body {
    margin: 0;
    font-family: "Segoe UI", Arial, sans-serif;
    background: #f8fafc;
    color: #1f2937;
}

.navbar {
    height: 64px;
    background: white;
    border-bottom: 1px solid #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
}

.nav-left,
.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    font-weight: 600;
    font-size: 18px;
    color: #2563eb;
    text-decoration: none;
}

.nav-link {
    text-decoration: none;
    color: #374151;
    padding: 6px 10px;
    border-radius: 6px;
    transition: background 0.2s;
}

.nav-link:hover {
    background: #f1f5f9;
    color: #2563eb;
}

.btn-login {

    background: #2563eb;

    color: white;

    padding: 8px 16px;

    border-radius: 6px;

    text-decoration: none;

    font-weight: 500;

    transition: background 0.15s;
}

.btn-login:hover {
    background: #1d4ed8;
}

.btn-logout {

    color: #ef4444;

    text-decoration: none;

    padding: 8px 12px;

    border-radius: 6px;
}

.btn-logout:hover {
    background: #fef2f2;
}

.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    margin-left: auto;
    z-index: 1001;
}

.burger-menu span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #2c3e50;
    border-radius: 2px;
    transition: all 0.2s ease;
}

.burger-menu.open span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
}
.burger-menu.open span:nth-child(2) {
    opacity: 0;
}
.burger-menu.open span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
}

.mobile-menu.show {
    display: flex;
}

.mobile-link {
    display: block;
    padding: 12px 20px;
    text-decoration: none;
    color: #1f2937;
    font-size: 1rem;
    border-bottom: 1px solid #f0f0f0;
}

.mobile-link:hover {
    background-color: #f8f9fa;
}

.btn-login-mobile, .btn-logout-mobile {
    font-weight: 500;
}

.burger-menu {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    cursor: pointer;
    margin-left: auto;
    z-index: 1001;
}
.burger-menu span {
    width: 100%;
    height: 3px;
    background-color: #2c3e50;
    border-radius: 2px;
    transition: all 0.2s;
}
.burger-menu.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.burger-menu.open span:nth-child(2) { opacity: 0; }
.burger-menu.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }
.mobile-menu {
    display: none;
    position: fixed;
    top: 64px;
    left: 0;
    width: 100%;
    background: white;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    flex-direction: column;
    z-index: 1000;
}
.mobile-menu.show { display: flex; }
.mobile-link {
    padding: 12px 20px;
    text-decoration: none;
    color: #1f2937;
    border-bottom: 1px solid #e2e8f0;
}
.mobile-link:hover { background: #f8f9fa; }
@media (max-width: 768px) {
    .burger-menu { display: flex; }
    .navbar .nav-left .nav-link,
    .navbar .nav-right { display: none; }
    .navbar .nav-left { flex: 1; }
}
@media (min-width: 769px) {
    .mobile-menu, .burger-menu { display: none !important; }
}