.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-xl);
    background-color: var(--header-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    position: sticky;
    top: 0;
    z-index: var(--z-fixed);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    cursor: pointer;
    transition: transform var(--transition-base);
    user-select: none;
}

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

.logo-icon {
    position: relative;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-shape {
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: var(--radius-md);
    position: relative;
    animation: float 3s ease-in-out infinite;
    box-shadow:
        0 4px 15px rgba(99, 102, 241, 0.3),
        0 2px 8px rgba(236, 72, 153, 0.2);
}

.icon-shape::before {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: var(--radius-sm);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(45deg);
    animation: pulse 2s ease-in-out infinite;
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    letter-spacing: 1.5px;
}

@keyframes float {
    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }
    50% {
        transform: translateY(-5px) rotate(180deg);
    }
}

@keyframes pulse {
    0%,
    100% {
        opacity: 1;
        transform: translate(-50%, -50%) rotate(45deg) scale(1);
    }
    50% {
        opacity: 0.6;
        transform: translate(-50%, -50%) rotate(45deg) scale(0.8);
    }
}

.navbar {
    display: flex;
    justify-content: center;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-sm);
    margin: 0;
    padding: var(--spacing-sm);
    background: rgba(241, 245, 249, 0.6);
    border-radius: var(--radius-full);
    border: 1px solid var(--glass-border);
}

.nav-links li {
    margin: 0;
}

.nav-links li a {
    display: block;
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    white-space: nowrap;
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
    transform: translateY(-1px);
    font-weight: 600;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    z-index: var(--z-modal);
    transition: transform var(--transition-base);
}

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

.hamburger.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.sidebar {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-base);
    z-index: var(--z-modal);
    overflow-y: auto;
}

.sidebar.active {
    right: 0;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--overlay-bg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: var(--z-modal-backdrop);
}

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

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--glass-border);
}

.close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: all var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-btn:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.sidebar-nav {
    padding: var(--spacing-lg) 0;
}

.sidebar-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-nav li {
    margin: 0;
}

.sidebar-nav a {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
    border-left: 3px solid transparent;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    color: var(--primary-color);
    background-color: var(--primary-light);
    border-left-color: var(--primary-color);
    padding-left: var(--spacing-xl);
}

@media (max-width: 768px) {
    .main-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .navbar {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .logo-icon {
        width: 30px;
        height: 30px;
    }

    .icon-shape {
        width: 24px;
        height: 24px;
    }

    .icon-shape::before {
        width: 12px;
        height: 12px;
    }

    .logo-text {
        font-size: var(--font-size-lg);
        letter-spacing: 1px;
    }
}

@media (min-width: 769px) {
    .sidebar,
    .sidebar-overlay {
        display: none;
    }
}

@media print {
    .hamburger,
    .sidebar,
    .sidebar-overlay {
        display: none;
    }
}