* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #2f3640;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    z-index: 1000;
}

/* Hamburger Menu */
.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px;
    z-index: 1001;
    transition: transform 0.3s ease;
}

.hamburger:hover {
    transform: scale(1.1);
}

.hamburger span {
    display: block;
    width: 30px;
    height: 3px;
    background: #ffffff;
    border-radius: 3px;
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(8px, -8px);
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    height: 100vh;
    background: #1e272e;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.5);
    transition: left 0.3s ease;
    z-index: 1002;
    overflow-y: auto;
}

.sidebar.active {
    left: 0;
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.sidebar-header h2 {
    color: #ffffff;
    font-size: 1.5rem;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 2rem;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s ease;
}

.close-btn:hover {
    color: #ff6b6b;
}

.menu-list {
    list-style: none;
    padding: 20px 0;
}

.menu-list li {
    margin: 0;
}

.menu-list li.menu-section {
    color: #888;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 15px 20px 10px 20px;
    letter-spacing: 1px;
}

.menu-list li a {
    display: block;
    color: #ffffff;
    text-decoration: none;
    padding: 12px 20px 12px 30px;
    transition: all 0.3s ease;
    border-left: 3px solid transparent;
}

.menu-list li a:hover {
    background: rgba(255, 255, 255, 0.1);
    border-left-color: #667eea;
    padding-left: 35px;
}

/* Overlay */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.overlay.active {
    opacity: 1;
    visibility: visible;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 20px;
}

.content {
    text-align: center;
    padding: 60px 40px;
}

.title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 50px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
}

.logo-container {
    display: flex;
    justify-content: center;
    align-items: center;
}

.logo {
    max-width: 100%;
    height: auto;
    max-height: 500px;
    filter: drop-shadow(0 10px 20px rgba(0, 0, 0, 0.3));
    transition: transform 0.3s ease;
    pointer-events: none;
    user-select: none;
    -webkit-user-drag: none;
    -khtml-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
}

.logo:hover {
    transform: scale(1.05);
}

.subtitle {
    font-size: 2rem;
    font-weight: 300;
    color: #ffffff;
    margin-top: 40px;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.3);
    letter-spacing: 3px;
    opacity: 0.9;
}

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2.5rem;
        margin-bottom: 30px;
    }

    .content {
        padding: 40px 20px;
    }

    .logo {
        max-height: 300px;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.8rem;
        letter-spacing: 1px;
    }

    .content {
        padding: 30px 15px;
    }

    .subtitle {
        font-size: 1.5rem;
        margin-top: 30px;
    }
}