* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.navbar {
    background: linear-gradient(135deg, #1e3c72, #2a5298);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}
.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
}
.nav-logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
}
.nav-menu {
    list-style: none;
    display: flex;
    gap: 20px;
}
.nav-menu li a {
    color: #ddd;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    transition: all 0.3s;
}
.nav-menu li a:hover, .nav-menu li a.active {
    background: rgba(255,255,255,0.2);
    color: #fff;
}
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}
.hamburger span {
    width: 25px;
    height: 3px;
    background: #fff;
    border-radius: 2px;
}
.hero {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}
.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}
.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}
.btn-primary {
    background: #fff;
    color: #333;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}
.section {
    padding: 60px 0;
}
.section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 15px;
    color: #1e3c72;
}
.section p {
    text-align: center;
    margin-bottom: 40px;
    color: #666;
}
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}
.card {
    background: #fff;
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
    transition: all 0.3s;
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}
.card i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 20px;
}
.card h3 {
    margin-bottom: 10px;
}
.card .badge {
    display: inline-block;
    background: #e0e7ff;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin: 15px 0;
}
.btn-use {
    background: #667eea;
    color: #fff;
    border: none;
    padding: 10px 25px;
    border-radius: 30px;
    cursor: pointer;
    transition: 0.3s;
}
.btn-use:hover {
    background: #5a6fd6;
}
.trend-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}
.trend-item {
    background: #fff;
    padding: 15px 25px;
    border-radius: 30px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.06);
}
.trend-tag {
    font-weight: 600;
    color: #667eea;
}
.trend-heat {
    margin-left: 10px;
    color: #888;
}
.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: 0.3s;
}
.feature-card:hover {
    transform: scale(1.02);
}
.feature-card i {
    font-size: 2.5rem;
    color: #764ba2;
    margin-bottom: 15px;
}
footer {
    background: #1e3c72;
    color: #ddd;
    text-align: center;
    padding: 30px 0;
}
footer a {
    color: #aac;
}
.admin-login {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea, #764ba2);
}
.login-box {
    background: #fff;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
    text-align: center;
    width: 350px;
}
.login-box h1 {
    margin-bottom: 20px;
}
.login-box input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 1px solid #ddd;
    border-radius: 10px;
}
.login-box .btn-primary {
    width: 100%;
    margin-top: 10px;
}
.error {
    color: #e74c3c;
}
.success {
    color: #27ae60;
}
.admin-panel {
    padding: 20px;
    background: #f5f7fa;
}
.admin-panel textarea {
    width: 100%;
    font-family: monospace;
    border-radius: 10px;
    border: 1px solid #ddd;
    padding: 10px;
}
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        flex-direction: column;
        background: #1e3c72;
        position: absolute;
        top: 60px;
        left: 0;
        width: 100%;
        padding: 20px;
    }
    .nav-menu.active {
        display: flex;
    }
    .hamburger {
        display: flex;
    }
    .hero h1 {
        font-size: 1.8rem;
    }
}