:root {
    --primary-navy: #1E2A44;
    --primary-blue: #005DAE;
    --primary-blue-light: #4D8CFF;
    --primary-blue-dark: #003E7A;
    --neutral-light: #F9FAFB;
    --neutral-medium: #E5E7EB;
    --neutral-dark: #111827;
    --text-light: #1A1A1A;
    --text-dark: #E8ECEF;
    --transition-speed: 0.3s;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-light);
    background-color: var(--neutral-light);
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

body.light-mode {
    background-color: var(--neutral-light);
    color: var(--text-light);
}

body.dark-mode {
    background-color: var(--neutral-dark);
    color: var(--text-dark);
}

/* Navbar */
.navbar {
    background-color: #fff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 1rem 0;
}

.dark-mode .navbar {
    background-color: var(--primary-navy);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.navbar-brand img {
    transition: transform var(--transition-speed);
}

.navbar-brand:hover img {
    transform: scale(1.03);
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1.25rem;
    color: var(--text-light);
    border-radius: 6px;
    transition: all var(--transition-speed);
}

.dark-mode .nav-link {
    color: var(--text-dark);
}

.nav-link:hover, .nav-link:focus {
    color: var(--primary-blue);
    background-color: rgba(0, 93, 174, 0.08);
}

.dark-mode .nav-link:hover, .dark-mode .nav-link:focus {
    color: var(--primary-blue-light);
    background-color: rgba(77, 140, 255, 0.1);
}

.btn-custom {
    background-color: var(--primary-blue);
    color: #fff;
    border: none;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.btn-custom:hover {
    background-color: var(--primary-blue-dark);
    transform: translateY(-1px);
}

.btn-custom:focus {
    outline: 2px solid var(--primary-blue-light);
    outline-offset: 2px;
}

.btn-outline-primary {
    color: var(--primary-blue);
    border-color: var(--primary-blue);
    padding: 0.5rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all var(--transition-speed);
}

.btn-outline-primary:hover {
    background-color: var(--primary-blue);
    color: #fff;
}

.dark-mode .btn-custom {
    background-color: var(--primary-blue-light);
}

.dark-mode .btn-custom:hover {
    background-color: var(--primary-blue);
}

.dark-mode .btn-outline-primary {
    color: var(--primary-blue-light);
    border-color: var(--primary-blue-light);
}

.dark-mode .btn-outline-primary:hover {
    background-color: var(--primary-blue-light);
    color: var(--neutral-dark);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--primary-blue-dark) 100%), linear-gradient(rgba(0, 0, 0, 0.2), rgba(0, 0, 0, 0.2));
    background-blend-mode: overlay;
    padding: 5rem 0;
    color: #fff;
}

.hero-section .display-3 {
    font-size: 3rem;
    font-weight: 700;
    text-shadow: 0 2px 6px rgba(0, 0, 0, 0.3);
}

.hero-section .lead {
    font-size: 1.25rem;
    font-weight: 300;
    opacity: 0.85;
}

.text-white-80 {
    color: rgba(255, 255, 255, 0.8);
}

/* Sections */
.section-padding {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.dark-mode .section-title {
    color: var(--primary-blue-light);
}

/* Cards */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transition: all var(--transition-speed);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.dark-mode .card {
    background-color: var(--primary-navy);
    color:var(--neutral-light)
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.dark-mode .card:hover {
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.card-body {
    padding: 1.75rem;
}

.card-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-blue);
}

.dark-mode .card-title {
    color: var(--primary-blue-light);
}

.card-text {
    font-size: 0.95rem;
    color: var(--text-light);
}

.dark-mode .card-text {
    color: var(--text-dark);
}

/* Form */
.form-label {
    font-weight: 500;
    color: var(--text-light);
}

.dark-mode .form-label {
    color: var(--text-dark);
    title:var(--primary-blue-light)
}

.form-control, .form-select {
    border-radius: 8px;
    border: 1px solid var(--neutral-medium);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all var(--transition-speed);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 0.2rem rgba(0, 93, 174, 0.2);
    outline: none;
}

.dark-mode .form-control, .dark-mode .form-select {
    background-color: var(--primary-navy);
    border-color: #4B5563;
    color: var(--text-dark);
}

.dark-mode .form-control:focus, .dark-mode .form-select:focus {
    border-color: var(--primary-blue-light);
    box-shadow: 0 0 0 0.2rem rgba(77, 140, 255, 0.2);
}

.dark-mode .form-control::placeholder, .dark-mode .form-select::placeholder {
    color: #D1D5DB; /* Lighter placeholder color for better contrast */
}

.form-check-label a {
    color: var(--primary-blue);
}

.dark-mode .form-check-label a {
    color: var(--primary-blue-light);
}

/* Dropdown */
.dropdown-menu {
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border: none;
    background-color: #fff;
}

.dark-mode .dropdown-menu {
    background-color: var(--primary-navy);
}

.dropdown-item {
    border-radius: 6px;
    padding: 0.5rem 1rem;
    font-size: 0.95rem;
    color: var(--text-light);
}

.dark-mode .dropdown-item {
    color: var(--text-dark);
}

.dropdown-item:hover, .dropdown-item:focus {
    background-color: var(--primary-blue-light);
    color: #fff;
}

/* Footer */
.footer {
    background-color: var(--neutral-medium);
    color: var(--text-light);
}

.dark-mode .footer {
    background-color: var(--primary-navy);
    color: var(--text-dark);
}

.footer p {
    font-size: 0.9rem;
}

/* Back to Top */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background-color: var(--primary-blue);
    color: #fff;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-speed);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.back-to-top:hover {
    background-color: var(--primary-blue-dark);
}

.back-to-top.show {
    opacity: 1;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

/* Utilities */
.text-primary {
    color: var(--primary-blue) !important;
}

.bg-primary {
    background-color: var(--primary-blue) !important;
}

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

.dark-mode .bg-light {
    background-color: var(--primary-navy);
}

.d-none {
    display: none;
}

.error-message {
    color: #DC2626;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.form-message {
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
}

.form-message.success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #6EE7B7;
}

.form-message.error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FCA5A5;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-nav {
        margin-top: 1rem;
        text-align: center;
    }
    .hero-section .display-3 {
        font-size: 2.25rem;
    }
    .section-title {
        font-size: 1.75rem;
    }
    .card-body {
        padding: 1.25rem;
    }
    .back-to-top {
        width: 40px;
        height: 40px;
    }
}