:root {
    --primary-color: #2a62ff;
    --dark-bg: #1a1a1a;
    --light-bg: #ffffff;
    --dark-text: #f2f2f2;
    --light-text: #333333;
}
body {
    font-family: 'Source Sans 3', sans-serif;
    background: var(--light-bg);
    color: var(--light-text);
    line-height: 1.6;
}
body.dark-mode {
    background: var(--dark-bg);
    color: var(--dark-text);
}
/* Navbar */
.navbar {
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
    background: var(--light-bg) !important;
    transition: all 0.3s ease;
}
body.dark-mode .navbar {
    background: #222 !important;
}
.navbar-brand {
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--primary-color) !important;
    padding: 0px;
}
.nav-link {
    font-weight: 500;
    margin-left: 15px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: inherit !important;
    transition: color 0.2s ease;
}
.nav-link:hover {
    color: var(--primary-color) !important;
}
/* Hero */
.hero {
    padding: 90px 0;
    background: linear-gradient(to right, #f8faff, #f2f6ff);
}
body.dark-mode .hero {
    background: #111;
}
.hero h1 {
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 20px;
}
.search-box input {
    height: 55px;
    border-radius: 12px;
    font-size: 1.1rem;
    box-shadow: 0 3px 8px rgba(0,0,0,0.05);
}
/* Language Cards */
.language-card {
    border: 1px solid #eee;
    border-radius: 14px;
    padding: 25px 15px;
    background: var(--light-bg);
    transition: all 0.25s ease;
    text-align: center;
    height: 100%;
    cursor: pointer;
}
.language-card img {
    width: 40px;
    height: 40px;
}
.language-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 6px 18px rgba(0,0,0,0.12);
    border-color: var(--primary-color);
}
body.dark-mode .language-card {
    background: #222;
    border-color: #333;
}
.language-card h6 {
    margin-top: 10px;
    font-weight: 600;
}
.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin: 60px 0 30px;
    text-align: center;
}
/* Footer */
footer {
    background: var(--primary-color);
    color: white;
    padding: 30px 0;
    margin-top: 50px;
}
footer a {
    color: white;
    text-decoration: none;
    margin: 0 10px;
    font-weight: 500;
}
footer a:hover {
    text-decoration: underline;
}
/* Dark Mode */
.dark-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    margin-left: 15px;
}
/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
    font-size: 2rem;
    }
}

.was-validated .form-control:invalid ~ .invalid-feedback {
    display: block;
}