottom: 20px;
    color: #fff;
    font-size: 1.2rem;
    padding-bottom: 10px;
    border-bottom: 2px solid #40916c;
    display: inline-block;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    width: 45px;
    height: 45px;
    background-color: #495057;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 1.2rem;
    transition: all 0.3s ease;
}

.social-icons a:hover {
    background-color: #40916c;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #495057;
    color: #adb5bd;
    font-size: 0.9rem;
}

/* Legal Pages */
.legal-page {
    padding: 60px 20px;
    background-color: #fff;
}

.legal-page h1 {
    text-align: center;
    font-size: 2.5rem;
    color: #2d6a4f;
    margin-bottom: 40px;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.legal-content h2 {
    color: #343a40;
    margin-bottom: 20px;
    margin-top: 30px;
    font-size: 1.8rem;
}

.legal-content h3 {
    color: #495057;
    margin-bottom: 15px;
    margin-top: 25px;
    font-size: 1.4rem;
}

.legal-content p {
    margin-bottom: 20px;
    line-height: 1.8;
    color: #6c757d;
}

.legal-content ul, .legal-content ol {
    margin-bottom: 20px;
    padding-left: 30px;
    color: #6c757d;
}

.legal-content li {
    margin-bottom: 10px;
    line-height: 1.8;
}

.legal-content .table-container {
    overflow-x: auto;
    margin-bottom: 30px;
    padding: 0;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.legal-content table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
}

.legal-content th, .legal-content td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.legal-content th {
    background-color: #f8f9fa;
    font-weight: bold;
    color: #495057;
}

.legal-content tr:last-child td {
    border-bottom: none;
}

/* Contact Page */
.contact-page {
    padding: 60px 20px;
    background-color: #fff;
}

.contact-page h1 {
    text-align: center;
    font-size: 2.5rem;
    color: #2d6a4f;
    margin-bottom: 40px;
}

.contact-content {
    max-width: 600px;
    margin: 0 auto;
    background-color: #f8f9fa;
    padding: 50px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.contact-info {
    margin-bottom: 30px;
}

.contact-info i {
    font-size: 3rem;
    color: #2d6a4f;
    margin-bottom: 20px;
}

.contact-info h2 {
    color: #343a40;
    margin-bottom: 15px;
}

.contact-email {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2d6a4f;
    text-decoration: none;
    transition: color 0.3s ease;
}

.contact-email:hover {
    color: #1b4332;
    text-decoration: underline;
}

/* Responsive Design */
@media (max-width: 768px) {
    .navbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 15px 20px;
        position: relative;
    }
    
    .menu-toggle {
        display: block;
        z-index: 1001;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        height: 100vh;
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        display: flex;
        align-items: center;
        justify-content: center;
        transition: right 0.3s ease;
        z-index: 1000;
        margin-top: 0;
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        gap: 30px;
        text-align: center;
        width: 100%;
        padding: 0 20px;
    }
    
    .nav-menu li {
        width: 100%;
    }
    
    .nav-menu a {
        display: block;
        font-size: 1.2rem;
        padding: 15px;
        color: #495057;
        border-radius: 10px;
        transition: all 0.3s ease;
    }
    
    .nav-menu a:hover {
        background-color: #f8f9fa;
        color: #2d6a4f;
    }
    
    /* Add a close button inside the menu */
    .nav-menu::before {
        content: "\f00d";
        font-family: "Font Awesome 5 Free";
        font-weight: 900;
        position: absolute;
        top: 20px;
        right: 20px;
        font-size: 1.5rem;
        color: #2d6a4f;
        cursor: pointer;
        transition: color 0.3s ease;
    }
    
    .nav-menu::before:hover {
        color: #1b4332;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .calculator-container {
        padding: 20px;
    }
    
    .result-value {
        font-size: 2.5rem;
    }
    
    .result-item .label {
        width: 40%;
        font-size: 0.9rem;
    }
    
    .legal-content {
        padding: 20px;
    }
    
    .contact-content {
        padding: 30px 20px;
    }
    
    .contact-email {
        font-size: 1.2rem;
    }
    
    .usage-guide {
        padding: 40px 20px;
    }
    
    .guide-item {
        padding: 20px;
    }
    
    .guide-content h3 {
        font-size: 1.4rem;
    }
    
    .guide-item h4 {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 40px 20px;
    }
    
    .hero h1 {
        font-size: 1.8rem;
    }
    
    .calculator-grid {
        grid-template-columns: 1fr;
    }
    
    .result-item {
        text-align: center;
    }
    
    .result-item .label {
        width: 100%;
        display: block;
        margin-bottom: 5px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* BMI Result Categories */
.underweight {
    color: #ffb703;
}

.normal {
    color: #2d6a4f;
}

.overweight {
    color: #fb8500;
}

.obese {
    color: #e63946;
}

/* Smooth Scrolling */
html {
    scroll-behavior: smooth;
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-radius: 50%;
    border-top: 3px solid #2d6a4f;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}