:root {
    --primary-gradient: linear-gradient(135deg, #FFD166, #F77F00, #D62828, #8338EC);
    --secondary-gradient: linear-gradient(135deg, #8338EC, #D62828);
    --success-color: #10B981;
    --warning-color: #F59E0B;
    --error-color: #EF4444;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --text-light: #9CA3AF;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-dark: #111827;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

/* Header Styles */
header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo i {
    font-size: 1.8rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text-primary);
}

.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--primary-gradient);
    border-radius: 3px;
}

/* Dropdown and Submenu Styles */
.dropdown {
    position: relative;
}

.dropdown .submenu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    box-shadow: var(--shadow-xl);
    border-radius: 0 0 12px 12px;
    padding: 40px 20px 20px 20px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 1000;
    min-width: 1300px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
}

.dropdown:hover .submenu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.submenu-content {
    display: flex;
    justify-content: space-between;
    gap: 2rem;
}

.submenu-section {
    flex: 1;
}

.submenu-section h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid;
    border-image: var(--primary-gradient);
    border-image-slice: 1;
}

.submenu-section ul {
    list-style: none;
}

.submenu-section li {
    margin-bottom: 0.5rem;
}

.submenu-section a {
    text-decoration: none;
    color: var(--text-secondary);
    transition: var(--transition);
    display: block;
    padding: 0.35rem 0;
    font-size: 0.9rem;
    white-space: nowrap;
    position: relative;
    padding-left: 0;
    transition: all 0.2s ease;
}

.submenu-section a:hover {
    color: var(--text-primary);
    padding-left: 8px;
}

.submenu-section a:hover::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 4px;
    background: var(--primary-gradient);
    border-radius: 50%;
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-primary);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.1), rgba(131, 56, 236, 0.1));
    padding: 5rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(131, 56, 236, 0.1) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr 1fr;
    }
}

.hero-text {
    text-align: center;
}

@media (min-width: 768px) {
    .hero-text {
        text-align: left;
    }
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

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

@media (min-width: 768px) {
    .hero-buttons {
        justify-content: flex-start;
    }
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    font-size: 1.1rem;
    padding: 1rem 2rem;
}

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

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

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: #8338EC;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-calculator {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 400px;
}

.hero-calculator h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    text-align: center;
}

.hero-form-group {
    margin-bottom: 1rem;
}

.hero-form-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
}

.hero-calculate-btn {
    width: 100%;
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.hero-calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Quick Access Section */
.quick-access-section {
    padding: 5rem 0;
    background: var(--bg-primary);
}

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

.section-title-large {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-align: center;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.quick-access-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.quick-access-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-align: center;
    cursor: pointer;
}

.quick-access-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.quick-access-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.2), rgba(131, 56, 236, 0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin: 0 auto 1rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.quick-access-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.quick-access-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Categories Section */
.categories-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

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

.category-card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.2), rgba(131, 56, 236, 0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.category-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.category-list {
    list-style: none;
}

.category-item {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

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

.category-item a {
    text-decoration: none;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
}

.category-item a:hover {
    color: var(--text-primary);
}

.category-item i {
    font-size: 0.875rem;
    color: #8338EC;
}

/* Features Section */
.features-section {
    padding: 5rem 0;
    background: var(--bg-primary);
}

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

.feature-card {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    height: 100%;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, rgba(255, 209, 102, 0.2), rgba(131, 56, 236, 0.2));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    margin: 0 auto 1.5rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    text-align: center;
}

.feature-description {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 1.1rem;
    text-align: center;
}

/* CTA Section */
.cta-section {
    padding: 5rem 0;
    background: var(--primary-gradient);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.1);
}

.cta-content {
    position: relative;
    z-index: 1;
}

.cta-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
    text-align: center;
}

.cta-subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    text-align: center;
}

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

.btn-cta {
    background: white;
    color: #8338EC;
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

.btn-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

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

.btn-cta-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* Footer */
footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    font-size: 1.125rem;
    margin-bottom: 1rem;
    color: white;
}

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

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
    display: block;
    padding: 0.25rem 0;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
}

/* Search Section */
.search-section {
    padding: 2rem 0;
    background: var(--bg-secondary);
}

.search-container {
    max-width: 600px;
    margin: 0 auto;
}

.search-box {
    display: flex;
    gap: 0.5rem;
}

.search-input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.search-input:focus {
    outline: none;
    border-color: #8338EC;
    box-shadow: 0 0 0 3px rgba(131, 56, 236, 0.1);
}

.search-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .submenu-content {
        flex-wrap: wrap;
    }
    
    .submenu-section {
        flex: 0 0 calc(50% - 1rem);
    }
    
    .dropdown .submenu {
        min-width: 600px;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .dropdown .submenu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 1rem 0 0;
        display: none;
        min-width: auto;
        left: auto;
        transform: none;
    }

    .dropdown.active .submenu {
        display: block;
    }

    .submenu-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .submenu-section {
        flex: 1;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .hero-title {
        font-size: 2rem;
    }

    .section-title-large {
        font-size: 2rem;
    }
}

@media (max-width: 640px) {
    .dropdown .submenu {
        min-width: auto;
        width: 100%;
    }
    
    .submenu-section {
        flex: 0 0 100%;
    }
}
/* Change to fixed positioning */
header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: fixed;  /* Changed from sticky to fixed */
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
}

/* Add padding to body to prevent content from hiding behind fixed header */
body {
    padding-top: 70px; /* Adjust based on your header height */
}