/* Reset và Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    overflow-x: hidden;
}

/* Navbar Styles */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 1rem 0;
    box-shadow: 0 2px 15px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-size: 1.8rem;
    font-weight: 700;
    color: white !important;
    display: flex;
    align-items: center;
}

.navbar-brand i {
    margin-right: 10px;
    font-size: 2rem;
}

.navbar-nav .nav-link {
    color: rgba(255,255,255,0.9) !important;
    margin: 0 15px;
    font-weight: 500;
    transition: all 0.3s;
}

.navbar-nav .nav-link:hover {
    color: white !important;
    transform: translateY(-2px);
}

.navbar-nav .nav-link.active {
    color: white !important;
    font-weight: 600;
}

.btn-login {
    background: white;
    color: #667eea;
    padding: 8px 25px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
    color: #667eea;
}

/* Page Header Styles */
.page-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 100px 0;
    color: white;
    text-align: center;
    position: relative;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.page-header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

/* Section Title */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 60px;
    color: #333;
}

/* Footer Styles */
.footer {
    background: #2d3748;
    color: white;
    padding: 60px 0 20px;
}

.footer-title {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-links {
    list-style: none;
    padding: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.3s;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin-right: 15px;
    transition: all 0.3s;
    display: inline-block;
}

.social-links a:hover {
    color: #667eea;
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    color: rgba(255,255,255,0.6);
}

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

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* Utility Classes */
.text-gradient {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}