header {
    display: flex;
    align-items: center;
    padding: 20px 0;
    gap: 20px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    user-select: none;
    cursor: default;
}

.logo-icon {
    font-size: 26px;
    filter: grayscale(1);
    transition: var(--transition-smooth);
    transform-origin: center;
}

.logo:hover .logo-icon {
    filter: grayscale(0);
    transform: rotate(-8deg) scale(1.1);
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -0.5px;
    transition: color var(--transition);
}

.logo-text .accent {
    color: var(--accent);
}

#nav {
    display: flex;
    gap: 2px;
    margin-left: 40px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--sub);
    font-family: var(--font);
    font-size: 14px;
    padding: 7px 15px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition-smooth);
    letter-spacing: 0.01em;
}

.nav-btn:hover {
    color: var(--text);
    background: var(--accent-bg);
}

.nav-btn.active {
    color: var(--accent);
    background: var(--accent-bg);
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 4px;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--sub);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.icon-btn:hover {
    color: var(--text);
    background: var(--accent-bg);
}

.icon-btn:active {
    transform: scale(0.92);
}

.config-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 20px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
    flex-wrap: wrap;
    border: 1px solid rgba(255, 255, 255, 0.04);
    box-shadow:
        0 4px 24px rgba(0, 0, 0, 0.25),
        0 1px 0 rgba(255, 255, 255, 0.04) inset;
}

.config-group {
    display: flex;
    gap: 2px;
}

.config-separator {
    width: 1px;
    height: 18px;
    background: var(--sub);
    opacity: 0.2;
    margin: 0 6px;
    align-self: center;
}

.config-btn {
    background: none;
    border: none;
    color: var(--sub);
    font-family: var(--font);
    font-size: 13px;
    padding: 5px 12px;
    cursor: pointer;
    border-radius: 8px;
    transition: var(--transition-smooth);
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.config-btn:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

.config-btn.active {
    color: var(--accent);
    background: var(--accent-bg);
}

footer {
    padding: 14px 0;
    flex-shrink: 0;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 28px;
}

.footer-hint {
    color: var(--sub);
    font-size: 12px;
    opacity: 0.6;
    letter-spacing: 0.03em;
    transition: opacity var(--transition);
}

.footer-hint:hover {
    opacity: 1;
}