.header {
    position: sticky;
    top: 0;
    z-index: 1100;
    background: var(--background-paper) !important;
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--divider);
    transition: all 0.3s ease;
    background-color: var(--liberdus-bg-secondary);
    height: 80px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.header-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-2) 0;
    min-height: 64px;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s;
}

.logo-section:hover {
    opacity: 0.8;
    color: inherit;
    text-decoration: none;
}

.logo {
    width: 44px;
    height: 44px;
    transition: transform 0.2s ease-in-out;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: var(--liberdus-font-semibold);
    color: var(--liberdus-text-primary);
    text-decoration: none;
}

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

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    white-space: nowrap;
}

.version-badge {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-left: 12px;
    padding: 2px 8px;
    background: var(--action-hover);
    border-radius: 12px;
    white-space: nowrap;
}

.nav-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: transparent !important;
}

.nav-button {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    padding: var(--spacing-1) var(--spacing-2);
    border: none;
    border-radius: var(--border-radius-lg);
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    cursor: pointer;
    font-size: var(--font-size);
}

.nav-button:hover {
    background: var(--action-hover);
    transform: translateY(-2px);
    text-decoration: none;
    color: var(--text-primary);
}

.nav-button.active {
    background: var(--action-selected);
    color: var(--primary-main);
}

.nav-button .material-icons {
    font-size: 18px;
    opacity: 0.8;
}

.nav-button span {
    font-weight: 600;
}

/* Connect Wallet Button */
.connect-wallet-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 38px;
    padding: 0 16px;
    min-width: 160px;
    background: var(--background-paper);
    border: 1px solid var(--primary-main);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: none;
    text-decoration: none;
}

.connect-wallet-btn:hover {
    background: var(--surface-hover);
    border-color: var(--primary-main);
    transform: translateY(-1px);
}

.connect-wallet-btn svg {
    opacity: 0.8;
    color: var(--primary-main);
}

.connect-wallet-btn .wallet-address-text {
    font-family: "Monaco", "Courier New", monospace;
    font-size: 13px;
    letter-spacing: 0.5px;
}

.connect-wallet-btn .wallet-status-text {
    font-size: 14px;
    font-weight: 600;
}

.connect-wallet-btn.connected {
    border-color: var(--primary-main);
    background: var(--background-paper);
}

.connect-wallet-btn.connected:hover {
    background: var(--surface-hover);
}

.wallet-icon {
    font-size: 1rem;
    margin-right: var(--space-4);
    min-width: 48px;
    text-align: center;
}

.wallet-text {
    font-weight: var(--liberdus-font-medium);
}

.theme-icon {
  font-size: 1.125rem;
}

@media (max-width: 768px) {
    .nav-section {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 12px 0;
    }

    .nav-section {
        gap: 8px;
    }

    .nav-button {
        padding: 8px 12px;
        font-size: 13px;
    }

    .nav-button .material-icons {
        font-size: 18px;
    }

    .connect-wallet-btn {
        padding: 8px 12px;
        font-size: 13px;
    }
}

@media (hover: none) and (pointer: coarse) {
    .nav-button,
    .connect-wallet-btn {
        min-height: 44px;
        min-width: 44px;
    }
}