* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}
body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
    color: #333;
    line-height: 1.7;
    overflow-x: hidden;
}
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}
.site-header {
    background: #2c3e50;
    padding: 1rem 0;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.my-logo {
    font-size: 2.2rem;
    font-weight: 800;
    color: #00d8ff;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 2px;
    background: linear-gradient(90deg, #00d8ff, #a855f7);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    transition: transform 0.3s ease;
}
.my-logo:hover {
    transform: scale(1.05);
}
.hamburger {
    display: none;
    background: none;
    border: none;
    font-size: 1.8rem;
    color: #fff;
    cursor: pointer;
}
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}
.main-nav a {
    color: #ecf0f1;
    text-decoration: none;
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.main-nav a:hover,
.main-nav a.active {
    background: #00d8ff;
    color: #2c3e50;
}
.breadcrumb {
    padding: 1rem 0;
    background: #fff;
    border-bottom: 1px solid #e1e8ed;
}
.breadcrumb ol {
    display: flex;
    list-style: none;
    gap: 0.5rem;
    flex-wrap: wrap;
}
.breadcrumb a {
    color: #3498db;
    text-decoration: none;
}
.breadcrumb li:not(:last-child)::after {
    content: '›';
    margin-left: 0.5rem;
    color: #95a5a6;
}
.main-content {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2.5rem;
    padding: 2rem 0;
}
article {
    background: #fff;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.08);
}
.sidebar {
    background: #fff;
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    align-self: start;
    position: sticky;
    top: 100px;
}
h1 {
    color: #2c3e50;
    font-size: 2.8rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    border-left: 6px solid #00d8ff;
    padding-left: 1rem;
}
h2 {
    color: #2980b9;
    margin: 2.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px dashed #3498db;
}
h3 {
    color: #16a085;
    margin: 1.8rem 0 0.8rem;
}
h4 {
    color: #8e44ad;
    margin: 1.5rem 0 0.6rem;
}
p {
    margin-bottom: 1.2rem;
    text-align: justify;
}
strong {
    color: #e74c3c;
    font-weight: 700;
}
.emoji {
    font-size: 1.2em;
    margin-right: 0.3em;
}
.highlight-box {
    background: linear-gradient(120deg, #e3f2fd, #fce4ec);
    border-left: 5px solid #9b59b6;
    padding: 1.5rem;
    margin: 1.8rem 0;
    border-radius: 0 12px 12px 0;
}
.content-link {
    color: #e74c3c;
    text-decoration: none;
    border-bottom: 1px dotted #e74c3c;
    transition: color 0.3s;
}
.content-link:hover {
    color: #c0392b;
    border-bottom-style: solid;
}
.featured-img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: 12px;
    margin: 2rem 0;
    box-shadow: 0 12px 24px rgba(0,0,0,0.15);
    transition: transform 0.5s ease;
}
.featured-img:hover {
    transform: scale(1.01);
}
.form-section {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
    margin: 3rem 0;
}
.form-group {
    margin-bottom: 1.2rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}
.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s;
}
.form-control:focus {
    border-color: #00d8ff;
    outline: none;
}
.btn {
    background: linear-gradient(90deg, #3498db, #2ecc71);
    color: white;
    border: none;
    padding: 0.9rem 2rem;
    border-radius: 50px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
}
.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 14px rgba(50, 150, 250, 0.4);
}
.widget {
    margin-bottom: 2rem;
}
.widget-title {
    font-size: 1.3rem;
    color: #2c3e50;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #00d8ff;
}
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}
.tag {
    background: #e0f7fa;
    color: #00796b;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    text-decoration: none;
    font-size: 0.9rem;
    transition: all 0.3s;
}
.tag:hover {
    background: #00796b;
    color: white;
}
.site-footer {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 3rem 0 1.5rem;
    margin-top: 3rem;
}
.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}
.footer-section h3 {
    color: #00d8ff;
    margin-bottom: 1.5rem;
}
.footer-links {
    list-style: none;
}
.footer-links li {
    margin-bottom: 0.8rem;
}
.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}
.footer-links a:hover {
    color: #00d8ff;
}
friend-link {
    display: block;
    background: rgba(255,255,255,0.05);
    padding: 1rem;
    margin: 1rem 0;
    border-radius: 8px;
}
friend-link a {
    color: #2ecc71;
    text-decoration: none;
    font-weight: 600;
}
.copyright {
    text-align: center;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid #4a6572;
    color: #95a5a6;
    font-size: 0.9rem;
}
@media (max-width: 992px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    .sidebar {
        position: static;
    }
}
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }
    .main-nav ul {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #2c3e50;
        padding: 1rem;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
    }
    .main-nav.active ul {
        display: flex;
    }
    h1 {
        font-size: 2.2rem;
    }
    article, .sidebar {
        padding: 1.5rem;
    }
}