:root {
    /* Light Mode Colors */
    --primary-color: #FF6B35;
    --secondary-color: #004E89;
    --accent-color: #1A659E;
    --bg-color: #FFFFFF;
    --text-color: #212529;
    --light-bg: #F8F9FA;
    --navbar-bg: rgba(255, 255, 255, 0.98);
    --footer-bg: #004E89;
    --card-bg: #FFFFFF;
    --border-color: #E0E0E0;
}

body.dark-mode {
    /* Dark Mode Colors */
    --primary-color: #FF6B35;
    --secondary-color: #1A659E;
    --accent-color: #4A90E2;
    --bg-color: #1A1A1A;
    --text-color: #E0E0E0;
    --light-bg: #2A2A2A;
    --navbar-bg: rgba(26, 26, 26, 0.98);
    --footer-bg: #0D0D0D;
    --card-bg: #2A2A2A;
    --border-color: #404040;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark Mode Toggle */
.dark-mode-toggle {
    position: fixed;
    top: 15px;
    left: 15px;
    z-index: 1050;
    width: 16px;
    height: 16px;
    background-color: transparent;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.dark-mode-toggle:hover {
    transform: scale(1.2);
}

.dark-mode-toggle i {
    color: var(--primary-color);
    font-size: 16px;
}

/* Navbar */
.navbar {
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.navbar-brand:hover {
    color: var(--secondary-color);
}

.nav-link {
    color: var(--text-color);
    font-weight: 500;
    margin: 0 0.5rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

.btn-login {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    border: none;
    transition: all 0.3s ease;
}

.btn-login:hover {
    background-color: var(--secondary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.navbar-toggler {
    border-color: var(--text-color);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(33, 37, 41, 0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

body.dark-mode .navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(224, 224, 224, 0.75)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Banner Section */
.banner-section {
    position: relative;
    background: url('hero-banner-new.jpg') center/cover no-repeat;
    min-height: 600px;
    display: flex;
    align-items: center;
    color: white;
}

.banner-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 78, 137, 0.3) 0%, rgba(26, 101, 158, 0.2) 100%);
}

.banner-content {
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out;
}

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

.banner-section h1 {
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.banner-section .btn-primary {
    background-color: var(--primary-color);
    border: none;
    padding: 0.75rem 2rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.banner-section .btn-primary:hover {
    background-color: #FF8555;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.banner-section .btn-outline-light {
    border: 2px solid white;
    padding: 0.75rem 2rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.banner-section .btn-outline-light:hover {
    background-color: white;
    color: var(--secondary-color);
    transform: translateY(-2px);
}

.min-vh-75 {
    min-height: 75vh;
}

/* Content Sections */
.content-section {
    background-color: var(--bg-color);
    transition: background-color 0.3s ease;
}

.bg-light-section {
    background-color: var(--light-bg);
}

.section-title {
    color: var(--secondary-color);
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
}

/* Feature Cards */
.feature-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    height: 100%;
    border: 1px solid var(--border-color);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.feature-icon i {
    font-size: 32px;
    color: white;
}

.feature-card h4 {
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--text-color);
}

/* Footer */
.footer {
    background-color: var(--footer-bg);
    color: #E0E0E0;
    transition: background-color 0.3s ease;
}

.footer-title {
    color: var(--primary-color);
    font-weight: 700;
    margin-bottom: 1rem;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #E0E0E0;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
}

.footer-links a:hover {
    color: var(--primary-color);
    padding-left: 5px;
}

.footer-text {
    color: #B0B0B0;
    font-size: 0.9rem;
}

.newsletter-form .form-control {
    background-color: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    border-radius: 25px 0 0 25px;
}

.newsletter-form .form-control::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.newsletter-form .form-control:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--primary-color);
    color: white;
    box-shadow: none;
}

.btn-subscribe {
    background-color: var(--primary-color);
    border: none;
    color: white;
    border-radius: 0 25px 25px 0;
    padding: 0.375rem 1rem;
    transition: all 0.3s ease;
}

.btn-subscribe:hover {
    background-color: #FF8555;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-icon {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-icon:hover {
    background-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(255, 107, 53, 0.3);
}

.social-icon i {
    font-size: 18px;
}

.footer-divider {
    border-color: rgba(255, 255, 255, 0.2);
}

.footer-copyright {
    color: #B0B0B0;
    font-size: 0.9rem;
}

/* Dark Mode Specific Adjustments */
body.dark-mode .footer {
    color: #B0B0B0;
}

body.dark-mode .footer-links a {
    color: #B0B0B0;
}

body.dark-mode .footer-links a:hover {
    color: var(--primary-color);
}

/* Responsive Design */
@media (max-width: 991.98px) {
    .navbar-nav {
        padding: 1rem 0;
    }

    .nav-link {
        margin: 0.5rem 0;
    }

    .btn-login {
        margin-top: 1rem;
        display: inline-block;
    }

    .banner-section {
        min-height: 500px;
    }

    .banner-section h1 {
        font-size: 2.5rem;
    }

    .dark-mode-toggle {
        top: 10px;
        left: 10px;
        width: 14px;
        height: 14px;
    }

    .dark-mode-toggle i {
        font-size: 14px;
    }
}

@media (max-width: 767.98px) {
    .banner-section h1 {
        font-size: 2rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .footer {
        text-align: center;
    }

    .footer-links {
        margin-bottom: 1.5rem;
    }

    .social-links {
        justify-content: center;
    }
}

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

/* Loading Animation for Images */
img {
    transition: opacity 0.3s ease;
}

img[loading="lazy"] {
    opacity: 0;
}

img[loading="lazy"].loaded {
    opacity: 1;
}